Extron Electronics VSC 500_700_700D User Guide User Manual
Page 12
3.
Connect the video input signals to the VSC, as described previously in this section.
4.
Connect the oscilloscope (“scope”) probe A to the Genlock Out connector. This will
provide the reference signal of the scope. 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 genlock output of the VSC.
IN
SDI
B/B-Y
G/Y
R/R-Y
VID
H/HV
V
H/HV
V
H/HV
G
B
R
G
B
V
OUT
GENLOCK
S-VIDEO
RS-232
/422
50/60 Hz
100-240V 0.3A
OUTPUTS
INPUTS
R
Timing Source
OUT
To Scope
Probe A
75 ohm Terminator
To Scope
Probe B
75 ohm Terminator
5.
Connect scope probe B to the composite video output connector (VID) of the VSC.
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 composite output of the VSC as
shown in the previous diagram.
6.
Using the instructions for the scope you are using, set the scope to view the horizontal
phases of the signal. Adjust the horizontal phase by rotating the Adjust horizontal
([) knob (see the “
” section in this 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 “
section.
7.
Set the scope to view the subcarrier signals. Adjust the sub phase by rotating the Adjust
vertical ({) knob until there is a zero phase difference between the genlock signal and
the NTSC/PAL output (see the “
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 displays for proper colors and for undesirable artifacts in the images. Make
adjustments as necessary.
11.
If other VSCs are part of this genlock daisy chain, connect the oscilloscope to each
device, and repeat this procedure.
VSC 500/700/700D User Guide • Installation and Operation
6