FLEX-6400/FLEX-6600 Hardware Reference Manual
Page
28 of 45
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TRS Connector
Contact
Description
Connector
Tip
Positive phase or mic (+)
Ring
Negative phase or mic (-)
Sleeve
Ground or shield connection
7.21
XVTR-A 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
FLEX-6400/FLEX-6600 with external transverters. The FLEX-6400 has one transverter port
and the FLEX-6600 includes two transverter ports.
I - The XVTR port can also be used as an auxiliary receive antenna connection when not
being used for transverter operation.
7.22
RX IN/RX-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 port is for use as a RECEIVE ONLY input to the RXA SCU. Refer to
the SmartSDR documentation for information describing how to select this input, and
how it can be used.
7.23
HEADPHONE JACK
The PHONES connector accepts headphones with a standard 1/8-inch (3.5mm) stereo
(TRS) plug. Recommended ratings for headphones are 25mW into 16-ohm load or 13mW
into a 32-ohm load.
CAUTION: Do not use a mono (TS) plug as this will short-circuit the
right channel signal to ground
.
WARNING! NEVER operate the transceiver with headphones or other audio accessories
at high volume levels. Discontinue use immediately if you experience any ringing in
your ears.
7.24
CHASSIS GROUND
This is a thumbscrew for attaching an earth ground to the chassis of the radio. Grounding
is the most important safety enhancement you can make to your shack. Always ground
the FLEX-6400/FLEX-6600 to your station RF ground using high quality wiring with the
