BS 727:1983

Foreword
Committees responsible
Specification
Section one. General
1 Scope
2 Definitions
Section two. Measuring apparatus
3 General
4 Quasi-peak measuring receiver for the frequency
      range 9 kHz to 1000 MHz
5 Peak measuring receiver for the frequency range
      9 kHz to 1000 MHz
6 Average measuring receiver for the frequency range
      9 kHz to 100 MHz
7 Spectrum analysers
8 Disturbance analysers
9 Artificial mains networks
10 Ferrite clamp for use in the frequency range 30
      MHz to 300 MHz
11 Current probe for use in the frequency range 9 kHz
      to 100 MHz
12 Marking
Appendices
A Determination of response to repeated pulses
B Determination of pulse generator spectrum
C Accurate measurements of the output of nanosecond
      pulse generators
D Influence of the receiver characteristics upon its
      pulse response
E Bandwidth of average measuring receivers
F Available designs and use of spectrum analysers
G Alternative method for measuring the rate and
      duration of disturbances
H Use of aerials with measuring receivers
J Voltage measurement using voltae probes
K Calibration and use of ferrite clamp
Tables
1 Fundamental characteristics of quasi-peak
      measuring receivers
2 Test pulse characteristics for quasi-peak
      measuring receivers
3 Pulse response of quasi-peak measuring receivers
4 Bandwidth characteristics for intermodulation
      test of quasi-peak measuring receivers
5 Relative pulse response of peak and quasi-peak
      meters
6(a) Disturbance analyser. Tests for amplitudes,
      durations and spacings
6(b) Disturbance analyser. Tests using high level
      pulses
6(c) Disturbance analyser. Tests using multiple pulses
7 Component values for the 50 ohm/50 micro H network
8 Component values for the 150 ohm network
9 Pulse generator characteristics
Figures
1(a) Pulse response curve for frequency range 9 kHz to
      150 kHz
1(b) Pulse response curve for frequency range 0.15 MHz
      to 30 MHz
1(c) Pulse response curve for frequency range 30 MHz
      to 1000 MHz
2(a) Limits of overall selectivity (pass-band) for the
      frequency range 9 kHz to 150 kHz
2(b) Limits of overall selectivity (pass-band) for the
      frequency range 0.15 MHz to 30 MHz
2(c) Limits of overall selectivity (pass-band) for the
      frequency range 30 MHz to 1000 MHz
3 Arrangement for testing for intermodulation
      effects
4 Impedance versus frequency characteristic of 50
      ohm/50 micro H, artificial mains network
5 Artificial mains network
6 Impedance versus frequency characteristic of 50
      ohm/5 micro H, artificial mains network
7 Short dipole aerial factors for RL = 50 ohms
8 Circuit for r.f. voltage probe measurements on
      supply mains
9 Construction of ferrite clamp
10 Calibration data for ferrite clamp
11 Method of measurement using ferrite clamp
12 Method of adjustment of clamp position for maximum
      indication

Specifies radio interference measuring apparatus for the frequency range 0.009 MHz to 1000 MHz. Based on CISPR Publication 16 and intended for use as a specific reference for the legal implementation of regulations on the permissible limits of radio interference. Methods of use of the apparatus are given in appendices.