ADLINK PXI-2502 - Manual (Page 37)

Operation Theorem
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4.2.2.1 Waveform Generation Timing
Six counters interact with the waveform to generate different DAWR timing,
thus forming different waveforms. They are described in Table 4.2.3.
Counter Name Width Description Note
UI_counter 24-bit
Update Interval,
which defines the
update interval be-
tween each data
output.
Update Interval =
UI_counter / Time-
base*.
UC_counter 24-bit
Update Counts,
which defines the
number of data in a
waveform.
When value in
UC_counter is
smaller than the size
of waveform pat-
terns, the waveform
is generated
piece-wisely.
IC_counter 16-bit
Iteration Counts,
which defines how
many times the
waveform is gener-
ated.
DLY1_counter 16-bit
Define the delay time
for waveform gen-
eration after the
trigger signal.
Delay Time =
(DLY1_counter /
Clock Timebase)
DLY2_counter 16-bit
Define the delay time
to separate con-
secutive waveform
generation. Effec-
tive only in Iterative
Waveform Genera-
tion mode.
Delay Time =
(DLY2_counter /
Clock Timebase)
Trig_counter 16-bit
Define the accept-
able start trigger
count when
re-trigger function is
enabled
Timebase*=40M for DAQ/PXI-2500 Series
Table 4.2.3 Summary of Counters for Waveform Generation