CISPR 25:2008/COR1:2009

CISPR 25
(Third edition – 2008)
Vehicles, boats and internal combustion engines – Radio disturbance characteristics –
Limits and methods of measurement for the protection of on-board receivers

CORRIGENDUM 1
Figure 1 – Method of determination of conformance for all frequency bands

Replace the existing figure and notes by the following:

Start
(1)
Applicable limits  :
Average and peak Average and quasi-peak
average and peak or
average and quasi-peak?
Measurement with
Measurement with
peak detector
peak detector
(2) (2)
Are the peak Are the peak
Yes Yes
data below the
data below the
average limit?
average limit?
No No
Are the peak
Are the peak Yes Yes
data below the
data below the
quasi-peak limit?
peak limit?
No
No
Measurement with
(3)
quasi-peak detector
Are the quasi-peak
Yes
data below the
quasi-peak limit?
No
Measurement with Measurement with
(3) (3)
average detector average detector
No Are the average Are the average No
Yes Yes
data below the data below the
average limit? average limit?
Fail Pass Fail
IEC  051/09
January 2009
NOTE 1 The conformance should normally be obtained by compliance to both average and peak limits or both
average and quasi-peak limits unless the test plan defines that conformance can be obtained by compliance to the
single appropriate limit) (depending on the case, peak, or average, or quasi-peak).
NOTE 2 Because measurement with peak detector is always higher or equal to measurement with average
detector and applicable peak limit is always higher or equal to applicable average limit, this single detector
measurement can lead to a simplified and quicker conformance process.
NOTE 3 This flow-chart is applicable for each individual frequency, e.g. only frequencies that are above the
applicable limit need be remeasured with average or quasi-peak detector.

Figure 4 – Average limit for radiated disturbances from vehicles GPS band
1 567,42 to 1 583,42 MHz
In the existing figure, replace “Level dB (μV/m)” by:

Level dB(µV)
–10
Frequency  (MHz)
IEC  052/09
January 2009
Level dB  (μV)
1 567,42
1 568,42
1 569,42
1 570,42
1 571,42
1 572,42
1 573,42
1 574,42
1 575,42
1 576,42
1 577,42
1 578,42
1 579,42
1 580,42
1 581,42
1 582,42
1 583,42
CISPR 25
(Troisième édition – 2008)
Véhicules, bateaux et moteurs à combustion interne – Caractéristiques des
perturbations radioélectriques – Limites et méthodes de mesure pour la protection des
récepteurs embarqués
CORRIGENDUM 1
Figure 1 – Méthode pour déterm
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