Icom IC-703 Instruction Manual

different radios in the market place. We want to take a couple of moments of your time to thank you for mak- ing the IC-703 your radio of choice, and hope you agree with Icom’s philosophy of “technology first.” Many hours of research and development went into the design of your IC-703. FEATURES ❍DSP features (AF DSP; UT-106 DSP UNIT required some version) ❍All mode capability covering 160–6 m ❍9.0–15.87 V operation ❍Compact with detachable front panel ❍±0.5 ppm of high frequency stability ❍Built in antenna tuner ❍Simple band scope function IMPORTANT READ THIS INSTRUC ...

Qty. q Hand microphone (HM-103) .............................. 1 w DC power cable (OPC-1229) ............................. 1 e Spare fuse (FGB 4 A) ........................................ 3 r ACC cable ...........................................................1 t 3.5 (d) mm plug ...................................................1 y 6.5 (d) mm Electronic keyer plug.........................1 u Microphone hanger..............................................1 TABLE OF CONTENTS q e r w t y u Icom, Icom Inc. and the logo are registered trademarks of Icom Incorporated (Japan) in ...

IWhen first applying power (CPU resetting)…… 17 DM1 display selection ………………………… 17 IInitial settings …………………………………… 17 IVFO description ………………………………… 18 DThe differences between VFO and memory mode ………………………………… 18 IFrequency setting ……………………………… 19 IOperating mode selection ……………………… 23 IVolume setting…………………………………… 23 ISquelch and receive (RF) sensitivity ………… 24 IDial lock function……………………………� ...

IConnections for packet ………………………… 67 DWhen connecting to [DATA] socket ………… 67 DWhen connecting to [ACC] socket ………… 67 DWhen connecting to [MIC] connector ……… 67 IPacket (AFSK) operation ……………………… 68 DFrequency indication during AFSK operation … 68 DSSB-D mode selection ……………………… 69 DCarrier point setting…………………………… 69 DAdjusting the transmit signal from the TNC… 70 11 CONTROL COMMAND ……………… 71–73 IRemote jack (CI-V) information ……………… 71 DCI-V connection example ………� ...

I Installation 1. Install a ground system for DC noise suppression and RFI suppression 2. Install your DC power supply 3. Install lightning protection. This will help protect more than your gear. 4. Install and connect an antenna system for the ap- propriate bands of operation 5. Connect other peripheral equipment. This includes microphones, headsets, TNC, amplifiers and any other equipment necessary to make your shack complete. Although your radio will operate by connecting the DC power supply and antenna, it is necessary to have a good ground system in your shack. A ground connec- tion is the electrical contact between the com ...

3. Installing lightning protection Although you may not live in an area with high occur- rence for lightning storms, it is always wise to take precautions for lightning or static discharges. Proper lightning protection not only offers protection to the ham gear, but the shack and most importantly the op- erator. NOTE: There are many publications covering proper lightning protection, check with your local dealer for more information and recommendations. Whether your IC-703 is your first radio or one of many, one of your key elements in a great shack is the antenna system. There is a connection on the back of your IC-703, for HF ...

lar-type connector bottom of the front panel or back of the radio. Rear panel Front panel MICROPHONES HM-103 SM-20 OPC-589 III QUICK REFERENCE GUIDE 5. Connect other peripheral equipment Everyone has his or her favorite ad-on gear; now is the time to connect this gear! We will cover the basic devices that can be connected to your IC-703. If you do not see the particular item you are wanting to connect, refer to the Advance Connections section starting on page 14. I Operation 1. Voice CW Key: There are several types of keys or keyers that can be used with your IC-703. a. Iambic Key paddle: Use a 6.35(d) m ...

3. Other convenient items Headphones: A 3.5(d) mm (1⁄4″) mono jack for operation without using the internal or external speakers. Perfect for op- eration without disturbing others in the room. External Speaker: A 3.5(d) mm (1⁄8″) mono jack for operation with an ex- ternal speaker. (Input impedance: 8 Ω/Max. input power: 5 W) Front panel Rear panel SPEAKER or PHONES ∫ SPEAKER √ Select ‘SPEAKER’ with the [PHONES/SPEAKER] switch on the back of the front panel. SPEAKER Front panel HEADPHONES PHONES ∫ SPEAKER √ Select ‘PHONES’ with the [PHONES/SPEAKER] switch on the back of the front panel. 1. Before po ...

D Just listening 1. Select the desired band 3. Adjust audio output On your IC-703, an easy way of changing bands is by using the [(Y)BAND] or [(Z)BAND] located just right corner on the front panel. Push [(Y)BAND] or [(Z)BAND] to select the desired band. •Pushing [(Y)BAND] or [(Z)BAND] continuously scrolls through the available bands. •Say you want to go to 20 meters or 14 MHz; you would push [(Y)BAND] or [(Z)BAND] several times to select it. This will change the displayed operating frequency to the 20-meter band. NOTE: The band stacking register can also be used to select bands. (Refer to p. 22) [Y] [Z] Directly left of the ...

D What are you hearing? Stop and focus on what you are hearing. Do you hear a lot of noise? Is the signal intelligible? Are you set up for the right mode? How about the filters? 1. Verify mode Your IC-703 has many features to reduce QRM and QRN from the desired signal. a. Noise Reduction: The noise reduction system on your IC-703 is part of the DSP. This is used to re- duce the hiss and QRM levels. qSelect S4 (DSP menu). •Push [DISPLAY] once or twice to select S. •Push [MENU] one or more times to select S4. wPush [(F-2)NR] to activate the noise reduction func- tion. •“DSP” and “NR” appear when the function is ON. ...

c. Automatic Notch: The automatic notch will track up to heterodynes. This is helpful for eliminating annoying transmitter “tune up” tones on any band, and to minimize continuous tone “heterodynes” en- countered on the 40 meter phone bands at night, for example. Once selected an icon will appear “ANF” on the display. qSelect S4. •Push [DISPLAY] once or twice to select S. •Push [MENU] one or more times to select S4. wPush [(F-1)ANF] to activate the automatic notch fil- ter. NOTE: Your IC-703 is equipped with an AGC cir- cuit. This allows the DSP to filter out interfering sig- nals and QRM, while also taking th ...

f. Filter: One optional filter can be installed in the IC-703. Narrow filters help reject interference from adjacent signals and obtain good selectivity. Wide filters provide improved audio for SSB opera- tion when no interfering signals are present. Narrow filters for AM/FM modes are standard. FILTER PRESETTING: After you install a filter (see p. 87 for installation), you must specify the installed filter in initial set mode (item “22 OPT. FIL” ; see p. 79). FILTER ON/OFF: qSelect M3. •Push [DISPLAY] once or twice to select M. •Push [MENU] one or more times to select M3. wPush [(F-1)FIL] momentarily to select t ...

1. Setting up your Mic Gain Microphone gain must be adjusted properly so that your signal does not distort when transmitted. qSelect SSB or another phone mode (AM or FM mode). wPush [DISPLAY] for 1 sec. to select quick set mode. ePush [MENU] one or more times to select “Q2 MIC GAIN.” •The ALC meter is selected automatically when operat- ing in SSB mode. rWhile speaking into the microphone, rotate the main dial to adjust the microphone gain so that the ALC meter does not peak past the ALC zone. •While transmitting at your normal voice level, the ALC meter should read at about the middle of the ALC zone. •Be sure the mi ...

The IC-703 has a built-in, low distortion speech com- pressor circuit. This circuit increases your average talk power in SSB mode and is especially useful for DX’ing when the receiving station is having difficulty copying your signal. qSelect USB or LSB mode. wSelect the ALC meter. •Push [DISPLAY] once or twice to select M. •Push [MENU] one or more times to select M3, then push [(F-3)MET] one or more times to select “ALC.” eSelect M4. •Push [MENU] one more time to select M4. rPush [(F-2)COM] to turn the speech compressor function ON. •“COM” appears. tPush [(F-2)COM] for 1 sec. to enter the compres- sion level ...

➥While transceiver’s power is OFF: Push to turn power ON. •Turn the DC power supply ON in advance. ➥While transceiver’s power is ON: ❍Push momentarily to indicate the connected power supply voltage. ❍Push for 1 sec. to turn power OFF. wAF GAIN CONTROL [AF] (inner control; p. 17) Varies the audio output level from the speaker. eRF GAIN CONTROL/SQUELCH CONTROL [RF/SQL] (outer control; p. 24) Adjusts the RF gain and squelch threshold level. The squelch removes noise output from the speaker (closed condition) when no signal is received. •The squelch is particularly effective f ...

tions, selected memory channel, etc. See p. 9 for details. tTUNING STEP SWITCH [TS] (pgs. 19–21) ➥While in SSB/CW/RTTY modes, push momentar- ily to turn the programmable tuning step ON and OFF. While in FM/AM mode push momentarily to toggle the programmable tuning step and 1 MHz quick tuning step. •While the programmable tuning step indicator is dis- played, the frequency can be changed in programmed kHz steps. •0.01 (FM/AM mode only), 0.1, 1, 5, 9, 10, 12.5, 20, 25 and 100 kHz tuning steps are available. •1 MHz quick tuning step are only available in FM ...

➥Push to toggle the RIT or SUB DIAL function ON and OFF—initial set mode is used to select the desired action*. •Lights green when the SUB DIAL function is ON; lights red when the RIT function is ON. •Use the [M-CH] control to vary the RIT frequency or SUB DIAL frequency (see below). ➥When the RIT function is ON, push for 1 sec. to add or subtract the shifted frequency to the oper- ating frequency. *Even if RIT is selected in initial set mode, RIT cannot be se- lected when operating AM or FM modes. ✔What is the RIT function? The RIT (Receiver Incremental Tuning) shifts the ...

➥Push momentarily to toggle the split func- tion ON and OFF. (p. 51) •“ä”appears when the split function is ON. ➥Push for 1 sec. to turn the quick split func- tion ON. (p. 52) •The offset frequency must be programmed in advance using initial set mode. (p. 80) •The offset frequency is shifted from the dis- played frequency. •The quick split function can be turned OFF using initial set mode. (p. 79) VFO A/B SELECTION ➥Push momentarily to toggle VFO A and VFO B in VFO mode. (p. 18) ➥Push momentarily to toggle the transmis- sion VFO and reception VFO d ...

Selects the type of meter displayed (dur- ing transmit) in the function display. •Power, ALC or SWR metering can be se- lected. •Only an S-meter is available for receive. DM4 functions DURING SSB/AM OPERATION: DURING CW OPERATION: DURING RTTY OPERATION: DURING SSB-D OPERATION: DURING FM OPERATION: VOX FUNCTION (p. 53) ➥Push momentarily to toggle the VOX func- tion ON and OFF. •“VOX” appears when the VOX function is ON. ➥Push for 1 sec. to enter the VOX set mode. •The VOX delay, VOX gain and ANTI-VOX can be set in VOX set mode. ✔What is the VOX function? The VOX function (voice operated tra ...