Agilent Technologies E5503A Guía de usuario Pagina 224

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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 Table 7-18 on page 7-100).
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 Table 7-18).
e. Enter the Center Voltage of VCO (see Table 7-18).
f. Enter the Input Resistance of VCO (see Table 7-18).
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