Note: Older Quantum Composers pulse generators had a divide-by-n func-
tion. The duty cycle mode is a more general case. 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-n factor.
To Use the Channel Gating Function
Each channel may use the external input to gate or control its output. The gate
controls the triggering of the channel. Once a channel has started to produce a
pulse it will complete the pulse, even if the gate has been removed - no partial
pulses will be produced. To use the gate, set the following parameters
- within the Channel menu
Mode:
In Gate Menu must be set to Channel Menu.
Channel Gate:
Select pulse INH or output INH.
Logic:
Select active high or active low.
In Pulse method, the gate prevents the channel from being triggered by the
channel s trigger source pulse. If a pulse has already started when the gate
disables the channel, the pulse will continue normal output but will not restart on
the next pulse. In Ouput method, the gate leaves the base triggering alone and
enables/disables the output directly.
External Input Overview
The external inputs may be used to trigger the unit or to gate the system or
channel timers. When using a trigger input, the external input acts as a system
start pulse. Depending on the system mode, the result of a trigger input can be
either a single pulse, a burst of pulses or the start of a stream of pulses.
To Generate a Pulse on Every Trigger Input
To generate a pulse on every external trigger received, set the following param-
eters:
- within the Mode menu
Mode:
Select the Single Shot mode.
- within the Trigger menu
Mode:
Select Triggered mode.
Level:
Set the trigger threshold level.
Edge:
Select which edge, rising or falling, to trigger on.
Pressing the RUN/STOP key will arm the unit. Once the unit is armed, it will
generate a T
o
pulse for every external trigger received. Pressing the RUN/
STOP key will disarm the unit. This mode corresponds to the normal external
trigger mode found on most other pulse generators.
