Specifications

Center Voltage of VCO Tuning Curve is the center voltage of the tuning curve
of the VCO or the voltage required at the tune port input to set the VCO
to the desired carrier frequency for the measurement. A 0 volt entry allows
the maximum Voltage Tune Range available from the HP 11848A. Entries
other than zero restrict the Voltage Tune Range as described below:
Center Voltage
<2V
>2V
Maximum Voltage Tuning Range
±10V
±12V - Center Voltage
Voltage Tuning Range of VCO is the ± peak voltage available to tune the
VCO. This entry along with the VCO Tuning Constant determines the
Peak Tuning Range available.
VCO Tuning Constant x Voltage Tuning Range « Peak Tuning Range
NOTE
Prior to initiating a New Measurement at the HP 11848A
Tune Voltage Output port, an output voltage of as high
as ±12V may be present at the HP 11848A Tune Voltage
output port from a previous measurement setting. It is
recommended that you wait to connect the VCO's tune
port to the Tune Voltage output until the Connect Diagram
appears to avoid possible damage to your VCO.
The Tune Voltage Output port on the rear panel of the
HP 11848A provides an inverted output of the tune voltage.
Instr. Params: $N w/PLL 2-17