BS 6840-10:1991

Committees responsible
National foreword
Methods
Section 1. General
1.1 Scope
1.2 Normative references
Section 2. Conditions for specification and measurement
2.1 Conditions
2.2 Description of peak programme level meters
Section 3. Characteristics of peak programme level
           meters
3.1 Reference indication
3.2 Reference input voltage and reference input level
3.3 Division of the scale
3.4 Amplitude-frequency response
3.5 Dynamic response
3.6 Pulse response
3.7 Dynamic linearity with scale range
3.8 Dynamic response below minimum calibration point
3.9 Delay time
3.10 Integration time
3.11 Overswing
3.12 Return time
3.13 Reversibility error
3.14 Input impedance
3.15 Distortion introduced by the peak programme level
      meter
3.16 Temperature range
3.17 Overload characteristics
3.18 Maximum input level
3.19 Supply voltage range
Section 4. Peak programme level meters, type I
4.1 Reference indication
4.2 Reference input voltage and reference input level
4.3 Division of the scale
4.4 Amplitude-frequency response
4.5 Dynamic response
4.6 Integration time
4.7 Overswing
4.8 Return time
4.9 Reversibility error
4.10 Input impedance
4.11 Distortion introduced by the peak programme level
      meter
4.12 Temperature range
4.13 Overload characteristic
4.14 Maximum input level
4.15 Supply voltage range
Section 5. Peak programme level meters, type II
5.1 General
5.2 Reference indication
5.3 Reference input voltage
5.4 Indicating instrument
5.5 Amplitude-frequency response
5.6 Dynamic response
5.7 Pulse response (normal mode)
5.8 Dynamic linearity within scale range (normal mode)
5.9 Dynamic response below minimum calibration point
      (normal mode)
5.10 Delay time (normal mode)
5.11 Integration time
5.12 Overswing
5.13 Return time
5.14 Reversibility error
5.15 Input impedance
5.16 Distortion introduced by the peak programme level
      meter
5.17 Temperature range
5.18 Overload characteristic (normal mode)
5.19 Maximum input level
5.20 Supply voltage range
Section 6. Peak programme level meters having
           incremental display
6.1 General
6.2 Number of discrete elements in the display
6.3 Display resolution
6.4 Indication of levels
6.5 Optical characteristics of displays
6.6 Operation above reference indication
6.7 Displays using multiplex technique
6.8 Rate of element-switching (switch-on - switch-off
      times)
Section 7. Incremental peak programme level meters for
           secondary and consumer applications
7.1 General
7.2 Reference indication
7.3 Number of discrete elements in the display
7.4 Display resolution
7.5 Amplitude-frequency response
7.6 Integration time
7.7 Return time
7.8 Reversibility error
Section 8. Classification for the characteristics to be
           specified
8.1 Introduction
8.2 Classification
Annexes
A. (normative) Slow mode of operation
B. (informative) Details of preferred indicating
      instrument

Characteristics, relevant methods of measurement and performance requirements (in some cases) for audio frequency peak programme level meters for use in equipment for broadcasting, sound reinforcement, sound recording and household entertainment.

This part of IEC 268 applies to audio-frequency peak programme level meters, for use in equipment for broadcasting, sound reinforcement, sound recording and household entertainment.

This standard does not apply to “Standard volume indicators?? which is dealt with in IEC 268-17.