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19-5
IM 701210-06E
Specifications
19
DSP Channel Computation (Optional)
Item
Specifications
Maximum computation rate 100 kS/s (6 channels simultaneously)
Computed result
16 bits (2400 LSB/div: reference range)
Applicable modules
All modules
Computation types
Addition, subtraction, multiplication, and division between channels
+, –,
×
, and
÷
(without coefficients)
Filters
• Sharp filter
Filter format:
FIR
Filter type:
LPF/HPF/BPF
Filter order:
8 to 194 orders (varies depending on the type and cutoff frequency. For details,
see appendix 6.)
Characteristics: Steep cutoff, linear phase, and little overshoot
LPF:
Cutoff frequency:
2% to 30% of fs (0.2% resolution)
(fs = sampling frequency)
HPF: Cutoff frequency:
2% to 30% of fs (0.2% resolution)
BPF:
Center frequency: 3% to 30% of fs (0.2% resolution),
Bandwidth: 2% of fs
4.6% to 30% of fs (0.2% resolution),
Bandwidth: 5% of fs
7% to 30% of fs (0.2% resolution),
Bandwidth: 10% of fs
9.6% to 30% of fs (0.2% resolution),
Bandwidth: 15% of fs
12% to 30% of fs (0.2% resolution),
Bandwidth: 20% of fs
Cutoff characteristics:
–40 dB at 2fc (LPF), –40 dB at 0.5fc (HPF)
(fc = cutoff frequency)
Phase:
Linear phase characteristics
• Gauss filter
Filter format:
FIR
Filter type:
LPF
Filter order:
5th to 49th order (varies depending on the type and cutoff frequency. For
details, see appendix 6.)
Characteristics: Smooth cutoff characteristics, linear phase, and no overshoot
LPF:
Cutoff frequency:
2% to 30% of fs (0.2% resolution)
(fs = sampling frequency)
Cutoff characteristics:
–3.0
×
(f/fc)
2
dB (f: frequency, fc: cutoff frequency)
Phase:
Linear phase characteristics
• IIR (Butterworth) filter
Filter format:
IIR (Butterworth)
Filter type:
LPF/HPF/BPF
Filter order:
4th order
Characteristics: Characteristics close to an analog filter, flat pass band, and overshoot
LPF:
Cutoff frequency:
0.2% to 30% of fs (0.2% resolution)
(fs = sampling frequency)
HPF: Cutoff frequency:
0.2% to 30% of fs (0.2% resolution)
BPF:
Center frequency
0.6% to 30% of fs (0.2% resolution)
Bandwidth: 1% of fs
1.2% to 30% of fs (0.2% resolution)
Bandwidth: 2% of fs
2.6% to 30% of fs (0.2% resolution)
Bandwidth: 5% of fs
5.2% to 30% of fs (0.2% resolution)
Bandwidth: 10% of fs
7.6% to 30% of fs (0.2% resolution)
Bandwidth: 15% of fs
10.2% to 30% of fs (0.2% resolution)
Bandwidth: 20% of fs
Cutoff characteristics:
–24 dB/Oct
Phase:
Nonlinear phase characteristics
• MEAN (moving average)
Filter format:
FIR (moving average)
Filter type:
LPF
Filter order:
Select from 2, 4, 8, 16, 32, 64, and 128
Characteristics: Comb-shaped cutoff characteristics, high noise suppression effect, and no
overshoot
Differentiation
LPF (bandwidth limit) ON/OFF possible
LPF (sharp): Cutoff frequency: 2% to 30% of fs (0.2% resolution)
Integration/Summation
Reset condition of integration: Acquisition start and ON/OFF of the channel
Selectable reset conditions
Over Limit (
±
10div):
When the computed value e10 divisions or –10divisions of the
Value/Div setting
Zero Cross to Positive:
When the source signal produces a positive edge at the zero-crossing
point
Zero Cross to Negative: When the source signal produces a negative edge at the zero-crossing
point
19.5 Function/15.6 Built-in Printer