HP 70427A User Manual page 130

AM Noise Measurement (Input AM Detector) System Control
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Detector: HP 70427A Input AM Detector
4. Specify a Calibration Process
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Phase Detector Constant: Derive from Double Sided Spur
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Spur Amplitude: –26 dBc
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Spur Frequency: 1 kHz
5. Specify the Control of Signal Sources
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AM Detector: HP 70427A, SYSTEM CONTROL
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CAL source: HP 8662A, MANUAL CONTROL
70727A Parms
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Spectrum Analyzer View: None
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Auto/Manual Input Attenuation and IF Gain: AUTO
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Input Attenuation: determined by the system if AUTO is selected.
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AM Detector Maximum Level: system enters the default value.
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System Spectrum Analyzer Connection Port: HP 11848A
Step 2 - Begin a new measurement
When the HP 3048A software pauses at the system connect diagram,
connect the DUT to the downconverter's SIGNAL input and make any other
connections shown that haven't been done yet.
Also, set the DUT power to + 10 dBm. The downconverter's AM detector is
specified at an input level of + 10 dBm, but it will work with input levels as
low as 0 dBm.
Step 3 - Autorange the downconverter
Press the
DC AUTO RANGE
This will trigger a one-time autoranging of the downconverter's input
attenuator and IF gain.
Downconverter Operation
softkey on the HP 3048A controller.
HP 70427A/HP 70428A User's Guide 3-31