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Interface Description
Digidata 1322A Operator’s Manual, Copyright 2000-2001, Axon Instruments, Inc.
Analog Input
There are sixteen 16-bit analog input channels. The BNC shields for the Analog
Inputs are connected to the Analog ground. Each channel has a buffer amplifier to
drive the analog multiplexer such that cross-talk between the inputs will be
minimized.
These input channels are used to digitize signals for Clampex or AxoScope.
Analog Output
The front panel has two 16-bit analog output channels. The average output noise is
150 µV peak-to-peak in a 10 kHz bandwidth measured with a single pole filter
(with no voltage command applied). Each channel has an operational amplifier to
buffer the output signal of the D/A converter. The two analog output channels can
be used simultaneously for waveform generation in Clampex.
Digital Output
Digital Outputs 0-3 are found on the front panel of the Digidata 1322A. The 5 V
CMOS level can be used to trigger external devices and the control is provided in
Clampex.
Trigger In
TAG and START are digital inputs compatible with TTL-level signals. The TAG
input can be used to mark events (
e.g.
, perfusion ON) in Clampex and AxoScope.
The START input can be used to begin data acquisition.
