HP manual MHz External Timebase Input HP 53131A and HP 53181A Only

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Chapter 1 Performance Tests

HP 53131A/132A/181A Operational Verification

5’ For HP 53181A, mark Pass or Fail in the HP 53181A Performance Test Record on page 1-71, Test 5a.

5 MHz External Timebase Input (HP 53131A and HP 53181A Only)

1Change the frequency of Synthesizer # 1, which is connected to the Counter’s rear-panel Ref In input to 5 MHz.

2On the Counter, press Run key.

Verify the Counter displays a reading of approximately 2 MHz and the ExtRef annunciator is lit.

3For HP 53131A, mark Pass or Fail in the HP 53131A/132A Performance Test Record on page 1-41, Test 8b.

3’ For HP 53181A, mark Pass or Fail in the HP 53181A Performance Test Record on page 1-71, Test 5b.

10 MHz External Timebase Input (HP 53131A and HP 53181A Only)

1Change the frequency of Synthesizer #1, which is connected to the Counter’s rear-panel Ref In input to 10 MHz.

2On the Counter, press Run key.

Verify the Counter displays a reading of approximately 2 MHz and the ExtRef annunciator is lit.

3For HP 53131A, mark Pass or Fail in the HP 53131A/132A Performance Test Record on page 1-41, Test 8c.

3’ For HP 53181A, mark Pass or Fail in the HP 53181A Performance Test Record on page 1-71, Test 5c.

4Disconnect the test setup.

This completes the Operational Verification for the HP 53131A and HP 53181A.

1-14 Assembly-Level Service Guide