Icom IC-7800 Instruction Manual - Page 135
Antenna connection and selection
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10 ANTENNA TUNER OPERATION I Antenna connection and selection [ANT] The IC-7800 has 4 antenna connectors for the HF/50 MHz bands, [ANT1], [ANT2], [ANT3], and [ANT4]. For each operating band the IC-7800 covers, there is a band memory which can memorize a selected antenna. When you change the operating frequency beyond a band, the previously used antenna is automatically selected (see below) for the new band. This function allows automatic switching of 4 separate antennas for HF and 50 MHz bands operation. • Antenna selection mode: "Auto" 3.5/7 MHz 21/28 MHz 50 MHz RX bands bands bands only ANT 1 ANT 4 ANT 2 ANT 3 After an antenna has been selected for use (by pushing [ANT]), the antenna is automatically selected whenever that band is used. [EXAMPLE]: a 3.5/7 MHz antenna is connected to [ANT1], a 21/28 MHz antenna is connected to [ANT2], a 50 MHz antenna is connected to [ANT3]. When the antenna selector function is set to "Auto," an antenna is automatically selected when changing bands. [ANT4] can be used for receive only. • Antenna selection mode: "Manual" [ANT] When "Manual" is selected, you can use the all antenna connectors, [ANT1] [ANT2], [ANT3] and [ANT4], however, band memory does not function. In this case you must select an antenna manually. • Antenna selection mode: "OFF" In this case, only [ANT1] antenna connector can be used. [ANT] switch does not function. 10-2