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TROUBLESHOOTING
© Polycom, Inc. 37 VORTEX EF2241 Reference Manual
T
ROUBLESHOOTING
A
UTOMATIC
M
ICROPHONE
M
IXER
No microphones
are gating
• Check if the microphones are muted.
• Are microphones part of one of the 2 automixers?
Some
microphones are
not gating
• Check if the microphones are assigned to an automixer.
• Check if the microphones are muted.
• Check microphone levels. Are microphones set to the appropriate mic or line
level? Is phantom power on where needed?
• The Hold Time may be too low. Microphone channels gating On and Off too fre-
quently during short pauses in speech might be the result of setting the Hold
Time too low.
• Check Gating settings. Are microphones Forced Off?
• Is Chairman Mode on? If you have assigned a Chairman Mic, all other micro-
phones will gate Off once this microphone gates on.
• Check Gating Priority. If your inputs have a Gating Priority of 4, the micro-
phones may not gate as frequently.
• Check Maximum Number of Open Microphones. This parameter sets the num-
ber of open microphones allowed at any time. If this parameter is set too low, the
microphones may not gate as often as you wish.
• Adjust the Adaptive Threshold if the Gate Threshold is set to Adaptive or adjust
the Manual Threshold if the Gate Threshold is set to Manual. For Adaptive Gate
Threshold, set the Adaptive Threshold lower so that the microphone will gate On
when lower level signals are present at the microphone. For Manual Gate
Threshold, set the Manual Threshold to a lower absolute threshold.
Too many
microphones are
gating
• The Hold Time might be too high. Too many microphones gating on at the same
time may be the result of Hold Time values that are too high.
• Assign a Chairman Mic. This will cause all other microphones to gate Off once
this microphone gates on and will prevent too many microphones from gating.
• Set Gating Priority so that not all microphones have the same priority. The
default value for each input is a Gating Priority of 1, which is the highest priority.
• Adjust the Adaptive Threshold if the Gate Threshold is set to Adaptive or adjust
the Manual Threshold if the Gate Threshold is set to Manual. For Adaptive Gate
Threshold, set the Adaptive Threshold higher so that the microphone will gate
when only louder signals are present at the microphone. For Manual Gate
Threshold, set the Manual Threshold to a higher absolute threshold.
• Using the Adaptive Gate Threshold is recommended for more accurate gating.