User manual ICOM IC-781

[. . . ] A 4element system is employed for the 1st receive mixer, providing superior receive IMD, especially from in-band near-by interfering signals. A well-designed doubleconversion system to help minimize image and spurious responses for better signal fidelity, is also built-in. A newly designed PLL circuit has been adopted to improve C/N ratio characteristics. [. . . ] The combination of the 4-element system mixer and new PLL circuit allows superior basic performance as that of a commercial grade transceiver. *Guaranteed range: 0. 5­29. 999999 MHz RF gain control RF gain control is combined with the squelch control. The RF gain adjusts minimum response receiver gain, and ignores signals weaker than the pre-set level-- providing pleasant stand-by, or scanning. Ample CW features An electronic keyer with a variable dot/dash ratio (2. 8:1 to 4. 5:1) control is built-in. By simply connecting a paddle, easy CW operation can be made. The CW pitch and the key speed are also variable from 300­900 Hz, 6­60 wpm, respectively. Of course, full break-in capability is available with the adjustable break-in delay. The HF bands allow you distances covering many km world. With the superior perfo such as wide dynamic range operation you will find ma Experience the combination technology, along with the s You will see the IC-781 will b will ever own. Optional DSP capability With the optional UT-106 installed you gain AF DSP capabilities. The DSP includes the following to give you superior receive quality in your shack, vehicle or during DX'pedition. Temperature fluctuations 0°C to +50°C (+32°F to +122°F) less than ±350 Hz · Power supply requirement : 13. 8 V DC ±15 % (negative ground) · Current drain (at 13. 8 V DC): Receive Stand-by 1. 3 A max. range : ­10°C to +60°C; +14°F to +140°F · Mode · No. · Frequency resolution · Frequency stability : Double-conversion superheterodyne : 0. 16µV (1. 8­29. 999999 MHz) 13 µV (0. 5­1. 799999 MHz) 2 µV (1. 8­29. 999999 MHz) : Less than 5. 6 µV (SSB) : More than 2. 1 kHz/­6 dB Less than 4. 5 kHz/­60 dB More than 6. 0 kHz/­6 dB Less than 20 kHz/­40 dB : More than 70 dB (1. 8­29. 999999 MHz) : More than 2. 0 W at 10% distortion with an 8 load output power *spurious freq. ; below 30 MHz: ­50 dB, above 30 MHz: ­60 dB · Carrier suppression · Unwanted sideband · Microphone connector · KEY connector · SEND connector · ALC connector : More than 40 dB : More than 50 dB : 8-pin connector (600 ) : 3-conductor 6. 5 (d) mm (1/4) : Phono (RCA) : Phono (RCA) · RIT variable range · PHONES connector · EXT SP connector Supplied accessories: · Hand microphone · Spare fuses : ±1200 Hz : 3-conductor 6. 5 (d) mm (1/4) : 2-conductor 3. 5 (d) mm (1/8) /8 · DC power cable All stated specifications are typical and subject to change without notice or obligations. OPTIONS AH-2b ANTENNA ELEMENT IC-PW1 HF+50 MHz 1 kW HF LINEAR AMPLIFIER Covers all HF and 50 MHz bands, provides clean, stable 1 kW output. Automatic antenna tuner and compact detachable controller are standard. (An optional OPC-599 is required. ) For mobile operation with the AH4. All bands between 7­30 MHz can be matched. AH-4 HF+50 MHz AUTOMATIC ANTENNA TUNER Covers 3. 5­30 MHz with a 7 m (23 ft) or longer wire antenna. AT-180 AUTOMATIC ANTENNA TUNER Compact, light weight antenna tuner. PS-85 DC POWER SUPPLY Output: 13. 8 V DC (20 A max. ) SM-20 DESKTOP MICROPHONE High quality desktop microphone. Includes. [UP]/[DOWN] switches and low cut function. SM-8 DESKTOP MICROPHONE Equipped with 2 connection cables. [. . . ] All bands between 7­30 MHz can be matched. AH-4 HF+50 MHz AUTOMATIC ANTENNA TUNER Covers 3. 5­30 MHz with a 7 m (23 ft) or longer wire antenna. AT-180 AUTOMATIC ANTENNA TUNER Compact, light weight antenna tuner. PS-85 DC POWER SUPPLY Output: 13. 8 V DC (20 A max. ) SM-20 DESKTOP MICROPHONE High quality desktop microphone. Includes. [UP]/[DOWN] switches and low cut function. SM-8 DESKTOP MICROPHONE Equipped with 2 connection cables. [UP]/[DOWN] switches are included. SM-6 DESKTOP MICROPHONE Electret condenser-type desktop microphone. HM-36 HAND MICROPHONE Same as that supplied. CT-17 CI-V LEVEL CONVERTER For remote transceiver control from a PC equipped with an RS232C port. CR-338 HIGH STABILITY CRYSTAL UNIT Contains a temp. [. . . ]