Video and General Performance Verification
External Reference Lock in
Presence of Hum, Bi-Level
Applya0dBhums
ignal to the Reference and verify the waveform rasterizer
still locks correctly.
1. Press FACTORY
on the waveform raste rize r.
2. Connect the TG2000 black burst signal to the video input of the AVC1. Route
the v ideo output of the AVC1 (not the precision video output) to one of the
waveform rasterizer Ref inputs. Terminate the other Ref input connector.
3. Connect either a digital or composite signal from the TG2000 to the waveform
rasterizer and select the appropriate input to display the signal.
NOTE. For instruments without Option CPS, you must use a digital signal; for
Option CP
S instruments, you can use an analog signal for more sensitivity to
external referenceperformance.
4. Set the A
VC1for0dBof60cyclehum.
5. Press EXT on the waveform rasterizer to set the reference to external.
6. Check that the signal is locked and the WFM and VECTOR displays are
stable.
7. Record Pass or fail in the test record.
External Reference Lock in
Presence of Hum, Tri-Level
(Option HD)
Apply a 0 dB hum signal to the Reference and verify the waveform rasterizer
still locks correctly.
1. Disconnect the black-burst signal from the AVC1 input, and apply a 1080i
59.94, Tri-Level Sync signal from the AWVG1 instead.
2. SettheAVC1for-3dBof60Hzhum.
3. Check that the signal is locked and the WFM and VECTOR displays are
stable.
4. Record Pass or fail in the test record.
LTC Decoding
F
unctionality
Apply an LTC signal and verify it is correctly decoded.
An LTC is input through the 15-pin Remote connector on the rear panel. To input
anLTCsignal,youneedtoconstruct a cable as shown in the following figure.
This cable has four wires from the Remote connector, two to an RCA connector
and two to a BNC. Pin 7 of the Remote connector is connected to the center pin of
the RCA connector, and pin 6 is connected to the shield of the RCA connector.
Pin 8 of the R emote connector is connected to the center pin of the BNC and
pin 6 goes to the shield of the BNC.
Waveform Rasterizers Specifications and Performance Verification 8 1
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