Tektronix 2337, Instruction Manual

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Time Difference Between Two Time-Related Pulses
The calibrated sweep speed and dual-trace features of
the 2237 allow measurement o f the time difference
between two separate events. To measure time difference,
use the following procedure:
1. Preset instrument controls and obtain a Normal
Sweep Display.
2. Set the A TRIGGER SOURCE switch to CH 1.
3. Set both AC-GND-DC switches to the same position,
depending on the type o f coupling desired.
4. Using either probes or cables w ith equal time delays,
connect a known reference signal to the Channel 1 input
and the comparison signal to the Channel 2 input.
5. Set both VO LTS/DIV switches fo r 4- or 5-division
displays.
6. Select either A LT or CHOP VE R TIC A L MODE,
depending on the frequency of input signals (or select
AUTO VER TICAL MODE if automatic selection is desired).
7. If the two signals are o f opposite polarity, press in
the CH 2 INVERT push button to invert the Channel 2
display (signals may be o f opposite polarity due to 180°
phase difference; if so, note this fo r use later in the final
calculation).
8. Adjust the A TRIGGER LEVEL control fo r a stable
display.
9. Set the A T IM E /D IV switch to a sweep speed which
provides three or more divisions o f horizontal separation
between the reference points on the two displays. Center
each o f the displays vertically (see Figure 19).
10. Measure the horizontal difference between the two
signal reference points and calculate the time difference
using the following formula:
SEC/DIV horizontal
switch x difference
Time _ setting______ (divisions)
Difference magnification factor
EXAMPLE: The A SEC/DIV switch is set to 50 /is,
the X10 MAG switch is pressed in and the horizontal
50
2337 Operators
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