BNC 575 Series Especificações descarregar pdf (Página 10)

5-10

5 Pulse Concepts and Pulse Generator

Operations

Counter Architecture Overview

*Start source is: RUN/STOP key in Internal Modes

External input in External Trigger modes

*TRG command via Serial/GPIB access

**Channels are armed by the RUN button. In single shot and burst modes

channels may be rearmed by pressing the RUN button.

System Timer Functions

The System Timer functions as a non-retriggerable, multi-vibrator pulse

generator. This means that once started, depending on the mode, the timer will

pro-duce pulses continuously. Before pulses can be generated, the timer must

be armed and then receive a start pulse. Arming the counter is done by pressing

the RUN/STOP key. With external trigger disabled, the RUN/STOP key also

generates the start command for the counter. With external trigger enabled, the

external trigger provides the start pulse. In either case, once started, the counter

operation is determined by the System Mode Generator. Standard modes

include:

Continuous Once started T

pulses are generated continuously.

Single Shot One T

pulse is generated for each start command.

Burst ‘n’ T

pulses are generated for each start command.

Duty Cycle Once started T

pulses cycle on and off continuously.

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BNC 575 Series Especificações Página 10