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Modulators and Choppers Locked to an External Clock Signal

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SPECIFICATIONS   Frequency Range   ONE FIXED FREQUENCY from the range of 5 Hz to 20 kHz   External Clock Signal   Sine or TTL level square wave (1V PTP to 20V PTP)   External Clock Stability   ±10 PPM   External Clock Accuracy   25 PPM   Chopper's Amplitude Stability   0.01% or better   Reference Output   Sine and TTL level square wave   Phase Adjustment Range   ±45° minimum range   Phase Stability   0.01%   Phase Relationship   Factory set to customer's spec.   Operating Temperature Range   0 - 60 °C   Power Input   110V ac or 220V ac, 50-60 Hz, 20W

The PLD-1C driver phase locks any resonant chopper (type CH) to an external clock signal, to provide an ultra stable modulating optical beam motion [sub] system. The system can be used as a "stand alone" unit, in the laboratory, or can be incorporated into a larger instrument/system. The chopper is ONE FIXED FREQUENCY, picked from the range of 5 Hz to 20 kHz. The chopper is a small size, light weigh, low cost and long life device. It requires low power drive electronics and does not radiate electromagnetic interference (EMI). It has high frequency stability and high amplitude stability. The chopper is IR, VIS and UV and high vacuum capable. Reference signal and position output available.

The phase relationship to the clock is factory set to customer's requirements (0° to 360°), and is front panel adjustable in a range of ±45° minimum. The driver can be a fully integrated driver with front panels controls and internal power supplies or a printed circuit board level driver. The dimensions of the cased driver are: 12" × 10" × 3.8". The PLD-1C-PC driver is a printed circuit board level driver which requires an external ±15V DC power supply.