User manual ICOM IC-78

[. . . ] INSTRUCTION MANUAL HF TRANSCEIVER i78 This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. IMPORTANT READ THIS INSTRUCTION MANUAL CAREFULLY before attempting to operate the transceiver. EXPLICIT DEFINITIONS DEFINITION Personal injury, fire hazard or electric R WARNING shock may occur. CAUTION NOTE Equipment damage may occur. No risk of per of personal injury, fire or electric shock. [. . . ] · See the connected antenna tuner's instruction manual for installation and antenna connection details. · Setting example: For mobile operation Optional AH-2b antenna element TUNER OPERATION Tuning is required for each frequency. Be sure to re-tune the antenna before transmitting when you change the frequency-- even slightly. w Enter initial set mode. · Turn power ON while pushing and holding [SET]. e Push [UP Y] or [Z DN] to select [TUNER]. r Selects connected antenna tuner type by rotating the channel selector. · no ·4 · 12 · 13 : no antenna tuner is selected. : AT-130 is selected. For outdoor operation Long wire AT-120 AT-130 AH-4 y Push [PWR] for 1 sec. · MANUAL TUNING q Set the desired channel. w Push [TUNER] to start tuning. ·" " blinks and "CW" appears while tuning. IC-718 MODE FILTER TS V/M 1 MW 4 SPL 7 NR. A=B 2 M=CL 5 SCN 8 ANF 0 A/B 3 MV 6 VOX 9 F-INP ENT MIC PWR AF SQL RIT SHIFT NB P. AMP LOCK CH COMP ATT SET TUNER PHONES DN UP R WARNING: HIGH VOLTAGE! NEVER touch the antenna element while tuning or transmitting. NEVER operate the AT-120, AT-130 or AH-4 without an antenna wire. The tuner and transceiver will be damaged. NEVER operate the AT-120, AT-130 or AH-4 when it is ungrounded. Transmitting before tuning may damage the transceiver. Note that the AT-120, AT-130 or AH-4 cannot tune when using a 1/2 long wire or multiple of the operating frequency. [TUNER] switch e" " lights constantly when tuning is completed. (except when AT-120 is connected; the indicator goes out) · When the connected wire cannot be tuned, the " " goes out, the antenna tuner is bypassed and the antenna wire is connected to the antenna connector on Tuning indicator; Blinks: While tuning Appears: Tune is completed Disappears: Tune is not completed (When AT-120 is connected, the indicator disappears even when tuned completely. ) the transceiver directly. r To bypass the antenna tuner manually, push [TUNER]. (AH-4 only; starts tuning again when AT120 or AT-130 is connected) 18 OPERATION 4 s Functions for receive ï RIT function The RIT (Receive Incremental Tuning) function compensates for off-frequencies of communicating stations. The function shifts the receive frequency up to 1. 2 KHz without moving the transmit frequency. q Rotate the RIT control to cancel the off-frequencies. ·" " appears on the display. · The transmit frequencies are not shifted. w To cancel the RIT function, rotate the RIT control to the center position. ·" " disappears. RIT off position ï Preamp The preamp amplifies received signals in the front end circuit to improve the S/N ratio and sensitivity. Turn this function ON when receiving weak signals. ¯ Push [P. AMP] to turn the the preamp ON and OFF. · Preamp functions below 1. 6 MHz, but sensitivity may be reduced in some cases. Appears when the preamp is ON. ï Attenuator The attenuator prevents desired signals from distorting when very strong signals are near the desired frequency or when very strong electric fields, such as from broadcasting stations, are near your location. ¯ Push [ATT] to turn the 20 dB attenuator function ON and OFF. · "ATT" appears when the attenuator is turned ON. [. . . ] Temperature fluctuations 0°C to +50°C (+32°F to +122°F) less than ±350 Hz · Power supply requirement (negative ground) 13. 8 V DC ±15 % · 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 · Antenna connector : SO-239 (50 ) · Dimensions : 240(W)×95(H)×239(D) mm (projections not included) 97/16(W)×33/4(H)×913/32(D) in · Weight (approx. ) : 3. 8 kg; 8 lb 6 oz · ACC connector : 13-pin · Carrier suppression : More than 40 dB · Unwanted sideband : More than 50 dB · Microphone connector : 8-pin connector (600 ) s RECEIVER : Double-conversion superheterodyne · Sensitivity (10 dB S/N) : SSB, CW, RTTY 0. 16 µV (1. 600­29. 999999 MHz) AM (0. 5 µV at 12 dB SINAD) 13 µV (0. 5­1. 599999 MHz) 2 µV (1. 600­29. 999999 MHz) · Receiver system · Selectivity : SSB, CW, RTTY More than 2. 1 kHz/­6 dB Less than 4. 5 kHz/­60 dB AM More than 6. 0 kHz/­6 dB Less than 20 kHz/­40 dB · Spurious and image rejection ratio: (1. 600­29. 999999 MHz) More than 70 dB · Audio output power : More than 2. 0 W at 10% (at 13. 8 V DC) distortion with an 8 load · RIT variable range · PHONES connector · Ext. SP connector : ±1200 Hz : 3-conductor 6. 5 (d) mm (1/4) : 2-conductor 3. 5 (d) mm (1/8) /8 All stated specifications are typical and subject to change without notice or obligation. 43 11 OPTIONS AT-130/E AUTOMATIC ANTENNA TUNER AH-4 AUTOMATIC ANTENNA TUNER PS-85 DC POWER SUPPLY Light weight switching regulator system power supply. · Output voltage: 13. 8 V DC · Max. [. . . ]