HP manual HP 3325B HP 53181ASynthesizer Counter, Trigger Level Test Setup

Chapter 1 Performance Tests

Test 1: Trigger Level (HP 53181A Only)

Procedure

1Connect the output of the HP 3325B to Channel 1 of the Counter as shown in Figure 1-11.

HP 3325B

HP 53181ASynthesizer

Counter

1

Channel 1 Output

Figure 1-11. Trigger Level Test Setup

2Set the HP 3325B to output a 1 MHz, 80 mVp-p square wave signal.

3Set the HP 3325B DC OFFSET to −60 mV.

4On the Counter, press Run key.

5Now, 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 approximately 1 MHz.

Observe the offset value on the display of the HP 3325B. Record the dc offset value__________ mV.

6Add 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.

Assembly-Level Service Guide 1-49