HP 70427A User Manual page 525

Performance Tests
Test 2 - Phase Noise and Spurs (mW LO)
The softkey is under the results graph definition menu. Use the
Spec Lines
offsets from the result table for the offset frequency and the max spec from
the result table for the amplitude. Phase noise specs are entered in order, but
the spurious specs must be entered in reverse order with an extra point at 40
MHz.
5. Set tuning sensitivities to 1.0 ppm/V
a. Press the
Ref Chain
b. Press the
Tune Sens
c. Press the
1.0 ppm/V
d. If necessary, make the other module active by pressing the
key followed by the
6. Set the reference source and DUT frequency to 12.6 GHz
a. Press the
Output
b. Press the softkey.
FREQ
c. Enter 12.6 with the numeric keypad.
d. Press the softkey.
GHz
e. If necessary, make the other module active by pressing the
key followed by the
display the module's softkeys.
7. Run the phase-noise measurement
When the phase-noise measurement program stops to prompt a zero-beat
adjustment, do the following:
a. Turn the HP 70428A Option K01 on.
b. Adjust the pot on the HP 70428A Option K01 for a zero beat within
1200 Hz. If necessary, switch the NORMAL/REVERSE switch and
turn the pot in the other direction.
c. Press to continue with the measurement.
Proceed
8. Print a graph and parameter summary
On the HP 3048A controller press the
Step 6 - Measure Phase Noise at 2.4 GHz (20 ppm/V)
1. Specify measurement type and frequency range
•
Start freq: 10 Hz
14-14 HP 70427A/HP 70428A User's Guide
softkey.
softkey.
softkey.
softkey.
NEXT INSTR
softkey.
softkey. Press, the
NEXT INSTR
key and the
SHIFT
DISPLAY
DISPLAY
key to
MENU
softkey.
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