Standard |
EN55025 |
Scope |
Vehicles, boats and other internal combustion engines. |
Type |
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 (MHz) |
Method | Ancillaries |
| 5 | Whole vehicle | Radiated | As specified | On-board antenna | Antenna matching unit ALSE |
| 0.5 -30 | 1m monopole | ||||
| 30 – 1000 | ¼ wave monopole | ||||
| 1000-2500 | As recommended | ||||
| Whole vehicle Charging mode |
Appropriate bands.
0.15 - 2500 |
On-board antenna | LISN (CISPR16) HV AN (CISPR25) AAN |
||
| 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 |
Notes:
ALSE = Absorber Lined Screened Enclosure.
Limits applicable to each test are included in the EMCEngineer software issued with the Laplace EMC analysers
Clause 5:
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)
Clause 6:
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
Annex E:
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
50uH/50R CISPR16
AAN for comms lines: CDN (to give 150R impedance) For matching only.