FLEX-6000 Signature Series – FLEX-6000 Hardware Reference Manual
Page 30 of 48
Copyright 2016 FlexRadio Systems. All Rights Reserved.
7.15 PTT INPUT
This RCA connector is provided for an external Push-To-Talk signal. Ground the center pin
of this RCA to engage PTT. (Note: 3.3VDC Max. Input.)
7.16 TRANSVERTER PORT
This female BNC connector is a receiver input and low-level exciter output for use with
Transverters. Refer to the SmartSDR documentation for information regarding using the
FLEX6000 with external Transverters.
I - The XVTR port can also be used as an auxiliary receive antenna connection when not
being used for transverter operation.
7.17 RX ANT-A RF INPUT
This female BNC connector is a direct feed to the input of the first Spectral Capture Unit
(SCU-A) in the radio. This is a dual use connection: (a) for use as a RECEIVE ONLY input to
the RXA SCU and (b) to be used with the RX ANT-A RF OUTPUT, creating a user-switchable
RX only signal path “loop” (output/input) associated with the assigned ANT port for adding
an external filter or preamplifier. Refer to the SmartSDR documentation for information
describing how to select this input, and how it can be used.
7.18 RX ANT-A RF OUTPUT
This female BNC connector is an output from the antenna feeding SCU-A. This signal is
paired with RX ANT-A INPUT (Sec. 7.17). Refer to the SmartSDR documentation for
information describing how this output is configured and how it can be used.
Δ – Please note this input is not protected by the FLEX-6000 ESD circuitry. Any device
connected to the RX ANT-A Output is susceptible to possible damage by ESD from an EMP
event if the connected device does not have adequate ESD protection circuitry.
7.19 RX ANT-B RF INPUT (FLEX-6700/6700R ONLY)
This female BNC connector is a direct feed to the input of the Second Spectral Capture Unit
(SCU-B) in the radio. This is a dual use connection: (a) for use as a RECEIVE ONLY input to
the RXB SCU and (b) to be used with the RX ANT-B RF OUTPUT, creating a user-switchable
RX only signal path “loop” (output/input) associated with the assigned ANT port for adding
an external filter or preamplifier. Refer to the SmartSDR documentation for information
describing how to select this input, and how it can be used.
7.20 RX ANT-B RF OUTPUT (FLEX-6700/6700R ONLY)
This female BNC connector is an output from the antenna feeding SCU-B. This signal is
paired with RX ANT-B INPUT (Sec. 7.17). Refer to the SmartSDR documentation for
information describing how this output is configured and how it can be used.
Δ – Please note this input is not protected by the FLEX-6000 ESD circuitry. Any device
connected to the RX ANT-B Output is susceptible to possible damage by ESD from an EMP
event if the connected device does not have adequate ESD protection circuitry.
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