HP 8648 A/B/C/D - Changpuak.ch

HF Power Level
Accuracy
All HP 8648A/B/C/D
HF Power Level Accuracy
Description This is the power level accuracy adjustment for the power range
of 0 dBm to -130 dBm. The first step in this adjustment is to test
the noise floor level to ensure at least 20 dB separation between the
lowest measured power level and the spectrum analyzer noise floor. If
the noise floor does not allow for 20 dB of separation at -130 dBm,
then it is checked at -120 dBm. If there is not 20 dB of separation
at -120 dBm, the test will not be run. If, however, there is 20 dB of
separation at -120 dBm, the -130 dBm correction factors will be set
to the -120 dBm values.
Required Test Power Meter
Equipment Power Sensor
Spectrum Analyzer
Low Frequency Amplifier
High Frequency Amplifier
6 dB Attenuator
Procedure
POWER METER
POWER SENSOR
,
HP 8648
UNDER TEST
Figure 7-26.
HF Power Level Accuracy Test Setup
for Power Levels > -10 dBm
I Etput
Adjustments 7-27