User`s guide

188 Agilent E5505A User’s Guide
6 Absolute Measurement Examples
Microwave Source
This measurement example will help you measure the absolute phase noise of
a microwave source (2.5 to 18 GHz) with frequency drift of ≤10E – 9 X Carrier
Frequency over a period of thirty minutes.
Required equipment
This measurement requires an Agilent 8644A with a DCFM Input port, in
addition to the phase noise test system and your DUT. (For more information,
see the section “Selecting a reference source" on page 132.) You also need the
coaxial cables and adapters necessary to connect the DUT and reference
source to the test set.
Defining the measurement
1 From the File menu, choose Open.
2 If necessary, choose the drive or directory where the file you want is stored.
3 In the File Name box, choose “MicroSRC.pnm”. See Figure 132.
.
4 Click the Open button.
CAUTION
To prevent damage to the test set’s components, do not apply the input signal to
the signal input connector until the input attenuator has been correctly set for the
desired configuration, as shown in Tab l e 27 on page 195. Apply the input signal
when the connection diagram appears
NOTE
To ensure accurate measurements allow the DUT and measurement equipment to warm
up at least 30 minutes before making the noise measurement.
Figure 132 Select the parameters definition file