Agilent Technologies E5500 Phase Noise Measurement System
7-99
Absolute Measurement Examples
Microwave Source
a.
From the Define menu, choose Measurement; then choose the
Sources tab from the Define Measurement window.
b. Enter the carrier (center) frequency of your UUT (5 MHz to
1.6 GHz). Enter the same frequency for the detector input
frequency.
c.
Enter the VCO Tuning Constant (see
).
Use the following equation to calculate the appropriate VCO Tuning
Constant to enter for the measurement.
❍
VCO Tuning Constant = T x Carrier Frequency
❍
Where T= 5E-9
For example, to calculate the Tuning Constant value to enter for EFC
tuning when the center frequency is 18 GHz:
❍
(5 E - 9) X (18 E + 9) = 90
d. Enter the Tune Range of VCO (see
).
e.
Enter the Center Voltage of VCO (see
).
f.
Enter the Input Resistance of VCO (see
).
