User manual ICOM IC-706

[. . . ] This may result in an electric shock or burn. AVOID placing the transceiver against walls or putting anything on top of the transceiver. During mobile operation, DO NOT operate the transceiver without running the vehicle's engine. When transceiver power is ON and your vehicle's engine is OFF, the vehicle's battery will soon become exhausted. [. . . ] to turn the AGC function OFF. · AGC should normally be set to AGC fast for CW and RTTY operation and to AGC slow for SSB and AM operation. · Turn AGC OFF when receiving a very weak signal near a strong signal. 1 1. 5 2 3 P. AMP 1 AGC OFF FS M1 AGC DUP CMP TCN SCP F1 F2 F3 F4 F5 NOTE: When the AGC function is turned OFF, the S-meter does not function. Toggles AGC ON/OFF AGC indicators 5-5 1/4 function 1 ANT CW 1 4 When the 1/4 function is ON, one complete rotation of the tuning dial changes the frequency by 1. 25 kHz (normally one rotation changes the frequency by 5 kHz). This is convenient when critical setting is required and is only available in CW and RTTY modes. S Po ALC SWR 1 3 20 5 7 9 50 20 40 60 100% Push [CW/RTTY] to select CW or RTTY mode. While menu set 1 is selected, push [F3](1/4) to BLANK VFOA CH toggle the 1/4 function ON and OFF. · When the function is ON, "1/4" appears in the function display. · This can be set independently for CW and RTTY modes. · When the TS function is turned ON, the TS function has priority. 1 1. 5 2 3 P. AMP 1 AGC F M1 AGC DUP 1/4 KEY SCP F1 F2 F3 F4 F5 1/4 function ON/OFF 1/4 function indicator 5-6 NB function The noise blanker reduces pulse-type noise such as that generated by automobile ignition systems. This function is not effective for AM and FM, or non pulsetype noise. Push [NB] to toggle the noise blanker function ON and OFF. · When the noise blanker function is turned ON in AM mode and a strong signal is received, audio may distort. In this case turn the function OFF. [NB] 39 5 FUNCTIONS FOR RECEIVE 5-7 Noise reduction [NR] DSP The noise reduction function reduces noise components and picks out desired signals which are buried in noise. to select VOX program mode. s ADJUSTING THE VOX GAIN VOX VOX Gain 50% F1 F2 F3 F4 F5 Push [F1] or [F2] to select VOX Gain. While speaking into the microphone, rotate the tuning dial to the point where the transceiver is continuously transmitting. · Be careful that sounds other than your voice are not affecting this setting. Push [MENU] or [VOX/BK-IN] to return to menu set 1. Sets item up/down s ADJUSTING THE ANTI-VOX VOX Anti VOX 50% F1 F2 F3 F4 F5 Push [F1] or [F2] to select Anti VOX. While speaking into the microphone, rotate the tuning dial to obtain the most readable signal. Push [MENU] or [VOX/BK-IN] to return to menu set 1. Sets item up/down s ADJUSTING THE VOX DELAY VOX VOX Delay 0. 2s F1 F2 F3 F4 F5 Push [F1] or [F2] to select VOX Delay. Rotate the tuning dial (and speak into the microphone) to obtain a suitable interval for returning to receive after transmitting. Push [MENU] or [VOX/BK-IN] to return to menu set 1. Sets item up/down 43 6 FUNCTIONS FOR TRANSMIT 6-2 Break-in function The break-in function is used in CW mode to automatically toggle the transceiver between transmit and receive when keying. The IC-706 is capable for full break-in or semi break-in. [KEY SPEED] [VOX/BK-IN] Tuning dial Å SEMI BREAK-IN OPERATION 1 ANT CW During semi break-in operation, the transceiver selects transceive when keying, then automatically returns to receive after a pre-set time from when you stop keying. S Po ALC SWR 1 3 20 5 7 9 50 20 40 60 100% BLANK Push [CW/RTTY] to select CW or CW-R mode. Push [VOX/BK-IN] one or more times to select semi break-in operation. CH VFOA 1 1. 5 2 3 · "BK-IN" appears when semi break-in is selected. BK IN P. AMP 1 AGC FS Set the break-in delay time (the delay from transmit to receive). Rotate the tuning dial to select the desired delay. Push [MENU] or [VOX/BK-IN] to return to menu set 1. BRK Break-IN Delay 7. 5d Break-in indicator NOTE: When using a paddle, rotate [KEY SPEED] to adjust the keying speed. i FULL BREAK-IN OPERATION 1 ANT CW During full break-in operation, the transceiver automatically selects receive if a signal is detected while keying. Push [CW/RTTY] to select CW or CW-R mode. Push [VOX/BK-IN] one or more times to select full S Po ALC SWR 1 3 20 5 7 9 50 20 40 60 100% BLANK break-in operation. · "OBK-IN" appears when full break-in is selected. CH VFOA 1 1. 5 2 3 NOTE: When using a paddle, rotate [KEY SPEED] to adjust the keying speed. F BK IN P. [. . . ] of memory ch · Antenna connector : USB, LSB, CW, RTTY, AM, FM : 102 (99 regular, 2 scan edges and 1 call) · Selectivity : USB, LSB, CW, RTTY More than 2. 1 kHz/­6 dB Less than 4. 0 kHz/­60 dB AM, FM-N More than 9. 0 kHz/­6 dB Less than 20. 0 kHz/­40 dB FM More than 12 kHz/­6 dB Less than 30 kHz/­50 dB · Squelch sensitivity : USB, LSB, CW, RTTY Less than 5. 6 µV FM Less than 1. 0 µV · Spurious and image rejection ration: (except IF through on 50 MHz) : SO-239×3 (2 for HF/50 MHz and 1 for 144 MHz; 50 ) : ­10°C to 60°C (14°F to 140°F) · Usable temp. range · Frequency stability : Less than ±7 ppm from 1 min. After that, rate of stability is less than ±1 ppm/hr. Temperature fluctuations 0°C to +50°C (+20°F to +122°F) less than ±5 ppm. · Frequency resolution · Power supply requirement · Current drain Transmit Receive · Dimensions · Weight · CI-V connector : 1 Hz 13. 8 V DC±15% (negative ground) : max. [. . . ]