Table of Contents
Advertisement
6
Absolute Measurement Fundamentals
What Sets the Measurement Noise Floor?
What Sets the Measurement Noise Floor?
The System Noise
Floor
Table 6-1
Amplitude Ranges for L and R Ports
Phase Detector
50 kHz to 1.6 GHz
Ref Input (L Port)
Signal Input (R Port)
+
15 dBm
0 dBm
to
to
+
+
23 dBM
23 dBM
* Agilent 70420A phase noise test set Options 001 and 201with no attenuation
† Agilent 70420A phase noise test set Option 001 with no attenuation
6-6
E5500 Phase Noise Measurement System Version A.02.00
The noise floor for your measurement will be set by two things:
G
The noise floor of the phase detector and low-noise amplifier
(LNA)
G
The noise level of the reference source you are using
The noise floor of the system is directly related to the amplitude of
the input signal at the R input port of the system's phase detector.
Table 6-1
shows the amplitude ranges for the L and R ports.
1.2 to 26.5 GHz
Ref Input (L Port)
+
7 dBm
to
+
10 dBM
If the L port (reference input) signal is within the amplitude range
shown in the preceding table, the signal level at the R (signal) input
port sets the noise floor for the system.
*
Signal Input (R Port)
0 dBm
to
+
5 dBM
Document Part No. E5500-90024 Ed. 1.0
†
50 kHz to 26.5 GHz
AM Noise
0 dBm
to
20 dBM
Advertisement
Table of Contents
