User manual ICOM IC-281H

[. . . ] AVOID using or placing the transceiver in areas with temperatures below ­20°C (­4°F) or above +60°C (+140°F). AVOID connecting the transceiver to a power source using reverse polarity. This connection will not only blow fuses but may also damage the transceiver. AVOID placing the transceiver in excessively dusty environments or in direct sunlight. [. . . ] Use VFO mode to select frequencies around the preprogrammed channels in memory mode.  NOTE: Frequencies selected in VFO mode are for temporary use and are not stored in memory. While in memory mode, rotate the [GROUP] and [CHANNEL] selectors to select the channel nearest the frequency you want. Push [CH/FREQ] to select VFO mode. SIMP Rotate [CHANNEL] SQL Rotate the [CHANNEL] selector to select the desired frequency. · Frequency changes in 100 Hz steps. 1. 6001 MHz selected SIMP · "FREQ" appears. 1. 6 MHz selected SQL to select a frequency in 0. 1 kHz steps 6 SELECTING A CHANNEL 3 I Resetting the CPU Under some circumstances the transceiver's internal CPU may cause erroneous indications on the display. If this happens, reset the CPU as follows: While pushing [ENT] + [0], push [POWER] to turn power on. · The CPU is reset and the display at right appears. RX SIMP Group A, channel 1 is selected after resetting the CPU.  CAUTION: Resetting the CPU returns set mode contents to their default values. 7 4 RECEIVE AND TRANSMIT Select the desired channel to be received with the [GROUP] and [CHANNEL] selectors. · When receiving a signal, the S-meter shows the signal strength. I Basic voice receive and transmit Check the following in advance: Microphone is connected. Memory mode is selected. · Push [CH/FREQ] to select memory mode, if necessary. Adjust [VOLUME] to the desired audio level when receiving a signal. nected. Push [MODE] to select the desired operating mode, Push [TUNE] to tune the antenna tuner, if con· This operation is not necessary when "automatic tuning" is selected in set mode (p. 11). To transmit on the channel, push and hold the PTT switch on the microphone. · "TUNE" flashes for 1 to 2 sec. for the first transmission on a channel when an antenna tuner is connected. After the flashing stops, speak into the microphone microphone connector [SPEAKER] [SQL] at your normal voice level. [CLARITY] Release the PTT switch to return to receive. · The RF meter shows the output power according to your voice level. I Functions for transmit D Transmit frequency check When "DUP" appears on the display such as for a ship-to-shore channel, the transmit frequency differs from the receive frequency. In such cases, the transmit frequency should be monitored before transmitting to prevent interference to other stations. Push and hold [TX FREQ] to monitor the transmit frequency. TX FREQ · The display shows the transmit frequency. 8 RECEIVE AND TRANSMIT 4 I Functions for receive D Squelch function The squelch function detects signals with voice components and squelches (mutes) unwanted signals such as unmodulated beat signals. When you need to receive weak signals, the squelch should be turned off. 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 (7) FSK polarity Normal and reverse polarities are available for FSK operation. "FK-REV off" (normal): key open (mark); key close (space) "FK-REV on" (reverse): key open (space); key close (mark) FSK normal (default) FSK reverse (8) 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 12 SET MODE 5 (9) LCD contrast The LCD contrast can be adjusted through 10 levels to suit transceiver mounting angle, location and ambient lighting. Lowest contrast (default: 7) Highest contrast (10) ID number setting for remote control When connecting an external controller such as a personal computer, 2-digit ID codes are required to access the transceiver. The IC-281H adopts NMEA0183 format and uses a "proprietary sentence" for remote control. NMEA ID: 1 (default: 2) NMEA ID: 99 (11) Remote control input terminal Remote control signals can be input via the [REMOTE] socket or [CLONE] jack. [REMOTE] socket (default) [CLONE] jack (12) Display backlighting Allows you to select 1 of 4 intensity levels for the display backlighting. Dimmest (default) Brightest (13) Group A channel inhibit This item allow you to set the number of usable channels in channel group A, up to a maximum of 50 channels. Minimum number of channels set for Group A: 1 Maximum number of channels set for Group A: 50 (default) 13 5 SET MODE (14) Group B channel inhibit This item allow you to set the number of usable channels in channel group B, up to a maximum of 50 channels. Minimum number of channels set for Group B: 1 Maximum number of channels set for Group B: 50 (default) (15) Group C channel inhibit This item allow you to set the number of usable channels in channel group C, up to a maximum of 50 channels. Minimum number of channels set for Group C: 1 Maximum number of channels set for Group C: 50 (default) 14 CONNECTIONS AND INSTALLATION I Connections on rear panel e o 6 q u w r t y i External speaker Optional AT-130 12 V battery q ANTENNA CONNECTOR (p. 19) Connects a 50 HF band antenna with a 50 matched coaxial cable and a PL-259 plug. y EXTERNAL SPEAKER JACK Connects a 4­16 external speaker using a 1/4" monaural plug. This external audio is not muted by the [SPEAKER] switch on the front panel. u TUNER RECEPTACLE Connects a control cable to an optional AT-130 ANTENNA TUNER. i DC POWER RECEPTACLE Connects to a regulated 12­16 V DC power source such as a 12 V battery or DC power supply using the supplied DC power cable. R CAUTION: DO NOT connect to a 24 V battery. This will damage the transceiver. Replace both fuses when one fuse is blown. I Unpacking Microphone (EM-101) . 2 15 6 CONNECTIONS AND INSTALLATION I Connector information ACC(1) DESCRIPTION PIN PIN NAME 1 CWK CW and FSK keying input. [. . . ] RCAUTION: KEEP the transceiver and microphone at least 1 meter away from your vessel's magnetic navigation compass. Check the installation angle; the display may not be easy to read at some angles. Spring washer Flat washers Nuts (Use two nuts to prevent loosening. ) D Transceiver dimensions 350 (1325/32) 312. 5 (125/ 16) 280 (11) 290 (117/16) 143 (55/8) 115 (41/2) 58 (29/32) 67 (25/8) 93. 5 (3 152 (6) 11/16) 100 (315/16) Unit : mm (inchs) 170 (611/16) 20 CONNECTIONS AND INSTALLATION 6 I Installing internal options D Opening the case Follow the case and cover opening procedures shown here when you want to install an option or adjust a setting for non-Icom tuner control. Front sealing Rear sealing Remove the 9 screws from the rear panel, then re Remove the transceiver case. When reassembling the transceiver, check the following points: Internal fan and slits in the case are on the same side. move the rear frame and rear sealing. Rear frame D Installing an optional filter and alarm unit After opening the case as shown above, install the desired option to the position as at right. [. . . ]