Pulse Jitter Measurements - Tektronix 7D11 Instruction Manual

Operating Instructions-7011 Operators
Set the 7011 and the time-base unil 10 trigger from
4.
the signal source.
5.
Set the 7011 for TIME INT CLOCK operation in the
INDEPENDENT mode.
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a fasler sweep rate; Dlsplav blanked during delav intlJ<'lIal;
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Area Inle'eSI dlsplaved al faster sweep 'ille.
1-10
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6. Set the time-base unit to view several cycles of the
applied signal.
7. Set the 7011 TRIGGER controls to trigger the delay
start. The TRIG'D indicator will light when a trigger is
being produced.
8. Turn the DELAY TIME OR EVENTS control clock­
wise to blank that portion of the display preceding the area
of interest. The blanked portion of the display represents
the delay interval.
9. Set the B SWEEP
STARTS AFTER DELAY_ Set the time·base to a sweep
rate which displays the area of interest_
Example. Fig. 1-8(A! shows a complex waveform as
displayed on the CRT. The circled portion of the waveform
cannot be viewed in any greater detail because the sweep is
triggered by the larger amplitude pulses at the start of the
display; a faster sweep rate moves this area of the waveform
off the viewing area. Fig_ 1-8(S! shows the display blanked
out during the delay interval (delay interval is area between
the arrows). Fig. 1-8(C) shows the sweep triggered after the
delay at a faster sweep rate to display the area of interest.

Pulse Jitter Measurements

I n some applications. it
amount of jilter on tile leading edge of a pulse, or jilter
between pulses.
Use the following procedure:
1. Install an amplifier unit and the
compartments of a mainframe. Install a time-base unit in a
horizontal compartment_
2. Sel the mainframe for a dual-trace vertical display
mode .
3_ Connect the signal to the amplifier unil and to the
7011 EXT TRIG IN connector.
4. Set the time-base unit to trigger on the applied signal
at a sweep rate which displays the complete waveform.
DELAY MODE switch 10 B
is necessary to measure the
7011
in the vertical
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