Fluke PM3082 Service Manual page 456

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6.3.36 MTB/DTB triggering; trigger sensitivity TVL-TVF
This test chocks the trigger sensitivity for television line- and field synchronization pulses.
test equipment:
TV pattern generator with video output (PM5418)
test set-up:
PM5418
settings/procedure:
1 - Apply a video signal to input CH1 with an amplitude of about 1V synchronization pulse
amplitude; use a 75£2 termination.
2 - Press the AUTOSET key.
3 - Select 'tv' twice in the menu under the TRIGGER MTB menukey.
4 - Select 'pos' or 'neg' (depends on employed generator) in the TRIGGER MAIN TB menu. The
generator must be in 'pal' system mode.
5 - Select in the TRIGGER MAIN TB menu'field T,'field 2' o r 'lines'.
requirements:
Decrease the amplitude of the input signal and verify that the signal is well-triggered on the narrow
TV line and the wide TV field pulse, at sync pulse amplitudes of 0.7 divisions and more.
Repeat settings/procedure with the generator in 'ntsc' mode.
settings/procedure:
6 - Select 'field T, 'field 2' in the TRIGGER MAIN TB menu. The generator must be in 'pal' system
mode.
7 - Press menu key DTB and select in the belonging menu DEL'D TB 'on', MAIN TB 'on' and
'tvline'.
8 - Adjust the vertical position of the MTB display with the CH1 POS control in the top half of the
viewing area.
9 - Adjust the vertical position of the DTB display with the TRACE SEPARATION keys (or the
TRACK control).
requirements:
Decrease the amplitude of the input signal and verify that the signal is well-triggered on the narrow
TV line pulse, at sync pulse amplitudes of 0.7 divisions and more.
Repeat settings/procedure with the generator in 'ntsc' mode.
OSCILLOSCOPE UNDER TEST
750 CABLE
PERFORMANCE TEST