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11
AM Noise Measurement Fundamentals
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
• Fastest method of calibration. If the same power levels are always at the AM
• 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
Procedure
1
DUT
E5505a_noise_sys_block
01 Mar 04 rev 1
Figure 222 Phase detector constant AM noise setup (method1, example 1)
2
290
detector.
detector, as in the case of leveled outputs, the AM detector sensitivity will
always be essentially the same.
signal.
Using information shown in
Connect the circuit and tighten all connections. If the N5500A Option 001
or N5507A is available, use one of the connection diagrams described in
Figure 217
on page 285.
AM detector
Measure the power which will be applied to the AM detector (see
on page 291). It must be between 0 and +23 dBm.
Figure 222
and
Figure 223
Test set
Noise
input
on page
291,
Figure 223
Agilent E5505A User's Guide
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