5.5 Receiver Calibration
When you perform absolute power measurements (See section 4.7.3), the gain of some
receivers are factory calibrated to test port inputs.
In practice, the power is measured at test port inputs made by the fixture producing
losses. The receiver calibration enables the user to measure the power at port inputs
with higher accuracy.
The receiver calibration is performed by sending the calibration signal from the source
port to the calibrated port input. The receiver calibration requires the connection
between the both test ports using THRU line.
To make the receiver calibration most accurate, first perform power calibration on the
source port. If the source power calibration was not performed, to get good results you
need to connect the calibrated port to the source port on the front panel.
After the receiver calibration is complete, receiver correction automatically turns on.
Later the user can disable or enable again the receiver correction function.
The receiver calibration can be performed only for the test signal receivers (A and B) of
each port (See figure 4.11).
The power calibration is performed for each port and each channel individually.
Note The power correction status is indicated in the trace status
field (See section 4.2.2) and in the channel status bar (See
section 4.2.6).
5.5.1 Receiver Calibration Procedure
Connect a THRU line between the receiver port and the source port.
To select the calibrated port number, use the
following softkeys:
Calibration > Receiver Calibration > Select Port
To select the source port number, use the following
Calibration > Receiver Calibration > Source Port
To execute receiver calibration, use the following
Calibration > Receiver Calibration > Take Cal Sweep
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