Function derive_sample_interval_ns 

pub(crate) fn derive_sample_interval_ns(
    actual_rate: f64,
) -> Result<u64, LJMError>

Converts the actual LabJack scan rate into a sample interval in nanoseconds.

The interval is 1e9 / actual_rate, rounded to the nearest nanosecond.

Arguments

• actual_rate - Scan rate in Hz returned by stream_start.

Errors

Returns an error if the rate is not finite or not positive, or if the rounded interval is zero.

Examples

5000.0 Hz  ->  200_000 ns