Characteristic Power Meter Calibration Sweep Speed And Accuracy - HP 8753E User Manual

The speed and accuracy of a power meter calibration vary depending on the test setup and the
measurement parameters. For example, number of points, number of readings, if the power is
less than -20 dBm, continuous versus sample and sweep mode. Accuracy is improved if you
set the source power such that it is approximately correct at the measurement port. Power
meter calibration should then be turned on. With number of readings = 2, very accurate
measurements are achieved.
test setup for continuous correction or for the first sweep of sample-and-sweep correction.
The typical values given in l'hble 6-7 were derived under the following conditions:
HP 436A power meter
n
HP 8485A power sensor
n
Stimulus Parameters
The time required to perform a power meter calibration depends on the source power and
number of points tested. The parameters used to derive the typical values in 'lhble 6-7 are as
follows:
test port power: equal to calibration power
n

Characteristic Power Meter Calibration Sweep Speed and Accuracy

Power Desired
at lkst
I
1 Sweep speed applies to every sweep in continuous correction mode, and
to the fkst sweep in sample-and-sweep made. subsequent sweeps in
sample-and-sweep mode will be much faster.
2 The atxunwy values were derived by combining the accuracy of the
power meter and lineariw of the analyzer's internal source, as well as
the mismatch uncertainty associated with the power sensor.
Application and Operation Concepts
of Beadings Sweep Time Characteristic
Number
Port (dBm)
1
2
I
3
1
-16 2
3
1
-30 2
3
33
I 96
fO.l
43 0.7
l
92
123 fO.l
194
360
447 fO.l