Pulse Out; Trigger In; Trigger Out - ILX Lightwave LDX-36000 Series User Manual

O P E R A T I O N
3
C H A P T E R
Front Panel Operation

Pulse Out

A TTL level high impedance output is available through a BNC connector on the
rear panel of the instrument to externally monitor the pulse width and frequency or
duty cycle with an oscilloscope. This output is active when the instrument is in
QCW pulse or hard pulse modes. It is a digital representation of the pulse state.
The TTL pulse is stretched by 4 s to compensate for actual analog pulse width
asymmetry of rise and fall time.

Trigger In

The LDX-36000 Series instruments accept a TTL level input signal to initiate an
output current pulse. The TRIGGER IN BNC connector is located to the right of
center on the front panel. The leading edge of this signal is used to initiate an
output pulse; the repetition interval is determined by the rate of the TTL signal at
the TRIGGER IN connector. Pulse width and amplitude are controlled by the
instrument and are programmable from the front panel or through the GPIB
interface. The instrument must be in QCW-TRIG mode in order to control the
output pulse with a trigger input. See QCW-Trig Mode earlier in this chapter.
An adjustable delay is available to synchronize or control the timing of the
instrument's output pulse with other instruments or devices. The output pulse will
be offset or delayed by the delay time in seconds. The offset is from the start or
rising edge of the output pulse. The delay time can be programmed with the GPIB
command LAS:DELAY IN and is adjustable from 20 microseconds delay to one
second with an adjustment resolution in microseconds. See Chapter 5 for a more
detailed description of this command.

Trigger Out

A TTL level signal output synchronized with the current output pulse is available
from the front panel of the LDX-36000 Series instruments. The TRIGGER OUT
BNC connector is located next to the TRIGGER IN connector on the front panel.
This output can be used to synchronize or time measurement or control events in
other instrumentation or devices. This signal is active whenever the output of the
instrument is enabled and when any of the pulse modes of operation are selected.
An adjustable delay is available to control the timing or start of the trigger output
pulse. The trigger output will be offset or delayed by the delay time in seconds.
The delay time is from the start or rising edge of the current output pulse to the
start or rising edge of the trigger output pulse. The delay time can be
programmed with a GPIB command LAS:DELAY OUT and is adjustable from zero
delay to 1 second with an adjustment resolution in microseconds. See Chapter 5
for a more detailed description of this command.
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03_10 LDX-36000 Series
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