Tektronix 2335, Instruction Manual, Page: 60 / 104

difference between waveform measurement points is 4.5
divisions.
Substituting the given values in the formula:
Time 5 0 /ts/div x 4.5 div _
= ----- —-------------- = 2 2 .5 /is
Difference 10
Phase Difference
In a similar manner to "Tim e Difference," phase com­
parison between tw o signals o f the same frequency can be
made using the dual-trace feature o f the 2335. This method
o f phase difference measurement can be used up to the
frequency lim it o f the vertical system. To make a phase
comparison, use the following procedure:
Figure 18. Time difference between two time-related pulses.
1. Preset instrument controls and obtain a Normal
Sweep Display, then set the A TRIGGER SOURCE switch
to CH 1.
2. Set both AC-GND-DC switches to the same position,
depending on the type o f coupling desired.
3. Using either probes or coaxial cables w ith equal time
delays, connect a known reference signal to the Channel 1
input and the unknown signal to the Channel 2 input.
4. Select either A L T or CHOP VE R TIC A L MODE,
depending on the frequency o f the input signals (or select
AUTO VERTICAL MODE if automatic selection is desired).
The reference signal should precede the comparison signal
in time.
2335 Operators
47