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System Timing (13.5 MHz, Serial I/O only)
Timing Procedures
Switcher Delay = 70 µS
This procedure sets the serial inputs to the center of the auto timing range.
Make sure you have assigned your serial inputs in the Configuration menu
before proceeding.
1. Select one of the serial sources and connect it to the serial to analog
converter.
2. Connect the Y (or G) output of the converter to the scope. Adjust the
delayed sweep on the scope so that the midpoint of the black–to–white
transition is at a reference point.
3. Connect this source to a primary switcher input and select it on the
program bus.
4. Connect the serial program output of the switcher (J5 or J6 of the Serial
Output Module in Slot D6) to the input of the converter.
5. Adjust the rotary switches on the front of the Sync Generator Module
so that the black-to-white transition is 70 µS later than the previously
noted reference point.
Switcher Delay = 50 µS
Use this procedure to set the switcher delay to a minimum.
1. Select the serial source with the latest delay, and connect it to the serial-
to-analog converter.
2. Connect the Y (or G) output of the converter to the scope.
3. Adjust the delayed sweep on the scope so that the midpoint of the
black-to-white transition is at a reference point.
4. Connect this source to a primary switcher input and select it on the
program bus.
5. Connect the serial program output to the input of the converter. Adjust
the rotary switches on the front of the Sync Generator Module so that
the black-to-white transition is 50 µS later than the previously noted
reference point.
6. The serial input with the latest delay can move up to 2.5 µS later and
still be autotimed by the switcher.