HP 54600A - Page 51

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Figure 26
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Operating Your Oscilloscope
To nalyze video waveforms
Polarity Selects either positive or negative sync pulses.
Field 1 Triggers on the field 1 portion of the video signal.
Field 2 Triggers on the field 2 portion of the video signal.
Line Triggers on all the TV line sync pulses.
BF Rej Controls a 500kHz low pass filter in the trigger path.
5 Set the time base to 200 ,us/div, then center the signal on the
display with the delay knob (delay about 800 ,us).
6 Press I Main/Delayed I , then press the Delayed softkey.
7
Set the delayed sweep to 20 ,us/div, then set the expanded
portion over the VITS (delay about 988.8 p.s).
1 l.OOV
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. : ..
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1 o o o o o o 1 I o 1 o o I o o o o I o o o o o o I I o o o I I o o o I I I o o
I I 0 I I I It I 1 I I I I 1 tIt I 1 I I I I o 0 I It I o t I I I' I I It I I I I I 0 I
1
•• I. I. I I. I I ••• I I I I •• I. I. I I ••• I I'. I •••• I ••• I I ••••
Secoad vertlcallaterval wladowed oa tile VITS
51