7-24
Agilent Technologies E5500 Phase Noise Measurement System
Absolute Measurement Examples
Free-Running RF Oscillator
Free-Running RF Oscillator
This measurement example will help you measure the phase noise of a
free-running RF oscillator with frequency drift >20 ppm over a period of
thirty minutes.
CAUTION
To prevent damage to the Agilent/HP 70420A test set’s hardware
components, the input signal must not be applied to the signal input
connector until the input attenuator has been correctly set for the desired
configuration, as show in
. Apply the input signal
when the Connection Diagram appears.
Required Equipment
The following equipment is required for this example in addition the phase
noise test system and your unit-under-test (UUT).
NOTE
To ensure accurate measurements, you should allow the UUT and
measurement equipment to warm up at least one hour before making the
noise measurement.
Table 7-5
Required Equipment for the
Free-Running RF Oscillator
Measurement Example
Equipment
Quantity
Comments
Agilent/HP 8644B
1
Refer to the “
for
more information about reference
source requirements
Coax Cables
And adequate adapters to connect
the UUT and reference source to
the test set.
