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FLEX-6000 Signature Series – Maestro User Guide

TX Channel and Microphone Interaction for details concerning the interaction of VOX and the DAX

TX channel.

20.4.5 Monitor Mode Operation

The Monitor controls are found in the TX Menu. Monitor mode is enabled by tapping the MON

button. The monitor level may be controlled by the adjacent slider.

Note: The MON feature allows for monitoring of the processed audio before the final brick

wall filtering and ALC limiting, compression, and equalization, allowing the operator to listen

to the transmitted audio in “real-time” with minimal latency or delay. However, since the

monitor audio bypasses the signal processing stages, the audio heard in the monitor is not the

same as what is being transmitted and therefore is not suitable for determining the over-the-

air quality of your transmitted signal.

NOTE: When operating in multiFLEX with multiple Stations connected, when the MON is on,

the transmit audio will be heard from whichever Station is transmitting. This is mutually

exclusive with Full Duplex operation.

20.4.6 How to Configure the Downward Expander (DEXP)

The Downward Expander controls are found in the TX Menu. The Downward Expander reduces the

microphone input gain during the quiet periods between spoken words, eliminating extraneous

background noise. This improves the apparent signal-to-noise ratio of your transmitted audio by

“soft gating” ambient room noise between words.

To adjust the Downward Expander, enable DEXP and move the DEXP Threshold slider to 0. While

transmitting and listening with MON without speaking, adjust the DEXP Threshold until you can no

longer hear the background or ambient noise at your operating position. In most cases, a DEXP

threshold level of 60-70 should be sufficient.

20.4.7 DAX TX Channel and Microphone Interaction

When the DAX TX channel has been selected to provide audio for the transmitter (DAX button in

the TX Menu), the radio will still accept audio from the selected microphone as long as the DAX TX

stream contains no data. As soon as data appears, the DAX TX channel becomes the transmitted

audio.

This feature is provided to support voice keyer configurations. The user can enable both the DAX

TX channel and a microphone and use the microphone normally as long as the voice keyer program

is not sending a message. When a voice keyer message is desired, the associated program simply

FlexRadio Signature FLEX-6000 Series User Manual

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