Extron Electronics MVP 104GX User Guide - Manual (Page 16)

MVP 104GX Installation
Installation, cont’d
2-8
To synchronize the MVP 104GX’s video output with a genlock signal, follow these
steps:
1 . Power up and turn on all the devices that will use the genlock signal.
The devices must be on for at least 15 to 20 minutes before proceeding
with any adjustments.
2 . Connect the active timing source signal to the Genlock In connector on
the rear panel.
3 . Connect the video input signals to the MVP 104GX, as described
previously in this chapter.
4 . Connect the oscilloscope (“scope”) probe A to the Genlock Out connector.
This will provide the scope’s reference signal. In order to avoid altering
the genlock signal, use the cabling configuration that will be used in the
installation. Either connect the genlock signal cable from the scope to the
next device in the system to be timed, or provide 75 ohm termination at
the scope’s genlock output.
5 . Connect scope probe B to the MVP 104GX’s composite video output
connector.
6 . Using the instructions for the scope you are using, set the scope to view
the signals’ horizontal phases. 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 Oscilloscope displays.
7 . Set the scope to view the subcarrier signals. 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.
8 . View the horizontal phases again. If the phase difference is not zero,
repeat steps 6 and 7 until the settings do not change.
9 . Once the settings are stable, 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 MVP 104GXs are part of this genlock daisy chain, connect the
oscilloscope to each device, and repeat this procedure.
REMOTE
RS-232/RS-422
UT 2
IN
OUT
OUTPUT
A
B C
1 L R
INPUTS OUTPUT
INPUT 3
IN
OUT
INPUT 4
IN
OUT
2 L R 3 L R 4 L R 1 L R
Timing Source
OUT
To Scope Probe
75 ohm Terminator
To Scope Probe B
GENLOCK
IN OUT