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11
AM Noise Measurement Fundamentals
Method 1, example 2
Advantages
• Easy method of calibrating the measurement system.
• Will measure DUT without modulation capability.
• Requires little additional equipment: only a voltmeter or an oscilloscope.
• Fastest method of calibration. If the same power levels are always at the AM
• Measures the AM detector gain in the actual measurement configuration.
Disadvantages
• Has only moderate accuracy compared to the other calibration methods.
Procedure
1
2
DUT
E5505a_noise_sys_block
01 Mar 04 rev 1
Figure 225 Phase detector constant AM noise setup (method 1, example 2)
292
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.
Using
Figure 225
and
connections. If the N5500A Option 001 or N5507A is available, use one of
the connection diagrams described in
diagrams"
on page 285.
Measure the power which will be applied to the AM detector. It must be
between 0 and +23 dBm.
AM detector
Figure
226, connect circuit and tighten all
"AM noise measurement block
Test set
Noise
input
Agilent E5505A User's Guide
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