HP 70427A User Manual page 524

NOTE
Table 14-5
Step 5 - Measure Phase Noise at 12.6 GHz (1 ppm/V)
Remove the 10 dB attenuator and connect the HP 11848A TUNE OUTPUT
directly to the reference source's VOLTAGE CONTROL input.
1. Specify measurement type and frequency range
•
Start freq: 10 Hz
2. Enter source and interface parameters
•
Carrier frequency: 12.6 GHz
•
Detector/discr input frequency: 12.6 GHz
•
VCO Tuning constant: 12.6 kHz/Volt
•
Voltage tuning range of VCO: 2.0 V
3. Define graph of results
•
Title: 12.6 GHz carrier with 1.0 ppm tuning.
•
Minimum X coordinate: 1 Hz.
4. Enter spec lines
Spec Lines: 12.6 GHz Phase Noise and Spurs (Test 2)
Point Offset Frequency
(Hz)
1 1
2 10
3 100
4 1E3
5 10E3
6 100E3
7 1E6
8 40E6
9 40E6
10 1E3
11 100
Test 2 - Phase Noise and Spurs (mW LO)
Amplitude
(dBc/Hz)
+19
–31
–81
–111
–123
–135
–138
–138
–70
–70
–40
HP 70427A/HP 70428A User's Guide 14-13
Performance Tests