9-26
specified in the RATE menu. The minimum period will be limited to 5 times the
largest set pulse width. Pressing the
RUN/STOP
button while the burst is in
process will stop the output. After the burst has been completed, pressing the
RUN/STOP
button will generate another burst. To generate a burst of pulses:
•
In the system
MODE
menu: Set to ‘Burst’ mode.
•
In the system
RATE
menu: Set the desired period.
•
In the system
TRIG
menu:
o
Set trigger mode to ‘Enabled’.
o
Set trigger level.
o
Set trigger edge.
•
In the channel menu:
o
Set desired channels to ‘Enabled’.
o
Set the desired burst count for each enabled channel.
•
Verify the rear panel Safety Interlock.
•
Turn Arm Switch to ‘ARM’ Position.
•
Run Pre-Test if enabled and resolve any resulting error conditions.
Pressing the
RUN/STOP
key will now generate a burst of pulses for each
enabled channel.
NOTE: All operation modes require the
Interlock
to be in place and the
Arm
Switch
to be in ARM position.
The front and rear panel external inputs may be used to trigger the system and/or
channel timers to generate a single pulse. The external input has both level and
filter options so that only the desired pulse type (amplitude and width) is able to
trigger the unit. The external trigger rate will be limited to a period of 5 times the
largest channel pulse width setting. The unit will not allow triggers any faster than
this to protect the unit from damage due to over-triggering.
External Input Overview
•
Trigger Level
•
. This sets a threshold level that the input trigger must be
higher than before it will become active. Typically, this level should be set
to a 50% level of the input trigger amplitude. This level can be used to
filter out any pulses that are not of sufficient amplitude. Care must be
taken that the level is not set too low as this could cause triggering off of a
bias or noise floor level.
Filter Width. When enabled, the filter width can be adjusted so that the unit
will not accept any trigger pulse widths that are less than the set filter
