Procedure - HP 53132A Assembly And Service Manual

Chapter 1 Performance Tests
Test 2: Trigger Level (HP 53131A/132A Only)

Procedure

1 Connect the output of the HP 3325B to Channel 1 of the Counter
as shown in Figure 1-6.
HP 53131A/132A
Counter
Channel 1
Figure 1-6. Trigger Level Test Setup
2 Set the HP 3325B to output a 1 MHz, 80 mVp-p square wave signal.
Set the HP 3325B DC OFFSET to −60 mV.
3
4 On the Counter, press Run key.
5 Now, increment the dc offset on the HP 3325B by +1 mV until the
Counter's Gate annunciator flashes and continue incrementing
until the Counter displays a stable reading of approximately
1 MHz.
Observe the offset value on the display of the HP 3325B.
Record the dc offset value__________ mV.
6 Add the upper peak voltage (40 mV) of the 80 mV p-p signal to the
offset value in step 5 (For example, −24 mV + 40 mV = 16 mV).
This is the upper hysteresis level.
Record the upper hysteresis level__________ mV.
1-20
HP 3325B
Synthesizer
Channel 2
Assembly-Level Service Guide
Output