Technical Reference; Calibration - Ultech Corporation DV2000 User Manual

6. Technical Reference

6.1 Calibration

Calibrating the DV2000 involves adjusting a single trimpot only. The pot sets the video output at
the analog monitor output.
Test Equipment
Component digital video pattern generator
75 ohm BNC terminator, 1%
Waveform monitor or ULTECH TV Trigger Mate & 20 MHz oscilloscope
Procedure
q q q q q 1. Remove AC line cord. Remove (6) phillips screws from sides of top cover. Remove top
cover.
q q q q q 2. Attach AC line cord. Turn unit on. Allow unit and test equipment to warm-up for 15
minutes. Caution: a shock hazard exists with the top cover removed. Do not touch AC
line switch or AC wiring. Apply a stable 1Vpp stairstep pattern to Monitor Video In.
q q q q q 3. Adjust R22 trimpot located on the DigMon PC board for 1Vpp at Monitor Video Out
when terminated into 75 ohm.
(end of procedure)
Fig. 6-2. Adjustments
I I I I I

A shock hazard exists with the top cover removed—only qualified
personnel should perform the calibration procedure.
6. Technical Reference
R22
41
DigMon PC board