Carver TX-11b Manual 

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Ultra High Fidelity Wide Band AM Stereo Asymmetrical Charge-Coupled FM Detector Thirteen Station Presets Multipath Elimination Circuitry Noise Reduction ...

DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK) NO USER-SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL Safety Instructions 1 Read Instructions - All the safety and operating instructions should be read before the com- ponent is operated. 2 Retain Instructions - The safety and operating instructions should be retained for future reference. 3 Heed Warnings - All warnings on the com- ponent and in the operating instructions should be adhered to. 4 Follow Instructions - All operating and other in- structions should be followed. 5 Water and Moisture - The compon ...

ELECTRICAL CODE INSTRUCTIONS CONTAINED IN ARTICLE 810- "RADIO AND TELEVISION EQUIPMENT" POWER SERVICE GROUNDING ELECTRODE SVSTEM BONDING JUMPE OPTIONAL ANTENNA GROUNDING ELECTRODE a. Use No. 10 AWG (5.3 mmz) copper. No. 8 AWG (8.4 mmz) aluminum. No. 17 AWG (1.0 mmz) copper-clad steel or bronze wire, or larger, as a ground wire. b. Secure antenna lead-in and ground wires to house with stand-off insulators spaced from 4-6 feet (1.22-1.83 m) apart. c. Mount antenna discharge unit as close as possible to where lead-in enters house. d. Use lumper wire not smaller than No. 6 AWG (13.3 mmz) copper, or the equ ...

SAFETY INSTRUCTIONS 3 I. INTRODUCTION 6 II. PLACEMENT, INSTALLATION, AND REAR PANEL CONNECTIONS . 7 III. CONTROLS AND FUNCTIONS 9 IV. MULTIPATH/NOISE REDUCTION AND THE ASYMMETRICAL CHARGE-COUPLED FM DETECTOR™' ... 11 V. ANTENNAS FM AM 12 16 VII. APPENDIX Section 1 FM Stereo Signals and the Asymmetrical Charge Coupled FM Detector 18 Section 2 AM Stereo Signals and the Ultra High Fidelity Wide Band AM Stereo 18 Section 3 Specifications 20 Section 4 Troubleshooting 21 Section 5 Warranty 22 •U.S. Patent4.467,012 IMPORTANT! The TX-11 b's memory preset switches are sensitive. Use a gentle, on-center touch, don't push them too hard, or t ...

Carver TX-11 b Quartz Synthesized Stereo Tuner with Asymmetrical Charge-Coupled FM Detector™ and Ultra High Fidelity Wide Band AM stereo (utilizing Motorola's CQUAM™ system). Your new tuner's special FM circuitry is Bob Carver's brilliant solution for eliminating the distortion and noise that usually make FM listening a less than pleasurable experience. When engaged, these patented circuits enable the TX-11 b to literally pull music from the morass of hiss and distortion associated with multipath interference. You'll be able to consistently, cleanly, quietly enjoy the mu ...

shielded signal leads (dual RCA phono plug to phono plug), and the half-wave dipole antenna, loop antenna, and wire that came in the box along with this manual. If you're planning to install the TX-11 b handles, a philips-head screwdriver will be needed. Placement Place the TX-11 b near the preamp - near enough so the signal cable will reach without excessive strain on the cable itself, or on the connections. Heat, at least normal amounts, shouldn't be any problem. The tuner itself doesn't generate much and isn't sensitive to small amounts. But, you should ne ...

normally no need to ground the tuner itself. But with safety and possibly reduced interference in mind, you may want to ground the tuner chassis. If so, run a heavy (12-gauge or heavier copper/alum.) wire from the tuner to a metal cold water pipe. You'll have to check to make sure the metal pipe is grounded; PVC (plastic) pipes are somtimes run in from the water main to the house, then metal pipes are used within the house. NEVER attach a ground wire to a gas pipe, either for your components, or antenna. The best grounding scheme is a ground rod driven several feet into the e ...

Frequency Display Signal Strength Indicator Stereo Indicator LED Tuning Down Up Power On/OFF FM AM I IF Band Auto Tuning Multipath Reduction (FM) Noise Limiter (AM) L output (white) Noise Reduction (FM) RF Gain (AM) + 12dB Antenna inputs Power The POWER switch on the lower lefthand side of the TX-11 b turns the unit on or off. When you power up, the tuner will be tuned to the same station you were listening to before power was switched off. R output (red) Manual Tuning Tuning What Happens When You Tune the TX-11b? The first in the chain of events that go on inside a tuner is the frequency tuning itself. Here the Carver TX-11 b uses ...

tuner will search to the end of the tuning range, then "turn around" and start scanning in the opposite direction. NOTE: In order to receive signals below 15 \M (very low power, or distant stations), it will be necessary to switch the TX-11 b to MANUAL tuning otherwise these low-strength stations will be cancelled by the muting circuitry. Tune these stations as we described in the preceding section on MANUAL TUNING. Programming Select AM or FM by depressing the momentary switch for AM or FM band. An LED above the switch will indicate band selection. Simply tune to a station or fr ...

very weak and/or very far away. The proper operating position for this switch is pushed in and left that way, just like the noise reduction button is supposed to be pushed in and left that way for normal use. On this unit, RF gain plus 12dB button and the noise reduction button are one in the same and are automatically switched from AM to FM depending on whether you listen to AM or FM. For both noise reduction FM and RF gain for AM you are supposed to leave this button pushed in all the time. For AM, if you have an overload condition, or hear two stations, one on ...

that's unbelivably clean and quiet, without a hint of annoying distortion and noise. With the noise reduction features of the Asymmetrical Charge-Coupled FM Detector, FM stereo listening on cable feed, in many cases, will rival or exceed the noise performance of your tapes (cassettes, reel-to-reel, etc.), in terms of audio quality. Muting Time When either the NOISE REDUCTION or MULT1PATH REDUCTION switches are engaged, a logic system analyzes the signal for multipath and/or noise content. This process requires about 3/4 of a second. Whenever a new station selection is made, the mute tim ...

several. First of all, while the reference dipole will usually deliver enough signals for good reception, is "good" good enough? Consider that the 19 kHz pilot signal the tuner uses to sense a stereo broadcast is transmitted at 1/1 Oth the power of the signal carrier. If this pilot signal is lost, stereo goes away. If the pilot signal is degraded, so will be the stereo separation between the left and right channels. A strong signal is also necessary to reduce noise: noise associated with signal transmission, and noise from localized sources of interference. Directionality can also red ...

properly installed feedline, it should result in more available signal than the antennas we've talked about so far. Perhaps not as much signal as a directional FM antenna because TV antennas are broadband (54 MHz to 216 MHz for a VHP model). However, some TV antennas have special provisions for receiving FM signals, while the rest of the antenna is used for VHP TV reception. That could be more money than you'd want to spend, unless you're using the antenna for both TV and FM reception. If you already possess a TV antenna, or are planning to hook up to a master antenna system in an ...

mast, and boom are properly grounded with a large conductor-wire running from the antenna to a ground rod in as short a path as possible. NOTE: 10-gauge copper, 8-gauge aluminum, or 12-gauge copper- clad steel wire should do the job. However, the heavier the better. Certain masts can be grounded by a bar attachment to a ground rod, with a strap as a connector. This is a superior ground attachment if the mast's base rests on the ground, or special ground plate. • Use stand off insulators to keep the ground wire away from the house. Space these insulators four to six feet apart where practical. ...

areas" where good reception is normally a real problem. Be sure any mast or tower set-up is properly secured with guy wire supports (if needed), and installed where it can't fall into power lines, the neighbor's greenhouse, or whatever. Cable When we talk about cable, we mean a master antenna system supplying high quality TV and FM signals to individual homes (or "subscribers"). The signals are sent via a distribution network of wires and line amplifiers. The wire, or cable portion of the system, can be likened to a telephone distribution set-up. The line amplifiers are used to boos ...

2) Secure frame to a base. 3) Wrap frame with four turns of the #22 insulated solid wire. 4) Twist wire ends together approximately 2 turns per inch. 5) Strip wire ends 1/2 inch and connect to AM terminals on back of TX-11b. Drawing A shows a completed antenna. Drawing B details connections for all 3 antennas. Don't be afraid to experiment to discover the best antenna for your location. _ — _ frame — — wire loop 17" base B Some Other Thoughts The bulk of this chapter has been devoted to explanations and comparisons of different antennas and antenna-system installation. We've provided information to help you make a deci ...

Charge Coupled FM Detector™* FM radio stations started life broadcasting a carrier frequency modulated by music. When you listen to "FM 108", what your tuner is receiving is that frequency —108 MHz (megahertz, or millions of cycles per second) — modulated by a music spectrum from 30 Hz to 15 kHz (KiloHertz, or thousands of cycles per second). The Federal Communication Commission ensures (by law and threat of fine) that the rock music on one station won't interfere with classics on the next. When radio stations came under pressure to deliver stereo sound, some system of broadcasting two sig ...

signal. An AM detector is absolutely insensitive to phase modulation. An FM detector, when properly constructed, is insensitive to amplitude modulation, so the phase detector picks out the L- R because it's phase modulated and ignores the L+R component. The output of each detector then is composed of an L+R signal and an L- R signal. Those two signals are combined in an appropriate matrix to produce a left and a right output. In addition to that there is a pilot tone that is broadcast at 25 Hz at 4% modulation to turn the stereo decoder on or off and light up an indicator light to let ...

ANTENNA TERMINALS: 75H coaxial input INTERMEDIATE FREQUENCY: 10.7 MHz FREQUENCY RESPONSE: 20 Hz to 15 kHz, ± 1 dB SELECTIVITY (At 400 Hz): 90 dB (narrow); 35 dB (wide) CAPTURE RATIO: 1.0 dB AM SUPRESSION RATIO: IMAGE RESPONSE RATIO: IF RESPONSE RATIO: SPURIOUS RESPONSE RATIO: 50dB;65dBwithCCD 110dB 110dB 100dB OUTPUT LEVEL (75 Hz deviation): 700 mV, 600H SYSTEM: PPL crystal-locked digital synthesizer USABLE SENSITIVITY 750: 50 dB QUIETING SENSITIVITY 75(1: SIGNAL/NOISE RATIO 75(1: STEREO SEPARATION (wide): MONO 16.1dBf/1.7>iV 82dB(a85dBf STEREO WITHOUT STEREO WITH CHARGE-COUPLED DETECTOR 34dBf/ ...