Control Unit for Photon Technology International OC4000 Optical Chopper

PTI's Optical Chopper is ideal for a variety of optical applications. The unit is simple
to install and operate. A standard 5 volt TTL output provides compatibility with lock-in
amplifiers, signal averagers, oscilloscopes, computers and other TTL compatible
equipment.

The control unit features an LED readout for direct frequency readings, a wide-range
speed control, a phase adjuster and an internal/external control selector. External input
allows the chopper speed to be regulated by computers or other outboard equipment; speed
is controlled by applying 0 to 4 volts to the external input.

On-line manual http://www.pti-nj.com/UserManuals/OpticalChopper-manual.html

s/n 1443-0C4000

Dims 25cm (D) x 23cm (W) x 10cm (H)

Note this sale is of the control unit only, not the motor drive or discs.