VS1 Operations and Maintenance Manual Operating the transmitter
Page 2-58 Issue 3.1 2013-10-01
Main audio - additional configuration settings:
– Analog Level: applies to Left/Right/Mono 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 Primary Digital, Secondary Digital and MPX Over AES sources
only; enter value between -25.5 and 0 dBFS, with a typical setting of -4 dBFS (100%
modulation value).
– Audio Mode: select Mono L, Mono R, Mono L+R or Stereo (applies to Left/Right/
Mono, Primary Digital or Secondary Digital sources; selecting Stereo applies a 19 kHz
pilot).
– 15kHz Lowpass Filter: applies to Left/Right/Mono, Primary Digital, and Secondary
Digital audio modes; select On (applies 15 kHz low-pass filter to audio input) or Off.
– Preemphasis: select 0 us, 25 us, 50 us or 75 us. This setting applies to all sources except
MPX.
– Main Audio Gain Adjust: applies to Left/Right/Mono source only; allowable range is -
20 to 10 dB. This configuration setting will increase the incoming signal level and yield a
proportional increase in % modulation.
– 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.
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