What is an EDR3 and how is it different than the EDR3C?
The original EDR3 used a Hitachi-based microprocessor with a built-in EPROM. When the recorder was factory-calibrated, the calibration numbers were burned into the EPROM. Subsequent calibrations were burned into new microprocessor chips which were then installed in the recalibrated unit. Since the chip is no longer available, we have devised an alternate method for storing calibration numbers in RAM. With the Hitachi chip no longer available, the recorder was redesigned to incorporate a Motorola chip. The EDR3C is the result, and it sports more features than the EDR3 such as Sliding Window Overwrite, and faster download speeds. Calibration numbers are stored in EEPROM, so we no longer need to burn a new chip each time the recorder is calibrated.
