ChipSHOUTER Users Manual: Pulse Generation
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grammable trigger be sure to switch the external input to
“active-high” mode.
Note you may see small differences between active-high
and active-low mode. The ChipSHOUTER remains an electronic
device and is sensitive to the very high-power fields being
generated. Active-high and active-low modes show slightly
different susceptibility to various noise sources.
Basic Pulse Generator
The basic pulse generator can generate single or multiple
pulses, with relatively large spacing between them.
Programmable Pulse Generator
The programmable pulse generator can be used to generate
complex patterns, including multiple pulses and delays. It
also provides a much shorter time resolution than the basic
pulse generator.
The pattern is recorded as a binary pattern, where each
digit represents a time-step. For example to generate two
60nS pulses with a 80nS delay (approximately), you would
write the pattern 011100001110 into the pulse generator
memory.
You must end the pattern with an inactive-state. If the
device is in active-high mode, this means you must end the
pattern with a ‘0’. Failure to do this will result in a
trigger error or other problems.
Note you will often find that the second (and later)
pulses require a longer trigger pattern to generate the in-
tended injected pulse. Thus in reality you may find
0111000011110 is needed (an extra ‘1’ on the second pulse).
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