Quantum Composers 9250 Series - Manual (Page 9)

9250 Manual Version 1.2 | Quantum Composers 9
4. Pulse Concepts and Pulse Generator Operations
Counter Architecture Overview
*Start source is: Run/Stop button/function in Internal Modes
External input in External Trigger modes
*TRG command via Serial access
**Channels are armed by the Run/Stop function (external button or through 9250 application).
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 enabling the Run/Stop function by either the
external button or through the 9250 application. With external trigger disabled, the Run/Stop
function 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.