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E1437A User's Guide
VXI plug&play Programming Reference
fs provides the module with the frequency of an external sample clock (from >0 to
20600000) connected to the Ext Clk TTL connector. When using an external clock or
when a module is a non-master in a multi-module group, the frequency of the ADC
clock is unknown by the module. It is the responsibility of the programmer to provide
the correct frequency so that library functions dependent on fs will operate properly.
This value has no effect if the module is set up to use the internal ADC clock.
fsPtr contains the current value of the sample clock frequency. If the E1437 is set to
the internal ADC clock, the value of that clock frequency is returned. If the E1437 is set
to the external clock, the last value entered via the hpe1437_clock_fs function is
returned.
Comments
For more details on the interaction among source, master, and sync with multiple
modules and multiple mainframes see Managing multiple modules.
The master, sync, source, and dsp parameters are interdependent with legitimate
combinations being as follows (along with the resultant DSP clock rates):
4-15
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