Power Meter Reference Level: Method 2 - Agilent Technologies 53147A Assembly Level Service Manual

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Chapter 1 Performance Tests
Test 5: Power Meter Reference Level

Power Meter Reference Level: Method 2

Equipment Required
Agilent 432A Power Meter
Agilent 478A-H75 or 478A-H76 Thermistor Mount
Agilent 34401A Digital Multimeter
Agilent 8120-1082 Power Sensor Cable
To ensure that the test results are valid, the instrument and the test
•
equipment should be powered on for at least 30 minutes prior to
beginning the tests. This allows the internal temperatures of the
equipment to stabilize.
• This test is appropriate for the Agilent 53147A, 53148A, and 53149A.
Turn the Agilent 432A Power Meter off. Do not turn it on until instructed
to do so.
Set the Agilent 34401A Digital Multimeter to measure resistance, and
connect the DVM test prods between the center pin of the V
on the Agilent 432A Power Meter rear panel and pin 1 on the thermistor-
mount end of the Agilent 8120-1082 Power Sensor Cable (see Figure 1-10
to locate pin 1).
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Figure 1-10. Agilent 8120-1082 Power Sensor Cable End View
Round off the resistance reading to two decimal places and keep a record
of this value as R. It is the internal bridge resistance (R) of the Agilent
432A Power Meter (this should be approximately 200.3 ohms).
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Assembly Level Service Guide
connector
RF