Equipment information

Icom IC-761 Transceiver
Manufacturer:
Model:
IC-761
Date:
1988
Category:
Group:
Description:
HF All Band Transceiver General Coverage Receive

Information

■ COMPLETE HF Transceiver • BUILT-IN AUTOMATIC Antenna Tuner The IC-761 is equipped with an advanced HF Antenna Tuner system for quick, complete, and well matched Antenna performance. • FULL BREAK-IN FUNCTION Full break-in as well as semi break-in operation are provided for smooth, fast, and natural CW conversations. • BUILT-IN ELECTRONIC KEYER FUNCTION Automatic keying is possible in the IC-781 with the simple connection of an iambic paddle. The number of dots and dashes can be controlled by the operator with the result that CW operation is easier and more enjoyable. • BUILT-IN HIGH STABILITY CRYSTAL UNIT The IC-761 has a built-in high stability crystal unit which incorporates a temperature-compensating oven heater, resulting in a frequency stability of less than ±100Hz at — 10°C ~ +60°C. OUTSTANDING Receiver PERFORMANCE •GENERAL COVERAGE Receiver The IC-761 features general coverage receive capability with a tuning range from 100kHz to 30MHz. This wide range is accomplished by means of up-conversion using a high side IF and a CPU control system. •ICOM'S DFM SYSTEM The Icom DFM (Direct Feed Mixer) feeds the incoming signals directly into a high level first mixer developed by Icom. This advanced system produces a higher spurious response rejection ratio, a higher Receiver sensitivity and a wider dynamic range. • 105dB DYNAMIC RANGE The IC-761 has a 105dB dynamic range. Even with the PREAMP switched ON, the dynamic range is approximately 100dB. LARGE MEMORY CAPACITY CPU INSTALLED •32 MEMORIES Thirty-two programmable memories are provided to store mode and frequency, and the CPU is backed up by an internal lithium battery to maintain the memories for up to ten years. •ADVANCED REMOTE CONTROL SYSTEM Full communications using a personal computer equipped with an RS-232C jack are possible by using the serial port mounted on the rear panel of the IC-761. The computer controls frequency, mode, VFO A/B selection, and memories when an appropriate interface is used. The serial port uses a standard 1200bps data rate. •SCANNING VERSATILITY The IC-761 incorporates a total of four separate scanning functions for easy access to a wide range of frequencies.

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User Manual
Manual Type:
User Manual
Pages:
72
Size:
5.41 Mbytes (5674425 Bytes)
Language:
english
Revision:
Manual-ID:
A-0927
Date:
Quality:
Scanned document, all readable.
Upload date:
2014 01 26
MD5:
9b0e59f7342021ff4b12a104174f6452
Downloads:
954

Information

1. PRECAUTIONS AND PREPARATIONS ... 1 2. FEATURES ... 2 3. CONTROL FUNCTIONS ... 3 3 - 1 FRONT PANEL ... 6 3-2 FREQUENCY DISPLAY ... 15 3 -3 REAR PANEL ... 16 4. INSTALLATION ... 19 4-1 UNPACKING ... 19 4 - 2 PLANNING ... 19 4-3 Antenna ... 19 4-4 GROUNDING ... 19 4-5 REAR PANEL CONNECTIONS ... 20 5. SYSTEM INTERCONNECTIONS ... 21 5-1 EXTERNAL LINEAR Amplifier ... 21 5-2 EXTERNAL Antenna Tuner ... 22 5-3 RTTY TERMINAL UNIT ... 23 5-4 AFSK TERMINAL UNIT ... 23 5 - 5 SSTV UNIT ... 24 5-6 MIC CONNECTOR INFORMATION ... 24 5-7 ACCESSORY SOCKET INFORMATION ... 24 5-8 REMOTE CONTROL JACK (Cl-V) INFORMATION ... 26 6. GENERAL OPERATION ... 27 6-1 INITIAL SETTINGS ... 27 6-2 FREQUENCY SETTINGS ... 27 6-3 MODE SELECTION ... 28 6-4 SSB OPERATION ... 29 6-5 CW OPERATION ... 31 6-6 RTTY OPERATION ... 33 6-7 AM OPERATION ... 34 6-8 FM OPERATION ... 35 6-9 GENERAL COVERAGE Receiver ... 36 7. ANTENNA Tuner OPERATION ... 37 7-1 PRESETTINGS ... 37 7-2 AUTO-TUNING FAILS TO OPERATE ... 38 8. FUNCTIONS OPERATION ... 39 8- 1 RIT/ATX OPERATION ... 39 8- 2 FILTER SWITCH OPERATION ... 41 8- 3 MONITOR OPERATION ... 42 8- 4 PREAMP/ATT SWITCH OPERATION ... 42 8- 5 AGC SWITCH OPERATION ... 42 8- 6 SPEECH COMPRESSOR OPERATION ... 43 8- 7 NOISE BLANKER (NB) OPERATION ... 43 8- 8 VOX OPERATION ... 44 8- 9 PASSBAND/IF SHIFT OPERATION ... 45 8-10 NOTCH FILTER OPERATION ... 46 8-11 SWR READING ... 46 8-12 SPLIT (DUPLEX) OPERATION ... 47 9. MEMORY AND SCANNING OPERATION ... 48 9-1 MEMORY CHANNEL AND VFO SELECTION. . .48 9-2 PROGRAMMING MEMORY CHANNELS ... 49 9-3 MEMORY CLEARING ... 50 9-4 SCANNING OPERATION ... 51 10. CIRCUIT DESCRIPTION ... 53 10-1 R£CEIVER CIRCUITS ... 53 10-2 Transmitter CIRCUITS ... 54 10-3 Antenna Tuner ... 54 10-4 PLL CIRCUIT ... 55 11. MAINTENANCE AND ADJUSTMENTS ... 56 11-1 MAINTENAMCE ... 56 11-2 ADJUSTMENTS ... 57 12. OPTIONS INSTALLATIONS ... 59 12-1 IC-EX310 VOICE SYNTHESIZER UNIT ... 59 12-2 UT-30 PROGRAMMABLE TONE ENCODER UNIT ... 60 12-3 FILTERS ... ? ... 60 12-4 OPTIONS ... 62 13. INSIDE VIEWS ... 63 13 - 1 TOP VIEW (REGULATOR AND Tuner UNITS). . . 63 13-2 BOTTOM VIEW (MAIN AND RF UNITS) ... 64 14. BLOCK DIAGRAMS ... 65 15. SPECIFICATIONS ... 67 SCHEMATIC DIAGRAMS ... SEPARATE

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