Frequency range, Hz    1-10500
Phase shift, °    ±180 
Phase jitter, RMS <0.6 
The OCV-10kFD opto-mechanical modulator (chopper) is widely used in different optical experiments. It comprises a microprocessor control unit and precise Swiss drive. The device features harmonic and subharmonic generator, sync input and output ports, and PC USB connection. 
 
 
Frequency range, Hz 15-4500
Freq. setting accuracy, Hz    0.5 
The OCV-4800F opto-mechanical modulator (chopper) features highly precise multiturn resistor for smooth change of chopping frequency. Sync output is provided. The device also has a built-in frequency counter with display.
 
 
Frequency range, Hz 15-4500
Freq. setting accuracy, Hz    0.5 
The basic model OCV-4800 opto-mechanical modulator (chopper) features highly precise multiturn resistor for smooth change of chopping frequency. Sync output is provided.