User manual ICOM IC-M120

[. . . ] WORD  NOTE: The IC-M120GMDSS version has a high-stability crystal oscillator unit. This unit draws a slight current even when power to the transceiver is OFF. To prevent battery exhaustion when docking your vessel for extended periods, unplug the DC cable from the DC power receptacle. PRECAUTIONS RWARNING!NEVER connect the transceiver to an AC outlet directly. [. . . ] keyer to the ACC(1) socket as shown at right. CW key 425 1 3 8 6 7 ACC(1) socket pin 2  NOTE: CW mode is not available in some versions and CW narrow can be selected in set mode (p. 14) when an optional filter is installed (already built-in to the GMDSS versions). pin 1 I FSK operation The transceiver has FSK and J2B modes for FSK operation--use FSK when using the built-in oscillator; use J2B when using an AFSK terminal unit. FSK terminal unit connection Connect an FSK terminal unit as shown at right. Push [MODE] one or more times to select the type of emission, "FSK" or "J2B. " Operate the FSK terminal unit. · FSK ITU channel group, ch 4001 to ch 25040, are available depending on version. pin 4 pins 2, 5 pin 3 FSK keying AF input Tx/Rx control Ground FSK terminal unit  NOTE: FSK shift frequency and FSK polarity can be adjusted in set mode (p. Some transceivers my operate 1. 7 kHz higher than the IC-M120's J2B mode even when the same displayed frequencies are in use. 425 1 3 8 6 7 ACC(1) socket I Cross channel operation* Cross channel operation is available with some versions to operate different channels for receive and transmit. Cross channel operation example ALM RX TX DSC DUP Select the desired channel for receive. Push [TX], then select the desired channel for transmit. · ITU simplex channels cannot be used. AGC F 2 3 4 A 0 1 While receiving ALM RX TX DSC Push [TX] again to stop the blinking. Change the channel to clear the cross channel setting. *This function is available for Europe versions only. · "$" flashes after pushing [TX]. DUP AGC F 2 3 4 A 0 1 While transmitting 11 5 USER CHANNEL PROGRAMMING I Programming a frequency The IC-M120 has up to 160 user-programmable channels each with channel name capability of up to 7 alphanumeric characters.  NOTE: ITU simplex channels can be programmed as well as user channels. However, transmit frequencies cannot be programmed as it is not necessary. D Receive frequency Select the desired channel to be programmed. Push [CE] to select frequency selection mode. Enter the desired frequency via the keypad--5 or 6 digits. · "s" and frequency appear on the display. · Channels 1 to 160 (maximum) are programmable. Push [CE] ALM RX TX DSC DUP AGC F Frequency and "" appear. Channel resume scan Scan operates over the frequency range. (optional) (5) Scan speed This item adjusts the scan speed (rate at which channels are searched). The scan speed can be set from 1 to 10 with "1" being the fastest and "10" being the slowest. ALM RX AGC TX DSC F Fastest scan speed (default: 4) ALM RX AGC TX DSC F Slowest scan speed (6) Channel name and frequency The lower half of the display can be set to display a programmable channel name or a receive frequency according to operator needs. Channel number and channel name --alphanumeric (default) Channel number and frequency (7) CW/FSK narrow filter This item selects the passband width for A1A (CW), FSK or J2B mode. ALM RX AGC TX DSC F Passband: 2. 3 kHz/­6 dB (default) NOTE: When "on" is selected without optional filter installation, the Marine and General versions do not function in these modes. The GMDSS versions can use "on" as standard. ALM RX AGC TX DSC F Passband: 500 Hz/­6 dB (Gene/Marine) 350 Hz/­6 dB (GMDSS) (8) FSK shift frequency Several shift frequencies (the difference between the mark and space frequency) are used for FSK operation. This item allows you to select a shift frequency for almost any FSK system. Shift frequency: 170 Hz (default) Shift frequency: 425 Hz Shift frequency: 850 Hz 14 SET MODE 6 (9) FSK polarity Normal and reverse polarities are available for FSK operation. This item allows you to select one of these polarities. "FSK-REV off" (normal): key open (mark); key close (space) "FSK-REV on" (reverse): key open (space); key close (mark) FSK normal (default) FSK reverse (10) CW break-in The CW break-in function (in A1A mode) toggles transmit and receive with CW keying. Full break-in allows you to receive signals between transmitted keying pulses during CW transmission. Semi break-in allows you to mute receiving until keying stops with some delay time. Full break-in Automatic keying without delay time (default) Semi break-in Automatic keying with delay time OFF Manual transmission necessary for keying (11) Microphone keys This item activates/deactivates the keys on the HM120 HAND MICROPHONE ("P", "Y" and "Z"). 4 to program the "P" key. ALM RX AGC TX DSC F Microphone keys activated. (default) ALM RX AGC TX DSC F Microphone keys deactivated. (12) Remote control busy timer This sets the time for which operation of one remote controller is inhibited while operating the other. [. . . ] *2The output power of GMDSS versions is provided by the AT-130/E antenna tuner. · Spurious emissions: ­65 dB (USA); ­60 dB (Europe) · Carrier suppression: 40 dB · Unwanted sideband suppression: 55 dB · Microphone impedance: 600 RECEIVER · Sensitivity J3E, R3E, J2B, A1A, F1B (for 12 dB SINAD) : 6. 3 µV (0. 5­1. 5999 MHz) 1. 0 µV (1. 6­1. 7999 MHz) 0. 5 µV (1. 8­29. 9999 MHz) H3E 32 µV (0. 5­1. 5999 MHz) 6. 3 µV (1. 6­1. 7999 MHz) 3. 2 µV (1. 8­19. 9999 MHz) · Spurious response rejection ration: (1. 6­29. 9999 MHz) More than 70 dB · Audio output power: 4. 5 W (at 10% distortion with (for 10 dB S/N) Main unit Controller · Weight: Main unit Controller 292(W)×117(H)×317(D) mm 111/2(W)×419/32(H)×1215/16(D) in 292(W)×116(H)×66(D) mm 111/2(W)×49/16(H)×219/32(D) in 7. 45 kg; 16 lb 7 oz (negative ground) (7. 65 kg; 16 lb 14 oz GMDSS version) 1. 2 kg; 2 lb 12 oz · Audio output impedance: 4 to 8 · Clarity variable range: ±150 Hz a 4 load) All stated specifications are subject to change without notice or obligation. I Options GM-110DSC DSC TERMINAL UNIT 6 channel emergency scanning receiver for distress calls, selective calls, etc. AT-130/E AUTOMATIC ANTENNA TUNER Matches the transceiver to a long wire antenna with a minimum of insertion loss. OPC-566 SHIELDED CONTROL CABLE Shielded control canble helps protect the transceiver from RF feedback and extends separation between tuner and transceiver up to 10 m. [. . . ]