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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. 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 the
“Pulse inhibit” 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 the
“Output inhibit” method,
the gate leaves the base triggering alone and enables/disables the output
directly. Output pulses will immediately cease when the gate signal is
removed
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
0
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.
