FlexRadio Systems Tuner Genius XL User Manual page 38

6.3.2.5 Unlisted Exciters
PTT
Connect an appropriate cable between the radio's PTT output and the tuner's PTT Input A or B jack. Most
radios have a PTT interface. However, it is essential to check your exciter manual to determine the keying
voltage and current, especially with older radios. The Tuner Genius XL PTT lines are opto‐isolated, but they will
not tolerate high voltages or an AC voltage. Therefore, be prepared to provide a keying buffer relay designed for
the task, like the Ameritron™ ARB‐704 amp to transceiver interface.
i – Some operators choose to use a keying buffer in all cases as "insurance" to prevent any possible damage
to the exciter or tuner due to possible transient voltage spikes or RF ingress.
Band Data
Most radios use one of these protocols to send band data to external devices:

BCD / PTB protocol
Connect your radio or band decoder to the BCD/PTB Input A or BCD/PTB Input B connector on the
tuner. This connection requires no additional configuration and works automatically. Band data arriving
on the BCD/PTB connection overrides other sources. See section 14.2.7, PTB/BCD Connector Pinout,
for additional information. Also see section 6.3.1.4, Band Data and Frequency Measurement based
restrictions, in this case.

CAT protocol
Connect your radio's CAT output to the CAT Input A or CAT Input B connector on the tuner. Then,
configure the CAT protocol details using the Tuner Genius XL Windows Utility.

CI‐V protocol
Connect your radio's CI‐V output to the CI‐V Input A or CI‐V Input B connector using a 3.5mm TS or TRS
connector. Configure the CI‐V protocol details using the Tuner Genius XL Windows Utility.

Frequency Measurement
The Tuner Genius XL will measure an RF signal's frequency applied to one of its inputs and
automatically switch in the appropriate tuning solution. This band switching mode often requires that
you double‐key briefly before the first full transmission to allow the correct tuning solution to be set.
Also see section 6.3.1.4, Band Data and Frequency Measurement based restrictions, in this case.
Please proceed to section 6.5, Testing.
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Page 38 of 72
7 June 2021(FW:0.9.12, Utility: 0.9.12)