Campbell-scientific SDM-INT8 8-Channel Interval Timer Manuel d'utilisateur télécharger pdf (Page 37)

Appendix B. Processing Time Limitations

Example 3

Given

: N = number of channels measured

F = Frequency of input signal, kHz

Function = frequency (Function 2)

Output Option = XXXX with specified sampling interval, S

Find

: Sampling interval, S, such that the number of unprocessed events is ≤

8000

Solution

: The interval required to process 8000 events after the sampling

interval is T

-S, therefore;

-S)*F*N≤8000

S≥T

-(8000/(F*N))

S≥(0.511*S+E

*(.034+.010*N)+0.015*E

)

-(8000/(F*N))

Note: E

= E

= N*F*S

S≤8000/[F*N((0.511+N*F*(0.49 +.01*N))-1)]

Results for the above example are presented in Table 3, Section 5.4.1

B-3

1 2 ... 32 33 34 35 36 37 38 39 40 41 42

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Campbell-scientific SDM-INT8 8-Channel Interval Timer Manuel d'utilisateur Page 37