Videographic Recorders
SM1000 and SM2000
2 Math Configuration
4
IM/SM2000ADV
Issue 7
Fig. 2.1 Typical Math Block
Note.
Operators are evaluated from left to right therefore the above equation is evaluated as:
[(a1 + 52.4)* Log(a2)] – md2 and NOT as a1 + (52.4* Log(a2)) – md2.
Functions cannot be nested within other functions. To enter an equation requiring nested functions it is necessary to use
another math block, e.g. to evaluate the equation:
proceed as follows:
–
Enter math block 1 as m1 = a1 + a2/m2
–
Enter math block 2 as m2 = 52.4 – a3
Digital signals (md1 to md3) are evaluated as 0 (inactive) and 1 (active), thus in the following example:
m1 = a1 + a2*md1
the sum of (a1+ a2) is set to zero if the digital input md1 is also zero.
m1 = a1 + 52.4 * Log(a2) md2
19 characters total (Max 40)
Operators – see Table 2.1
Math result
(Assigned to recording channels, retransmission outputs)
Source
(Analog) – see Table 2.2
Constant
(Any numerical value, up to 3 d.p.)
Function
– see Table 2.4
Source
(Digital) – see Table 2.3
a1
a2
+
52.4
a3
–
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