Nautel VS300, Operation And Maintenance Manual

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VS300 Operations and Maintenance Manual Operating the transmitter
Issue 8.0 2016-03-01 Page 2-61
Main audio - additional configuration settings:
– Audio Player Source: applies to Audio Player -> AES 2 source only; select the desired
audio playlist.
– Analog Level: applies to Analog Left/Right source only; enter value between -12 and
+12 dBu, which represents the input voltage level that yields 100% modulation (Default
is 0.0 dBu).
– Digital Level: applies to MPX Over AES, AES/EBU 1 and Audio Player -> AES 2
sources only; enter value between -25.5 and 0 dBFS, with a typical setting of -4 dBFS
(100% modulation value).
– MPX Level: applies to MPX source only. Set this parameter level in Vpp (typically
3.5 Vpp - 100% modulation value). The allowable range for this setting is between
1-5 Vpp.
– Audio Mode: applies to Analog Left/Right, AES/EBU 1 and Audio Player -> AES 2
sources only; select Mono L, Mono R, Mono L+R or Stereo (selecting Stereo applies a
19 kHz pilot).
– 15kHz Lowpass Filter: applies to Analog Left/Right, AES/EBU 1 and Audio Player ->
AES 2 audio sources only; select Enabled (applies 15 kHz low-pass filter to audio input)
or Disabled.
– Preemphasis: applies to Analog Left/Right, AES/EBU 1 and Audio Player -> AES 2
audio sources only; select 0 us, 25 us, 50 us or 75 us. .
– Main Audio Gain Adjust: applies to Analog Left/Right, AES/EBU 1 and Audio Player
-> AES 2 sources only; allowable range is -20 to 10 dB. This configuration setting will
increase the incoming signal level and yield a proportional increase in % modulation.
– Audio Backup: When you set
Audio Backup
to
Enabled,
you can select a backup
Audio
Source
and edit various parameters for the backup audio similarly to the main audio
described above. The backup audio source, if enabled and present, will replace the main
audio source if the main audio level is less than its user-determined trip threshold (see
“User Settings - Front Panel UI” on page 2-154 ). The main audio source will be restored
as the active source if it returns and is present for at least one second.