User manual ICOM IC-746PRO

[. . . ] INSTRUCTION MANUAL HF/VHF ALL MODE TRANSCEIVER i746PRO 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. FOREWORD We understand that you have a choice of many different radios in the market place. We want to take a couple of moments of your time to thank you for making the IC-746PRO your radio of choice, and hope you agree with Icom's philosophy of "technology first". Many hours of research and development went into the design of your IC-746PRO. Rather than completely redesigning all areas to create a new radio, the engineering team at Icom decided to follow in the footsteps of the IC-746 (one of the best value transceivers in the marketplace) with the new "PRO. " Focused on real world improvements compiled over the last few years from letters, phone calls, EMails and newsgroup postings, the engineering team at Icom is proud to say "many of these changes were compiled from a list of suggestions from you, the amateur radio operator!" PRECAUTIONS R WARNING RF EXPOSURE! [. . . ] w Push [F5 SET] to select RTTY set mode. e Push [F1] or [F2 ] to select the desired set item. r Set the desired condition using the tuning dial. · Push [F3] for 1 sec. to select a default condition or value. RTTY 1 F1 F2 Mark 2125 F3 F4 F5 t Push [MENU] 2 times to return to M1. Set item up/down 1. RTTY Mark Sets the mark frequency for RTTY operation. · 1275, 1615 and 2125 Hz are selectable. RTTY 1 Mark 2125 2. RTTY Shift Sets the shift frequency for RTTY operation. · 170, 200 and 425 Hz are selectable. RTTY 2 Shift 17O 3. RTTY Keying Selects the keying polarity from normal and reverse. NORMAL Key open/close = Mark/Space REVERSE Key open/close = Space/Mark RTTY 3 Keying NORMAL 4. Decode USOS Turn the USOS (UnShift On Space) function ON/OFF ON OFF Decode as letter code Decode as character code Decode 4 USOS ON 5. Decode New Line Selects the new line code of the internal RTTY decoder. CR: Carriage Return; LF: Line Feed CR, LF, CR+LF CR+LF CR, LF and CR+LF CR+LF only Decode New Line 5 CR, LF, CR+LF 6. Decode Screen Selects the number of the decoder indication from 2 or 3 lines. Decode 6 Screen 3line 39 RECEIVE AND TRANSMIT 4 I Operating AM q Push a band key to select the desired band. e Rotate [AF] to set audio to a comfortable listening level. r Rotate the tuning dial to tune a desired signal. · S-meter indicates received signal strength. · The default tuning step for AM mode is 1 kHz; this can be changed using the tuning step program mode. 21) [TRANSMIT] [TX] indicator Band keys t Push [TRANSMIT] or [PTT] (microphone) to transmit. · The TX indicator lights red. [MIC GAIN] [AM/FM] Tuning dial Appears y Speak into the microphone at your normal voice level. · Adjust [MIC GAIN] at this step, if necessary. u Push [TRANSMIT] or release [PTT] (microphone) to return to receive. D Convenient functions for receive · Preamp and attenuator (p. 48) Push [P. AMP/ATT] several times to set the preamp OFF, preamp 1 ON or preamp 2 ON. · "P. AMP1, " "P. AMP2" or "P. AMP" appears when the preamp 1, preamp 2 or preamp is set to ON, respectively. (depending on operating frequency band) · Auto notch filter (p. 53) Push [A/NOTCH] to turn the auto or manual notch filter ON and OFF. · Rotate [NOTCH] control to set the attenuating frequency for manual notch operation. Push [P. AMP/ATT] for 1 sec. to set the attenuator ON. · Push [P. AMP/ATT] momentarily to turn the attenuator OFF. · "ATT" appears when the attenuator is set to ON. · IF shift (p. [. . . ] q* w e 0 0 X X X 100Hz digit: 0­2 *Not necessary when setting a frequency. D DTCS code and polarity setting The following data sequence is used when sending/reading the DTCS code and polarity setting. q X X 0 w X 10 Hz digit: 0­9 Transmit polarity: 0= Normal 1= Reverse Receive polarity: 0= Normal 1= Reverse 99 3rd digit: 0­7 1st digit: 0­7 Fixed digit: 0 0. 1 Hz digit: 0­9 X Fixed digit: 0* Fixed digit: 0* Direction: 00=+ direction 01=-- direction SPECIFICATIONS · General · Frequency coverage Receive Transmit : (Unit: MHz) 15 · Receiver · Receive system 0. 030­ 60. 000000* 108. 000­ 174. 000000* 1. 800­ 2. 000000 3. 500­ 3. 999999 7. 000­ 7. 300000 10. 100­ 10. 150000 14. 000­ 14. 350000 18. 068­ 18. 168000 21. 000­ 21. 450000 24. 890­ 24. 990000 28. 000­ 29. 700000 50. 000­ 54. 000000 144. 000­ 148. 000000 : USB, LSB, CW, RTTY, AM, FM : 102 (99 regular, 2 scan edges and 1 call) *Some frequency ranges are not guaranteed. · Mode · No. · Antenna connector : Triple conversion superheterodyne system · Intermediate frequencies: 1st 64. 455 MHz 2nd 455 kHz 3rd 36 kHz · Sensitivity (typical) : SSB, CW, RTTY 0. 16 µV*1 (1. 80­29. 99 MHz) (10 dB S/N) 0. 13 µV*2 (50 MHz) 0. 11 µV*3 (144 MHz) AM (10 dB S/N) 13 µV (0. 5­1. 799 MHz) 2 µV*1 (1. 80­29. 99 MHz) 1 µV (50*2/144*3 MHz) FM (12 dB SINAD) 0. 5 µV*1 (28. 0­29. 99 MHz) 0. 25 µV*2 (50 MHz) 0. 18 µV*3 (144 MHz) *1Pre-amp 1 is ON, *2Pre-amp 2 is ON, *3Pre-amp is ON · Squelch sensitivity (Pre-amp: OFF): : SO-239×3 (2 for HF/50 MHz and 1 for 144 MHz; 50 ) · Operating temp. range : ­10°C to +60°C ; +14°F to +140°F · Frequency stability : Less than ±7 ppm from 1 min. 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