Agilent Technologies 53147A Assembly Level Service Manual page 69

NOTE
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Chapter 2 Service
Calibration Procedures
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 results are valid, the Agilent 53147A/48A/49A and the
test equipment should be powered on for at least 30 minutes prior to
beginning the calibration procedure. This allows the internal temperatures
of the equipment to stabilize.
Make sure the Agilent 432A Power Meter is 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 2-6 to
locate pin 1).
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Figure 2-6. 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).
Connect the Agilent 478A-H75 or 478A-H76 Thermistor Mount to the
Agilent 53147A/148A/149A Power Meter OUTPUT connector, as shown in
Figure 2-7.
Assembly Level Service Guide
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connector
RF
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