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Tune Sens
This softkey displays a menu of reference chain phase-lock-loop tuning
sensitivities. The choices are:
•
0 ppm: Chain is phase-locked to the 10 MHz reference with no external
tuning.
•
0.05 ppm/V: Chain is phase-locked to the 10 MHz reference and the 10
MHz reference can be tuned externally.
•
1.0 ppm/V: 600 MHz oscillator is phase-locked to the 100 MHz
oscillator and the 100 MHz oscillator can be tuned externally.
•
20 ppm/V: 600 MHz oscillator is free-running and can be tuned
externally.
•
100 MHz no tune: 600 MHz oscillator is phase-locked to the 100 MHz
oscillator with no external tuning.
•
600 MHz no tune: 600 MHz oscillator is free-running with no external
tuning.
Path
HP-IB commands
Where n is as follows:
Figure 10-83
Reference Chain
Ref Chain
Tune Sens
n
REF:TS
Tuning Sensitivity
100 MHz no tune
600 MHz no tune
HP 70427A/HP 70428A User's Guide 10-129
Softkeys and Displays
Tune Sens
n
0 ppm
0
0.05 ppm/V
1
1.0 ppm/V
2
20 ppm/V
3
4
5
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