Quantum Composers 9250 Series - Manual (Page 29)

9250 Manual Version 1.2 | Quantum Composers
29
Pressing the unit’s Run/Stop button will place the unit into active mode and generate a pulse
train based on the duty cycle settings.
Pressing the unit’s Run/Stop button again
will take the
unit out of the active state (which will not produce pulses). Continue this process for additional
duty cycle pulse trains.
See “Output Examples” for a visual representation.
*Note: If a divide-by- ’N’ function is desired, the duty cycle mode can be used. The duty cycle
mode is a more general case of this operation. To reproduce the divide -by- ’N’ function set
the on cycle to 1 and set the off cycle to ‘N’-1, where ‘N’ is the divide by factor.
External Input Overview
The external Trigger/Gate input may be used to trigger the unit or gate the system/channel
timers. When used in trigger mode, the external input acts as a system start pulse.
Conversely, when used in gate mode, the external input acts in a pulse i nhibiting fashion.
When the 9250 is in external trigger mode, a single pulse, burst of pulses, or duty cycle
response of pulses may be produced on each active channel for each external input trigger .
Generate a Pulse on Every Trigger Input
To generate a single pulse on every trigger input set the following parameters in the 9250
application:

Within the System section:
o Set the mode to Single Shot mode.
o Set the desired Period.
o Select the Triggered mode.
o Set the trigger threshold level to ~50% of the incoming signal.
o Select which edge (i.e. rising or falling) to trigger on.

Within the Channel section:
o Set the mode to Normal.
o Enter the required pulse width and delay. Repeat for each output channel.
o
Enable the corresponding channels by clicking “Enabled” in the 9250 application.
Pressing the unit’s Run/Stop button
will arm the unit. Once the unit is armed, it will generate a
T
0
pulse for every external trigger received. Pressing the unit’s Run/Stop button or clicking the
9250 application
’s Run/Stop again
will disarm the unit. This mode corresponds to the normal
external mode found on most other pulse generators.
See “Output Examples” for a visual
representation.