Powering Up The Bay; Adjusting Vertical Phase - American Dynamics MegaPower 3200 Installation Manual

Powering Up the Bay

1. Unscrew the two thumbscrews at the top
corners of the bay's front panel.
2. Slowly pull the top of the front panel towards the
front and lift it up to remove it.
3. Verify that power to the bay is OFF (the On/Off
switch on the front panel should not be lit).
4. Plug the bay's power cord into the required
voltage input:
AD2010N, AD2020N: 120Vac, 50-60Hz
AD2020P, AD2020P: 100–240Vac, 50-60Hz
5. Press the On/Off switch to turn the bay on.

Adjusting Vertical Phase

The vertical phase adjustment enables bays to
synchronize so vertical roll or a black bar does not
occur between each video switch. Switching can
be synchronized one of three ways:
• The ac line (line locked)
• External vertical drive (generator locked)
• Composite video input.
Use one method for all bays of the system.
AC LINE: The most common form of
synchronization is to lock the vertical switching
point to the ac line. To use this feature, switch the
Sync Reference Selection to AC LINE. The ac (50-
60Hz) line is then used to determine the vertical
timing. If all video inputs use the same ac phase,
no roll will occur.
1. Sync all 256 cameras of camera group 1 to
each other.
2. On the data buffer module, connect monitor 1 to
the top most BNC.
3. Using an external keyboard, call input 1 to
output 1.
4. On the front panel of the power supply, set the
SET UP/NORMAL switch to SET UP.
Note: The Sync Test On/Off LED blinks when
the sync test switch is in the SET UP position.
Note: The vertical interval bar, displayed on
output 1, shows the vertical switch with respect
to the picture.
AD2010N/P AND AD2020N/P MATRIX SWITCHING BAYS
INSTALLATION GUIDE
5. The phase adjustment screw, accessed through
the hole in the front panel of the power supply,
adjusts the phase of the vertical interval
synchronization pulse for the switcher with
respect to the selected reference.
Using a TV alignment tool or equivalent, adjust
the position of the vertical interval bar by turning
the phase screw until the bar is located as
shown in Figure 22. The bar should be visible
on the screen and not in the vertical sync.
Note: Once the bar is set, no further adjustment
is necessary.
6. Select the video input from the next camera
group in the system.
- If the vertical interval bar is not in the same
place as shown in Figure 22, adjust the sync
location on the "video device" (such as a
video camera) until the bar is towards the
bottom of the screen.
- If the bar is in a different place than it was in
the previous camera, camera roll will occur
when switching to that camera.
7. Repeat steps 1–6 for all remaining camera
groups in the system.
Note: Before adjusting all the video inputs,
quickly scan all inputs to see if only a few are
out of phase and adjust accordingly (input one
may be the only one out of phase).
8. Once all cameras are synchronized, set the
SET UP/NORMAL switch back to NORMAL.
EXT V-DRIVE: If an external generator controls the
vertical switching point, switch the Sync Reference
Selection switch to EXT V-DRIVE (external vertical
drive). Generator output voltage should not exceed
5Vp-p.
1. Connect the drive output from the generator to
the EXT SYNC IN BNC on the power supply
rear panel.
2. Connect a 75-ohm terminator to the EXT SYNC
OUT BNC.
3. If other bays are used, loop the EXT SYNC from
input to output for all bays and connect a
75-ohm terminator to the last bay EXT SYNC
OUT BNC.
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