Vco; Precautions To Be Taken On Inputs; Sync Output Use - Promax GF-941 Manual De Instrucciones

4.3.5

VCO

Main generator frequency can be changed when applying a 0 to -2 V range voltage
on connector [22] (at the rear panel). The highest specified variation is 2 decades (100:1).
It is very important to use a noiseless external voltage in order to minimize frequency
unwanted variations.
When a zero voltage is applied at the VCO input, output frequency will keep on the
value presettled by [2]. When this control is set at the upper and, highest frequency
variation can be achieved on applying an external voltage.
4.3.6

Precautions to be taken on inputs

All connectors used as an input ALLOW A MAXIMUM ± 10 V VOLTAGE LEVEL.
THE DEVICE IS LIKELY TO BE DAMAGED IF THIS VALUE IS OVERRUN.
4.3.7

SYNC output use

Connector [21] provides a square signal with outstanding rise and fall times, it
keeps main generator symmetry ratio and has a 50 Ω impedance, so that same
precautions shall be taken with cables as for the main output.
The supplying signal is in phase opposition with the main square signal and its rise
and down transitions are suiting with positive and negative peaks, respectively, of the
generator sine or triangular signals.
It may be used for auxiliary functions like synchronism or to be measured by means
of a frequency-counter for cases where it is necessary to know the signal frequency value
more exactly.
Page 18
USER'S MANUAL GF-941
04/2003