Directed Electronics PDG-2515/2520 manual Troubleshooting Guide

	PDG-2515/2520 Operating Manual
Troubleshooting Guide
No power LED or screen	Check power source, power switch (located on rear
does not come up.	of unit).
Pulse exhibits excessive	Check load impedance.
ringing.
Frequency limits.	Check duty cycle of EACH channel, both channels
	must be within the specifications of the unit to
	increase the frequency. Note that duty cycle of a
	channel is the addition of the pulse width and the
	delay.
Pulse Width limits.	Check the frequency and duty cycle. Note that duty
	cycle of a channel is the addition of the pulse width
	and the delay settings.
Pulse Delay limits.	Check the frequency and duty cycle. Note that duty
	cycle of a channel is the addition of the pulse width
	and the delay settings.
In external trigger pulse is	Check duty cycle of input trigger signal, check that
not stable or consistent	the signal frequency and trigger signal duty cycle are
with settings.	within specification.
In Burst Mode pulse is	Check to make sure timing constraints are not
not stable or consistent	exceeded; duty cycle of frequency is not exceeded
with settings.	with the addition of extra pulses.
Configuration will not	Make sure a valid configuration had been previously
load.	saved in configuration slot.
Sync output not a square	Check sync lines termination; note that sync does
wave or has excessive	not have same impedance as output lines.
ringing.

Page 35

MNPDG2515-2520R0.doc

© 2004 Directed Energy, Inc.