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Servicing
Performance Tests
Test 4. Electrical Return Loss (DIGITAL IN)
1
Press the
PRESET
key on the Agilent 8752C network analyzer.
2
With averaging on, calibrate the Agilent 8752C for a 1-port reflection
measurement at the end of the RF output cable. Use the calibration termination
kit. A through calibration is not required.
3
Connect the equipment as shown in the following figure.
Figure 5-6. Equipment setup
4
Press the Agilent 83430A’s front-panel
SELECT
key so that the
DIGITAL IN AC
COUPLED
light is on.
5
Restart averaging on the Agilent 8752C.
6
Confirm that the return loss meets the following requirements:
≤
1.0 GHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >12.07 dB
1 GHz to 2 GHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >9.07 dB
2 GHz to 2.5 GHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >6.07 dB
7
Disconnect the RF cable from the
DIGITAL IN AC COUPLED
connector, and
reconnect the cable to the
DIGITAL IN DC COUPLED
connector.
8
Press the Agilent 83430A’s front-panel
SELECT
key so that the
DIGITAL IN DC
COUPLED
light is on.
9
Restart averaging on the Agilent 8752C.