HP 70427A User Manual page 552

Test 6 - Phase Noise and Spurs of Downconverter
•
Carrier frequency: will be entered later.
•
Detector/discr input frequency: 600 MHz.
•
VCO Tuning constant: will be entered later.
•
Center voltage of VCO tuning curve: 0 V.
•
Voltage tuning range of VCO: 2 V.
•
VCO tune-port input resistance: 1E6
•
Phase detector: Internal Phase Detector, 5 MHz to 1600
MHz.
3. Specify a calibration process
•
Method for determining phase detector constant: Measure
the detector constant.
•
Method for determining the VCO tuning constant:
Measure the VCO tuning constant.
•
PLL suppression: Will be verified.
4. Specify the control of signal sources
•
DUT: User's source, manual control.
•
REF SOURCE: User's source, manual control.
•
TUNE VOLTAGE: Ref source.
5. Define the graph of results
Title: will be entered later.
•
Minimum X coordinate: 1 Hz.
•
Maximum X coordinate: 40 MHz
•
Minimum Y coordinate: –170
•
Maximum Y coordinate: 0
•
Horizontal portion of display to be used: 100%
•
Vertical portion of display to be used: 100%
•
Graph type: Single sideband phase noise (dBc/Hz)
6. Enter the spec lines
Will be entered later.
Step 2 - Reference source initial configuration
1. Make the reference source the active MMS module (ACT indicator lit):
a. Press the
DISPLAY
b. Press the
NEXT INSTR
indicator lights.
key.
softkey until the reference source's ACT
HP 70427A/HP 70428A User's Guide 14-41
Performance Tests
Ω.