VS1 Operations and Maintenance Manual Operating the transmitter
Page 2-64 Issue 3.1 2013-10-01
Other Settings tab:
• Pilot Level: enter value between 6 and 12% (typically 9%); this level is added to the compos-
ite baseband
• Pilot 1 PPS Sync: select On or Off. If On, enter:
– Pilot Sync Phase (enter value between 0 and 360 degrees; typically 0 degrees)
• Audio Delay: Used to time align the receiver output of decoded analog and digital audio
signals. Select Yes or No. If Yes, enter:
– Audio Delay: enter value between 0 and 12,000 ms (default is 0)
• Mod (Modulation) Loss Timeout: select Yes or No. If Yes, enter:
– Action: None (no resulting action), Inhibit (inhibits the RF output and fans until the
audio returns) or Change Preset (changes the active preset).
– Mod Loss Preset: displayed only if Action is set to Change Preset. Select the preset from
the drop down list that will activate upon the loss of a modulating signal, post the
timeout period.
– Timeout Minutes: sets the delay, in minutes, between modulation loss detection and the
resulting action. Enter a value in the allowable range of 0 and 255 minutes.
– Timeout Seconds: sets the delay, in seconds, between modulation loss detection and the
resulting action. Enter a value in the allowable range of 0 and 59.9 seconds.
– Threshold: sets the threshold for modulation loss detection. Enter a value in the
allowable range of 0 and 100% (default is 0%) (see Configuring a Mod Loss Backup
Preset on page 4-4 for detailed instructions).
• Hard Limiter: If enabled, the modulation level will be limited (audio signal clipped or dis-
torted) if it exceeds the hard limit threshold. Select Yes or No. If Yes, enter:
– Hard Limit: enter value between 0 and 160% (default is 160%)
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