Directed Electronics PDG-2515/2520 - Manual (Page 21)

PDG-2515/2520 Operating Manual
Page 14
MNPDG2515-2520R0.doc
© 2004 Directed Energy, Inc.
The PULSE CT variable for each channel can be set to any value between
1 and 65,535. In setting the PULSE CT, the x10 button will increase this
number by a factor of ten and the encoder wheel will increase/decrease
the number of pulses incrementally by one. For example, to set the count
to 1,500, first set the count to 15 using the encoder wheel, then press the
X10 button two times. The first press will increment the count to 150, and
the second to 1,500.
Pressing the OUTPUT button enables the output pulse series. The Pulse
On LED will illuminate until the pulse series is completed, at which time
the LED will extinguish. Each time the PULSE ON button is pressed, the
output pulse series will be generated.
In Internal PRF mode, the frequency (repetition rate) of the pulses are
determined by the internal frequency generator. If externally triggered, the
frequency of the pulses is determined by the frequency of the input trigger.
The delay of each of the outputs is relative to the leading edge of the T0
SYNC output.
Figure 5 Example: Pulse Count Mode
Divide By N Mode
In Divide by N Mode, OUT1 generates continuous output pulses (as in
Pulse Generator Mode), and OUT2 generates an output pulse every “Nth”
Output 1 pulse. The divisor is set through the Div Out1 By variable in the
FREQ DIV in the CHANNEL2 menu. The X10 button will multiply this
number by a factor of 10.