Planar DX/PCI User Manual page 67

Display controller
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MeasurementTime
the sample is taken in
parameter must be greater than 17 and less than 1,179,630.
When measuring a periodic source such as a display, sample
at an integer number of periods. Setting the proper integration
time for a display at a specific frequency is essential to
obtaining accurate, repeatable measurements. Each value
set in
MeasurementTime
Use this equation to find the integration time:
period of
one cycle
integration time for one cycle
------------------- - =
6
00010
00
Multiply the integration time by the number of cycles you
want to measure (31 cycles are recommended). For example,
with a 75 Hz display, use this calculation:
1
6
×
×
----- -
10
31
75
Thus, the integration time is:
413,333 microseconds = .413 seconds
is the number of milliseconds to wait for data
ReadTimeout
when reading from the calibrator port.
You can still use Version 1 (one) of the structure, which does
not include
ReadTimeout
value defaults to 2000 (2 seconds), and you
ReadTimeout
must set
Version
is the number of microseconds over which
DCalibratorMeasure
is equal to one (1) microsecond.
=
413333
. If you do use Version 1 (one), the
to 1 (one).
DCalibratorInit | 57
(page 59). This

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