Model 301
24-bit USB Data
Acquisition System
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OPERATION
Scanning Mode


The Model 301 will send data back continuously at the preset rate if a start scan command is sent. There are six different types of scan: single-channel, single-channel with digital input, multi-channel, multi-channel with digital input, multi-channel with calibration data, and multi-channel with digital input and calibration data. For single-channel scanning, the Model 301 will take data on whatever channel was selected when the scan was started. Channel change commands can be sent at any time during single-channel scanning. For multi-channel scanning, the Model 301 controls the channel selection. Do not send channel change commands during multi-channel scanning. You can send digital output commands at any time during either type of scan without altering the data acquisition timing.

Calibration scan adds a reading of channel 7, the offset channel, at the end of each scan. The application then subtracts the offset value from the other data to provide active zero-drift suppression.

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