
8712ET/ES and 8714ET/ES Adjustments
RF Network Analyzers Source Power Correction, Adjustment #104
Service Guide 2-15
Source Power Correction, Adjustment #104
In this adjustment, the analyzer creates a table of values that corrects the source output
power over different frequencies and power levels. For all ES models, separate tables of
values are created for the forward and reverse direction through the device under test
(DUT).
The analyzer reads values from a power meter to determine the actual source output level.
An HP/Agilent power meter is required for this test (see table below). Other power meters
will not be controlled correctly by the analyzer.
Required Equipment
Warmup Time
Allow the analyzer to warm up for one hour.
Estimated Adjustment Time
This adjustment takes approximately five to fifteen minutes to run, depending on the
installed options.
1. The EPM-441A and EPM-442A, with versions prior to A 2.02.00 firmware, cannot be
controlled by the analyzer. These versions do not have the 438A command set firmware.
These versions of firmware may be upgraded at a service center (see Chapter 9).
2. All ES models as well as the ET models with the 1E1 option have an RF step attenuator
installed. For these instruments, you will need an 8481D power sensor and an 11708A
30 dB reference attenuator to perform this adjustment procedure. The 11708A is sup-
plied with the power sensor.
3. The 10 dB attenuator is generally not needed, but may be required if the uncorrected
maximum output power level is unusually high for a given analyzer.
Equipment
Description
Recommended HP/Agilent Model or Part Number
For 50Ω Analyzers For 75Ω Analyzers
Power meter
1
E4418A (EPM-441A)
E4419A (EPM-442A)
437B or 438A
E4418A (EPM-441A)
E4419A (EPM-442A)
437B or 438A
Power sensor 8482A 8482A
High sensitivity power
sensor
2
8481D or 8484A 8481D or 8484A
10 dB attenuator
3
8491A Opt. 010 N/A
Minimum loss pad N/A 11852B
GPIB cable 10833A 10833A
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