Icom IC-7100 Advanced Instructions - Page 306
Operating, For the HF band
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Previous view 16 ANTENNA TUNER OPERATION Operating the AT-180 (Continued) DDOperating The AT-180 automatic antenna tuner automatically matches to your antenna. Once the tuner matches the antenna, the variable capacitor settings are memorized as a preset point for each frequency range (100 kHz steps). Therefore, when you change the frequency range, the variable capacitors are automatically preset to the memorized point. NOTE: • T he AT-180 can match both the HF and 50 MHz bands. However, operation is different for the bands. • W hen connecting the AT-180, the transceiver's output power should be more than 8 W. Otherwise, the AT-180 may not tune correctly. The AT-180's minimum operating input power is 8 W. qqCheck the transceiver's output power is set to 8 W. wwPush TUNER/CALL (L) to turn ON the AT-180. • " " appears. For the HF band: The antenna is automatically tuned during transmit if the antenna SWR is higher than 1.5:1. For the 50 MHz band: " " blinks if the antenna SWR is higher than 1.5:1, regardless of the internal switch position de- scribed on the page 16-7. In this case, do the step e to manually tune the antenna. • If you continue to transmit without retuning, " " goes out after approximately 10 seconds, the AT-180 is by- passed and the antenna is directly connected. eePush TUNER/CALL (L) for 1 second to start manual tuning. • W hile tuning, the transceiver transmits in the CW mode and " " blinks. NOTE: DO NOT change the frequency and oper- ating mode while " " is blinking. rr" " is still ON after the tuning is completed, and the previously selected operating mode is automati- cally selected. • W hen the connected wire cannot be tuned, " " goes out, the AT-180 is bypassed and the antenna is directly connected. Once the tuner matches the antenna, the variable capacitors are automatically preset to the memo- rized point when you change the frequency range in 100 kHz steps. • W hile presetting, " " blinks. Left Display Center Right The L, R, C or D in the instructions indicate the part of the controller. L: Left side R: Right side C: Center bottom D: Display (Touch screen) TUNER/CALL 16-6