HP 70427A User Manual page 561

Performance Tests
Test 6 - Phase Noise and Spurs of Downconverter
Table 14-18 Phase Noise Measurement
Test No. & Description
Spurious
1. Uncertainty 4 dB at offsets >1 MHZ
14-50 HP 70427A/HP 70428A User's Guide
Carrier Offset
Frequency
(GHz)
25.8 100 kHz
25.8 1M Hz
25.8 40 MHz
25.8 100 Hz
25.8 1 kHz
≥ 10 kHz
25.8
Max. Results
Specs. Attach
φ -Noise
(dBc)
Plot
–125
–125
–125
–34
–55
–55
Measurement
Uncertainty
(±dB)
2
2
2
2
2
1
2 or 4