For applications where a small compact OEM version of our Motor Driven attenuator is required, OZ offers the DD-100. The DD-100 comes in three versions depending on the level of support circuitry the client wishes to engage in; DD-100 (basic); DD-100,-DR; DD-100,-MC. The DD-100 (basic) version provides the user with a direct connection to the stepper motor windings. A logic level output is provided for HOME position information. The HOME signal tells the user when the stepper motor has stepped to a specified, pre-determined location as set by the factory. This position, in-turn, allows the user to calibrate the DD-100 in terms of optical attenuation versus steps from HOME. The DD-100,-DR includes a stepper motor drive circuit using an H-Bridge Chopper configuration. The user drives 4 TTL logic level inputs representing the phase information to the driver circuit which in turn drives the stepper motor windings. Finally, the DD-100,MC offers an embedded microController so as to enable the user to simply transmit position or attenuation commands directly to the attenuator via a serial interface.

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