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Downconverter Operation
AM Noise Measurement (IF AM Detector) User Control
4. Repeat from step 1 until the reading on the
doesn't change from one reading to the next.
5. If necessary, increment/decrement the calibration source's output power.
6. Repeat steps 1 through 4 to read the detector's output at the new power.
7. Repeat steps 1 through 5 until the calibration source's detector voltage is
within ±5% of the DUT's detector voltage.
Step 9 - Run the calibration
Modulate the calibration source as follows:
•
Type: AM
•
Depth: 10%
•
Frequency: 1 kHz
Step 10 - Proceed with the measurement
Re-connect the DUT to the downconverter's SIGNAL input, retune the
downconverters to the DUT's output frequency, and proceed with the
measurement.
3-20 HP 70427A/HP 70428A User's Guide
display
AM Det Voltage:
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