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CH-SYS-1C Resonant Chopper Locked To External Clock

Updated:2026-07-15

Brand: EOPC
Model:CH-SYS-1C
Description: The PLD-1C driver phase locks any tuning fork chopper (type CH, except for the subminiature CH-25) to an external clock input.
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Product Details

CH-SYS-1C Resonant Chopper Locked To External Clock Description:

CH-SYS-1C Datasheet

The PLD-1C driver phase locks any tuning fork chopper (type CH, except for the subminiature CH-25) to an external clock input. The system can be used as a "stand alone" unit or can be incorporated into a larger instrument or a system. Although the tuning fork chopper can be used in a large temperature range this driver is not recommended for use in temperature sensitive applications. To lock the chopper to an external clock signal you need to specify the exact clock frequency (to 4 decimal places). The phase relationship to the clock is factory set to customer's requirements (0° to 360°).

Features and Advantages：

Phase locked to an external clock input
10 Hz to 16 kHz frequency range
Both sine wave and square wave reference signals
Clock stability +/-50 PPM
0.01% phase stability
Position output
0.01% or better amplitude stability

Product Options：

PLD-1S-PC	Board level driver that requires an external +/-12V to +/-15V dc power supply.
PLD-1S-110	Cased driver (12" × 10" × 3.8") operating from a line voltage of 110V AC.
PLD-1S-220	Cased driver (12" × 10" × 3.8") operating from a line voltage of 220V AC.
PLD-1S-110/220	Cased driver (12" × 10" × 3.8") with a line switch selector for operating from a line voltage of 110V or 220V AC.

CLOCK REQUIREMENTS：

EXTERNAL CLOCK STABILITY: +/-50 PPM
EXTERNAL CLOCK ACCURACY: 100 PPM

FRONT PANEL CONTROLS：

POWER	Power switch to turn the drive "ON"
CLOCK IN(PUT)	External clock input (TTL or sine wave), BNC connector
LOCKED MODE	Chopper vanes are phase locked to the clock signal
OSCILLATOR MODE	The chopper is self oscillating at its resonant frequency (not locked to the clock input
PHASE CONTROL POT	Phase adjustment of the chopper in relationship to the clock, +/-45° min.
POSITION MONITOR	Vanes position output, BNC connector
AMPLITUDE CONTROL	Chopping amplitude adjustment POT
OUTPUT	Output connector to interconnect to chopper

SPECIFICATIONS：

Frequency range	5 Hz to 16 kHz
External clock signal	TTL level, sine or square wave (1V PTP to 20V PTP)
External clock stability	+/-50 PPM
Chopper amplitude stability	0.01% or better (not locked to the clock input)
Position monitor	Analog position output, +/-5V max. 1kOhm max load
Phase adjustment range	+/-45° min.
Phase stability	0.01%
Phase relationship	Factory set to customer specifications
Operating temperature range	Room temperature only
Power input	110V ac or 220V ac, 50-60 Hz, 20W