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D51 Series

C-Message Response

Specifications

Pin-out and package data


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D51 Series
Telephone Message &
Circuit Noise Measurement
January, 2005
 

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Description

The D51 is designed specifically to provide the C-message weighting frequency response specified in Bell System Technical Reference 41009 for telephone message circuit noise measurement. The theoretical C-message characteristic simulates the perceived response of the human ear to telephone noise.

All D51 Series filters provide a close ± 1dB approximation to the theoretical C-message weighting function from 60 Hz to 5.0 kHz.

 

Applications

  • Telephone Message Circuit Noise Measurement
  • Test Equipment

Theoretical Frequency Response

Frequency
Hz
Attenuation
dB
Tolerance
+/-dB
60
55.7
1
100
42.5
1
200
25.0
1
300
16.5
1
400
11.4
1
500
7.5
1
600
4.7
1
700
2.7
1
800
1.5
1
900
0.6
1
1000
0.0
0.1
1200
0.2
1
1300
0.5
1
1500
1.0
1
1800
1.3
1
2000
1.3
1
2500
1.4
1
2800
1.9
1
3000
2.5
1
3300
5.2
1
3500
7.6
1
4000
14.5
1
4500
21.5
1
5000
28.5
1

 


Specifications

(@ 25°C and Vs ±15 Vdc)

Analog Input Characteristics
  • Impedance: 10 kΩ min.
  • Source Impedance1: 600 Ω max.
  • Bias Current 2: 0
  • Voltage Range: ± 10 Vpeak
  • Max. Safe Voltage: ± Vs

Analog Output Characteristics

  • Impedance(Closed Loop):
    < 1 Ω typ., 10 Ω max.
  • Linear Operating Range: ± 10 V
  • Maximum Current3: ± 2 mA
  • Offset Voltage: ± 5 mV
  • Offset Temp. Coeff.: 50 µV / °C
  • Noise4: 50 µVRMS

Gain (non-inverting) 0 ± 0.1 dB @ 1 kHz

Power Supply (± Vs)
  • Rated Voltage: ± 15 Vdc
  • Operating Range: ± 5 to ± 18 Vdc
  • Maximum Safe Voltage: ± 18 Vdc
  • Quiescent Current:
    ± 1.5 mA typ., ± 2.0 mA max.

Temperature

  • Operating: 0 to + 70°C
  • Storage: -25 to+85°C
Notes:
  1. Maximum allowable series input resistance if gain accuracy's are to be maintained.
  2. Capacitor coupled.
  3. Output is short circuit protected to common. DO NOT CONNECT TO ±Vs.
  4. DC to 50 kHZ excluding DC offset with input grounded.


Pin-Out and Package Data

Filter Mounting Assembly - See FMA-01S


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.


Frequency Devices, Inc.
Your engineering partner for signal conditioning
  1784 Chessie Lane
Ottawa, IL 61350

Fax: (815) 434-8176
e-mail: sales@freqdev.com

 

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or (800) 252-7074 (U.S. only)

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