Quantum Composers 9500 Plus Series - Manual (Page 14)

10
* St art source is: RUN but ton in Internal Modes
Ex ternal i nput i n E xternal trigger modes
** Channels are armed by the RUN but ton. In single s hot and burst modes
channells m ay be r earmed by pressing the R UN a s econd time.
Pulse Concepts and
Pulse Generator Operation
Counter Architecture Overview
*Start source is: RUN button 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 genera-
tor. 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
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
pulses are distributed to all of the start inputs of the Channel Timers
and Mode Generators.