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Table 3-3. Parameter Data for the Stable RF Oscillator Measurement Example
Step
1
2
3
4
5
Parameters
Measurement Type
Frequency Range
Start Freq.
Stop Freq.
Averages
Source Parameters
Carrier Frequency
Detector/Discr. Input Frequency
VCO Tuning Constant
Center Voltage of VCO Tuning Curve
Voltage Tuning Range of VCO
VCO Tune-Port Input Resistance
Internal Phase Detector
Phase Detector Constant
VCO Tuning Constant
PLL Suppression
Source Control
DUT
USER'S SRCE
MANUAL CNTRL
REF SOURCE
USER'S SRCE
MANUAL CNTRL
TIME BASE
NOT IN USE
Data
Phase Noise Using a Phase Lock Loop
1 Hz
100 E + 3 Hz
4
125 E + 6 Hz
125 E + 6 Hz
250 Hz/V
0 Volts
± 1 0 Volts
1 E + 6 ohms
5 MHz to 1600 MHz
Measure the Detector Constant
Measure the VCO Tuning Constant
Will be verified
DN CONV.
NOT IN USE
-
~l
HP 11848A
Z§^
TUNE VOLTAGE
Note: This example assumes the DUT will be controlled manually. If you wish for the DUT to
be controlled by the HP 3048A, select SYSTEM CNTRL for the DUT in the diagram, and
enter the appropriate Setup String including: Address, frequency, and amplitude settings.
Define Graph
Title
Minimum X
Maximum X
Minimum Y
Maximum Y
Graph Type
STABLE RF OSCILLATOR VERSUS SIMILAR
REFERENCE SOURCE.
1 Hz
100 E + 3 Hz
- 1 7 0
0
Single Sideband Phase Noise (dBc/Hz)
Signal Source Applications
3-17
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