Bosch DISBLAY DDU 7 Manual page 78

10 | Analog and Frequency Inputs
10.3.5
78 / 160
Digital filter details
DDU 7 uses A/D converter oversampling and digital filtering to recording rate.
Digital filters eliminate 'out‐of‐band' noise
Cut‐off frequency automatically adjusted to recording rate
Example:
▪ 100 Hz recording rate (10 ms)
▪ <40 Hz pass band (>99 %)
▪ >50 Hz stop band (<1 %)
Linear phase – no signal distortion
10000Hz Abtastrate
2
1.5
Wert
1
0.5
0
-0.5
-1
-1.5
-2
0 500 1000 1500 2000 2500 3000
Abtastwerte (roh)
Sensor signal with noise
DDU 7 Manual
100Hz Abtastrate
1.5
1
Wert
0.5
Recorded signal 100Hz
0
(unfiltered)
-0.5
-1
-1.5
0 5 10 15 20 25 30
Abtastwerte (dezimiert)
100Hz Abtastrate
1.5
1
Wert
0.5
Recorded signal 100Hz
0
(filtered)
-0.5
-1
-1.5
0 5 10 15 20 25 30
Abtastwerte (gefiltert)
Bosch Motorsport