Power Meter Measurement Calibration - Agilent Technologies 8719D User Manual

Power Meter Measurement Calibration

You can use the power meter to monitor and correct the analyzer source power to achieve
calibrated absolute power at the test port. You can also use this calibration to set a reference
power for receiver power calibration, and mixer measurement calibration. The power meter
can measure and correct power in two ways:
continuous correction - each sweep mode
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sample-and-sweep correction - single sweep mode
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The time required to perform a power meter calibration depends on the source power,
number of points tested, and number of readings taken. The parameters used to derive the
characteristic values in lhble 5-5 are as follows:
number of points: 51, 50 MHz to 20.05 GHz
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test port power: equal to calibration power
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Power Desired
at l&t Port (dBm)
1 Sweep speed applies to every sweep in continuous correction mode, end
to the first sweep in sample-and+weep mode. Subsequent sweepa iu
sample-and-sweep mode will be much faster.
2 The txcmmcy values were derived by combining the accuracy of the
power meter and linearity of the analyzer's internal source, as well as
the mismatch uncertainty assa&ted with the power sensor.
Loss of Power CUbration Data
If your instrument state has not been saved after a power meter calibration,
the power correction data will be lost if any of the following circumstances
exists:
If you switch off the analyzer ac power and you haven't saved the correction
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in an internal register.
If you press w and you haven't saved the correction in an internal
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register.
If you change the sweep type (linear, log, list, CW, power) when the power
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meter correction is activated.
If you change the frequency when the sweep type is in log or list mode.
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1
2
3
1 1
-15 -15
2 2
3 3
1 1
-30 -30 2 2
3 3
97
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Optimizing Measurement Results 635