Description
The SPPPF Series of dual channel programmable, FIR filter platforms, are factory configured, turnkey solutions that cover the audio bandwidth to +20 kHz. Each SPPPF-01 provides two independently tuned channels of on-board analog I/O with 9-bit, (512) tuning while each SPPPF-02 provides two independently tuned channels of on-board analog I/O with 8-bit, (256) tuning. SPPPF's are easy to use, plug-in modules with no external components, all packaged in a compact 2" x 2", low profile footprint. Each SPPPF contains its own anti-alias and reconstruction filters along with ADC's, DAC's and analog I/O. The SPPPF's provide brick wall, linear phase characteristics with low noise attenuation floors of -96 dB typical. Sampling at 48 kHz, the fixed point DSP utilizes 32-bit math to achieve 24-bits of precision for digital FIR filters with shape factors from 1.03 to 1.50.
SPPPF's can be provided in several standard or custom frequency ranges utilizing a broad range of single or multi-rate brick wall algorithms. All pre-programmed for your laboratory or field applications.
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Features/Benefits:
- Integrates the best of analog and digital signal processing to optimize standard and multi-rate FIR filter performance.
- Each channel can be programmed independently.
- Provides plug-in turnkey solutions with over 500 digitally programmable algorithms per channel.
- All standard and custom solutions combine Brick-wall Low-Pass, Band-Pass solutions with linear phase performance.
- Compact 2" x 2" dual channel design provides precision performance while minimizing board space requirements.
Applications
- Sound and Vibration Testing
- Signal Correlation / Data Analysis
- Speech Analysis, Research, Pathology
- Research and Development
- Automatic Test Equipment
- Data Acquisition Systems
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SPPPF-01 Block diagram
SPPPF SOFTWARE SELECTION GUIDE
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Dual Channel Low Pass Ranges
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SPPPF-01
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SWLP-01
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From 10 Hz to 521 Hz in 1.0 Hz steps
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SWLP-02
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From 10 Hz to 5,210 Hz in 10 Hz steps
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SWLP-03
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From 25 Hz to 12,800 Hz in 25 Hz steps
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SWLP-04
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From 50 Hz to 20,950 Hz in 50 Hz steps
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SWLP-CXX
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Consult factory for custom ranges.
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Dual Channel Band Pass Ranges
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SWBP-01
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10 Hz BW from 50 Hz to 5,170 Hz in 10 Hz steps
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SWBP-02
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25 Hz BW from 50 Hz to 12,825 Hz in 25 Hz steps
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SWBP-03
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50 Hz BW from 50 Hz to 20,800 Hz in 50 Hz steps
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SWBP-CXX
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Consult factory for custom ranges.
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SPPPF-02
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| SWLP-05 |
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From 0.1 Hz to 25.6 Hz in 0.1 Hz steps |
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Analog Input/Output
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SPPPF-01 Series
Available Dual Channel
Low-Pass Models
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Low Pass
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Channel Configuration
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Fc1
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Step (Hz)
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Tuning Range
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SWLP-01
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Two Independent LP FIR filters
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10
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1
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10 Hz to 521 Hz
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SWLP-02
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Two Independent LP FIR filters
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10
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10
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10 Hz to 5,210 Hz
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SWLP-03
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Two Independent LP FIR filters
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25
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25
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25 Hz to 12,800 Hz
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SWLP-04
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Two Independent LP FIR filters
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50
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50
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50 Hz to 20,800 Hz
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Fig. 1 - SPP-01 LOW PASS ALGORITHM TEMPLATE
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SWLP-01 Theoretical Performance Table
(Range: 10Hz to 521Hz in 1Hz steps)
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FC11
(Hz)
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FS12
(Hz)
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Shape
Factor
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Attenuation
(dB)
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Time Delay4
(ms)
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10
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15
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1.5
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96
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822
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20
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30
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1.5
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96
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473
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30
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45
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1.5
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96
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298
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40
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60
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1.5
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96
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222
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50
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75
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1.5
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96
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179
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60
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90
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1.5
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96
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149
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70
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105
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1.5
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96
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120
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80
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120
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1.5
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96
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109
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90
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135
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1.5
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96
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98
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100
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150
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1.5
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96
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92
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150
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225
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1.5
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96
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64
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200
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300
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1.5
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97
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47
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250
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375
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1.5
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97
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37
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300
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450
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1.5
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97
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32
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350
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520
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1.5
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97
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28
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400
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590
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1.5
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97
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25
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450
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675
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1.5
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97
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22
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500
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750
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1.5
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98
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20
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Notes:
- FC1 represents the 0dB corner frequency
- FS1 stopband frequency.
- All filters based on 48KHz sampling frequency, -96 dB stopband attenuation and 0.1 dB passband ripple.
- Time delays are for the FIR filter only. Additional time delay for the ADC is approx. 0.2ms and the DAC is 1ms.
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SWLP-02 Theoretical Performance Table
(Range: 10Hz to 5,120Hz in 10 Hz steps)
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FC11
(Hz)
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FS12
(Hz)
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Shape
Factor
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Attenuation
(dB)
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Time Delay4
(ms)
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10
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15
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1.5
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96
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822
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20
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30
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1.5
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96
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473
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30
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45
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1.5
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96
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298
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40
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60
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1.5
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96
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222
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50
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75
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1.5
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96
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179
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60
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90
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1.5
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96
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149
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70
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105
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1.5
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96
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120
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80
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120
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1.5
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96
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109
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90
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135
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1.5
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96
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98
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100
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150
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1.5
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96
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92
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200
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300
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1.5
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97
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47
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300
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450
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1.5
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97
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32
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400
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600
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1.5
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97
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25
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500
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750
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1.5
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98
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20
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600
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900
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1.5
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98
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16
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700
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1,050
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1.5
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98
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13
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800
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1,200
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1.5
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98
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12
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900
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1,350
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1.5
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98
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10
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1,000
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1,500
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1.5
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98
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9.4
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1,500
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2,230
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1.5
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98
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3.3
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2,000
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2,800
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1.4
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98
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3.3
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2,500
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3,300
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1.4
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98
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3.3
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3,000
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3,800
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1.3
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98
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3.3
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3,500
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4,300
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1.3
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98
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3.3
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4,000
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4,800
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1.2
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98
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3.3
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4,500
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5,300
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1.2
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98
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3.3
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5,000
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5,800
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1.2
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98
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3.3
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SWLP-03 Theoretical Performance Table
(Range: 25 Hz to 12,800 Hz in 25 Hz steps)
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FC11
(Hz)
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FS12
(Hz)
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Shape
Factor
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Attenuation
(dB)
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Time Delay4
(ms)
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25
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37.5
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1.5
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96
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355
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50
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75
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1.5
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96
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179
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75
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112
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1.5
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96
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120
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100
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150
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1.5
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96
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92
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200
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300
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1.5
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97
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47
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300
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450
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1.5
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97
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32
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400
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600
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1.5
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97
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25
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500
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750
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1.5
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98
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20
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600
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900
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1.5
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98
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16
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700
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1,050
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1.5
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98
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13
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800
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1,200
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1.5
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98
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12
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900
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1,350
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1.5
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98
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10
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1,000
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1,500
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1.5
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98
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9.4
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2,000
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2,800
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1.4
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98
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3.3
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3,000
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3,800
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1.3
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98
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3.3
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4,000
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4,800
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1.2
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98
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3.3
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5,000
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5,800
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1.2
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98
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3.3
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6,000
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6,800
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1.2
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98
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3.3
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7,000
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7,800
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1.2
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98
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3.3
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8,000
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8,800
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1.1
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98
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3.3
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9,000
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9,800
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1.1
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98
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3.3
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10,000
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10,800
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1.1
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98
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3.3
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11,000
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11,800
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1.1
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98
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3.3
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12,000
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12,800
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1.1
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98
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3.3
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12,800
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13,600
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1.1
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98
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3.3
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Notes:
- FC1 represents the 0dB corner frequency
- FS1 stopband frequency.
- All filters based on 48KHz sampling frequency, -96 dB stopband attenuation and 0.1 dB passband ripple.
- Time delays are for the FIR filter only. Additional time delay for the ADC is approx. 0.2ms and the DAC is 1ms.
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SWLP-04 Theoretical Performance Table
(Range: 50 Hz to 20,950 Hz with 50 Hz steps)
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FC11
(Hz)
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FS12
(Hz)
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Shape
Factor
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Attenuation
(dB)
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Time Delay4
(ms)
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50
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75
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1.5
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96
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179
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100
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150
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1.5
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96
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92
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200
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300
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1.5
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97
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47
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300
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450
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1.5
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97
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32
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400
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600
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1.5
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97
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25
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500
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750
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1.5
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98
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20
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600
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900
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1.5
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98
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16
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700
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1,050
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1.5
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98
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13
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800
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1,200
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1.5
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98
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12
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900
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1,350
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1.5
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98
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10
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1,000
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1,500
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1.5
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98
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9.4
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2,000
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2,800
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1.4
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98
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3.3
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3,000
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3,800
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1.3
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98
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3.3
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4,000
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4,800
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1.2
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98
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3.3
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5,000
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5,800
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1.2
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98
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3.3
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6,000
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6,800
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1.2
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98
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3.3
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7,000
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7,800
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1.2
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98
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3.3
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8,000
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8,800
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1.1
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98
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3.3
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9,000
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9,800
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1.1
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98
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3.3
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10,000
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10,800
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1.1
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98
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3.3
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11,000
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11,800
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1.1
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98
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3.3
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12,000
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12,800
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1.1
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98
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3.3
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13,000
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13,800
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1.1
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98
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3.3
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14,000
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14,800
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1.1
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98
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3.3
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15,000
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15,600
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1.1
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98
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3.3
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16,000
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16,800
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1.1
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98
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3.3
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17,000
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17,800
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1.1
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98
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3.3
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18,000
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18,800
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1.1
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98
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3.3
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19,000
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19,800
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1.1
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98
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3.3
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20,000
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20,800
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1.1
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98
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3.3
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Analog Input/Output
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SPPPF-02 Series
Available Dual Channel
Low-Pass Models
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Low Pass
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Channel Configuration
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Fc1
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Step (Hz)
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Tuning Range
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SWLP-05*
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Two Independent LP FIR filters
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0.1
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0.1
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0.1 Hz to 25.6 Hz
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*This low frequency FIR filter software requires the SPPPF-02 hardware
SWLP-05 Theoretical Performance Table
(Range: 0.1 Hz to 25.6 Hz in 0.1 Hz steps)
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FC11
(Hz)
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FS12
(Hz)
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Shape
Factor
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Attenuation
(dB)
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Time Delay4
(secs)
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0.1
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0.15
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1.5
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90
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91.723
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0.5
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0.75
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1.5
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90
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20.289
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1
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1.5
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1.5
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90
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10.571
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2
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3
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1.5
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90
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5.257
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3
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4.5
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