{
  "url": "https://openlegislation.uk/wireless-telegraphy-control-of-interference-from-ignition-apparatus-regulations-1952/schedule/paragraph-2",
  "json_url": "https://openlegislation.uk/wireless-telegraphy-control-of-interference-from-ignition-apparatus-regulations-1952/schedule/paragraph-2.json",
  "legislation": "uksi/1952/2023",
  "legislation_title": "The Wireless Telegraphy (Control of Interference from Ignition Apparatus) Regulations 1952",
  "legislation_url": "https://openlegislation.uk/wireless-telegraphy-control-of-interference-from-ignition-apparatus-regulations-1952",
  "path": "schedule/paragraph/2",
  "kind": "paragraph",
  "number": "2",
  "heading": "General description of measuring apparatus",
  "text": "The measuring apparatus shall be a calibrated radio receiver, covering the frequency range 40 Mc/s–70 Mc/s, designed for the measurement of the field-strength of radio frequency noise. For this measurement the input terminals of the receiver shall be connected to a dipole aerial by a balanced screened feeder. The receiver shall be of the superheterodyne type and comprise a radio-frequency (R.F.) amplifier, a frequency changer, an intermediate-frequency (I.F.) amplifier and an output valve-voltmeter. Attenuators, calibrated in decibels (db), shall be provided in the input circuits of both R.F. and I.F. amplifiers. The indicating meter of the valve-voltmeter shall have a scale provided with zero and full-scale marks and a reference deflection mark at mid-scale. The measuring apparatus shall be calibrated in terms of a known intensity of a continuous wave field in which the associated aerial system is placed. Facilities shall be provided so that, whenever a measurement is to be made, the gain of the receiver of the measuring apparatus may be set to the gain used when it was calibrated.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1952/2023/schedule/paragraph/2",
    "retrieved_at": "2026-10-30T01:54:43.854806+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}