HP 70427A User Manual page 406

Limits
Characteristics
Operating
considerations
Figure 11-9
VOLTAGE CONTROL input
This connector accepts an external tuning voltage for the 10 MHz, 100 MHz,
or 600 MHz oscillators.
•
Maximum voltage: ±10 Volts
•
Maximum frequency shift (10 MHz): ±0.25 ppm
•
Maximum frequency shift (100 MHz): ±5 ppm
•
Maximum frequency shift (600 MHz): ±100 ppm
•
Input impedance: 100 kΩ
Oscillator selection
Press the softkey, then the
Ref Chain
by choosing tuning sensitivity as follows:
•
No external tuning: 0 ppm
•
10 MHz oscillator: 0.05 ppm/V
•
100 MHz oscillator: 1.0 ppm/V
•
600 MHz oscillator: 20 ppm/V
•
100 MHz No Tune: 0 ppm
•
600 MHz No Tune: 0 ppm
Reference Chain
Connectors and Indicators (Front- and Rear-Panel)
VOLTAGE CONTROL input
softkey. Select the oscillator
Tune Sens
HP 70427A/HP 70428A User's Guide 11-21