Icom IC-7000 Instruction Manual - Page 124

10 ANTENNA TUNER OPERATION Menu group selection Hold down [MENU/GRP] for 1 second. Selection from: M, S or G(Graphic) Menu selection (Example: M) Push [MENU/GRP] momentarily. Selection from: S-1, S-2 or S-3 Either Y or Z ■ Optional AH-4 automatic antenna tuner operation The AH-4 matches the IC-7000 to a long wire antenna more than 7 m/23 ft long (3.5 MHz and above). • See page 20 for connection. • See the AH-4 instruction manual for AH-4 installation and antenna connection details. RDANGER!: HIGH VOLTAGE! NEVER touch the antenna element while tuning or transmitting. AH-4 setting example: For mobile operation Optional AH-2b antenna element NEVER operate the AH-4 without an antenna wire. The tuner and transceiver will be damaged. NEVER operate the AH-4 when it is ungrounded. Tr a n s m i t t i n g b e fo r e t u n i n g m ay d a m a g e t h e transceiver. Note that the AH-4 cannot tune when using a 1⁄2 λ long wire or on a multiple of that frequency. For outdoor operation Long wire [TUNER/CALL] D AH-4 operation Tuning is required for each frequency. Be sure to re-tune the antenna before transmitting when you change the frequency-even slightly. q Set the desired frequency in an HF band. • The AH-4 will not operate on frequencies outside of ham bands. w Hold down [TUNER/CALL] for 1 second. • " " indicator appears while tuning. e " " i n d i c a t o r s t ay s O N w h e n t u n i n g i s complete. • When the connected wire cannot be tuned, " " indicator blinks, and the AH-4 is bypassed and the antenna wire is connected to the antenna connector on the transceiver directly. r To bypass the AH-4 manually, push [TUNER/ CALL]. CONVENIENT • PTT tune function The AH-4 is always tuned when the PTT is pushed after the frequency is changed (more than 1%). This function removes the "hold down [TUNER/CALL]" operation and activates first transmission on the new frequency. This function is turned ON in the miscellaneous (others) Set mode (p. 131). 115