CHAPTER 6
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VOLT PROCESSING
VOLT: SG functions
SSB [Single Sideband Suppressed Carrier]: VOLT: SG’s special SSB setting provides an ad-
vanced L-R signal. It can help reduce multipath and noise, and provide increased protection to
the baseband spectrum and to HD signals. While SSB is compatible with just about every re-
ceiver made in the past 30 years, it might require registration with your local regulatory agency.
Telos pioneered SSB for FM. For more information please see Frank Foti’s white paper, available
at Telos’ website.
You can also set VOLT: SG to conventional DSB, which provides a full double- sideband, sup-
pressed carrier L-R signal.
OneLouder: VOLT: SG’s Embedded Pilot Feature allows one full dB more signal (or 10% more
modulation) without exceeding legal limits. It is active at all times in VOLT: SG
21
. For more
information, see Frank Foti’s video on our website.
Pilot Phase: This lets you set the phase relationship between the 19 kHz pilot and the 38 kHz
suppressed carrier. The system default is 0.0 degrees. The performance of VOLT’s DSP stereo
generator is theoretically perfect… but it can be adjusted ±32°, in one degree increments, if
needed to offset time domain errors in the overall transmission system. Use a calibrated modula-
tion monitor when making this adjustment.
Comp Clipper Drive: VOLT: SG’s composite clipper, when properly calibrated to the input lev-
el, can remove overshoots that have been created by nonlinearities in an analog or compressed
digital STL, and give you better control over modulation. While you can also use this clipper
more aggressively to add “just one more tiny bit of flat-topped loudness”, we don’t recommend
it. Create the audio loudness profile you want through proper processing, in an Omnia or similar
gear, back at the station. Then use VOLT: SG’s composite clipper as final protection for your
overall signal.
21 OneLouder technology requires a lot of DSP power, and is available only in VOLT: SG. While there’s a stereo
generator in VOLT: FM, that unit has to also allocate DSP for multiband level processing and enhancement
functions. So it can’t include the OneLouder feature.
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