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14.2 Connection Information and Pin Out Diagrams
14.2.1
Power Connector
2.1mm x 5.5mm polarized connector. DC voltage from 12 – 25vdc.
14.2.2
Ground Connection
This thumbscrew is for attaching an earth ground to the chassis of the tuner. Grounding is the most critical
safety enhancement you can make to your shack. Always ground the tuner to your station RF ground using
high‐quality wiring, making the length as short as possible. Braided wire is considered the best for ground
applications. Your station ground should be a common point where all grounds come together. You will likely be
using a PC and a DC power source, so be sure to ground these devices together as well.
14.2.3
Push to Talk (PTT)
14.2.3.1
PTT IN
This RCA connector is provided for an external Push‐To‐Talk signal. Ground the center pin to engage PTT. (Note:
3.3VDC Max. Input.)
14.2.3.2
PTT OUT
This RCA connector is provided to supply a Push‐To‐Talk signal to other devices. The center pin is grounded
when PTT is asserted. Note that the Tuner Genius XL provides this signal after making any adjustments to the
tuning solution when it receives PTT. This signal can therefore be used to synchronize RF generation so that the
RF signal is never generated before the tuner is ready to receive it.
14.2.4
RS-232 Serial Connector Pinout
RS‐232 stands for Recommended Standard number 232. RS‐232, as an interface, has been a standard for many
years and is typically employed to connect a peripheral to a computer. The standard specifies a maximum open‐
circuit voltage of 25 volts: signal levels of ±5 V, ±10 V, ±12 V, and ±15 V are all commonly seen depending on
the voltages available to the line driver circuit. For the TGXL, the RS‐232 voltage is +12 and ‐12vdc and uses pins
2,3, and 5. Please consult the diagram below for details.
Copyright 2021 FlexRadio. All Rights Reserved.
Page 69 of 72
7 June 2021(FW:0.9.12, Utility: 0.9.12)
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