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Pulse Generator NL301
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The NL301 Pulse Generator, replacing the NL300, is a low cost module for producing trains of uniform TTL pulses. It can be operated continuously, switched off, or a single pulse can be triggered manually. A Gate input socket allows synchronous trains of pulses to be gated-on by an externally applied TTL high logic level.
An internal jumper either excludes (as with the NL300) or produces an output pulse coincident with the start of the Gate signal. Pulse frequency is continuously variable over more than three decades using a single 12:1 control and a three-position decade switch.
Three fixed output pulse widths are available. The frequency range and pulse widths were chosen to make this module suitable as a timing source for electrical stimulation of the nervous system, without the necessity of additional modules for determining pulse widths.
The NL301 is also useful for a variety of other timing purposes where a widely variable rate is desirable, and precision is important but not critical. It has an on-board jumper that allows the user to select a frequency range 1/10 of that shown on the front panel. This allows a frequency range of 0.1 to 120 Hz.
keyword : electrophysiology, signal generator, stimulator, warner instruments
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