Fluke 190-104 - Video Test Using the Video Pattern Generator

Fluke 190-104/190-204
Service Information
4-28
4.6.17 Video test using the Video Pattern Generator
You can skip this test if you do the test 4.6.17 Video test using the SC600 Scope
Calibration option
Only one of the systems NTSC, PAL, PALplus, or SECAM has to be verified.
Proceed as follows:
1. Connect the Test Tool to the TV Signal Generator as shown in Figure 4-11.
ADC
B
PM5418
PM9075
4119-75
75 OHM
USE 75 OHM TERMINATION
USE 75 OHM COAX CABLE
Figure 4-11. Test Tool Input A to TV Signal Generator
2. Select the following Test Tool setup:
• Reset the Test Tool
• Press
TRIGGER
, then press
F4
to open the Trigger Options menu.
• Choose
VIDEO on A... , then from the shown opened menu choose
Polarity: POSITIVE | PAL ( or NTSC or PALplus or SECAM )
• Press
F2
to select ALL LINES
• Press
F3
to enable the arrow keys for selecting the video line number.
• Using
select line number:
⇒ 622 for PAL, PALplus, or SECAM
⇒ 525 for NTSC.
• Using
mV
RANGE
and
V
RANGE
set the Input A sensitivity to 200 mV/div (the actual probe
setting is 1:1).
• Using
TIMEsns
select the time base to 20 μs/div.
3. Set the TV Signal Generator to source a signal with the following properties:
• the system selected in step 2
• gray scale
• sync pulse amplitude > 0.7 div.