Icom IC-7100 Advanced Instructions - Page 304

Previous view 16 ANTENNA TUNER OPERATION Operating the AH-4 DDBefore operating R DANGER HIGH VOLTAGE! NEVER touch the antenna element while tuning or transmitting. Always place it in a secure place. NEVER operate the AH-4 without an antenna connected. The tuner and transceiver will be damaged. NEVER operate the AH-4 when it is ungrounded. Transmitting before tuning may damage the transceiver. Note that the AH-4 cannot tune when using a 1⁄2λ long wire or on a multiple of that frequency. DDOperating Tuning is required for each frequency. Be sure to retune the antenna before transmitting when you change the frequency-even slightly. qqPush TUNER/CALL (L) to turn ON the AH-4. The CW mode and 10 W output power are automati- cally selected, and the tuning starts. • The TX LED lights red. • " " blinks while tuning. • A fter changing the frequency, you should hold down TUNER/CALL (L) for 1 second to manually start tuning. In this case, the CW mode and 10 W output power are au- tomatically selected, and the TX LED lights red. NOTE: DO NOT change the frequency and oper- ating mode while " " is blinking. It may takes approximately 2 to 3 seconds (maximum of 15 seconds) to complete tuning. ww" " is still ON after the tuning is completed, and the previously selected operating mode and the out- put power are automatically selected. • W hen the connected wire cannot be tuned, " " goes out, the AH-4 is bypassed and the antenna wire is di- rectly connected. 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 DDPTT tune function The AH-4 always tunes when [PTT] is pushed after the frequency is changed on an HF/50 MHz bands (more than 1%). Turn ON this function in the "Function" Set mode. (p. 17-20) SET(C) > Function > Tuner > PTT Start 16-4