Instruction manual

Chapter 1 Performance Tests
Agilent 53131A/132A/181A Operational Verification
Assembly-Level Service Guide 1-13
1
1 MHz External Timebase Input (Agilent 53131A and 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 Agilent 3325B connected to the rear-panel Ref In
input of the Counter via a 50Ω feedthrough) to output a 1 MHz, 200 mV rms sine
wave signal.
4 Set Synthesizer #2 (i.e., the Agilent 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 Agilent 53131A, mark Pass or Fail in the Agilent 53131A/132A Performance
Test Record on page 1-41, Test 8a.
C
ounter
Output
Channel 1
50Ω
Feedthrough
Ref. In
(rear panel)
HP 3325B
Synthesizer #1
Output
HP 3325B
Synthesizer #2