6
Operation
The Model 3211 consists of a current-limited,
high-voltage operational amplifier used in a
summing-amplifier configuration. As shown in
Fig.1, three signals are summed together at the
input and amplified: DC offset, Input 1, and Input 2.
The DC offset is adjustable from the front-panel
potentiometer, and Input 1 and Input 2 come from
the front-panel BNC jacks. The outputs consist of a
high-voltage output, a monitor output (which is
high-voltage output/30, or 1.5 times the sum of
the inputs), a +200 V DC current-limited output
and a -200 V DC current-limited output.
NOTE:
Before connecting the AC power cable, ver-
ify the the line voltage setting in the amplifier
agrees with the local voltage. (See Appendix 2:
Operating Voltages & Fuses.)
