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1a
PTT Output: Opto‐isolated female RCA connector. The center pin is grounded when section A
of the tuner is keyed and ready to accept RF drive.
2a
PTT Input: Opto‐isolated female RCA connector. Ground the center pin to shield to engage
PTT for the tuner.
3a
CI‐V Input A: Opto‐isolated 3.5mm female connector for Icom radio A band data
4a
CAT Input A: Opto‐isolated male DB9 connector for radio A CAT command input
5a
BCD/PTB Input A: Opto‐isolated DE‐15 female connector for radio A band data
6
Ethernet connection: RJ45 Local Area Network Ethernet connection
7
DC Power input: Nominally 15 volts DC, center pin positive
8
Main Power Switch
9
Station Ground
B
B inputs: B inputs and output are intended for the SO2R switching option and are disabled for
the 1x3 switching option.
5.2.2 SO2R Antenna Switching Option
The SO2R back‐panel option provides specialized support for SO2R (single operator, two radio) radiosport
operations. The connectors are logically divided into the Port A connectors and the Port B connectors. The
tuner will tune the signal on the A input and output it on the A output, or it will tune the signal on the B input
and output it on the B output. The A and B sections of the tuner can be controlled independently by two radios.
Copyright 2021 FlexRadio. All Rights Reserved.
Figure 5-4 1x3 Switching Option Drawing
Page 12 of 72
7 June 2021(FW:0.9.12, Utility: 0.9.12)
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