|Vehicles, boats and other internal combustion engines.|
|RF emissions measurement for the protection of on-board receivers.
Relates to whole vehicle and to components (original equipment and aftermarket)
The table below shows the test requirements and ancillary items.
Common to all tests are an EMC analyser (SA1002 or SA3000), pre-selector (RF910), pre-amplifier (SA1020) and associated software (included with the EMC analyser).
|EN 55025 Clause||Item||Type||Freq. range
|5||Whole vehicle||Radiated||As specified||On-board antenna||Antenna matching unit
|0.5 -30||1m monopole|
|30 – 1000||¼ wave monopole|
0.15 - 2500
|On-board antenna||LISN (CISPR16)
HV AN (CISPR25)
|6||Components & modules||Conducted||0.15 - 108||LISN||LISN (CISPR25)|
|0.15 - 245||Current probe||Current probe|
|Radiated||0.15- 30||Antenna+ ALSE||1m monopole|
|30- 2500||Antenna + ALSE||Broadband antenna|
|Annex F||0.15 – 245 (limited by cell size)||TEM cell||TEM cell|
|Annex G||0.15 – 980 (limited by stripline design)||Stripline||Stripline|
ALSE = Absorber Lined Screened Enclosure.
Limits applicable to each test are included in the EMCEngineer software issued with the Laplace EMC analysers
Emissions received by antenna on same vehicle.
Antenna is the one normally fitted to the vehicle. If non fitted, use 1m monopole (band B) or loaded ¼ wave monopole (band C & D).
Antenna matching unit reqd: Input imp. >100K II <10pF , Output imp.: 50R
Additional tests when vehicle is in charging mode.
AC mains: LISN: 50uH/50R AMN CISPR16
DC cable: LISN: 5uH/50R HV-AN High voltage
Comms lines: AAN (Artificial Asymmetric Network)
Components & modules:
Power via 5uH AN (annex E)
Conducted emissions, LISN 5uH/50R, CISPR25 0.15 – 108MHz (All detectors)
Conducted emissions, current probe, 0.15 – 245MHz (Pk and Ave)
Radiated emissions, 1m monopole, 0.15 – 30MHz in ALSE
Radiated emissions, broadband antenna(s), 30 – 2500MHz in ALSE
5uH LISN i/p C = 1uF, 0/p C = 0.1uF, shunt R = 1K (CISPR25)
5uH HV AN i/p C = 0.1uF, o/p C = 0.1uF, shunt = 1K. Additional discharge R = 1M
AAN for comms lines: CDN (to give 150R impedance) For matching only.