Error when using data postion delay

Question

I obtained this error when using data position delay. Can anyone please
tell me the reason why I can not configure the delay to be between 0.7
and 0.8.
Possible reason(s):
Driver Status:  (Hex 0xBFFA403F) Unable to configure requested delay property given the current clock rate.
Ensure that the delay value specified is within the valid range for the
frequency specified or do not configure property for delay operation.
Device: PXI1Slot2
Property: Data Position
Sample Rate: 40000000.0
Requested Value: 0.71875
Supported Values: 0.000 through 0.200, 0.300 through 0.700, 0.800 through 1.000,
Status Code: -219401

Answer 1

Timothy,
The 656x devices have a limit on the available data delay values based
on frequency.  Between 25MHz and 50MHz there are "holes" in the
available delay range.  Above 50MHz, the full 0 to 1 data delay is
valid.  If you look in the specifications installed with NI HSDIO
for the NI 656x, on page 7, Figure 1, there is an illustration showing
how to compute what the valid range is for the frequency of interest.
For example, at 40MHz, valid values are:
0 to 0.2
0.3 to 0.7
0.8 to 1
In the error message posted below, you tried to input a value of 0.71875 which is not within these ranges.