Chapter 1 Performance Tests
Test 5: Power Meter Reference Level
Assembly Level Service Guide
1-37
1
19
Disconnect the Multimeter’s negative test lead from the 432A Power Meter’s
V
RF
connector, and connect it to the 432A Power Meter’s chassis ground.
20
Observe the reading on the Multimeter, and keep a record of this value
as V
COMP
.
21
Calculate the output level of the 53147A/148A/149A’s power reference
oscillator (Prf ) using the following formula:
Where:
Prf
=
2 V
comp
( V
1
– V
0
) + V
0
2
– V
1
2
4R (Calibration Factor)
Prf = Power reference oscillator output level
Vcomp = previously recorded value
V1 = previously recorded value
V0 = previously recorded value
R = previously recorded value
CalibrationFactor = value for thermistor mount at 50 MHz (traceable to NIST)
Summary of Contents for 53147A
Page 6: ...Contents vi Assembly Level Service Guide ...
Page 13: ...1 Performance Tests Verifying Specifications ...
Page 55: ...2 Service ...
Page 88: ...Chapter 2 Service Troubleshooting the Instrument 2 34 Assembly Level Service Guide 2 ...
Page 89: ...3 Replacing Assemblies Disassembly and Reassembly ...
Page 104: ...Chapter 3 Replacing Assemblies Removing the Power Supply 3 16 Assembly Level Service Guide 3 ...
Page 105: ...4 Replaceable Parts ...
Page 116: ...Chapter 4 Replaceable Parts Parts Identification 4 12 Assembly Level Service Guide 4 ...
Page 117: ...5 Backdating ...
Page 119: ...6 Specifications ...
Page 125: ...A Rack Mounting the Instrument ...
Page 134: ...Index Index 4 Assembly Level Service Guide Index ...