HP 181A User Manual download pdf (Page 35)

Chapter 1 Performance Tests

HP 53131A/132A/181A Operational Verification

Assembly-Level Service Guide 1-13

1 MHz External Timebase Input (HP 53131A and HP 53181A

Only)

1 Connect the equipment as shown in Figure 1-4.

Figure 1-4. External Timebase Test Setup

2Cycle the POWER key to preset the Counter.

3 Set Synthesizer #1 (i.e., the HP 3325B connected to the rear-panel

Ref In input of the Counter via a 50

Ω

feedthrough) to output a

1 MHz, 200 mV rms sine wave signal.

4 Set Synthesizer #2 (i.e., the HP 3325B connected to Channel 1) to

output a 2 MHz, 100 mV rms square wave signal.

Verify the Counter displays a reading of approximately 2 MHz and the

ExtRef annunciator is lit.

5 For HP 53131A, mark Pass or Fail in the HP 53131A/132A

Performance Test Record on page 1-41, Test 8a.

Counter

Output

Channel 1

50Ω

Feedthrough

Ref. In

(rear panel)

HP 3325B

Synthesizer #1

Output

HP 3325B

Synthesizer #2

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HP 181A User Manual Page 35