SCDX-RCDX Series Synchro Differential Control Transmitter and Resolver Differential Control


  • High Accuracy & Resolution
  • Low Cost
  • Insensitive to Input Amplitude & Frequency Variations
  • Allows Digital Control of Existing Analog Servo Systems
  • No Adjustments
  • Input Transformer Isolated
  • PC Board Mounting
  • Replaces Electro-Mechanical CDX
  • Resolver Transmitter Available


The SCDX Series are low cost, miniature, solid state control differential transmitters and resolver transmitters designed for military and industrial control applications. They will directly replace electro-mechanical control differential transmitters (CDX) & thus provide digital control to existing analog servo systems.

The input is transformer isolated and accuracy applies over the operating temperature range and with +/-10% input amplitude and frequency variations. The operational amplifier outputs are not transformer isolated, and can be driven into external power amplifiers and Scott "T" transformers for 3 wire synchro outputs. A typical application of this series is in a conventional positioning servo system as a complex error processor. The use of the solid state CDX makes possible the design of servo systems that can be digitally programmed by direct computer input to the digital input of the SCDX.

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