319
Select the polarity and
graticule type
8.
Select Normal or Inverted polarity:
Normal generally triggers on negative polarity, since
the sync pulse leading edge is negative for most
standard formats.
Use Inverted when probing circuitry that inverts the
video signal.
9.
All graticule types are available for selection from the
drop-down list. The IRE graticule is normally used with
NTSC signals, and the mV graticule is normally used with
all other video signals.
Set mode and holdoff
10.
Mode and holdoff can be set for all standard trigger types.
Refer to trigger mode on page 137 and Set holdoff on page
122 to learn more about trigger mode and holdoff.
Triggering on a Sequence
Use this procedure to set up the instrument to trigger on a sequence.
Prerequisites
1.
The instrument must be installed with a signal connected
to an input channel. Set the acquisition system to RUN,
and set the vertical and horizontal controls appropriately
for the signal to be acquired.
To trigger on A (main)
only
1.
Click Trig on the toolbar, and select the A->B Seq tab of the
Trigger Setup control window.
2.
Click A Only to turn off sequential triggering.
To trigger on B after time
1.
To set the time base to run after an A trigger, a trigger delay,
and a B trigger, click Trig on the toolbar, and select the A-
>B Seq tab of the Trigger Setup control window.
2.
Click Trig After Time.
3.
To set the trigger delay, click Trig Delay and use the
multipurpose knob or pop-up keypad to set the time.
4.
To set the B trigger level, click B Trig Level and use the
multipurpose knob or pop-up keypad to set the level.
Summary of Contents for TDS5000B Series
Page 36: ...36 AFTDS Differential Signal Adapter...
Page 280: ...280 Blackman Harris window...
