Figure 9. control register – CH Tech Pulse Generator User Manual
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Pulse Control Register (0E) This read/write register configures the operating mode of the pulse.
See Figure 9 for details.
0E
Pulse Control Register
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Write
Not Used
DOU RUN TMD DEL FRE
Mode
Read
Not Used
DOU RUN TMD DEL FRE
Mode
DOU
Double Pulse Control (0 = single pulse, 1 = double pulse)
RUN
Run Enable/Disable (1 = enabled)
TMD
Trigger Mode (0 = triggered, 1 = gated)
DEL
Delay Mode (0 = immediate (no delay), 1 = delayed)
FRE
Free Running Mode (0 = triggered, 1 = free running)
Mode
Waveform Mode
bit 1 0
0 0 Normal
0 1 Square Wave
1 0 20 MHz Square Wave
1 1 40 MHz Square Wave
NOTES:
1) With double pulse enabled the primary pulse will start 75 nsec after trigger out. The
second pulse will start the programmed delay time after trigger out. Double pulse
enable has precedence over delayed pulse.
2) Pulse streams are generated when RUN is high, however, the output relay must be
enabled to output to the front panel.
3) With the trigger mode set to gated, the output pulse stream will continue as long as the
TRIG IN is high. When the TRIG IN goes low, the pulse sequence started will finish
then stop.
4) With delayed pulse enabled, the primary pulse will start the programmed delay time
after trigger out. Double pulse enable has precedence over delayed pulse.
5) Free run disables all trigger inputs and produces a continuous pulse stream.
6) In the square wave mode, the square wave period is equal to two times the PRI period
programmed.
7) The special modes provide the ability to output a 20 or 40 MHz square wave by
programming only the waveform mode.
Figure 9. Control Register