Agilent Technologies E8362C, Руководство по обслуживанию

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Service Guide E8364-90038 3- 37
PNA Series Microwave Network Analyzers Tests and Adjustments
E8362C, E8363C, E836C Performance Tests (Agilent N7840A Software Package)
Dynamic Accuracy Test
Function of the Test: To measure the relative power linearity of the analyzer’s receivers.
Specification Tested: Test Port Input–Dynamic Accuracy
Equipment Used: The dynamic accuracy test set (Z5623A Option H01), a power meter (E4418B or E4419B,
power sensors, and two test cables.
Description of the Test:
1. The analyzer’s test ports are tested separately at a specific CW frequency and a reference power level of
-20 dBm.
2. The analyzer’s driving port is connected to the dynamic accuracy test set’s source port and the
analyzer’s receiving port is connected to the dynamic accuracy test set’s receiver port. A power sensor
is connected to the dynamic accuracy test set’s power meter port.
3. The dynamic accuracy test set is used to input a signal from the driving port on the analyzer. The input
signal is routed through step attenuators to both the analyzer and a power sensor.
4. The analyzer source and the dynamic accuracy test set create power levels that are “deltas” from the
reference power level of -20 dBm. Each delta is measured two ways: by the power sensor and by the
analyzer’s receiver under test.
5. The analyzer’s power level into the port under test is set to the -20 dBm reference level.
6. The power level is measured with the power sensor: (P
mr
).
7. The power level is measured using the analyzer’s receiver under test: (P
pr
).
8. The power level into the analyzer’s port under test is stepped, in 5 dB steps, over the range of 0 to -120
dBm. Each power level represents a “delta” from the reference level.
9. At each step, the power level is measured using the power meter: (P
md
).
10. At each step, the power level is measured using the receiver under test: (P
pd
).
11. The power error in dB = (P
mr
-P
md
)-(P
pr
-P
pd
).
If the Analyzer Fails this Test:
• A failure of this test indicates a failure of one or more of the following assemblies.
• A31 channel A receiver
• A34 channel B receiver
• A6 SPAM board
• Since all four receivers are identical, the channel A and channel B receivers can be swapped with the
channel R1 and channel R2 receivers to determine if they are the cause of the failure. Refer to
“Removing
and Replacing the A31, A32, A33, and A34 Receiver Modules and A49 IF Multiplexer Board” on
page 7-54
. After swapping the receivers, repeat this test.
• If the analyzer still fails this test, replace the A6 SPAM board and repeat this test. Refer to “Removing
and Replacing the A6, A8, A9, and A10 Boards” on page 7-18 .