PCI-1202/1602/180x Series Card
Multi-Function Boards
User Manual/ Ver. 4.8/ Mar. 2015/ PMH-0014-48/ Page: 94
7.8.2 The Digital Filter of MagicScan
The digital filter is a
average
filter.
Filter value = (V_1+V_2+……+V_n)/n
, where n is average factor
If the input signal is very noisy, this filter can be used to remove these noises.
7.8.3 The Digital Filter of MagicScan
The MagicScan controller scans the analog inputs in
fixed-sampling-rate
. The
different sampling
rate
is implemented with
averaging
technique.
This technique is the same as the digital filter
described in
Sec. 7.8.2
. If the user wishes to use the different sampling rate between channels, the
digital filter will be active at the same time.
This is a situation of ALL or NO.
You can use both the
digital filter and the different sampling rate at the same time or use neither of them.
P180x_ClearScan(…) is designed for PCI-1800/1802 series
P1202_ClearScan(…) is designed for PEX-1202 and PCI-1202 series
P1602_ClearScan(…) is designed for PCI-1602 series
P180X_ClearScan();
P180X_AddToScan(?,?,10,….);
only one channel scan
P180X_StartScan(?,24);
the AD sampling rate = 8 M/24=333 k
the factor=10
sampling rate=333 k/10=33.3 k
P180X_ClearScan();
P180X_AddToScan(A,?,1,….);
P180X_AddToScan(B,?,2,….);
P180X_AddToScan(C,?,3,….);
P180X_StartScan(?,24);
the AD sampling rate = 8 M/24=333 k
scan sampling rate=333 k/3=111 k
channel_A sampling rate=111 k/1=111 k
channel_B sampling rate=111 k/2=55.5 k
channel_C sampling rate=111 k/3=37 k