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Adjustments
Manual Adjustments
HF Power Level Accuracy (All 8648A/B/C/D)
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 −30 dBm, then it is checked
at −20 dBm. If there is not 20 dB of separation at -120 dBm, the −130 dBm correction
factors will be set to the -120 dBm values.
Required Test Equipment
• Power meter
• Power Sensor
•Spectrum Analyzer
• Low Frequency Amplifier
• High Frequency Amplifier
• 6 dB Attenuator
Procedure
Figure 7-26. HF Power Level Accuracy Test Setup for Power Levels > −10 dBm
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