Yaesu FT-470 Operating Manual
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• • • • • • • • • • • • • • • • • • • • • • • • • • • . . . . ... 2
LIST Of ACCESSO RIES & OPTIONS .•.•.....•••..••..••. 3
CONT RO LS & CONNECTORS ..•.....••......•........ A
TOP PANEL
4
FRONT & SIDE PANELS
6
ACCESSORIES & OPTIONS .......................... B
Battery Packs and Cases
Battery Removal and Replacement
Battery Chargers
Speaker/Microphones
Antenna Considerations
8
9
10
12
12
OPERATION ..................................... 13
Preliminary Operating Information
Squelch Setup
Important Keypad Information
Band Selection
VFO Frequency & Step Selection
Dual Band Reception
l 'ransmi tti ng
Repeater Offsets
Changing the Standard Repeater Offset
Memory Storage
Memory Re cal 1 & Copy
Hiding and Erasing Memories
Call Channel Memory
Alternating Band Memory Selection
Scanning
Memory Skip Scanning
Programmable Memory Scanning (PMS)
Priority Channel Monitoring
Tone Squelch/Pager Operation
Power Saver
APO (Automatic Power-Off)
DTMF Memories
System Reset
13
13
14
15
15
17
17
18
19
19
20
21
22
22
23
23
24
24
25
26
28
28
30
In Case of Problems . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . 31
Getting the Most from Your Batteries . . . . . . . . . . . . . . . . . . .. 3 2
FT-470 2m/70cm DUAL-BAND FM TRANSCEIVER
The FT-470 is an ultra compact FM hand-held providing up to five watts
of RF power on the 2m and 70cm amateur bands. A die-cast rear case
and rubber gasket seals around controls and connectors assure years of
reliability, while multi-tasking microprocessor programming provides a
new level operating flexibility.
Unique features include simultaneous reception on both bands, a CTCSS
(Continuous Tone Controlled Squelch System) with paging features, and
10-memory DTMF Autodialler, all built-in as standard. Twenty multi-
function keys provide the ultimate in programmability of 21 freely
tunable memories and two vfos on each band. All memories store
repeater shifts or separate tx/ rx frequencies, CTCSS tones and tone
encode/decode selections, with one instant-recall call channel memory
and two special purpose memories for limited subband tuning/scanning.
Busy channel band, selective memory and alternating band scanning are
provided along with priority channel monitoring; !MHz up/down stepping;
ARS (automatic repeater shift) when tuned to repeater subbands, plus
a top panel rotary dial for memory and frequency selection. The keypad
serves as a DTMF encoder or Autodialler selector during transmission.
The multi-tasking cpu allows scanning and priority monitoring on both
bands simultaneously.
The liquid crystal display shows 5- ~ frequency digits on both bands,
memory selection, CTCSS tone frequency while setting, paging status
when paged by a CTCSS tone, and includes a bargraph S/PO meter.
Yaesu's power saver system can be set by the operator for optimum
sampling/standby ratio, or can be turned off for packet. And our new
APO (Automatic Power Off) system shuts off the transceiver to avoid
dead batteries if you doze off or are called away unexpectedly.
Operation under difficult conditions is eased by illumination of the
display and translucent keypad and diatonically assigned function-related
keypad beeps.
Please read this manual carefully to gain a· clear understanding of the
features of the FT-470.
·-·-
I -
Frequency coverage (MHz):
see Version Chart
Channel steps:
5, I O, 12.5, 20& 25 kHz
Standard repeater shift:
see Version Chart
Emission type:
G3E
Supply voltage:
s.s to 15.0 voe
Current consumption (single band):
Standby ( I sec. Save) 8mA;
Receive: l 50mA;
T ransmi t (SW): 1300/ 1600 mA
(VHF/UHF);
Auto Power Off: 7 mA
Antenna ( BNC jack):
YHA- 28 rubber flex antenna
Case size (WHO):
55x 147x32mm w/fNB-/FBA-9
55x 164x32mm w/ fNB-/ FBA- 10
55x2 13x32mm w/fNB- 11
55x l 80x32mm w/FNB- 12/-14
55x 152x32mm w/FNB-/FBA- 17
Wei ght (approx):
420g w/fN B-10, 540g w/FN B- 11
RF Power Chart
Battery Ty pe
~RFOutput(W )
""'VHF UHF
(Dry Cell Cases)
fBA-9 (6xAAA cells)
1.5
1.0
FBA- 10/ 17 (6xAA cel ls)
2.0
1.5
(Ni- Cd Packs)
FNB-9 (7.2V/200 mAh)
2.0
1.5
FNB- 10/ 17 (7.2V/600mAh) 2.3
2.3
FNB- 11 (12V/600 mAh)
5.0
5.0
fl\JB-12 (1 2V/500 mAh)
5.0
5.o·
fNB-14 (7.2V/ 1000mAh)
2.3
2.3
-
2 -
RECEIVER
Circuit type:
Double-conversion superhet
Sensitivity (for l 2dB SINAD):
better than O. l 58u V (- 1 OdBu)
Adjacent channel selectivity:
better than 60dB
Intermodulation:
better than 65dB
Audio output:
0.5W @8 ohms for 5°10 THO ( 12V)
TRANSMITTER
Power output:
(see Rf Power Chart)
f requency stability:
better than ±5 ppm (-5 to +60°C)
Modulation sy stem:
vari able reactance
Maximum deviation:
±5 kHz
FM Noise:
better th an -40d8 @ 1 kHz
Spurious emissions:
better than 60dB below carrier
Audio distortion (@ l kHz):
less than 5°10, w/3 kHz devi ation
Microphone type:
2-ki lohm condenser
Burst tone:
1750 Hz (except versions A & H )
Version Chart
Version
A
B
c
H
VHF: 144-146
x
x
x
144- 148
x
UHF: 430-440
x
x
x
430-450
x
UHF Std. Split 5
7.6
1.6
5
LIST OF ACCESSORIES & OPTIONS
MMB-32A
MH-12A2B
YHA-28
MH-18A2B
MH-19A2B
Mobile Ha.nger Bracket
External Hand Speaker/Microphone
Rubber flex antenna
Compact Speaker/Microphone
Earpiece/Microphone
Chargers and Viny I Cases
(See RF Power Chart for list of Battery Packs/Dry Cell Cases)
9 10 1 1 12 14 17
9 10
l l 7V AC Compact Chargers
NC-18B
NC-27B
NC-28B
x
NC-34B
x
"
220-234V AC Compact Chargers
NC-18C
x x
NC-27C
NC-28C
x
x
NC-34C
NC-29 Desktop Quick Charger
x x x x
x
P A-6 Mobile DC Adapter/Chgr
x x
Soft Viny 1 Cases
CSC-35
x
x x
CSC-36
x
x
CSC-37
x x:
CSC-38
x
17 .
Specifications subject to change without notice or obligation. Availabil-
ity of accessortes may vary: some are supplied as standard per local
regulations and requirements, others may be unavailable in some regions.
Check with your Yaesu dealer for additions to the above list.
-
3 -
CONTROLS & CONNECTORS
TOP PANEL
3
(1) EAR Jack
This 2-conductor mini phone jack provides audio output for an external
earphone or optional Speaker/Mic (listed on previous page). When a plug
is installed in this jack the front panel loudspeaker is disabled.
(2) MIC Jack
This 2-conductor micro-mini phone jack accepts microphone input from
an external Speaker/Mic or other external source. When a plug is instal-
led in this jack the front panel microphone is disabled.
(3) DIAL Rotary Selector
•
This 20-position rotary switch tunes the operating (or CTCSS tone) fre-
quency or selects the memory channels, according to which function is
selected by the keys on the front panel. This knob duplicates some of the
functions of the up and down arrow keys for operating convenience.
-
4 -
The inner VO Lume control adjusts receiver volume, and turns the set
OFF when set fully counterclockwise (into the click stop). The outer
BALance control adjust the relative balance of receiver audio for the
VHF and UHF bands, when receiving on both.
(5) SQL Control
This control sets the threshold level at which received signals (or noise)
open the noise squelch. For prolonged battery life and maximum squelch
sensitivity, set this control from counterclockwise just to the point where
noise is silenced (and the BUSY/TX indicator on the front panel is off)
when the channel is clear.
(6) Antenna Jack
This BNC jack accepts the supplied YHA-28 rubber flex antenna, or
any other antenna designed to provide 50-ohm impedance on BOTl-1 the
2m and 70cm bands.
-
G -
.--·
FRONT & SIDE PANELS
( 1) Lamp Button
Press this button to illuminate the display and keypad when necessary.
(2) Monitor (Burst) Button
In version A & H, this button opens the squelch momentarily without
disturbing the setting of the SQL control. In other versions, this button
activates the 1750 Hz Burst tone generator.
(3) PTT Button
Press and hold this (Push-to-Talk) button to transmit on the Main Band.
The BUSY/TX indicator glows red whi le transmitting (or orange when
the secondary band is busy) .
•
( 4) Unlock Lever
Slide this mechanical lever upward to release the battery for removal.
-
6 -
(5) BUSY/TX Indicator Lamp
This LED indicator glo\VS green when the noise squelch is open during
reception, and red when trqosmitting (or orange if the secondary band is
busy).
(6) LCD (Liquid Crystal Display)
The display shows the selected operating conditions as indicated in the
following diagram:
Pa er Active
Alt Ke
ad
Memory Number
Tone Encoder/S uelch Active
Repeater Shift
Memor Ski
~~8
~~-,-1-0
-w---:1'. ~s~a,4---+-
AL'?"T:::....b_T_M_
F:1+---------~-
Memor Tune
f'--'---/
._ii ti tlfli.t
Second
Band Fre •
Selected VFO
:~ '-/3Ct.00 ~ l'-:8.88
•
PTT Locked ...-~lll~f!~:O~il·~~l1l~•ll::
'•=•=
·a=•f•=
· :.:•:::•:.::s::A'.f'E:.:..:l l!\::;
.;4~'.:$;
· .e;~
· !Hl~tm=*'~!:;Lo~w~B~a.!,!tt~er.:r L:!_Vg_oJ_!l
t~a ~e
Keypad Locked
Power Saver
Auto Power Off
S/PO Meter
(7) Keypad
These twenty keys select the various operating features of the trans-
ceiver during reception. The lower six teen also generate DTMF (Dual
Tone Multi frequency) tone pairs during transmission. One or two beeps
sound whenever a key is pressed (if the beeper is active). The label on
the face of each key indicates its primary function, while the label above
it (if present) indicates an alternate function, activated by pressing the
f /M key at the lower right first, and then that key within three seconds.
When referring to an alternate key function in this manual, we usually
show the alternate key label followed by the primary label in parenthe-
ses (). A primary key function is referred to only by the label on the
k~y face, except the arrow keys, which are just called the "arrow keys".
Remember to always press the f /M key first (momentarily, unless
otherwise ·indicated) when you want to use an alternate key function.
All key functions are described in the "Operation" section, and sum-
mari zed on the FT-4 70 Operator's Quick Reference Card.
-
7 -
ACCESSORIES & OPTIONS
Battery Packs and Cases
The following rechargeable Ni-Cd battery packs are recommended for
U;>e with the FT-4 70:
FNB-9
FNB-10
FNB-11
FNB-12
FNB-14
FNB-17
7.2V 200 mAh
7.2V 600 mAh
12V 600 mAh
12V 500 mAh
7 .2V 1000 mAh
7 .2V 600 mAh {compact)
The following battery cases are also available for operating the FT-4 70
with non-rechargeable dry cell batteries {not supplied):
FBA-9 Battery Case for 6 'AAA' {UM-4) dry cells
FBA-10 Battery Case for 6 'AA' {UM-3) dry cells
FBA-17 Compact Battery Case for 6 'AA' {UM-3) dry cells
In some countries, one or more of the above may be supplied with the
transceiver. If not, contact your Yaesu dealer to purchase the desired
battery pack or case. We do not recommend use of any other type of
battery with the FT-4 70: using another type may affect your warranty.
The FN.B-9 through FNB-12, FNB-14 and FNB-17 may be recharged
either while attached to the transceiver or separately, using the battery
chargers described on the following pages. Each Ni-Cd pack should be
fully charged before it is used with the transceiver for the first time.
Note that each of these packs requires a different wall charger:
N 1C-27B/C for the FNB-9, NC-28B/ C for the FNB-10/-17, NC-18B/C for
FNB-11 or FNB-12, and NC-34B/ C for FNB-14. Make certain that you
use the correct charger for each pack. The NC-29 Desktop Quic.k
Charger may be used with all of these Ni".'"Cd packs.
-
8 -
RF power output from the transmitter will differ in some cases accor-
ding to which type of battery is used, as shown in the Rf Power Chart
.
in the Specifications section.
Battery Removal and Replacement
1. Make sure that the VOL control is set into the Off click-stop, and
remove the protective soft or hard case, if used.
2. Grasp the upper portion of the transceiver with your le ft hand, so
that your palm is over the speaker and your left thumb is on the
UN LOCK button.
3. Move the UNLOCK button in the direction indicated by the small
arrowhead, while using your right hand to slide the battery case
toward the side with the UNLOCK button. The battery case should
slide smoothly out of its track.
4. To open the f BA-9, fBA-10 or f BA-17 battery case, place both of
your thumbs on the mounting tracks on top of the case and gently pry
the tracks apart. Install six batteries, paying attention to the polarity
indicated inside the case. Always replace all six cells.
Do not attempt ~open any Q.f the rechargeable Ni-Cd packs.
5. To replace the battery case or Ni-Cd pack, repeat steps 2 and 3
above, simply sliding the battery case in the other direction after
aligning the shorter side of the battery case with the track below the
UN LOCK button.
DO NOT PUT NI-CD CELLS IN AN FBA BATTERY CASES, AS
THESE DO NOT INCLUDE THE PRGTECTIVE DEVICES
NEC~SS . Y FOR SAE QPIERATION ~NI-CD CELLS ~SE
AN FNB ~r-CD PACK IF "'ow NEED A RE'.CiHARGEABt.E P~CK.
-
9 -
It is not necessary to remove the battery pack from the transceiver when
charging, but transceiver operation may be impaired (by noise) while
charging the battery. Therefore we recommend having an extra battery
pack on hand so that the transceiver can be used while the spare pack
is being charged.
Do not attempt to recharge dry cell batteries used in the f8A-9,
F8A-10 or F8A-17.
NC-18B/C
The NC-188 ( 1l7V AC) and NC- I BC (220-234V AC) are compact
chargers for recharging the FN8-11 and FNB-12 Ni-Cd battery packs
from the AC line. A completely discharged pack requires approximately
15 hours to recharge with the NC-188/C. Do not attempt to charge any
of the other Ni-Cd packs with the NC-188/C, as the charging voltage
is too high to safely charge those packs.
NC-278/C
The NC-278 ( 117V AC) and NC-27C (220-234V AC) are compact
chargers for recharging the FN8-9 Ni-Cd battery pack from the AC line.
A completely discharged pack requires approximately 15 hours to re-
charge with the NC-278/C. Do not attempt to charge any of the other
Ni-Cd packs with the NC-278/C, as the charging voltage is not high
enough.
NC-288/C
The NC-288 ( l 17V AC) and NC- 28C (220-234V AC) are compact
chargers for recharging the FNB-10 and FNB-17 Ni-Cd battery packs
from the AC line. A completely discharged pack requires approxim.:itely
15 hours to recharge with the NC-288/C. Do not attempt to charge an.y
of the other Ni·!.Cd packs with the NC-288/C, as the charging voltage
is not correct for those packs.
.. 1 () -· ..
The NC-348 ( 117V AC) and NC-34C (220-234V AC) are compact
chargers for recharging the FN8-1 4 Ni-Cd battery pack from the AC
line. A completely discharged pack requires approximately 15 hours to
recharge with the NC-348/C. Do not attempt to charge any of the other
Ni-Cd packs with the NC-348/C, as the charging voltage and current
are not correct for those packs.
NC-29 5 .. hour Quick Charger
Thi ~ NC-29 is a universal battery charger with quick and trickle char-
ging modes for all of the FN8 Ni-Cd packs listed on page 8. The quick
mode is automatically selected initially, to bring the battery pack up to
full charge as fast as safely possible using an internal timer. Three LED
indicators show elapsed charging time after 1, 3 and 5 hours. The char-
ger then automatically reverts to the trickle mode (green LED indicator),
to prevent self-discharge. The quick mode recharges a completely dis-
charged battery in about 5 hours, depending on temperature.
CAUTION: When using the NC-29, do not remove and then replace a
battery from the charger while it is charging, as this will reset the timer
and may then overcharge the battery .
P A-6 Mo bi le DC-DC Adapter/Charger for FN B-9, FN 8-10, FN B-14 and
FN B-17
The PA-6 is a DC-DC adapter for use when operating the transceiver
mobile, and for charging the FNB-9, FNB-10, FNB-14 and FNB- 17
Ni-Cd battery packs. The PA-6 recharges a completely discl1arged
FNB-9 in about 5 hours, an FNB-10/ -17 in about 15 hours, or trickle
charges an FN B-14 (to full charge in about 35 hours). Care must be used
to avoid overcharging the batteries, as the P A-6 does not include a
timer. The PA-6 cannot be used for char ging the FNB-11 or FNB-12, as
the charging voltage is too low.
Use with 12-volt negative ground electrical systems only.
·-·- l l ...
The MH-l 2A2B and MH-:- l 8A2B Speaker/Mies and MH-19A2B Earpiece-
/Mic can be used to increase operating convenience and extend com-
munications range and signal strength. Each is equipped with a dual plug
connector which mates with the EAR and MIC jacks on the top panel of
the transceiver, disabling the internal speaker and microphone. The cable
allows the transceiver to be left clipped to your belt, or to be held
overhead above obstructions for improved performance, if required. For
mobile operation with the MMB-32A Mobile Hanger, the transceiver can
be left in the Hanger during operation.
A Speaker/Mic can be held close to your ear during reception; or an
external earphone can be connected to the transceiver via the Speak-
er/Mic plug, attenuating audio from the speaker in the Speaker/Mic. To
transmit just hold the Speaker/Mic close to your mouth and close the
PT1' switch on the microphone (or on the cord of the MH-19A2B).
Antenna Considerations
While the supplied YHA-28 rubber flex antenna is convenient for
short-range operation, the standard BNC connector allows use of higher
gain antennas for extended range base or mobile operation. However,
any antenna used with the FT-470 must have an impedance close to 50
ohms on the operating frequency(ies). Therefore, for dual band operation,
you have two options:
(a) Use an antenna specifically designed for 2m/70cm operation.
(b) Use two single band antennas, connected through an antenna
duplexer {such as the Yaesu model AD-2) to the transceiver ..
Also, if the antenna is connected with a feedline, use only good quality
50-ohm coaxial cable to avoid losses. To obtain a proper fit with some
BNC plugs, you may need to remove the rubber gasket around the
antenna jack on the transceiver.
·····- 12 ·- -
This chapter describes the various transceiver functions in detail. After
studying these descriptions, keep the fT-4 70 Operator's Quick Refer-
ence Card handy in case you need to refresh your memory.
Preliminary Operating Infor111ation
Before operating the transceiver for the first time, charge the battery
pack completely (if using Ni-Cd batteries) as described on pages 8
through 11. If using a dry cell battery case, install the batteries as des-
cribed on page 9.
Connect the YHA-28 rubber flex antenna to the antenna jack on the top
panel. Never operate the transceiver without an antenna connected.
For now, do not connect a Speaker/Mic (until you are familiar with basic
operation).
Before proceeding, please read the Controls and Connectors chapter if
you have not already, to familiarize yourself with the functions of the
controls. Note especially item (7 ) on page 7, which describes the
terminology used in this chapter when referring to the keys.
Except for special cases mentioned later, the lower 16 keys serve as a
DTMF (Dual Tone Multi frequency) tone generator during transmission.
If you have trouble getting the transceiver to work as described, see "In
Case of Problems" on page 31.
Squelch Setup
Set the SQL control fully counterclockwise, rotate the VOL control out
of the click-stop and adjust for a comfortable volume on the noise or
received signal: The BUSY /TX indicator LED should glow green. If a
signal is present, rotate the DIAL selector on the top panel to a channel
where only noise is heard.
Adjust the SQL control just to the point where the noise is silenced and
the LED is extinguished. If the SQL control is set further clockwise,
sensitivity to weak signals will be reduced. Now, whenever a signal
reaches the receiver that is strong enough to open the squelch, the
indicator will glow green.
Note that while receiving, one or more bargraph segments may appear
'
along the bottom of the display, indicating signal strength on the
receiving frequency. This indication is not affected by the squelch
setting, so even squelched signals may have some indication. If you
notice more than one or two bargraph segments appearing while the
squelch is still closed, try reducing the squelch control setting (if you
want to hear weak signals).
The Monitor switch on the A & H versions (just above the PTT switch)
allows checking for channel activity beneath the squelch level and to
adjust the volume without having to adjust the squelch: just press the
Monitor switch and the squelch will open. Above the Monitor switch (the
Burst switch on European versions) is the Lamp switch. Press it to light
the display and keypad.
Important Keypad Infor111ation
If the keypad beeper is enabled, each key on the keypad produces its
own beep (or combination) when the key action is accepted. If you don't
hear a beep when a key is pressed, either the volume is set too low, or
the keystroke was not accepted. During transmission, key tones of the
lower 16 keys are the DTMF tone pairs (which are also transmitted).
Pressing the F/M key (at the lower right corner) momentarily activates
the alternate keypad functions, labelled on the panel just above each
key. If no key is pressed within three seconds of pressing the F /M key,
the keys return to their standard functions, labelled on each keyface.
Throughout this manual, when we say ''press the f/M key" we mean
press it just momentarily (less than ~second), unless specified otherwise.
The keypad can be locked to prevent inadvertent changes in frequency
and functions, by pressing F/M followed by the LOCK(6) key. When the
·--·· l '1 . ., ..
keypad is locked a small "L'' in reversed letters is displayed in the lower
left corner, and the keypad tones (while r eceiving) are then as follows:
.
.
-
. .
.
..
·-
.. ··-
·-
. 1UNE
T SET
LOW
1119-i.7
~VI:.
APO
LOCK
IV1HT
STEP
111 : ~.1'
P fT LOCK RPTSET Sl(P
BELL
PAI
'~--- .1 !l 11 z .Jl fCJ ··11 [rrj I!_ 4 11 [L 'li_ JJ tc Cl . d (c " · 1] [1 1 11 ~~a
ir~_!J:,i)
[I eef iJ 11 mJ1 lj ... ·a )I [1 vto ~ [iif M 11
Feel free to use the keypad as a piano when the keypad is locked (who
said we would couldn't fit a piano in a hand-held?). The only key
combination that will affect transceiver operation is f / M followed by
LOCK(6) within three seconds, which unlocks the locked keypad.
When unlocked, the tones produced by the arrow keys are changed to
audibly indicate the direction of the arrow, and some other keys also
sound twice in certain conditions.
You can expect keypad operation to become easier as you become
accustomed to the tone(s) associated with each key and function. If you
want to disable the keypad beeper, press f / M and then the BEEP(8) key .
Repeat these keystrokes to turn it back on (we recommend you keep it
on at least while learning the key functions).
The PTT switch can also be locked (independently of the keypad) to
prevent inadvertent transmission, by pressing F /M followed by the PTT
LOCK(9) key. When the PTT is locked a small "Ptt" in reverse letters is
displayed in the lower left corner. Press the same keys again to unlock.
Band Selection
Press the BAND key on the top row to switch the primary operating
band between 2m and 70cm bands.
VFO Frequency & Step Selection
Make sure the keypad is unlocked, and press the VFO button, if neces-
sary, to select the VFO mode (see box next page). l 'he FT-470 has two
vfos, labelled A and B, either of which can be used for all of the
. .. 1r:) ..... ..
. ..
procedures described in this manual. You can change vfos with the VFO
button at any time, allowing one to serve as an extra memory.
You have several ways to tune the FT-4 70: in selectable steps or 1 MHz
steps with the arrow keys or DIAL knob, and direct keypad entry.
Use the DIAL knob to tune the displayed VFO frequency at the current
channel step rate. You can 'also press the arrow keys momentarily to do
this, but if you press an arrow key for more than !-second scanning will
start. This is described later, so for now, just press an arrow key again
to stop (if you have to).
To change the MHz range of the VFO, you can press the F/M key
followed by an arrow key (or turn the DIAL knob). Note the beeps when
using the arrow keys: (
.~ =: ) when moving up, and ( ~) when moving
down. When done press F/M again, or just wait three seconds.
You can also enter a frequency directly just by keying in the 1 MHz
and the kHz digits. If you are using 5 or 10 kHz steps enter four digits.
Otherwise just three digits will do. Partial entries can be cancelled with
the VFO key.
Tuning steps are factory preset according to version. To change to
another step size press F/M and then STEP(?) and use the DIAL knob or
arrow keys to select 5, 10, 12.5, 20 or 25 kHz steps (displayed at the
right. the "5" or "P" in the shaded box at the upper left is the scan mode
indicator, described later). Once the desired step is displayed, press
STEP(7) by itself to return to the VFO frequency display.
-
16 -
Dual Band Reception
The SUB key along the top row allows you to control the secondary
band. During the above band and frequency selection procedures, you
may have seen the secondary band frequency displayed, or you may have
seen only "---" (in the right half of the display). By pressing the SUB
key you can choose to either display (and receive on) the secondary
band, or to hide it and operate the FT-4 70 like a single band transceiver.
When the secondary band is displayed the receiver combines the
received audio from both displayed frequencies, so you can listen for a
call on one band while monitoring or working stations on the other. Use
the BALance control to adjust the relative audio levels of the two bands,
if necessary, after the VO Lume control has been set.
Ct1anges to the frequency or other settings can only be made on the
primary band (displayed at the left). So if you want to change settings
of the secondary band you must temporarily make it the primary band
by pressing the BAND key. Then make the desired changes, and press
BAND again to return it to secondary status. Note: tone squelch/pager
features are only effective on the primary band, regardless of settings.
Transmitting
Press f /M and then LOW(3) to toggle between high and low power
output. The pitch of the keypad beeper will indicate whether high or
low power is being selected, and "LOW" is displayed above the 1 MHz
digit of the primary frequency when low power is selected (we recom-
mend using low power whenever possible to minimize possible inter-
ference to other stations and prolong battery life).
When you wish to transmit, wait until the channel is clear (BUSY/TX
lamp off), and squeeze the PTT switch. During transmission the BUSY-
/TX lamp glows red or orange (if the secondary channel is busy), and
relative power output is indicated graphically along the bottom of the
display. Release the PTT switch to receive.
-
17 --
If using a European version, press the BURST switch (above the PTT
switch) to transmit a 1750 Hz tone to access repeaters that require it.
Repeater Offsets
The ARS (Automatic Repeater Shi ft) feature provides repeater offset of
the transmit frequency whenever you are tuned to a standard repeater
subband (see diagram below). When enabled, a small "-"or"+" displayed
above the lOO's of MHz digit of the secondary frequency indicates that
repeater shift is active, and closing the push-to-talk switch changes the
display to the (offset) transmit frequency.
/,) 2
\!') m Band : Version A2
144.00
. 145.50
I
s=
: 1 : -~ I s I +
145.JO
~)) 2m Band:Versions 8 1 ,C 1 ,D,H 1
144.00
I
s
146.00
145.80
1-1 s I
146.40
1 s I
146.60
145.60
146.00(Mlfz)
~» 70cm Band: Versions A 1 ,A2
430.00
s
147.00
I +
147.60
J s !
147.40
447.00
- I
148.00(Mflz)
.S : Simplex
-
: Minus Shift
l- : Plus Shift
·150.00 (MHz)
The ARS function is disabled at the factory. It is toggled on and off by
pressing f/M, RPT, f/M and RPT (that is, each key, twice alternately).
Pressing f /M and RPT the first time displays the repeater offset
(adjustable) at the right, and if ARS is now enabled, an "A" in the
shaded box at the upper left. With this display, pressing only the f /M
•
key toggles ARS between enabled and disabled states, and RPT returns
the display to the operating frequency. So after pressing F/M and RPT
the first time, if you want to leave ARS as it is, just press RPT.
Otherwise, press f/M to change it and press RPT once more when done.
When the ARS feature is inactive (either disabled, or when tuned outside
of the standard repeater subbands) the RPT key manually activates
transmitter offset from the displayed receiving frequency for plus or
minus shift. Just press RPT: once for minus shift, or twice for plus shift
("-" or "+
11 displayed above the 100 MHz secondary frequency digit).
When you press the PTT switch to transmit (or the REV key along the
top row to reverse transmit and receive frequencies), the display will
....... 18 ----
shift down or up by the offset programmed for that band, if in band (or
else 'Err' is displayed). Pressing RPT again returns you to simplex
operation.
Changing the Standard Repeater Offset
As mentioned above, a default repeater offset is programmed in the
transceiver for each band, and can be easily reprogrammed as desired.
If you have one or two repeaters in your area with non-standard splits,
you can program separate transmit and receive frequencies in memory
as described later. However, if most or all of the repeaters you use have
an offset different than the default, you can reprogram the standard
offset (as used by the RPT key and ARS) instead.
To change the repeater offset press F/ M and the RPT key to display the
currently programmed offset. Then use the DIAL knob, arrow keys or
numeric keypad entry to change the display.ed offset as required. Any
repeater offset entry must be a multiple of 50 kHz. If you use the keypad
to enter the new offset you will start with the lO's of MHz digit, so if
the new offset is less than 1 MHz, you will have to enter two O's, fol-
lowed by the lOO's of kHz and !O's of kHz digits. For example, press
0090 to select 900 kHz offset (the 1 's of kHz digit is assumed to be
al ways zero). After selecting the desired offset press RPT to return to
the VFO frequency display (but make sure the ARS feature is set as
desired ("A" in the shaded box at the upper left if enabled).
Memory Storage
The FT-470 has 42 memories: for each band there are eighteen general
purpose memories, numbered 1 through 18, and three special memories,
labelled C, L and U. All of these memories can store separate receive
and transmit frequencies or repeater offset, and tone squelch data. The
C memory is recalled instantly when the CALL key at the left end of the
top row of the keypad is pressed (for use as an emergency or call
channel), and the L and U memories are used for PMS operatiot;l,
described later
-
19 -
To store a frequency in memory:
( 1) Select the desired frequency (and repeater offset, if desired) in
the VFO mode as described above.
(2) Press and hold the F/M key for ~-second (until the second beep
sounds). A Memory number appears blinking in the shaded box
at the upper left corner of the display.
(3) Within five seconds of step (2), use the DIAL knob or arrow keys
to select the desired Memory for storage. If you select one that
was already being used, it will be overwritten with new data in
the next step.
(4) Press F/M again to store the displayed data into the selected
Memory: the Memory number will stop blinking for a second,
and then disappear as operation continues in the VFO mode.
When storing split-frequency memories you have the choice of either
the Repeater Offset method, described previously, or of storing indepen-
d1~nt transmit and receive frequencies. For independent transmit and
receive frequencies, just store the receive frequency as described above,
and then tune to the desired transmit frequency, press F/M again for ~
second, and then press and hold the PTT switch while pressing F /M once
more (the transmitter is not activated in this case). By either method the
results will be the same in operation, except that storing an independent
transmit frequency applies only to one memory, while the offset method
applies to all (when the RPT button is pressed).
Memory Recall & Copy
There are two ways to recall stored memories. If you know the memory
number, just enter it on the keypad and then press MR (the "L" memory
is 19 for this purpose, while the " U" memory is 20). If you aren't sure of
the memory number, press the MR to select the Memory mode (a Mem-
ory number/letter is displayed at the upper left), and then use the DIAL
knob or arrow keys to select the desired memory. Naturally, vacant
memories are not displayed.
-·- 20 ····-
For split-frequency memories, "-" or "+" will be displayed to remind
yo11 of the shift if stored by the offset method. If you stored a memory
with a separate transmit frequency, "-+" are displayed together. In
either case, you can press the REV key to check the transmit frequency
without transmitting (and press it again to return).
You can retune a selected memory by pressing the MR key: a small
"MT" appears under the channel box at the upper left, and you can tune
the displayed memory frequency in the same ways as described for the
vfo.3. If you want to store the new memory settings in the current, or
another memory, just follow steps (2) -
(4) of the memory storage
procedure above: operation will be left on the memory.
If you want to copy memory data to a vfo (overwriting previous data),
you can do so while the memory retune feature is active: just press F/ M
and the VFO key to copy to the last-used VFO. If you don't want to save
your changes to the memory, press only the MR key to return to the
original memory data.
Hiding and Erasing Memories
As already mentioned, storing data in a memory automatically overwrites
data that was previously stored there. However, if you regularly move
from one area to another, you may not want to use the same memories
all the time, or you may wish to change your operating memories without
having to rewrite them from scratch. This can be done by masking
certain memories so that they are completely hidden from operation, and
recalling them only when desired for operation.
To completely mask a memory, recall it and press the F /M key for
!-second (until the memory number blinks). Then press the MR key. This
causes the display to change to memory 1, and the previously-selected
memory is no longer selectable manually, or by scanning (as described
later). Note that you cannot hide memory 1.
To unmask a hidden memory for use, recall any memory and press f /M
for -!-second. Then select the memory to be restored, and press MR.
-· 21 _ ....
When you have hidden memories, avoid accidentally overwriting them.
Call Channel Memory
The call channel memory can be instantly recalled by pressing the CALL
key on the top row of the keypad. "C" appears in the memory window at
the upper left corner of the display.
As mentioned earlier, you can store the same kinds of data in the CALL
channel as in the general purpose memories: just follow steps ( 1) and (2)
of the memory storage procedure, and then press the CALL key. Also,
if storing a separate transmit frequency, press the CALL key while
holding the PTT switch when storing the transmit frequency (after the
receive frequency - the transceiver stays in the VFO mode).
Alternating Band Memory Selection
If you want to select among memories on both bands, press F/M and then
AL T(BAND) to activate ALTernating Band Memory Selection. "ALT"
is displayed above the l's of MHz of the secondary frequency display,
and memory selection will alternately select memories on each band, as
in the following diagrams:
All Memories
VHF
2
UHF
--·· .... ···----
--.. ··-· . -·-·· --··-··--- .... _.,_ ........ -·. ·---.... - -·-·--·-·· ... ·-·-- -
--·--··-·--···--·-
Selected Memories Only
vHF
,
2 e
4
" o o " o e-- .. •2 e o o
UHF
2 .~efi.. 0 0
7
0 G/ 0
ll
·~ .--· ·
·
'"
·-·· .. .... -······ -· · ··-··--··~- ---·····-····
.
-····--··· .. .. ... • · .•...... .. -····· ~·-·-·· ...... ·- - -·-...... _ ... ·-
.. --·------·---'
This feature can be especially convenient for memory scanning both
bands, described later.
To cancel Alternating Band Memory Selection press the BAND, MR,
VFO or CALL key (depending on where you want operation to com-
mence).
--- 22 -
Before starting the scanner, make sure background noise is squelched on
a clear channel. Scanning is started and stopped by the arrow keys. Just
press and hold either key for more than ~second to start the scanner.
If in the VFO mode (or on the CALL channel), the whole band will be
scanned. If in the memory mode, only the memories will be scanned (on
alternate bands is the ALT feature is active).
The scanner pauses (and the decimal blinks) when a signal is detected
which is strong enough to open the squelch. You have a choice of two
scan-resume modes: either Pause mode, in which the scanner pauses for
-
as long as the carrier keeps the squelch open, or the ~-second duration
mode, in which the scanner pauses for five seconds and then resumes
scanning whether or not the signal is still present.
To set the scan-resume mode, press F/M and then STEP(7). A small "P"
or "5" in the shaded box at the upper left indicates the current mode.
Press F/M to change it, or just press STEP(?) alone to return to the
frequency display.
You can stop the scanner manually by pressing the PTT or an arrow key,
or by turning the DIAL knob.
The FT-470 can scan the secondary band while operating or also
scanning on the primary band. However, you cannot manually stop the
scanner on the secondary band (without first pressing BAND to change
it to the primary band).
NOTE: The scanner checks about 14 channels per second. To prevent
interruption by the power saver, saver operation is automatically
suspended during scanning, resulting in some increase in power drain.
Memory Skip Scanning
When you have"'some busy channels stored in memories you may wish to
skip them when scanning other memories, but still have them available
for manual selection. You can mark a memory to be skipped by pressing
--·
2:~ --
F/M and then SKIP(MR) while the memory is recalled. A tiny arrowhead
will appear just to the right of the memory number box, and this mem-
ory will be skipped during scanning (you can still recall it manually).
To unmask a scan-skip memory, just repeat the same steps you took to
mask it: select the memory manually, and press F /M and SKIP(MR).
Programmable Memory Scanning (PMS)
In addition to band and memory scanning, the FT-470 can scan between
two frequencies stored in the special memories "L" and "U":
( 1) Store the lower edge of the desired scanning range in memory
L, and the upper edge in memory U.
(2) With either memory U or L recalled, press the MR key. "MT"
appears under the memory number box at the upper left.
You can now tune or scan as described previously, between the nearest
multiples of 100 kHz (xxx.000, xxx.100, xxx.200, etc.) below memories
Land U.
To cancel PMS operation, stop scanning, if necessary (DIAL knob, arrow
keys or PTT), and press the MR key to return to regular memory
operation, or the VFO key to return to VFO mode.
Priority Channel Monitoring
Priority monitoring allows automatic checking for activity on a memory
every five seconds while operating on a vfo or other memories. When a
signal appears on the priority memory while receiving, operation will
automatically shift to that memory, for as long as a carrier is received.
If you transmit while paused on the priority memory, priority monitoring
is cancelled and operation stays on the priority memory.
The squelch must first be preset, and the frequency to be monitored must
be stored in a memory (this MUST be memory 1 if you will be operating
on other memories during priority monitoring).
-
2tl -
Press the VFO key to operate on a vfo, or else select the memory you
want to operate on, and then press F/M and PRI(VFO). A 'P' will appear
in the memory window at the upper left corner of the display, and about
every five seconds the displayed frequency will shift to the priority
memory briefly while the receiver checks for a signal.
As long as no signal appears on the priority men:iory to open the squelch,
you can tune, scan, transmit and receive on the vfo, or select and
operate on other memories or even on the other band. If a station you
wish to talk with appears on the priority memory, press the PTT switch
momentarily while receiving his signal, to stop priority checking (if you
have switched bands, you will have to return to the band on which the
signal has appeared, by pressing the BAND key first. Otherwise, if you
don't transmit when a signal appears on the priority memory, checking
will pause and the decimal on the display will blink; then priority moni-
toring will resume (according to how you set the scan resume mode -
either after a 5-second pause, or after the carrier drops). To cancel
priority monitoring manually, press either the MR or VFO key.
Note that you can use any other memory as a priority channel in the
above procedure when you will be operating on a vfo (while monitoring).
Tone Squelch/Pager Operation
The FT-470 can be used to silently monitor for calls on busy channels
and to transmit CTCSS tones. The transmit (encode) function super-
imposes a subaudible tone (at a frequency too low to be heard) on the
transmitted carrier, while the decode fu·nction monitors receiver audio
through a narrow filter at the same subaudible frequency, keeping the
squelch closed until a matching tone is received. If the p;lging bell
feature is activated, an incoming signal with the matching tone will
cause the speaker to sound an alerting "ring", and a small bell icon will
blink above the !O's of MHz digit of the primary frequency display (so
that you know if a call came in while you were busy elsewhere).
To check or
.~t the CTCSS tone frequency, press F/M and then
TSET(2). The tone frequency will be displayed (in Hz). To change the
tone frequency, rotate the DIAL knob or press the arrow keys until the
··-- 2G -
display shows the tone frequency you require, then press TS ET(2) again
to return to the operating frequency.
NOTE: the keypad beeper it MUST be activated if the paging ring is to
sound when a CTCSS call is received. Press F/M and then BEEP(8) to
toggle the keypad/ring tones on, if desired.
With the keypad/ring tones turned on, you must also activate the paging
bell if you want to use this feature. Press F/M and then BELL(O): a small
bell icon appears above the IO's of kHz digit of the primary frequency
when activated. This icon will blink after a call is received.
To activate tone squelch press F/M and then the TONE(l) key. A "T"
will appear at the top center of the display, and the tone generator will
be enabled for transmission. Press F/ M and TONE( 1) again and "SQ"
will be displayed next to the "T" as tone squelch is enabled for both
transmission and reception (only a matching tone will open the squelch).
Press F/ M and TONE( 1) once more to turn off the tone squelch features.
Once you have the tone squelch set up the way you want, you can store
it in any memory. Afterwards, to change stored settings, just recall the
memory, reset the tone frequency or function, and store the memory
again (press and hold F/M !-second, and then again momentarily).
Power Saver
67.0
79.7
~
+
•
+ • •
·· · · -
·
+
M •
•
'
'
0
•
. .... .. ..... •
•
•
• •
0
·
·
- ··
•
-
•
••
-
·
+ •••• ·1
91.5
103. 5
118.8
136.5
156.7
179.9
210.7
241 .8
. . ... .. .... .. . . . . . .. . ... -·· .
..
..... . ... .
. - ..
71.9
82.5
94.8
107.2
123.0
141.3
162.2
186.2
218. 1
250.3
74.4
77.0
.
.
.
·· · ·· -·· ··· ............ ,,. ·· -·· ... .. .
85.4
97.4
110.9
127 .3
146.2 ' 167.9
192.8
... ..
,<••- ·
· ·· · ·
··· !····· --········ ····
88. 5
100. 0
114 . 8
131. 8
1 ~ I . 4 : 17 3. 8
203. 5
..
..
. .
·- •.
'
'
"'
•
J .. . .
..
.l
.
. ....
225. 7
. . . •.
233 . 6
... .. .
The Power Saver allows the transceiver to monitor a frequency for
activity while drawing as much as 400°/o less current than is required for
normal squelched reception. This is done by removing power from all
circuits (except a timer and the display) for programmable intervals.
Between these intervals, the receiver is enabled for 30ms to check the
displayed frequency for activity. "SAVE" is displayed below the
secondary frequency when the Power Saver feature is enabled. During
power saving, "SAVE" flashes on and off.
.. . 2() .....
When a signal appears the receiver functions normally. However, if the
carrier drops for more than about 3 seconds, power saving resumes
automatically. If the PTT switch is closed at any time during power
saver operation, the transmitter activates as usual .. If no station re.sponds
to the transmission within 3 seconds after releasing the PTT switch,
power saving resumes.
When "SAVE" is not displayed power saving is disabled. To enable it,
press f/M and then SAVE(4), and wait a few seconds. Normally you will
want to keep it enabled, but if you use the FT-4 70 for packet you will
want it disabled, as it might otherwise interfere with packet reception.
To disable power saving, press f/M followed by SAVE(4) and then the
"O" key quickly ("OFF" will be displayed for a few seconds before the
display returns to the operating frequency.
Remember that power saving only occurs when the squelch is closed
(BUSY/TX lamp off). As shipped from the factory, power saving provides
a 1:6.7 duty cycle (30ms receive, 200ms sleep). This ratio can be
reprogrammed frorn the keypad for 1: 1 to 1 :33.3. To do this, first select
the ratio you want from the chart below and note its corresponding key
number, then press f/M, SA VE(4) and the key number you selected
(quickly). The new save time (in seconds) will be displayed before the
display returns to the operating frequency. Turning the transceiver off
does not affect the state (or programmed ratio) of the power saver.
POWER SA VER INTERVALS
Key
Save Time
S3ve/ Rcv
Avg. Current
l
30
l: l
25.5
2
70
2.3: 1
18.4
3
100
3.3: 1
15.8
4
200 (default)
6. 7: 1
12.2
5
300
10: 1
10.8
6
500
16. 7: 1
9.5
7
700
23.3:1
9.0
8
800
26. 7: 1
8.8
9
1000
33.3: 1
8.0
··-·----··-
-
27 ·-·-
EXAMPLE: to program a save ratio of 10: 1 -
Press f/M followed by SAVE(4) and then (immediately) the 5 key.
The display briefly shows 0.30 indicating 300 ms save time.
APO (Automatic Power-Off)
This feature automatically puts the transceiver to sleep if the keypad-
/DIAL knob or PTT button is not used for a selectable period of 10, 20
•
or 30 minutes. One minute before going to sleep, a warning melody will
sound (I i; j I J ] .ij ii }j;J I ; i J I), and the
11 APO" letters along the bottom of
the display will begin to blink. If no key is pressed within the next
minute, the display will change to
11 Off", with the "APO" blinking. If
power saving is also enabled, "SAVE" will appear to the left of" APO",
even though power saving is NOT active in this condition.
"APO" appears at the bottom of the display whenever the APO feature
is enabled. To toggle it on and off, press f /M and then AP0(5).
To check the current setting of the APO timer, turn off the transceiver
and then press and hold the "5" key while turning it back on. The display
will show the current timer setting (in minutes) before changing to the
frequency display. If you want to change the timer setting, turn the
'
transceiver off again, and then press and hold either the "1 ", "2" or "3"
key, for 10-, 20- or 30-minute APO time, respectively, while switching
the transceiver back on.
DTMF Memories
The FT-4 70 provides ten memories, numbered 0 through 9, for storage
of DTMf tone sequences of up to 15 digits each, allowing instant replay
of commonly used remote DTMf control sequences or telephone numbers
to be used on autopatching systems.
A special mode must be activated to ·use the DTMf memory features .
•
This mode is toggled on and off by pressing f /M and then the
DTMf(CALL) Irey at the top left corner of the keypad. "DTMf" appears
at the upper right corner of the display when this mode is active.
-
28 -
To store a DTMF memory:
( 1) Activate the DTMF. memory mode as just described.
(2) Press and hold the F/M key for ~second (until the second beep
sounds).
(3) Within 5 seconds of step (2), press a numbered key correspon-
ding to the DTMF memory number you want to store. The
display will change to the following:
selected DTMF memory number (0- 9)
..---serial digit number (01 to 15) in this memory
..---DTMF tone code* stored in this digit
n ,
-
A
U
f
* DTMF codes are displayed as 0-9, A, b, C, d, E (for *), F (for #)
and " - " for empty (none stored).
(4) Again press and hold F/M for ~second, and then key in the
numbers of the DTMF sequence to store. As you do so, the serial
digit number in the center of the display will increment automat-
ically as the entered code is displayed at the right. If you make
a mistake press the PTT switch and repeat this step.
(5) After entering the
desired DTMF sequence,
press
the
DTMF( CALL) key briefly, and then press the numbered key cor-
responding to the memory number stored, to replay the stored
codes in the l9udspeaker.
(6) Turn the DIAL knob to select another DTMF memory to store,
if desired, and repeat steps (4) and (5).
(7) Press the DTMF( CALL) button to return to the frequency
display.
-
29 -
To recall a stored DTMF memory on the air, first make s.ure the DTMF
memory mode is activated (" DTMF" is displayed). Then close the PTT
switch and press the number of the DTMF memory to transmit.
CAUTION: When the DTMF memory mode is active, the keypad cannot
be used to transmit individual DTMF codes. If you do not have the
required DTMF sequence stored in memory. turn the DTMF memory
mode off [ f /M and then DTMF( CALL)], and then enter the DTMF digits
individually.
System Reset
To reset all programmable features and settings to their factory defaults,
turn off the transceiver and then press and hold both the VFO and MR
keys while switching it back on.
In Case of Problems
The basic features of this transceiver are not complicated, but it is still
possible to get lost, at least until you have had the chance to learn all
of the functions of the keypad and display. If the display shows r1othing
at all, check the power switch (VOL control), and if necessary, remove
the battery pack and check that the contacts are clean. If all appears
to be physically in order, recharge or replace the batteries.
The display includes enough symbols and function indicators to let you
know what is going on as long as power is applied, so it is well worth-
while to study the display diagram on page 7 carefully. for example, if
the frequency display changes unexpectedly when you transmit (or if
'Err' appears), check for a small '+' or
1
-
1 along the top of the display
(just right of center), indicating that repeater shift is active. Also, if
only a few seemingly non-sensical digits appear, try switch.ing the set off
and back on to clear any special display modes, such as tone squelch,
repeater offset, channel step or DTMF memory setting.
Most illegal commands will cause two beeps to sound. If pressing a key
appears to do nothing, first check for a small "Ptt" or an "L" in reverse
type at the lower left, which indicates the Ptt or keypad is locked. If so,
press F/M and then PTT LOCK(9) or LOCK(6) to unlock the PTT switch
or keys. If the "Ptt" or "L" is not there, press the f/M or CALL key,
which will terminate many partially entered commands. If you still
cannot e11ter data, check the TX indicator to see if it is red or orange,
indicating tl~iat the transceiver is transmitting. Releasing the PTT switch
should return the set to receive. If still nothing happens, switch the
transceiver off, and then back on.
If you find the stored data is definitely non-sensical or far from what
you want, try the System Reset procedure described on the previous
page.
To avoid confusion resulting from inadvertent key presses, set the
keypad lock on '[press F/M and LOCK(6)] if you set the transceiver down
while it is on, and then remember to set the lock back off when you wish
to enter data.
. : ~ l .
Getting the Most from Your Batteries
How long the batteries last between charges or replacement depends
largely on your operating habits and how you care for the batteries (if
using a rechargeable Ni-Cd pack). The FT-470 offers a variety of ways
to control current drain to extend the charge life of the batteries.
Knowing how to use these features properly can be critical in emergen-
cies. Here is a summary of the features to consider as good habits:
* Make sure that the set is off when not in use. This can also prevent
premature battery pack failure from over-discharge.
* Unless monitoring for calls, activate the APO feature so that power
drain is minimized if you doze or are called away. Set the APO
time for a 10 minute shutoff, increasing this time only if necessary.
* Always use the power saver feature to monitor for calls (except
packet). If you can ensure your callers will call for at least
~second, you can make maximum use of this feature by setting the
save time to 500 ms (there is little benefit in setting it longer).
* Choose a quiet frequency and keep the squelch closed when
monitoring for a call. Tone squelch can be used to make your own
quiet channel if the entire band is crowded.
* Use the lowest possible volume setting when listening to signals. In
noisy environments, use an earphone or headset so you can keep the
volume low.
* Using the LOW power setting requires about 60°/o less current when
transmitting, so it is a good idea to develop the habit of always
using this setting, switching to high power only if low power fails
to get through. If you live in a location where high power is almost
always needed, consider replacing the antenna with a higher gain
type instead of opting for high power (the result on transmit is 'the
same, with the added benefit of better reception). Make sure that
any external antenna is designed for 50 ohms impedance on the
operating frequency.
As the battery discharges, the voltage drop when transmitting will
increase. When the voltage becomes critical, a tiny battery icon appears
at the lower right corner of the display, indicating that the batteries
should be replaced or recharged as soon as possible.
If using rechargeable batteries, do not keep operating once the battery
icon has come on, as this could cause over-discharge of the cells and
destroy the pack. However, recharging Ni-Cd batteries often, with little
use in between charges, can also lower the effective charge capacity
of the cells. Therefore the best way to get the most out of your Ni-Cds
is to use the battery pack just until the battery icon comes on, and then
immediately give the pack a full recharge. Unfortunately this is not
always convenient, since it can be hard to tell exactly when the charge
will run out. One solution to this problem is to carry an extra, fully
charged pack with you if you do not wish to have operation interrupted.
*
BATTERY CHARGE LIFE
Battery Model
Dry Cell Cases
FBA-9 (UM-4 x 6)
FBA-10/-17 (UM-3 x 6)
Charge Life*
{hours, approx.)
5.8 (w/ Alkaline)
5.8 (w/Manganese)
17 (w/ Alkaline)
1-------
-
--·
·--··--------+-----.. -··----··--···--------··--······-···-·--·-···--
7 .2V Ni-Cd Packs
FNB-9 (200 mAh)
FNB-10/-17 (600 mAh)
FNB-14 (1000 mAh)
1.6
5
1 l
---------t-----
- -··------·--·--- ----
l 2V Ni-Cd Packs
~·---·-·· ..
FNB-11 (600 mAh)
FNB-12 (500 mAh)
4
3.4
operating 6. sec transmit, 6 sec receive and 48 seconds standby
alternately on both bands, with VOL set for 0.25W receive audio,
Power Saver ON and set for 300ms intervals ( 1: 10 duty cycle) •
.. . :1;1 ···-