Extron Electronics PVS 405D User Guide - Manual (Page 20)

Bass and treble control
For optimum audio quality, the audio input levels and the bass and treble controls must all
be set up properly. Input audio levels may need to be adjusted depending on the variation
of the output levels from different source devices.
NOTE: By default these levels are set for the consumer product level of ‑10 dBV.
Bass and treble should be adjusted once the input and output levels have been adjusted.
These are adjusted by configuration software or SIS commands only, with a range from
‑24 dB to +12 dB. By default the bass and treble have been set at 0 dB. See the
SIS Communication and Control ” section for details on SIS commands.
VoiceLift level adjustment
To adjust VoiceLift microphone levels, rotate the MIC adjustment encoder through 43
positions (in 1 dB steps) from ‑18 dB to +24 dB, default is ‑3 dB.
While speaking into the microphone, increase the gain until the Normal LED is lit and the
Peak LED only lights occasionally.
PEAK
NORMAL
SIGNAL
AUDIO LEVEL ADJUST
PAGING
SENSOR
SENSITIVITY
VOICELIFT PEAK
NORMAL
SIGNAL
INPUT
PEAK
NORMAL
SIGNAL
Signal threshold;
raise input gain.
Level has been
properly adjusted.
Level set too high,
lower input gain.
Figure 9. Front panel VoiceLift Mic Min/Max LED and adjustment encoder
The VoiceLift Microphone Receiver input signal is not affected by the volume adjustment
and tone control via SIS or an MLC controller attached to the switcher. The VoiceLift audio
channel is always active, and it is independent of the selectable audio inputs (1 ‑ 5).
The VoiceLift Receiver Microphone input audio can be heard throughout a presentation,
whether or not another input is selected.
NOTE: If audio output is muted via the “1Z” SIS command, all audio will not be heard.
The VoiceLift Microphone input can be muted via a separate SIS command. See the “ SIS
Communication and Control ” section, for details.
PVS 405D Switcher • Operation 14