Performance Verification
4.6 Scope Input A&B Tests
4
Proceed as follows:
1. Connect the test tool to the calibrator as shown in Figure 4-16.
al55sca.bmp
Figure 4-16. Test Tool Input A to TV Signal Generator
2. Select the following test tool setup:
• Reset the test tool
• Press
, then press to open the Trigger Options menu.
• Choose
VIDEO on A...
, then from the shown opened menu choose
Polarity: POSITIVE | PAL
(
or
NTSC PALplus SECAM
)
• Press to select
ALL LINES
• Press
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 and set the Input A sensitivity to 2 V/div (the actual probe setting
is 10:1).
• Using select the time base to 20 μs/div.
3. Set the calibrator to mode video with amplitude +100%. Set format and marker line
number to :
⇒ PAL 622 (even), for PAL and PALplus
⇒ SECAM 622 (even), for SECAM
⇒ NTSC 262 even, for NTSC.
4. Observe the trace, and check to see if the test tool triggers on the negative pulse
before the marker pulse (see Figure 17).
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