9530/8530 Manual Version 4.5
Page 9
4. Pulse Concepts and Pulse Generator
Operations
Counter Architecture Overview
*Start source is:
RUN button in Internal Modes
External input in External Trigger modes
*TRG command via Serial access
**Channels are armed by the RUN button. In single shot and burst modes channels may be rearmed
by pressing the RUN button again.
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 produce 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
0
pulses are generated continuously.
Single Shot
One T
0
pulse is generated for each start command.
Burst
‘N’ T
0
pulses are generated for each start command.
Duty Cycle
Once started T
0
pulses cycle on and off continuously.
The
T
0
pulse is distributed to all of the start inputs of the Channel Timers and Mode Generators.
