3-34 Service Guide E8361-90001
Tests and Adjustments PNA Series Microwave Network Analyzers
Performance Tests (Agilent N2721A Software Package) E8361A
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 Option G12 or Option H12)
1
, 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 power
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
).
1. This test requires a higher accuracy power meter than standard. Refer to “Required Service Test
Equipment” on page 2-6 for specifications. If an Option G12 or H12 power meter is not available, refer
to the “Power Meter Accuracy Test” on page 3-36 to verify the accuracy of a standard power meter.
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