Encode; Composite Output 1; Sca Level; Pilot Injection - Omnia -6EX / EXi Installation And Operation Manual

Encode (FM Mode Only)
Encode Menu
Composite Output #1, Output #2 and Range
The Output controls individually set the level at the two separately buffered rear-panel composite outputs. When
Range is set to Low, both Output controls will adjust between 0.66 and 5.02 volts peak to peak. When Range is set
to High, both Output controls will adjust between 1.45 and 11.02 volts peak to peak. Use the jog-wheel to select the
modulation level for each composite output. Once the desired peak modulation level is displayed, click the jog-
wheel to set the level and return to Highlight Mode.
Always use typical program material and a calibrated modulation monitor to properly set modulation. To aid quick
adjustment, it sometimes helps to advance the Clipping control before adjusting the composite outputs. Note that
reference line-up tones applied at the Omnia-5EX input cannot be used since the RMS level of a steady state tone
does not crest at 100% modulation.

SCA Level

Sets the SCA subcarrier deviation level. This adjustment should always be done using a calibrated modulation
monitor.
Note: Adjusting the Composite Outputs changes the SCA deviation level since the two output controls are
effectively in series. Always recheck the SCA Level adjustment after making adjustments to the Composite outputs.

Pilot Injection

Sets the pilot level from 6% to 12%, in 0.1% steps, relative to 100% modulation. To defeat the pilot, simply adjust
the Pilot Injection control below 6% and the control indicates Off.

Pilot Phase

This parameter sets the phase relationship between the 19 kHz pilot and the 38 kHz suppressed carrier. The system
default is 0.0º. The performance of the DSP based digital stereo generator is theoretically perfect, however should
the phase need adjustment in order to offset time domain errors in the overall transmission system, the pilot phase
can be adjusted ±32º, in 2º increments. We recommend that a calibrated modulation monitor be used for this
adjustment. If one is not available, the tried and true "bow tie" method using an out-of-phase 100 Hz tone and
oscilloscope will suffice. If you are not familiar with this method, contact Omnia tech support for details.
Omnia-6ex Use and Operation Manual – V: 1.20
43
Seven parameters are set under this menu:
•
Composite Range
•

Composite Output 1

•
Composite Output 2
•
SCA Level
•
Pilot Injection
•
Pilot Phase
•
Stereo Separation