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rotating the encoder knob (see Encoder knob in the next chapter). Adjust
the horizontal phase until there is no (0°) difference between the
composite video output's horizontal sync phase and the genlock signal's
horizontal phase. See the Oscilloscope displays section.
7.
Set the scope to view the subcarrier signals. Press the SVS 100's Sub
Phase button for 2 seconds (see the Operation chapter) and adjust the sub
phase by rotating the encoder knob until there is a zero phase difference
between the genlock signal and the NTSC/PAL output. The Burst Lock
LED should light.
If the Burst Lock LED does not light at this point, either adjust the horizontal
or subcarrier phases further, or use a different genlock source.
8.
View the horizontal phases again. If the phase difference is not zero,
repeat steps 6 and 7 until the settings do not change.
If the Burst Lock LED does not light at all when genlock is active and the
horizontal and subcarrier phases have been adjusted to match the genlock
signal, do not continue with this procedure. A different, more stable or time-
base-corrected sync signal must be used for the genlock timing source.
9.
Once the settings are stable and the Burst Lock LED lights, disconnect the
oscilloscope, and reconnect the genlock cables.
10. Check the display(s) for proper colors and for undesirable artifacts in the
image(s). Make adjustments as necessary.
11. If other SVS 100s are part of this genlock daisy chain, connect the
oscilloscope to each device, and repeat this procedure.
Oscilloscope displays
What you see on the oscilloscope while adjusting the SVS 100 to match the
genlock signal depends on the type of signal used, the type of oscilloscope,
and the procedure the scope requires. This section shows some examples of
oscilloscope displays.
Figure 2-7 below shows the genlock input signal (top) and an out-of-alignment
NTSC composite sync output signal (bottom) displayed on a waveform
monitor to check for alignment. When the phases are aligned, the wave peaks
on the bottom waveform should line up with those in the reference signal
above it.
Figure 2-7 — Superimposed waveforms
SVS 100 Installation
2-7
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