User manual ICOM AT-120

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ICOM AT-120 : Download the complete user guide (1950 Ko)

Manual abstract: user guide ICOM AT-120

Detailed instructions for use are in the User's Guide.

[. . . ] HF operation on any size ship The AT-120 allows you HF operation where antenna element length is restricted due to space. Weather resistant The AT-120 is housed in a durable, completely weather resistant ASA case with a rubber gasket. The antenna tuner can be conveniently installed both on the deck or in the cabin near the antenna element. 45 memories for shorter tuning time To decrease the tune-up time, the AT-120 automatically stores the matching conditions for up to 45 frequencies. [. . . ] 45 memories for shorter tuning time To decrease the tune-up time, the AT-120 automatically stores the matching conditions for up to 45 frequencies. Super capacitor for memory backup Even if the AT-120 is not used for approx. 1 week, the built-in super capacitor backs up contents of the 45 memories. This feature reduces the possibility of causing interference to other stations. Tuner through function The tuner through function is built into the AT-120. This function helps improve receiver gain, depending on the antenna element length used, and operating frequency. TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 ii 1 ANTENNA SYSTEM I Antenna for ship Required antenna element length Required antenna element length to achieve full performance varies according to the lowest frequency: The lowest frequency Required antenna element length 1. 6 MHz band 4 MHz band 7 m; 23. 0 feet or longer 3 m; 9. 8 feet or longer Backstay operates as a long-wire antenna. Insulator The longer the antenna element, the better the antenna efficiency. Undesirable antenna element lengths AVOID multiples of 1/2 (half wavelength) for antenna element lengths, since tuning becomes difficult. L : Antenna element length to be avoided [m] f : Operating frequency [MHz] n : Natural number (n = 1, 2, 3, . . . ) L= 300 1 × ×n 2 f Insulator Whip antenna [Example] At an operating frequency of 16 MHz, avoid the following antenna element lengths: L= 1m 300 1 × ×n 2 16 39 inches 9. 4, 18. 8, . . . For example, if 15 m is selected for an antenna element length, you have no problem in the 1. 6­25 MHz marine bands range. NOTE: Keep antennas as far away from other objects as possible, especially metal objects. 1 ANTENNA SYSTEM 1 I Coaxial cable Insulate the lead-in cable of the AT-120 antenna terminal and antenna element from other metal objects. To prevent interference, keep cables as far as possible from an antenna, electric pump and other electronic equipment. To prevent erroneous indications, keep cables as far away as possible from the flux gate compass. 2 "Ground and counterpoise. " e Mount the AT-120 in the desired location. · Refer to p. 4 "Mounting. " I Control cable Between the AT-120 and HF marine transceiver, connect 4 control signal lines as shown below. D When connecting to Icom IC-M801E Use the optional OPC-1465, or assemble the desired length 4-conductor shielded cable and the connector kits supplied with the transceiver and the tuner. OPC-1465 : for IC-M801E Refer to p. 6 "Terminal information" for details. To transceiver [ANTC] [13. 6] [STAR] [KEY] : : : : Black Red White Green To AT-120 [ANTC] [13. 6] [STAR] [KEY] : : : : Black Red White Green [GND] [GND] 3 INSTALLATIONS 2 I PL-259 connector q Slide the coupling ring over the coaxial cable. Strip the cable jacket and pull back to reveal 10 mm of braid. · Soft solder the exposed braid and then pull out the jacket. Coupling 30 mm e Slide the connector body over the cable and solder as shown below. Solder Solder r Screw the coupling ring onto the connector body. 10 mm (soft solder) w Strip the cable as shown below. Soft solder the center conductor the entire length of the exposed braid. 10 mm 10 mm 3/8 1­2 mm soft solder inches I Mounting Attach the AT-120 either horizontally or vertically with one of the water drains facing downwards. After mounting, remove the screw in the water drain. Mounting on a flat surface Using nuts and bolts Using self-tapping screws Mounting on a Mast/Metal pole Mast/ Using Metal pole U-bolt U-bolt plate Flat washer(L) Spring washer Flat washer(S) Nut Nut Flat washer(S) Spring washer Flat washer(L) U-bolts WARNING: Mount the AT-120 securely with the supplied nuts and bolts. could loosen the antenna tuner making if fall, causing personal injury. Flat washer(L) Hex head bolt Weatherproof cap Drill a hole here Diameter:7­8 mm; 9/32­5/16 inches 4 2 INSTALLATIONS I Cable connections q Connect the coaxial cable and the control cable to the AT-120 as illustrated below. w Cover both the antenna and the control cable connectors with rubber vulcanizing tape and fix it with a vinyl tape to prevent water seeping into the connector. [. . . ] After mounting, remove the screw in the water drain. Mounting on a flat surface Using nuts and bolts Using self-tapping screws Mounting on a Mast/Metal pole Mast/ Using Metal pole U-bolt U-bolt plate Flat washer(L) Spring washer Flat washer(S) Nut Nut Flat washer(S) Spring washer Flat washer(L) U-bolts WARNING: Mount the AT-120 securely with the supplied nuts and bolts. could loosen the antenna tuner making if fall, causing personal injury. Flat washer(L) Hex head bolt Weatherproof cap Drill a hole here Diameter:7­8 mm; 9/32­5/16 inches 4 2 INSTALLATIONS I Cable connections q Connect the coaxial cable and the control cable to the AT-120 as illustrated below. w Cover both the antenna and the control cable connectors with rubber vulcanizing tape and fix it with a vinyl tape to prevent water seeping into the connector. r Connect the coaxial cable and the control cable to the transceiver as illustrated below. [. . . ]

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