Keysight N5227B, Service Manual

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Keysight N5227B Service Guide 3-49
Tests and Adjustments
Adjustments
Receiver Adjustment
The receiver calibration is used to adjust the network analyzer receivers for a
flat response across its full frequency range:
1. A power meter/sensor is connected to Port 1, as shown in Figure 3-17 , to
establish a reference for flatness.
2. A cable is inserted between the power sensor and the test port, as shown
in Figure 3-18 , to establish a reference for the cable.
3. The same cable is connected between test port 1 and test port 2, as
shown in Figure 3-19 , and a signal from Port 1 is used to adjust the “B”
receiver at Port 2.
The adjustment is repeated using a signal from Port 2 to adjust the “A”
receiver at Port 1.
Data obtained during this adjustment are stored in the mxcalfile_pxx files in
flash memory on the test set motherboard, with a backup copy stored on the
hard disk drive. The data are used in subsequent measurements.
Solid state drives can be swapped or replaced without concern for the
mxcalfile_pxx files. If the test set motherboard is replaced, the PNA firmware
will automatically create new primary mxcalfile_pxx files from the backup
copies on the hard drive.
These files can be recreated by performing another receiver calibration
adjustment.
Equipment Used for the Receiver Adjustment
Equipment Type Model or
Part Number
Alternate Model Part
Number
Power meter E4418B/E4419B E4418A/E4419A
Power sensor, Type-N 8482A None
Power sensor, 2.4 mm 8487A None
Power sensor, V-Band
a
V8486A None
Adapter
a
WR-15 to 1.85 mm (m)
V281B None
Adapter, 2.4 mm (f) to 2.4 mm (f) 11900B 85056-60007
Adapter, Type-N (f) to 2.4 mm (f)
b
11903B None
Adapter, 1.85 mm (f) to 1.85 mm (f) 85058-60114 None
Test cable, 2.4 mm (f) to 2.4 mm (f) 85133C 85133E
Test cable 1.85 mm (f) to 1.85 mm (f) N4697E N4697-60200
a. This sensor and adapter must be calibrated together by the Keysight factory. The data supplied is
only valid as long as the sensor and adapter remain connected.
b. The 1.85 mm connector has the same ruggedness and is compatible with the 2.4 mm connectors.
1.85 mm and 2.4 mm adapters are interchangeable.