HP 70427A User Manual page 573

Performance Tests
Test 8 - Phase Noise and Spurs (RF)
6. Set the DUT output frequency to 2.4 GHz
a. Press the
Output
b. Press the
OUTPUT FREQ
c. Enter 2.4 with the numeric keypad.
d. Press the softkey.
GHz
7. Run the phase-noise measurement
When the phase-noise measurement program stops to prompt a zero-beat
adjustment, do the following:
a. Make sure that the HP 70428A Option K01 is turned ON.
b. Adjust the pot on the HP 70428A Option K01 for a zero beat within
0.4 Hz. If necessary, switch the NORMAL/REVERSE switch and
turn the pot in the other direction. A procedure is described in the
HP 3048A operating manual page 3-25 that will help set the beat
frequency using the time record displayed on the HP 3561A.
c. Please softkey to continue measurement.
Proceed
8. Print a graph and parameter summary
On the HP 3048A controller press the
softkey.
Step 6 - Measure phase-noise at 9.6 GHz
1. Specify measurement type and frequency range
•
Start freq: 10 Hz
2. Enter source and interface parameters
•
Carrier frequency: 9.6 GHz
•
Detector/discr input frequency: 9.6 GHz
•
VCO tuning constant: 160 Hz
3. Define graph of results
•
Title: HP 70428A/002, 9.6 GHz with .05 ppm/V tuning.
4. Enter spec lines
14-62 HP 70427A/HP 70428A User's Guide
softkey.
softkey.
key and the
SHIFT Hard Copy