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ADLINK PXI-2502 User Manual

Page 37

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Operation Theorem

• 29

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

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