12-8
Agilent Technologies E5500 Phase Noise Measurement System
AM Noise Measurement Fundamentals
Method 1: User Entry of Phase Detector Constant
Method 1:
User Entry of Phase Detector Constant
Method 1, example 1
Advantages
•
Easy method of calibrating the measurement system
•
Will measure DUT without modulation capability.
•
Requires only an RF power meter to measure drive levels into the AM
detector.
•
Fastest method of calibration. If the same power levels are always at the
AM detector, as in the case of leveled outputs, the AM detector
sensitivity will always be essentially the same.
•
Super-quick method of estimating the equivalent phase detector
constant.
Disadvantages
•
It is the least accurate of the calibration methods.
•
It does not take into account the amount of power at harmonics of the
signal.
Procedure
1. Connect circuit as shown in
, and tighten all connections. If
the Agilent/HP 70420A Option 001 or Agilent/HP 70427A is available,
use one of the connection diagrams described in
Measurement Block Diagrams” on page 12-3
.
Figure 12-6
User Entry of Phase Detector Constant AM Noise Measurement Setup
Method 1, Example 1
2. Measure the power which will be applied to the AM detector. It must be
between 0 and +23 dBm.
