Fluke 225C Service Manual - Page 48

Video test using SC600 Scope Calibration Option, Polarity, NEGATIVE, PALplus, SECAM

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Fluke 19xB-19xC-2x5C Service Manual Figure 4-13. Test Tool Input A to TV Signal Generator Inverted al-tv-ai.bmp 8. Select the following test tool setup: • Press to open the Trigger Options menu. • Choose VIDEO on A... , then from the shown opened menu choose Polarity: NEGATIVE | PAL ( or NTSC PALplus SECAM ) 9. Using select line number 310 (PAL or SECAM) or 262 (NTSC) 10. Observe the trace, and check to see if the test tool triggers on line number 310 (PAL or SECAM, see Figure 4-14), or line number 262 (NTSC, see Figure 4-15). Figure 4-14. Trace for PAL/SECAM line 310 Negative Video Figure 4-15. Trace for NTSC line 262 Negative Video 4.6.14 Video test using SC600 Scope Calibration Option You can skip this test if you did test 4.6.13 Video test using the Video Pattern Generator. Only one of the systems NTSC, PAL, PALplus, or SECAM has to be verified. 4-24

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Fluke 19xB-19xC-2x5C
Service Manual
4-24
al-tv-ai.bmp
Figure 4-13. Test Tool Input A to TV Signal Generator Inverted
8.
Select the following test tool setup:
•
Press
to open the Trigger Options menu.
•
Choose
VIDEO on A...
, then from the shown opened menu choose
Polarity:
NEGATIVE |
PAL
(
or
NTSC
PALplus
SECAM
)
9.
Using
select
line number 310 (PAL or SECAM) or 262 (NTSC)
10.
Observe the trace, and check to see if the test tool triggers on line number 310 (PAL
or SECAM, see Figure 4-14), or line number 262 (NTSC, see Figure 4-15).
Figure 4-14. Trace for PAL/SECAM line 310
Negative Video
Figure 4-15. Trace for NTSC line 262 Negative
Video
4.6.14 Video test using SC600 Scope Calibration Option
You can skip this test if you did
test
4.6.13 Video test using the Video Pattern
Generator.
Only one of the systems NTSC, PAL, PALplus, or SECAM has to be verified.