Procedure - HP 70427A User Manual

Procedure

Downconverter Operation
AM Noise Measurement (IF AM Detector) User Control
Step 1 - Preset the Downconverter
First make sure the downconverter's ACT indicator is lit. If it isn't, do the
following:
1. Press the key.
DISPLAY
2. Press the
NEXT INSTR
indicator lights.
3. Press the
INSTR PRESET
Step 2 - Enter the input frequency
1. Press the softkey.
Freqs
2. Press the
INPUT FREQ
3. Enter the DUT's carrier frequency with the numeric keypad.
4. Press the , ,
GHz MHz
Step 3 - Enable the IF AM detector
1. Press the softkey.
AM Noise
2. Press the
AM NSE IN | IF
3. Press the softkey.
Freqs
Step 4 - Define the measurement
Follow the instructions in the HP 3048A manual together with the
information below:
1. Specify Measurement Type and Frequency Range
•
Measurement Type: AM Noise.
2. Enter Source and Interface Parameters
•
Carrier Frequency: DUT frequency.
•
Detector/Discr. Input Frequency: IF frequency.
•
Detector - External Phase / AM Detector.
3. Specify a Calibration Process
•
Phase Detector Constant: Derive from Double Sided Spur
•
Spur Amplitude: – 26 dBc
•
Spur Frequency: 1kHz
4. Specify the Control of Signal Sources
•
CAL sources: USERS DEVICE, MANUAL CONTROL
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softkey, repeatedly if necessary, until the ACT
key.
softkey.
or softkey.
kHz, Hz
softkey until the IF is underlined.