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Beginning the
Measurement
Document Part No. E5500-90024Ed. 1.0
If the output amplitude of your UUT is not sufficient to provide an
adequate measurement noise floor, it will be necessary to insert a
low-noise amplifier between the UUT and the test set. Refer to
"Inserting an Device" in
Fundamentals" for details on determining the effect the amplifiers
noise will have on the measured noise floor.
VCO Reference
In order for the noise measurement results to accurately represent
the noise of the UUT, the noise level of the reference source should be
below the expected noise level of the UUT.
1
From the Measurement menu, choose New Measurement
Figure 7-18
Figure 7-18 Selecting a New Measurement
2
When the Perform a New Calibration and Measurement?
prompt appears, click OK.
3
When the Connect Diagram dialog box appears, click on the
hardware down arrow and select your hardware configuration
from the pull-down list.
Confirm your connections as shown in the connect diagram. At
this time connect your UUT and reference sources to the test set.
The input attenuator (Option 001 only) has now been correctly
configured based on your measurement definition.
CAUTION:
The Agilent 70420A test set's signal input is subject to the
following limits and characteristics:
E5500 Phase Noise Measurement System Version A.02.00
Absolute Measurement Examples
Free-Running RF Oscillator
Chapter
6, "Absolute Measurement
7
See
.
7-25
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