FLEX-6000 Signature Series – Maestro User Guide
Copyright 2024 FlexRadio, Inc. All Rights Reserved. | Page 95
indicating the average input level and the smaller box-like component farther to the right of the
average input level bar is the peak level indicator. The Level meter indicator bars also utilize three
colors to visually indicate the input level range. Signals up to -10 dB are shown in green. Signal
levels between -10 and 0 dB are shown in yellow. Any signal level greater than 0 dB is shown in
red.
When setting up your microphone audio for optimal modulation, adjust the input gain so that the
peak level indicator is peaking just BELOW 0 dBFS on voice peaks. Your peak level indicator must
never exceed 0 dBFS and turn red at any time. A red peak level indicator indicates over-driven or
“clipped” input audio levels resulting in audio distortion. The input ALC is active, but excessive
input signal levels may result in input signals that can exceed 0 dBFS. If you see the peak level
indicator turn red at any time, turn down the audio input level until you no longer see the peak
level indicator turn red.
The compression meter indicates the amount of compression provided by the speech processor
based on the PROC setting and the input gain level. This meter is informational only and is not used
in setting microphone levels.
20.4.2 Operating the Speech Processor
The speech processor implements the W9GR Controlled Envelope Single Sideband (CESSB) peak
limiting algorithm in SSB, AM, and FM modes. The processor may be on or off and has three
different settings when enabled. In the NOR or normal setting, the processor provides minimal
additional gain and simply prevents audio peaks from clipping or producing power over the set
level. In the DX setting, some compression is provided to the audio to increase the overall sideband
envelope which results in a stronger signal that may be more readily heard at a distance. The DX+
setting adds even more compression increasing your talk power or “punch” without incurring
significant audio distortion. DX+ is most effective if you increase the low-cut TX filter to between
200-400 Hz to concentrate your talk power in the audio frequency range that has the greatest
intelligibility.
The recommended setting is to leave the speech processor enabled and in the NORmal or DX
position.
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