Agilent Technologies E8362B Service Manual page 68

Tests and Adjustments
Performance Tests (Agilent N2721A Software Package)
Equipment Used: The dynamic accuracy test set (Z5623A Option H01), a power meter
(E4418B or E4419B Option G12 or Option H12)
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
7. The power level is measured using the analyzer's receiver under test: (P
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
10. At each step, the power level is measured using the receiver under test: (P
11. The power error in dB = (P
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
Receiver Modules and LO Reject Filter Board" on page
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
1. This test requires a higher accuracy power meter than standard. Refer to
Equipment" on page 2-7
to the "Power Meter Accuracy Test" on page 3-37
3-36
−P −P
)−(P
mr md pr pd
"Removing and Replacing the A31, A32, A33, and A34
for specifications. If an Option G12 or H12 power meter is not available, refer
to verify the accuracy of a standard power meter.
PNA Series Microwave Network Analyzers
1
, power sensors, and two test cables.
).
mr
).
7-52. After swapping the
"Required Service Test
Service Guide E8364-90026
E8362B, E8363B, E8364B
).
pr
).
md
).
pd
7-18.