Dear NI Support Engineer,
I have NI5401 and NI5112 PCI cards.
I need to use one common external reference clock for both cards.
But the external clock value is different for different sites where I am planning to use the system with two above mentioned cards.
One site is able to provide 10 MHz clock from their hydrogen maser source. In that case I successfully configured NI5112 external
clock source to PFI1 connector and as a clock source for
NI5401 through RTSI CLOCK LINE.
Another site has hydrogen maser which can produce
only 5 MHz clock. In that case I can synchronize NI5401
from external clock coming on PLL_IN connector and enable
routing on-board clock to RTSI clock line. NI5112 will be
configured as slave to r
eceive the clock from RTSI clock line.
NI5401 PCI on-board clock is 20 MHz rather than 10 MHz
which is required for NI5112 external clock frequency.
MY questions:
- is it possible programatically setup the NI5401 routed clock signal to 10 MHz instead of 20 MHz, even if NI5401 will not functioning
properly in all other aspects and will perform single function
of converting external 5 MHz into 10 MHz for NI5112
(I have guess that using 5 MHz as input reference for NI5401
and setting sample clock in niFgen_configureRefClockSource
as 10 MHz could produce 10 MHz on board clock at RTSI clock
line inspite of that all other functions will be screwed.
Is it one none-elegant way to do this ?)
- can I have NI5401 circuit diagram to fix that problem by myself
on hardware level ?
- or might be it is possible to change programatically
expecting reference clock for NI5112 or have
circuit diagrams for the NI5112 to fix that problem
on hardware level ?
I understand tha
t it is not standard way of using NI5401/NI5112 PCI cards
and not expecting full support for my request.
But positive outcome in resolving that problem will give
compatibility between two PCI boards that definetly will
widen a commercial market for them.
