Icom IC-7610 Instruction Manual basic - Page 50
About the internal antenna tuner, Selecting the antenna type
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7 ANTENNA TUNER OPERATION About the Antenna memory settings (Continued) DDSelecting the antenna type Select the antenna connecting options between "Connect Receive Antenna" (RX-ANT is displayed as the type) and "Connect External RX Device" (RX-I/O is displayed as the type.) L"Connect Receive Antenna" is set as the default. 1. Display the ANTENNA screen. MENU » ANTENNA 2. Touch [TYPE]. Antenna type ••The TYPE SET screen is displayed. 3. Touch "RX-ANT Connectors." About the internal antenna tuner The internal automatic antenna tuner automatically matches the transceiver to the antenna within the range of 16.7 ~ 150 Ω (SWR of less than 1:3). After the tuner matches an antenna, the latching relay combinations are memorized as a preset point for each frequency range (100 kHz steps). Therefore, when you change the frequency range, the latching relay combinations are automatically preset to the memorized point for fast tuning. LWhen you install a new antenna, or you want to change the antenna settings, you can clear the all of the internal antenna tuner preset points with the "" item on the TUNER set screen. (p. 8-3) MENU » SET > Function > Tuner > NOTE: When the transceiver receives a strong physical shock, the internal latching relays may be returned to an unlatched condition. In that case, push TUNER to turn OFF the tuner, then turn it ON again to reset all latching relays. 4. Select an option. (Example: Connect External RX Device) ••Connect Receive Antenna: Select this option to connect a receive antenna to [RX-ANT IN]. "R" is displayed next to the antenna number when [RX-ANT] is touched. ••Connect External RX Device: Select this option to connect an external receive device, such as a filter or preamplifier to [RX-ANT OUT] and [RX-ANT IN]. is displayed next to the antenna number when [RX-I/O] is touched. LSee the illustration in "RX-ANT IN/OUT" to the right for the connector details. 5. To close the TYPE SET screen, push EXIT . 7-2