User manual

D.9 Mode I waveform
Hardware-Triggered Delayed Pulse Strobe
Mode I is identical to Mode G, except the counting will not begin until a
Gate edge is applied to an armed counter. The counter must be armed
before application of the triggering Gate edge; Gate edges applied to a
disarmed counter are disregarded. An armed counter will start counting
on the first source edge after the triggering Gate edge. Countering will
then proceed in the same manner as in Mode G. After the second TC,
the counter will disarm itself. An ARM command and Gate edge must
be issued in this order to restart counting.
Note that after application of a triggering Gate edge, the Gate input will
be disregarded until the second TC. This differs form Mode H, where
the Gate can be modulated throughout the count cycle to stop and start
the counter.
SOURCE
COUNT
VALUE
TC OUTPUT
TC TOGGLED
OUTPUT
GATE
L-1 L-2 2 0
Mode I Waveforms
X L 1 H
WR
ARM
COMMAND
H-1 H-2 2 01 L
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