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DBS9900 User’s Manual
5-42
DBS9900 Driver Software
82-28993 Revision 01
5.6.6
Get Clock Threshold
an9900_getClockThreshold
Get external clock threshold voltage. Each front-panel clock input connector has a programmable
threshold comparator. The clock source multiplexer comes after this comparator, therefore either
the clock input can be used for either or both modules.
Function Prototype
ViStatus _VI_FUNC
an9900_getClockThreshold
(ViSession
vi
, AN9900_EXTCLK
mod
,
ViReal64
*
thresh
);
an9900_getClockThreshold
Parameters
Variable Type
Description
<INPUT>
vi
ViSession
This control accepts the Instrument Handle returned by the Initialize
function to select the desired instrument driver session.
mod
AN9900_EXTCLK
Specifies for which external clock input to check threshold.
AN9900_EXTCLK_A External
clock
‘A’
input
AN9900_EXTCLK_B External
clock
‘B’
input
<OUTPUT>
*thresh
ViReal64
<RETURN>
= 0
> 0
< 0
ViStatus “VI_SUCCESS”
Warning: The function completed, but an exception condition occurred
which may require attention.
Error: The function did not complete successfully.
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