20-2
Agilent Technologies E5500 Phase Noise Measurement System
System Specifications
Specifications
Specifications
Reliable Accuracy
The Agilent E5500 phase noise system minimizes measurement uncertainty
by assuring you of accurate and repeatable measurement results.
Measurement
Qualifications
In order for the E5500 to meet its accuracy specifications, the following
qualifications must be met by the signal sources you are using.
•
Source Return Loss: 9.5 dB (<2:1 SWR)
•
Source Harmonic Distortion <–20 dB (or a square wave)
•
Nonharmonic spurious
≤
-26 dBc (except for phase modulation close to
the carrier.
If either of these conditions are not met, system measurement accuracy may
be reduced.
Tuning
The tuning range of the voltage-controlled-oscillator (VCO) source must be
commensurate with the frequency stability of the sources being used. If the
tuning range is too narrow, the system will not properly phase lock, resulting
in an aborted measurement. If the tuning range of the VCO source is too
large, noise on the control line may increase the effective noise of the VCO
source.
Table 20-1
RF Phase Detector Accuracy
RF Phase Detector Accuracy
Frequency Range
Offset from Carrier
.01 Hz to 1 MHz
±
2 dB
1 MHz to 100 MHz
±
4 dB
Table 20-2
AM Detector Accuracy
AM Detector Accuracy
Frequency Range
Offset from Carrier
.01 Hz to 1 MHz
±
3 dB
1 MHz to 100 MHz
±
5 dB
