Hard Pulse Mode; Figure 3.14 Qcw Timing Diagram - ILX Lightwave LDX-36000 Series User Manual

3
C H A P T E R
QCW-Trig Mode
Input Trigger
Pulse (High Z)
Output Current
Pulse
Output Trigger
Pulse (50)
Rear Panel
Pulse Output
(50)

Hard Pulse Mode

Some applications require the diode to be operated in a pulse mode with long
pulse widths or "hard" pulses. Hard Pulse mode is selected by pressing the
QCW-Mode Select button (Figure 3.10) until the HPulse LED is illuminated. In
this mode, pulsewidth is adjustable from 1 ms to 2 seconds. Duty cycle and
frequency are also adjustable as described previously.
40
 LDX-36000 Series
O P E R A T I O N
Front Panel Operation
Triggers on Leading Edge
TTL High
(2V-5V)
TTL Low
=0.8V
10 µs
Minimum
TTL Low
=0.8V
TTL Low
=0.8V

Figure 3.14 QCW Timing Diagram

Note: The EXT PULSE OUT output is enabled for all QCW modes.
Note: The EXT PULSE OUT output is designed to drive 50 . Any measurement
equipment connected to this output should be configured for 50  impedance as well.
Otherwise, the output signal may induce extraneous noise in the measurement.
Delay specified by LAS:DELAYIN command
TTL High
(2V-5V)
Delay specified by LAS:DELAYOUT command
TTL High
(2V-5V)
10 µs
Minimum