Part V - Airworthiness Manual Chapter 523 - Normal, Utility, Aerobatic And Commuter Category Aeroplanes

Canadian Aviation Regulations (CARs) 2017-2

Content last revised: 2002/01/29

Preamble

SUBCHAPTERS

  • A (523.1-523.3),
  • B (523.21-523.253),
  • C (523.301-523.575),
  • D (523.601-523.871),
  • E (523.901-523.1203),
  • F (523.1301-523.1461),
  • G (523.1501-523.1589)

APPENDICES

A, B, C, D, E, F, G, H, I, J

(2008/10/30; no previous version)

APPENDIX J

HIRF Environments and Equipment HIRF Test Levels

This appendix specifies the HIRF environments and equipment HIRF test levels for electrical and electronic systems under 523.1308. The field strength values for the HIRF environments and equipment HIRF test levels are expressed in root-mean-square units measured during the peak of the modulation cycle.
(amended 2008/10/30; no previous version)

  1. (a) HIRF environment I is specified in the following table:
    (amended 2008/10/30; no previous version)

    Table I - HIRF Environment I
    (amended 2008/10/30; no previous version)

    FREQUENCY FIELD STRENGTH (volts/meter)
    PEAK AVERAGE
    10 kHz - 2 MHz 50 50
    2 MHz – 30 MHz 100 100
    30 MHz – 100 MHz 50 50
    100 MHz – 400 MHz 100 100
    400 MHz – 700 MHz 700 50
    700 MHz – 1 GHz 700 100
    1 GHz – 2 GHz 2 000 200
    2 GHz – 6 GHz 3 000 200
    6 GHz – 8 GHz 1 000 200
    8 GHz – 12 GHz 3 000 300
    12 GHz – 18 GHz 2 000 200
    18 GHz – 40 GHz 600 200
    In this table, the higher field strength applies at the frequency band edges
  2. (b) HIRF environment II is specified in the following table:
    (amended 2008/10/30; no previous version)

    Table II - HIRF Environment II
    (amended 2008/10/30; no previous version)

    FREQUENCY FIELD STRENGTH (volts/meter)
    PEAK AVERAGE
    10 kHz – 500 kHz 20 20
    500 kHz – 2 MHz 30 30
    2 MHz – 30 MHz 100 100
    30 MHz – 100 MHz 10 10
    100 MHz – 200 MHz 30 10
    200 MHz – 400 MHz 10 10
    400 MHz – 1 GHz 700 40
    1 GHz – 2 GHz 1 300 160
    2 GHz – 4 GHz 3 000 120
    4 GHz – 6 GHz 3 000 160
    6 GHz – 8 GHz 4 00 170
    8 GHz – 12 GHz 1 230 230
    12 GHz – 18 GHz 730 190
    18 GHz – 40 GHz 600 150
    In this table, the higher field strength applies at the frequency band edges
  3. (c) Equipment HIRF Test Level 1
    (amended 2008/10/30; no previous version)

    1. (1) From 10 kilohertz (kHz) to 400 megahertz (MHz), use conducted susceptibility tests with continuous wave (CW) and 1 kHz square wave modulation with 90 percent depth or greater. The conducted susceptibility current shall start at a minimum of 0.6 milliamperes (mA) at 10 kHz, increasing 20 decibels (dB) per frequency decade to a minimum of 30 mA at 500 kHz.
      (amended 2008/10/30; no previous version)

    2. (2) From 500 kHz to 40 MHz, the conducted susceptibility current shall be at least 30 mA.
      (amended 2008/10/30; no previous version)

    3. (3) From 40 MHz to 400 MHz, use conducted susceptibility tests, starting at a minimum of 30 mA at 40 MHz, decreasing 20 dB per frequency decade to a minimum of 3 mA at 400 MHz.
      (amended 2008/10/30; no previous version)

    4. (4) From 100 MHz to 400 MHz, use radiated susceptibility tests at a minimum of 20 volts per meter (V/m) peak with CW and 1 kHz square wave modulation with 90 percent depth or greater.
      (amended 2008/10/30; no previous version)

    5. (5) From 400 MHz to 8 gigahertz (GHz), use radiated susceptibility tests at a minimum of 150 V/m peak with pulse modulation of 4 percent duty cycle with a 1 kHz pulse repetition frequency. This signal shall be switched on and off at a rate of 1 Hz with a duty cycle of 50 percent.
      (amended 2008/10/30; no previous version)

  4. (d) Equipment HIRF Test Level 2

    Equipment HIRF test level 2 is HIRF environment II in table II of this appendix reduced by acceptable aircraft transfer function and attenuation curves. Testing shall cover the frequency band of 10 kHz to 8 GHz.
    (amended 2008/10/30; no previous version)

  5. (e) Equipment HIRF Test Level 3
    (amended 2008/10/30; no previous version)

    1. (1) From 10 kHz to 400 MHz, use conducted susceptibility tests, starting at a minimum of 0.15 mA at 10 kHz, increasing 20 dB per frequency decade to a minimum of 7.5 mA at 500 kHz.
      (amended 2008/10/30; no previous version)

    2. (2) From 500 kHz to 40 MHz, use conducted susceptibility tests at a minimum of 7.5 mA.
      (amended 2008/10/30; no previous version)

    3. (3) From 40 MHz to 400 MHz, use conducted susceptibility tests, starting at a minimum of 7.5 mA at 40 MHz, decreasing 20 dB per frequency decade to a minimum of 0.75 mA at 400 MHz.
      (amended 2008/10/30; no previous version)

    4. (4) From 100 MHz to 8 GHz, use radiated susceptibility tests at a minimum of 5 V/m.
      (amended 2008/10/30; no previous version)

Date modified: