Table of Contents
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Defining the Measurement
2.
3.
1. Press the Define Msrmnt key which is available at the
Main Software Level on the HP 3048A.
Press the
Test Files
key.
Move the cursor down until it is positioned at the
file labeled HP EXAMPLE FREE-RUNNING RF
OSCILLATOR. The appropriate measurement definition
parameters for this example have been prestored in this
file.
4. Press the Load File key.
5. After the system has completed the file loading
sequence, press the
Done
key. (Table 3-5 lists
the parameter data that has been entered for this
measurement example.) Note that the Carrier Frequency
and VCO Tuning Constant entered for step 2 on the
table may not be appropriate for measuring your device.
6. To change these values, press the Instr. Params key.
7. Enter the carrier (center) frequency of your DUT
(5 MHz to 1.6 GHz). Enter the same frequency for the
Detector Input Frequency.
8. Enter the appropriate VCO Tuning Constant for the
HP 8640B. The tuning constant value is the DC FM Peak
Deviation setting on the HP 8640B. The following table
will help you select the appropriate Peak Deviation
setting for your instrument. (The correct center
frequency setting for the HP 8640B is the DUT
frequency.)
Signal Source Applications
3-29
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