EOPC - Optical Modulator and Chopper Locked to an External Clock Signal

	ELECTRO-OPTICAL PRODUCTS CORPORATION



	88-65 76th Avenue • Glendale, NY 11385, USA • Tel: 718-997-8100 • Fax: 718-997-8102 • www.eopc.com

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.

FRONT PANEL CONTROLS

POWER

Power switch to turn the drive "ON"

SYNC INPUT

External clock input (TTL or sine wave), BNC connector

LOCKED MODE

The chopper is phase locked to the clock signal

OSC. MODE

The chopper is self oscillating at its resonant frequency (the chopper is not locked to the clock)

PHASE CONTROL POT

To adjust the phase of the chopper in relationship to the clock, ±45° minimum

REF OUT, TTL

TTL level reference output, BNC connector

REF OUT, SINE

Sine wave reference output, BNC connector

OUTPUT

Output connector to interconnect to the chopper

FRONT PANEL CONTROLS
POWER	Power switch to turn the drive "ON"
SYNC INPUT	External clock input (TTL or sine wave), BNC connector
LOCKED MODE	The chopper is phase locked to the clock signal
OSC. MODE	The chopper is self oscillating at its resonant frequency (the chopper is not locked to the clock)
PHASE CONTROL POT	To adjust the phase of the chopper in relationship to the clock, ±45° minimum
REF OUT, TTL	TTL level reference output, BNC connector
REF OUT, SINE	Sine wave reference output, BNC connector
OUTPUT	Output connector to interconnect to the chopper