R858 Series
1.0 Hz to 102.4 kHz 2" x 4" Range Switch
8-Bit Programmable 8-Pole Filters
Description
The R858 Series are digitally programmable, 8-pole
low-pass and high-pass active filters that contain a
low and a high programmable frequency range, with
each range tunable over a 256:1 ratio. R858 filters
are available with any two of five standard factory-
set tuning ranges or 8-bit custom ranges from 1.0
Hz to 102.4 kHz. These units contain 8 CMOS logic
inputs that can be operated in a transparent or
latching mode and 1 logic input for range selection.
All R858 Series models are convenient, easy to
use, fully finished filters which require no external
components or adjustments. They feature low
harmonic distortion, and precision phase and ampli-
tude characteristics. R858 filters operate from non-
critical ±12 to ±18 Vdc power supplies, have a 10
kW (min.) input impedance, a 10 W (max.) output im-
pedance.
Features/Benefits:
· Low harmonic distortion and wide signal-to-noise
ratio to 16 bit resolution.
· Digitally programmable corner frequency allows Programmable Specifications: . . . . . . . . . . . . . Page
selecting cut-off frequencies specific to each Digital Tuning & Control. . . . . . . . . . . . . . . . . . . . . . 2
application.
Available Low-Pass Models: . . . . . . . . . . . . . . . . . . .
· Plug-in ready-to-use, reducing engineering R858L8B 8-pole Butterworth . . . . . . . . . . . . . . . 3
design and manufacturing cycle time. R858L8E 8-pole, 6 zero elliptic, 1.77 (-80dB) . . . 3
· Factory-set tuning range, no external clocks or R858L8EX 8-pole, 6 zero elliptic, 1.56 (-80dB) . . . 3
adjustments needed. R858L8EY 8-pole, 6 zero elliptic, 2.00 (-100dB) . . 3
· Broad range of transfer characteristics and corner R858L8L 8-pole Bessel . . . . . . . . . . . . . . . . . . . 4
frequencies to meet a wide range of applications. R858L8D60 8-pole constant delay (-60dB). . . . . . . 4
R858L8D80 8-pole constant delay (-80dB). . . . . . . 4
R858L8D10 8-pole constant delay (-100dB) . . . . . . 4
Applications
Available High-Pass Models: . . . . . . . . . . . . . . . . . .
· Anti-alias filtering R858H8B 8-pole Butterworth . . . . . . . . . . . . . . . . 5
· Data acquisition systems R858H8E 8-pole, 6 zero elliptic, 1.77 (-80dB) . . . 5
· Communication systems and electronics R858H8EX 8-pole, 6 zero elliptic, 1.56 (-80dB) . . . 5
· Medical electronics equipment and research R858H8EY 8-pole, 6 zero elliptic, 2.00 (-100dB) . . 5
· Aerospace, navigation and sonar applications General Specifications:
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . 6
· Sound and vibration testing Pin-out/package data . . . . . . . . . . . . . . . . . . . . . . . . 6
· Real and compressed time data analysis
· Noise elimination
· Signal reconstruction
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
R858 Series
Range Switch Digital Tuning &
8-Bit Programmable Filters Control Characteristics
Digital Tuning Characteristics Pin-Out Key
The digital tuning interface circuits are two 4042 quad CMOS
IN Analog Input Signal D7 Tuning Bit 7 (MSB)
latches which accept the following CMOS-compatible inputs:
eight tuning bits (D0 - D7), arrange selection bit (R), a latch OUT Analog Output Signal D6 Tuning Bit 6
strobe bit (C), and a transition polarity bit (P). GND Power and Signal Return D5 Tuning Bit 5
"P" Transition Polarity Bit D4 Tuning Bit 4
Filter tuning follows the tuning equation given below:
"C" Tuning Strobe Bit D3 Tuning Bit 3
7 6 5 4
fc = ( fmax/256 ) [ 1 + D7 x 2 + D6 x 2 + D5 x 2 + D4 x 2 + D3 x +Vs Supply Voltage, Positive D2 Tuning Bit 2
3 2 1
2 + D2 x 2 + D1 x 2 + D0 x 2 ]
0
-Vs Supply Voltage, Negative D1 Tuning Bit 1
Os Offset Adjustment D0 Tuning Bit 0 (LSB)
where D1 - D7 = "0" or "1", and
R Range Switch Adjustment
fmax = Maximum tuning frequency;
fc = corner frequency; OUT +Vs -Vs R
Minimum tunable frequency = fmax/256 (D0 thru D7 = 0); D7
Minimum frequency step (Resolution) = fmax/256 D6
Data Input Specifications D5
D4
Data Control Lines GND
Functions Latch Strobe (C) 2.00
D3
Transition Polarity (P)
D2
Data Control Modes
D1
Mode 1 P = 0; C = 0 frequency follows input codes
P = 0; C = 0> frequency latched on rising edge D0
Mode 2 P = 1; C = 1 frequency follows input codes IN Os4 Bottom View P C
P = 1; C = 1fl frequency latched on falling edge
Input Data Levels (CMOS Logic)
Input Voltage (Vs = 15 Vdc)
Low Level In 0 Vdc min. 4 Vdc max.
High Level In 11 Vdc min. 15 Vdc max. MSB --- --- --- --- --- --- LSB Bit
Input Current -5
Weight
High Level In - 10 mA typ. -1 mA max.. 7 6 5 4 3 2 1 0
-5 2 2 2 2 2 2 2 2 fc
Low Level In +10 mA typ. +1 mA max. Corner
Frequency
Input Capacitance 5 pF typ 7.5 pF max. D7 D6 D5 D4 D3 D2 D1 D0
Latch Response 0 0 0 0 0 0 0 0 fmax/256
Data Set Up Time1 25 nS
Data Hold Time2 50 nS 0 0 0 0 0 0 0 1 fmax/128
Strobe Pulse Width 80 nS min.
Input Data Format Frequency Select Bits 0 0 0 0 0 0 1 1 fmax/64
Positive Logic Logic "1" = +Vs 0 0 0 0 0 1 1 1 fmax/32
Logic "0" = Gnd
0 0 0 0 1 1 1 1 fmax/16
Bit Weighting (Binary-Coded)
D0 LSB (least significant bit) 0 0 0 1 1 1 1 1 fmax/8
D7 MSB (most significant bit)
Frequency Range 256 : 1, Binary Weighted 0 0 1 1 1 1 1 1 fmax/4
0 1 1 1 1 1 1 1 fmax/2
Notes: 1 1 1 1 1 1 1 1 fmax
1. Frequency data must be present before occurrence of strobe edge.
2. Frequency data must be present after occurrence of strobe edge.
2
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R858 Series
Range Switch 8-Pole
8-Bit Programmable Low-Pass Filters
Model R858L8B R858L8E R858L8EX R858L8EY
Product Specifications
Transfer Function 8-Pole 8-Pole, 6 zero 8-Pole, 6 zero 8-Pole, 6 zero
Butterworth Elliptic Elliptic Elliptic
Size 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6"
Range fc, fr 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz
Theoretical Transfer Appendix A Appendix A Appendix A Appendix A
Characteristics Page 9 Page 24 Page 23 Page 25
Passband Ripple 0.0 dB ± 0.035 dB - 0.05 dB - 0.05 dB
(theoretical)
DC Voltage Gain 0 ± 0.1 dB max. 0 ± 0.1 dB max. 0 ± 0.1 dB max. 0 ± 0.1 dB max.
(non-inverting) 0 ± 0.05 dB typ. 0 ± 0.05 dB typ. 0 ± 0.05 dB typ. 0 ± 0.05 dB typ.
Stopband
Attenuation Rate 48 dB/octave 80 dB min. 80 dB min. 100 dB min.
Cutoff Frequency fc ± 2% max. fr ± 2% max. fr ± 2% max. fr ± 2% max.
Stability ± 0.01% /°c ± 0.01% /°c ± 0.01% /°c ± 0.01% /°c
Amplitude - 3 dB - 0.035 dB - 0.05 dB - 0.05 dB
Phase -360° -323.5° -414° -419°
Filter Attenuation 0.12 dB 0.80 fc 0.035 dB 1.00 fr 0.5 dB 1.00 fr 0.5 dB 1.00 fr
(theoretical) 3.01 dB 1.00 fc 3.01 dB 1.13 fr 3.01 dB 1.05 fr 3.01 dB 1.06 fr
60.0 dB 2.37 fc 60.0 dB 1.67 fr 60.0 dB 1.45 fr 80.0 dB 1.83 fr
80.0 dB 3.16 fc 80.0 dB 1.77 fr 80.0 dB 1.56 fr 100.0 dB 2.00 fr
Phase Match1 0 - 0.8 fc ± 2° max. 0 - 0.8 fr ± 2° max. 0 - 0.8 fr ± 3° max. 0 - 0.8 fr ± 3° max.
± 1° typ. ± 1° typ. ± 1.5° typ. ± 1.5° typ.
0.8 fc - 1.0 fc ± 3° max. 0.8 fr - 1.0 fr ± 4° max. 0.8 fr - 1.0 fr ± 4° max. 0.8 fr - 1.0 fr ± 4° max.
± 1.5° typ. ± 2° typ. ± 2° typ. ± 2° typ.
Amplitude Accuracy 0 - 0.8 fc ± 0.2 dB max. 0 - 0.8 fr ± 0.2 dB max. 0 - 0.8 fr ± 0.2 dB max. 0 - 0.8 fr ± 0.2 dB max.
(theoretical) ± 0.1 dB typ. ± 0.1 dB typ. ± 0.1 dB typ. ± 0.1 dB typ.
0.8 fc - 1.0 fc ± 0.3 dB max. 0.8 fr - 1.0 fr ± 0.3 dB max. 0.8 fr - 1.0 fr ± 0.5 dB max. 0.8 fr - 1.0 fr ± 0.5 dB max.
± 0.15 dB typ. ± 0.15 dB typ. ± 0.25 dB typ. ± 0.25 dB typ.
Total Harmonic < - 100 dB typ. < - 88 dB typ. < - 88 dB typ. < - 88 dB typ.
Distortion @ 1 kHz
Wide Band Noise 200 mVrms typ. 200 mVrms typ. 250 mVrms typ. 250 mVrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise 50 mVrms typ. 50 mVrms typ. 75 mVrms typ. 75 mVrms typ.
(5 Hz - 100 kHz)
Filter Mounting
Assembly FMA-03A FMA-03A FMA-03A FMA-03A
1.Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.
3
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
R858 Series
Range Switch 8-Pole
8-Bit Programmable Low-Pass Filters
Model R858L8L R858L8D60 R858L8D80 R858L8D10
Product Specifications
Transfer Function 8-Pole 8-Pole, 6 zero 8-Pole, 6 zero 8-Pole, 6 zero
Bessel Constant Delay Constant Delay Constant Delay
Size 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6"
Range fc 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz
Theoretical Transfer Appendix A Appendix A Appendix A Appendix A
Characteristics Page 4 Page 20 Page 21 Page 22
Passband Ripple 0.0 dB 0.15 dB 0.15 dB 0.15 dB
(theoretical)
DC Voltage Gain 0 ± 0.1 dB max. 0 ± 0.1 dB max. 0 ± 0.1 dB max. 0 ± 0.1 dB max.
(non-inverting) 0 ± 0.05 dB typ. 0 ± 0.05 dB typ. 0 ± 0.05 dB typ. 0 ± 0.05 dB typ.
Stopband
Attenuation Rate 48 dB/octave 60 dB min. 80 dB min. 100 dB min.
Cutoff Frequency fc ± 2% max. fc ± 2% max. fc ± 2% max. fc ± 2% max.
Stability ± 0.01% /°c ± 0.01% /°c ± 0.01% /°c ± 0.01% /°c
Amplitude - 3 dB - 3 dB - 3 dB - 3 dB
Phase -182° -306° -306° -311°
Filter Attenuation 1.91 dB 0.80 fc 3.01 dB 1.00 fc 3.01 dB 1.00 fc 3.01 dB 1.00 fc
(theoretical) 3.01 dB 1.00 fc 40.0 dB 2.28 fc 60.0 dB 3.08 fc 80.0 dB 4.45 fc
60.0 dB 4.52 fc 60.0 dB 2.64 fc 80.0 dB 3.57 fc 100.0 dB 5.20 fc
80.0 dB 6.07 fc
Phase Match1 0 - fc ± 2° max. 0 - fc ± 2° max. 0 - fc ± 2° max. 0 - fc ± 2° max.
± 1° typ. ± 1° typ. ± 1° typ. ± 1° typ.
Amplitude Accuracy 0 - fc ± 0.2 dB max. 0 - 0.8 fc ± 0.2 dB max. 0 - 0.8 fc ± 0.2 dB max. 0 - 0.8 fc ± 0.2 dB max.
(theoretical) ± 0.1 dB typ. ± 0.1 dB typ. ± 0.1 dB typ. ± 0.1 dB typ.
0.8 fc - 1.0 fc ± 0.3 dB max. 0.8 fc - 1.0 fc ± 0.3 dB max. 0.8 fc - 1.0 fc ± 0.3 dB max.
± 0.15 dB typ. ± 0.15 dB typ. ± 0.15 dB typ.
Total Harmonic < - 100 dB typ. < - 100 dB typ. < - 100 dB typ. < - 100 dB typ.
Distortion @ 1 kHz
Wide Band Noise 200 mVrms typ. 200 mVrms typ. 200 mVrms typ. 200 mVrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise 50 mVrms typ. 50 mVrms typ. 50 mVrms typ. 50 mVrms typ.
(5 Hz - 100 kHz)
Filter Mounting
Assembly FMA-03A FMA-03A FMA-03A FMA-03A
1.Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.
4
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
R858 Series
Range Switch 8-Pole
8-Bit Programmable High-Pass Filters
Model R858H8B R858H8E R858H8EX R858H8EY
Product Specifications
Transfer Function 8-Pole 8-Pole, 6 zero 8-Pole, 6 zero 8-Pole, 6 zero
Butterworth Elliptic Elliptic Elliptic
Size 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6"
Range fc, fr 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz
Theoretical Transfer Appendix A Appendix A Appendix A Appendix A
Characteristics Page 29 Page 37 Page 36 Page 38
Passband Ripple 0.0 dB ± 0.035 dB -0.05 dB -0.05 dB
(theoretical)
Voltage Gain 0 ± 0.2 dB to 100 kHz 0 ± 0.2 dB to 100 kHz 0 ± 0.2 dB to 100 kHz 0 ± 0.2 dB to 100 kHz
(non-inverting) 0 ± 0.5 dB to 120 kHz 0 ± 0.5 dB to 120 kHz 0 ± 0.5 dB to 120 kHz 0 ± 0.5 dB to 120 kHz
Power Bandwidth 120 kHz 120 kHz 120 kHz 120 kHz
Small Signal (-6 dB) 1 MHz (-6 dB) 1 MHz (-6 dB) 1 MHz (-6 dB) 1 MHz
Bandwidth
Stopband
Attenuation Rate 48 dB/octave 80 dB 80 dB 100 dB
Cutoff Frequency fc ± 2% max. fr ± 2% max. fr ± 2% max. fr ± 2% max.
Stability ± 0.01% /°c ± 0.01% /°c ± 0.01% /°c ± 0.01% /°c
Amplitude - 3 dB - 0.035 dB - 0.05 dB - 0.05 dB
Phase -360° -323.5° -414° -419°
Filter Attenuation 80 dB 0.31 fc 80 dB 0.56 fr 80 dB 0.64 fr 100 dB 0.50 fr
(theoretical) 60.0 dB 0.42 fc 60.0 dB 0.60 fr 60.0 dB 0.69 fr 80.0 dB 0.55 fr
3.01 dB 1.00 fc 3.01 dB 0.88 fr 3.01 dB 0.95 fr 3.01 dB 0.94 fr
0.00 dB 2.00 fc 0.03 dB 1.00 fr 0.03 dB 1.00 fr 0.03 dB 1.00 fr
0.00 dB 2.00 fr 0.00 dB 2.00 fr 0.00 dB 2.00 fr
Phase Match1 fc - 100 kHz ± 3° max. fr - 1.25 fr ± 4° max. fr - 1.25 fr ± 4° max. fr - 1.25 fr ± 4° max.
± 1.5° typ. ± 2° typ. ± 2° typ. ± 2° typ.
1.25 fr-100 kHz ± 2° max. 1.25 fr-100 kHz± 2° max. 1.25 fr-100 kHz ± 3° max.
± 1° typ. ± 1° typ. ± 1.5° typ.
Amplitude Accuracy fc-1.25 fc ± 0.30 dB max. fr-1.25 fr ± 0.3 dB max. fr-1.25 fr ± 0.5 dB max. fr-1.25 fr ± 0.5 dB max.
(theoretical) ± 0.15 dB typ. ± 0.15 dB typ. ± 0.25 dB typ. ± 0.25 dB typ.
1.25 fc-100kHz± 0.20 dB max. 1.25 fr-100 kHz ± 0.2 dB max. 1.25 fr-100 kHz ± 0.2 dB max. 1.25 fr-100 kHz ± 0.2 dB max.
± 0.10 dB typ. ± 0.1 dB typ. ± 0.1 dB typ. ± 0.1 dB typ.
Total Harmonic < - 100 dB typ. < - 88 dB typ. < - 88 dB typ. < - 88 dB typ.
Distortion @ 1 kHz
Wide Band Noise 400 mVrms typ. 400 mVrms typ. 500 mVrms typ. 500 mVrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise 100 mVrms typ. 100 mVrms typ. 150 mVrms typ. 150 mVrms typ.
(5 Hz - 100 kHz)
Filter Mounting
Assembly FMA-03A FMA-03A FMA-03A FMA-03A
1.Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.
5
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
R858 Series
Specification Pin-Out and Package Data
(25°C and Vs ± 15 Vdc) Ordering Information
Analog Input Characteristics1 Pin-Out & Package Data
Impedance 10 k W min.
4.00
Voltage Range ± 10 Vpeak
Max. Safe Voltage ±Vs
0.6
Analog Output Characteristics
Impedance (Closed Loop) 11 W typ. 0.2 min.
10 W max. Side View
0.04 Dia.
Linear Operating Range ±10V All dimensions are in inches
2 All Case Dimensions ± 0.01"
Maximum Current ±2 mA
3 Grid Dimensions 0.1" x 0.1"
Offset Voltage 22 mV typ.
20 mV max. OUT +Vs -Vs R
Offset Temp. Coeff. 50 mV/°C
D7
Power Supply (±Vs) D6
Rated Voltage ±15 Vdc D5
Operating Range ±12 to ±18 Vdc D4
Maximum Safe Voltage ±18 Vdc 2.00 GND
Quiescent Current D3
D2
8 Pole ±25 mA typ.
D1
±40 mA max.
D0
Temperature
Operating -20 to +70°C IN Os4 Bottom View P C
Storage -25 to +85°C
Filter Mounting Assembly-See FMA-03A
Notes:
1. Input and output signal voltage referenced to supply common.
2. Output is short circuit protected to common. Ordering Information
DO NOT CONNECT TO ±Vs. Filter Type Transfer Function
3. Adjustable to zero.
L - Low Pass B - Butterworth
4. Units operate with or without offset pin connected. H - High Pass L - Bessel
D60 - constant delay (-60 dB)
D80 - constant delay (-80 dB)
DC Offset Adjustment D10 - constant delay (-100 dB)
+ Vs E - elliptic 1.77 (-80 dB)
EX - elliptic 1.56 (-80 dB)
Do not connect
if trim is not
R858L8B-3/5 EY - elliptic 2.00 (-100 dB)
required.
20 k W OS
Model Number
(Cermet)
e.g., Model Tuning Minimum
Number Range (Hz) Step(Hz)
2 1.0 to 256 1.0
3 10 to 2560 10
- Vs 4 100 to 25.6k 100
5 200 to 51.2k 200
6 400 to 102.4k 400
We hope the information given here will be helpful. The information is based on data and our best knowledge, and we consider the information to be true and accurate. Please read all statements,
recommendations or suggestions herein in conjunction with our conditions of sale which apply to all goods supplied by us. We assume no responsibility for the use of these statements,
recommendations or suggestions, nor do we intend them as a recommendation for any use which would infringe any patent or copyright. IN-00R858-00
6
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
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Product Handling
Procedure
Programmable Filter Modules Power Sequence & ESD
November 2000
Programmable Filters Modules
818, 824, 828, 828BP, 828BR, 854, 858, R854, R858
I. Scope
The following precautions are necessary when handling and installing Frequency Devices
programmable filter modules.
II. Digital Circuit Description
The digital input pins connect directly to 4000 series CMOS logic, such as the 4053 analog switch. The
power supply (Vss) for the digital logic on the module comes directly from the +15 Volt pin on the
module. This sets the threshold voltage at 11.0 V minimum to 15.0 V maximum for a "1" (High) level
and 0.0 V minimum to 4.0 V maximum for a "0" (Low) level. Applying a voltage between 4.0 and 11.0
V will produce unpredictable operation. Connecting 5 Volt or 3.3 V logic devices directly to the filter
module without using a voltage translator will result in erratic operation of the filter.
III. (VERY IMPORTANT) Power-Up and Power-Down Sequence
Do not plug-in or un-plug module while power is applied. It is imperative that power is
supplied to the + 15 V pin on the filter module before or at the same instance that any digital pin is
pulled High (> 0.0 V). Failure to do this will result in excessive current flowing through the digital input
pin and through a protection diode internal to the 4000 logic, which will result in damage to the module.
The proper power-up and power-down sequence is:
1. Connect filter module ground.
2. Connect filter module +15 V.
3. Connect filter module -15 V.
4. Connect the input signal.
All four of the above steps can also occur simultaneously. Power-down should occur in the reverse
order.
IV. ESD Issues
Like most modern electronic equipment, the modules can be damaged by electrostatic discharge (ESD).
The modules are shipped from the factory in sealed, anti-static packaging and should be kept in the
sealed package prior to mounting on a circuit board. The following additional rules should also be
observed when handling the modules after they are removed from the factory packaging:
1. Only a person wearing a properly grounded wrist strap should handle the modules.
2. Any work surface that the modules are placed on must be properly ESD grounded.
3. Any insulating materials capable of generating static charge (such as paper) should be kept
away from the modules.
Static generating clothing should be covered with an ESD-protective smock.
1
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
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8-Pole
Bessel
Appendix A Low-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 .506
Amp (dB)
0.10 -0.029 -18.2 .506 -40
0.20 -0.117 -36.4 .506
0.30 -0.264 -54.7 .506 -60
0.40 -0.470 -72.9 .506
0.50 -0.737 -91.1 .506
-80
0.60 -1.06 -109 .506
0.70 -1.45 -128 .506 -100
0.80 -1.91 -146 .506 2 3 4 5 6 78
0.85 -2.16 -155 .506 0.1 1.0 2 3 4 5 6 7 10.0
0.90 -2.42 -164 .506 Normalized Frequency(f/fc)
0.95 -2.71 -173 .506
1.00 -3.01 -182 .506
1.10 -3.67 -200 .506 Delay (Normalized)
1.20 -4.40 -219 .506
1.30 -5.20 -237 .506 1.0
1.40 -6.10 -255 .505
Delay (sec)
1.50 -7.08 -273 .504
1.60 -8.16 -291 .502
1.70 -9.36 -309 .498
1.80 -10.7 -327 .492 0.5
1.90 -12.1 -345 .482
2.00 -13.7 -362 .468
2.25 -18.1 -402 .417
2.50 -23.1 -436 .352
2.75 -28.3 -465 .291 0.0
0.15 2 3 4 5 6 7 89 1.5
0.1 1.0
3.00 -33.4 -489 .241 Normalized Time (1/f sec)
3.25 -38.3 -509 .201
3.50 -43.1 -526 .170
4.00 -51.8 -552 .126
5.00 -66.8 -587 .077 Step Response
Step Response (V/V)
6.00 -79.2 -610 .052 1.2
7.00 -89.8 -626 .038 1.0
8.00 -99.0 -638 .029
9.00 -107 -647 .023 0.8
10.0 -114 -655 .018
0.6
0.4
0.2
1.Normalized Group Delay:
-0.0
The above delay data is normalized to a corner frequency -0.2
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc).
Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
4
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
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Low-Pass
8-Pole
Appendix A Butterworth
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 .816
Amp (dB)
0.10 0.00 -29.4 .819 -40
0.20 0.00 -59.0 .828
0.30 0.00 -89.1 .843 -60
0.40 0.00 -120 .867
0.50 0.00 -152 .903
-80
0.60 -0.001 -185 .956
0.70 -0.014 -221 1.04 -100
0.80 -0.121 -261 1.19 2 3 4 5 6 78 1.0 2 3 4 5 67
0.85 -0.311 -283 1.29 0.1 10.0
0.90 -0.738 -307 1.40 Normalized Frequency(f/fc)
0.95 -1.58 -333 1.48
1.00 -3.01 -360 1.46
1.10 -7.48 -408 1.17 Delay (Normalized)
1.20 -12.9 -445 .873 2.0
1.30 -18.2 -472 .672
1.40 -23.4 -494 .540
Delay (sec)
1.50 -28.2 -511 .448
1.60 -32.7 -526 .380
1.70 -36.9 -539 .328 1.0
1.80 -40.8 -550 .287
1.90 -44.6 -560 .253
2.00 -48.2 -568 .226
2.25 -56.3 -586 .174
2.50 -63.7 -600 .139 0.0
2.75 -70.3 -611 .113 0.1 0.15 2 3 4 5 6 7 8 9 1.0 1.5
3.00 -76.3 -621 .094 Normalized Time (1/f sec)
3.25 -81.9 -629 .080
3.50 -87.1 -635 .069
4.00 -96.3 -646 .052
5.00 -112 -661 .033 Step Response
Step Response (V/V)
6.00 -125 -671 .023 1.2
7.00 -135 -678 .017
8.00 -144 -683 .013 1.0
9.00 -153 -687 .010 0.8
10.0 -160 -691 .008
0.6
0.4
0.2
1.Normalized Group Delay: -0.0
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc). Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
9
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Constant Delay
Appendix A Low-Pass (60 dB)
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 .776
Amp (dB)
0.10 0.005 -28.0 .776 -40
0.20 0.012 -55.9 .776
0.30 0.005 -83.9 .776 -60
0.40 -0.042 -112 .776
0.50 -0.161 -140 .776 -80
0.60 -0.384 -168 .776
0.70 -0.745 -196 .776 -100
0.80 -1.28 -224 .776 2 3 4 5 6 78
0.85 -1.62 -238 .776 0.1 1.0 2 3 4 5 6 7 10.0
Normalized Frequency(f/fc)
0.90 -2.02 -252 .776
0.95 -2.48 -265 .775
1.00 -3.01 -279 .773
1.10 -4.29 -307 .766 Delay (Normalized)
1.20 -5.91 -334 .749
1.0
1.40 -10.3 -386 .675
1.60 -15.9 -431 .558
Delay (sec)
1.80 -22.4 -467 .443
2.00 -29.4 -495 .351
2.25 -39.0 -523 .268
0.5
2.50 -50.5 -544 .212
2.75 -78.0 -561 .171
3.00 -63.7 -395 .142
3.25 -63.5 -407 .119
3.50 -66.9 -417 .102
0.0
3.75 -74.7 -425 .088 0.1 0.15 2 3 4 5 6 7 89
1.0 1.5
4.00 -85.0 -253 .077 Normalized Time (1/f sec)
4.25 -72.0 -259 .068
4.50 -67.9 -265 .060
4.75 -65.8 -270 .054
Step Response
5.00 -64.6 -275 .048
Step Response (V/V)
5.25 -63.9 -279 .044 1.2
5.50 -63.5 -283 .040 1.0
5.75 -63.3 -286 .036
6.00 -63.2 -289 .033 0.8
6.50 -63.3 -295 .028 0.6
7.00 -63.7 -299 .024
8.00 -64.7 -307 .019 0.4
9.00 -66.0 -313 .015 0.2
10.0 -67.3 -318 .012
1.Normalized Group Delay:
-0.0
The above delay data is normalized to a corner frequency -0.2
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc).
Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
20
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Constant Delay
Appendix A Low-Pass (80 dB)
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 .852
Amp (dB)
0.10 0.017 -30.7 .852 -40
0.20 0.058 -61.3 .852
0.30 0.099 -92.0 .852 -60
0.40 0.105 -123 .852
0.50 0.034 -153 .852 -80
0.60 -0.157 -184 .852
0.70 -0.510 -215 .852 -100
0.80 -1.07 -245 .851 2 3 4 5 6 78
0.85 -1.44 -261 .850 0.1 1.0 2 3 4 5 6 7 10.0
Normalized Frequency(f/fc)
0.90 -1.89 -276 .849
0.95 -2.41 -291 .846
1.00 -3.01 -306 .841
1.10 -4.50 -336 .821 Delay (Normalized)
1.20 -6.39 -365 .783
1.0
1.40 -11.3 -417 .656
1.60 -17.1 -459 .512
Delay (sec)
1.80 -23.2 -492 .396
2.00 -29.1 -517 .312
2.25 -36.3 -542 .239
0.5
2.50 -43.4 -561 .189
2.75 -50.3 -576 .153
3.00 -57.6 -589 .127
3.25 -62.5 -599 .107
3.50 -75.4 -608 .092
0.0
3.75 -98.3 -616 .079 0.1 0.15 2 3 4 5 6 7 89
1.0 1.5
4.00 -86.3 -442 .069 Normalized Time (1/f sec)
4.25 -84.1 -448 .061
4.50 -85.1 -454 .054
4.75 -87.9 -458 .049
Step Response
5.00 -92.8 -462 .044
Step Response (V/V)
5.25 -104 -466 .040 1.2
5.50 -101 -289 .036 1.0
5.75 -93.3 -293 .033
6.00 -89.9 -295 .030 0.8
6.50 -86.6 -300 .026 0.6
7.00 -85.1 -305 .022
8.00 -84.1 -312 .017 0.4
9.00 -84.3 -317 .013 0.2
10.0 -84.9 -321 .011
1.Normalized Group Delay:
-0.0
The above delay data is normalized to a corner frequency -0.2
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc).
Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
21
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Constant Delay
Appendix A Low-Pass (100 dB)
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec) -20
0.00 0.00 0.00 .865
Amp (dB)
0.10 0.015 -31.1 .865 -40
0.20 0.051 -62.3 .865 -60
0.30 0.085 -93.4 .865
0.40 0.085 -125 .865 -80
0.50 0.010 -156 .865 -100
0.60 -0.182 -187 .865
0.70 -0.532 -218 .865 -120
0.80 -1.09 -249 .864 2 3 4 5 678 2 3 4 5 67
0.85 -1.45 -265 .863 0.1 1.0 10.0
Normalized Frequency(f/fc)
0.90 -1.89 -280 .861
0.95 -2.41 -296 .857
1.00 -3.01 -311 .851
1.10 -4.50 -341 .828 Delay (Normalized)
1.20 -6.38 -370 .785
1.0
1.40 -11.2 -422 .650
1.60 -16.8 -464 .504
Delay (sec)
1.80 -22.5 -496 .389
2.00 -28.0 -520 .306
2.25 -34.5 -544 .235
0.5
2.50 -40.5 -563 .186
2.75 -46.1 -578 .151
3.00 -51.4 -591 .125
3.50 -61.5 -610 .090
4.00 -71.2 -624 .068
0.0 0.15 2 3 4 5 6 7 89
4.50 -81.3 -635 .054 0.1 1.0 1.5
5.00 -93.4 -643 .043 Normalized Time (1/f sec)
5.50 -142 -651 .036
6.00 -105 -476 .030
6.20 -105 -478 .028
Step Response
6.50 -106 -481 .025
Step Response (V/V)
7.00 -110 -486 .022 1.2
8.00 -122 -312 .017 1.0
9.00 -109 -318 .013
10.0 -106 -322 .011 0.8
12.0 -105 -328 .007 0.6
14.0 -106 -333 .005
16.0 -107 -336 .004 0.4
18.0 -108 -339 .003 0.2
20.0 -109 -341 .003
1.Normalized Group Delay:
-0.0
The above delay data is normalized to a corner frequency -0.2
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc).
Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
22
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Elliptic, 1.56
Appendix A Low-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 0.823
Amp (dB)
0.10 -0.001 -29.7 0.829 -40
0.20 -0.013 -59.8 0.844
0.30 -0.040 -90.5 0.865
0.40 -0.049 -122 0.904 -60
0.50 -0.018 -156 0.972 -80
0.55 -0.003 -174 1.016
0.60 -0.002 -192 1.064 -100
0.65 -0.019 -212 1.116 2 3 4 5 6 78 2 3 4 5 67
0.70 -0.042 -233 1.178 0.1 1.0 10.0
0.75 -0.049 -255 1.264 Normalized Frequency(f/fc)
0.80 -0.026 -279 1.388
0.85 -0.001 -305 1.557
0.90 -0.024 -335 1.767
0.95 -0.045 -369 2.111 Delay (Normalized)
1.00 -0.050 -414 3.062 4.0
1.10 -10.48 -531 2.043
1.20 -25.96 -576 0.814
Delay (sec)
1.30 -39.45 -598 0.493
1.40 -52.87 -614 0.348
1.50 -69.11 -624 0.265 2.0
1.60 -89.09 -453 0.211
1.70 -85.32 -459 0.174
1.75 -89.95 -463 0.156
1.80 -103.5 -465 0.147 0.8
1.85 -95.94 -288 0.158
1.90 -89.31 -290 0.126 0.0 0.15 2 3 4 5 6 7 89
1.95 -86.44 -292 0.117 0.1 1.0 1.5
2.00 -84.96 -295 0.110 Normalized Time (1/f sec)
2.20 -84.54 -302 0.087
2.40 -88.65 -307 0.069
2.60 -99.78 -311 0.057 Step Response
2.80 -99.97 -135 0.048
Step Response (V/V)
3.00 -90.20 -139 0.041 1.2
3.50 -85.09 -145 0.029
4.00 -84.04 -150 0.022 1.0
5.00 -84.76 -156 0.014 0.8
6.00 -86.45 -160 0.009
7.00 -88.31 -163 0.007 0.6
8.00 -90.11 -165 0.005 0.4
9.00 -91.82 -167 0.004
10.0 -93.41 -168 0.003 0.2
1.Normalized Group Delay: -0.0
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc). Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
23
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Elliptic, 1.77
Appendix A Low-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 0.713
Amp (dB)
0.10 -0.004 -25.7 0.716 -40
0.20 -0.014 -51.6 0.724
0.30 -0.024 -77.9 0.740
0.40 -0.020 -105 0.767 -60
0.50 0.007 -133 0.811 -80
0.55 0.022 -148 0.840
0.60 0.033 -163 0.872 -100
0.65 0.031 -179 0.908
2 3 4 5 6 78
0.70 0.014 -196 0.946 0.1 1.0 2 3 4 5 6 7 10.0
0.75 -0.015 -213 0.989 Normalized Frequency(f/fc)
0.80 -0.041 -232 1.04
0.85 -0.046 -251 1.12
0.90 -0.016 -272 1.23
0.95 -0.025 -296 1.40 Delay (Normalized)
1.00 -0.035 -323 1.65 4.0
1.10 -1.76 -392 2.14
1.20 -8.28 -467 1.86
Delay (sec)
1.30 -18.4 -522 1.19
1.40 -29.3 -558 0.753
1.50 -40.1 -578 0.517 2.0
1.60 -51.5 -594 0.381
1.70 -65.2 -606 0.296
1.75 -75.0 -611 0.265
1.80 -113.0 -616 0.239 0.8
1.85 -83.6 -440 0.217
1.90 -82.0 -444 0.198 0.0
0.15 2 3 4 5 6 7 89
1.95 -83.7 -447 0.182 0.1 1.0 1.5
2.00 -87.8 -450 0.168 Normalized Time (1/f sec)
2.20 -85.8 -280 0.126
2.40 -82.0 -289 0.099
2.60 -83.5 -295 0.081 Step Response
2.80 -88.2 -301 0.067
Step Response (V/V)
3.00 -99.9 -305 0.057 1.2
3.50 -87.2 -134 0.040
4.00 -83.1 -140 0.030 1.0
5.00 -82.1 -148 0.018 0.8
6.00 -83.1 -154 0.013
7.00 -84.6 -157 0.009 0.6
8.00 -86.2 -160 0.007 0.4
9.00 -87.8 -163 0.005
10.0 -89.3 -164 0.004 0.2
1.Normalized Group Delay: -0.0
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc). Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
24
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Elliptic, 2.00
Appendix A Low-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec) -20
0.00 0.00 0.00 0.885
Amp (dB)
0.10 -0.001 -31.9 0.891 -40
0.20 -0.015 -64.2 0.903
0.30 -0.040 -97.0 0.922 -60
0.40 -0.042 -131 0.958 -80
0.50 -0.001 -166 1.020
0.55 0.000 -185 1.057 -100
0.60 -0.007 -204 1.099
0.65 -0.027 -225 1.140 -120
2 3 4 5 6 78
0.70 -0.045 -245 1.193 0.1 1.0 2 3 4 5 6 7 10.0
0.75 -0.040 -268 1.269 Normalized Frequency(f/fc)
0.80 -0.014 -291 1.377
0.85 -0.001 -317 1.513
0.90 -0.031 -346 1.677
0.95 -0.036 -378 1.960 Delay (Normalized)
1.00 -0.046 -419 2.681 4.0
1.10 -7.910 -525 2.127
1.20 -21.06 -573 0.856
Delay (sec)
1.30 -31.96 -597 0.509
1.40 -41.51 -612 0.357
1.50 -50.35 -623 0.271 2.0
1.60 -58.90 -632 0.216
1.70 -67.54 -639 0.177
1.75 -72.04 -642 0.162
1.80 -76.79 -645 0.149 0.8
1.85 -81.93 -647 0.138
1.90 -87.78 -650 0.128 0.0
0.15 2 3 4 5 6 7 89
1.95 -95.04 -652 0.119 0.1 1.0 1.5
2.00 -106.6 -654 0.111 Normalized Time (1/f sec)
2.20 -106.0 -481 0.087
2.40 -121.3 -307 0.070
2.60 -106.5 -311 0.058 Step Response
2.80 -105.0 -315 0.049
Step Response (V/V)
3.00 -106.4 -318 0.042 1.2
3.50 -123.6 -325 0.030
4.00 -111.5 -149 0.022 1.0
5.00 -105.4 -156 0.014 0.8
6.00 -105.1 -160 0.010
7.00 -106.0 -163 0.007 0.6
8.00 -107.3 -165 0.005 0.4
9.00 -108.6 -167 0.004
10.0 -110.0 -168 0.003 0.2
1.Normalized Group Delay: -0.0
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc). Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
25
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
High-Pass
8-Pole
Appendix A Butterworth
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.10 -160 691 0.819
Amp (dB)
0.20 -112 661 0.828 -40
0.30 -83.7 631 0.843
0.40 -63.7 600 0.867 -60
0.50 -48.2 568 0.903
0.60 -35.5 535 .956 -80
0.70 -24.8 499 1.04
0.80 -15.6 459 1.19 -100
0.85 -11.6 437 1.29 2 3 4 5 6 78
0.90 -8.06 413 1.40 0.1 1.0 2 3 4 5 6 7 10.0
Normalized Frequency(f/fc)
0.95 -5.15 386 1.48
1.00 -3.01 360 1.46
1.20 -0.229 275 0.873
1.40 -0.020 226 0.540
1.60 -0.002 194 0.380
1.80 0.00 170 0.287
2.00 0.00 152 0.226
2.50 0.00 120 0.139
3.00 0.00 99.2 0.094
4.00 0.00 74.0 0.052
5.00 0.00 59.0 0.033
6.00 0.00 49.0 0.023
7.00 0.00 42.1 0.017
8.00 0.00 36.8 0.013
9.00 0.00 32.7 0.010
10.0 0.00 29.4 0.008
1.Normalized Group Delay:
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided
by the actual corner frequency (fc).
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
29
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Elliptic, 1.56
Appendix A High-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.10 -93.4 168 0.334
Amp (dB)
0.20 -84.8 156 0.344 -40
0.30 -86.0 143 0.363
0.40 -92.6 310 0.392 -60
0.50 -85.0 295 0.439
0.55 -114 287 0.472 -80
0.60 -84.1 458 0.515
0.70 -57.0 617 0.652 -100
0.80 -32.8 589 0.962 2 3 4 5 6 78
0.85 -22.6 569 1.325 0.1 1.0 2 3 4 5 6 7 10.0
Normalized Frequency(f/fc)
0.90 -12.3 538 2.198
0.95 -3.08 483 3.993
1.00 -0.05 414 3.062
1.10 -0.03 341 1.498
1.20 -0.01 296 1.039
1.30 -0.04 264 0.773
1.40 -0.05 239 0.612
1.50 -0.03 219 0.505
1.60 -0.01 202 0.426
1.70 0.00 188 0.364
1.80 0.00 176 0.315
1.90 -0.01 165 0.275
2.00 -0.02 156 0.243
2.50 -0.05 122 0.145
3.00 -0.05 101 0.097
4.00 -0.03 75.1 0.053
5.00 -0.01 59.8 0.034
6.00 -0.01 49.7 0.023
7.00 0.00 42.5 0.017
8.00 0.00 37.2 0.013
9.00 0.00 33.0 0.010
10.0 0.00 29.7 0.008
1.Normalized Group Delay:
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided
by the actual corner frequency (fc).
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
36
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Elliptic, 1.77
Appendix A High-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.10 -89.3 164 0.440
Amp (dB)
0.20 -82.1 148 0.459 -40
0.30 -90.6 131 0.495
0.40 -82.4 292 0.559 -60
0.50 -87.8 450 0.671
0.55 -90.0 437 0.761 -80
0.60 -60.2 603 0.890
0.70 -32.4 563 1.37 -100
0.80 -13.1 498 2.35 2 3 4 5 6 78 1.0 2 3 4 5 67
0.85 -6.28 451 2.77 0.1 10.0
Normalized Frequency(f/fc)
0.90 -2.21 401 2.66
0.95 -0.51 358 2.15
1.00 -0.03 324 1.64
1.10 -0.01 277 1.04
1.20 -0.05 225 0.757
1.30 -0.03 221 0.596
1.40 0.01 201 0.486
1.50 0.03 185 0.409
1.60 0.03 172 0.347
1.70 0.03 160 0.299
1.80 0.02 150 0.260
1.90 0.01 141 0.229
2.00 0.01 133 0.203
2.50 -0.02 105 0.123
3.00 -0.02 86.9 0.083
4.00 -0.02 64.7 0.046
5.00 -0.01 51.6 0.029
6.00 -0.01 42.9 0.020
7.00 -0.01 36.8 0.015
8.00 -0.01 32.1 0.011
9.00 -0.01 28.6 0.009
10.0 0.00 25.7 0.007
1.Normalized Group Delay:
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided
by the actual corner frequency (fc).
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
37
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Elliptic, 2.00
Appendix A High-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec) -20
0.10 -110 168 0.338
Amp (dB)
0.20 -105 156 0.348 -40
0.30 -114 323 0.367 -60
0.40 -110 309 0.397
0.50 -107 654 0.445 -80
0.55 -78.6 646 0.480 -100
0.60 -64.6 637 0.524
0.70 -44.1 615 0.669 -120
0.80 -26.7 586 1.001 2 3 4 5 6 78
0.85 -18.2 565 1.401 0.1 1.0 2 3 4 5 6 7 10.0
Normalized Frequency(f/fc)
0.90 -9.46 533 2.315
0.95 -2.16 478 3.604
1.00 -0.046 419 2.681
1.10 -0.038 352 1.416
1.20 -0.001 308 1.018
1.30 -0.032 277 0.773
1.40 -0.046 252 0.618
1.50 -0.034 231 0.514
1.60 -0.016 214 0.436
1.70 -0.004 200 0.376
1.80 0.000 187 0.328
1.90 -0.003 176 0.288
2.00 -0.010 166 0.255
2.50 -0.042 131 0.153
3.00 -0.045 108 0.103
4.00 -0.028 80.6 0.057
5.00 -0.015 64.2 0.036
6.00 -0.008 53.4 0.025
7.00 -0.005 45.7 0.018
8.00 -0.003 40.0 0.014
9.00 -0.002 35.5 0.011
10.0 -0.001 31.9 0.009
1.Normalized Group Delay:
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided
by the actual corner frequency (fc).
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
38
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