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What is the acceptable margin for radiated emission on an European CE device
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One of our prototype (IOT gateway) has completed the emission test (EMC) but we have a margin on two particular frequencies, just wondering what is the acceptable margin for CE device in Europe ? I have been through various sites but still not able to figure out this the Margin acceptable. This will be installed at private sites (with public access).
For 160 MHz - Limit=40dBµV/m QuasiPeak=37.20 Margin=-2.80
For 550 MHz - Limit=47dBµV/m QuasiPeak=43.01 Margin=-3.99
Any suggestion would be greatly appreciated !!
radiation emissions
asked 1 hour ago
rajeshk
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up vote
2
down vote
favorite
One of our prototype (IOT gateway) has completed the emission test (EMC) but we have a margin on two particular frequencies, just wondering what is the acceptable margin for CE device in Europe ? I have been through various sites but still not able to figure out this the Margin acceptable. This will be installed at private sites (with public access).
For 160 MHz - Limit=40dBµV/m QuasiPeak=37.20 Margin=-2.80
For 550 MHz - Limit=47dBµV/m QuasiPeak=43.01 Margin=-3.99
Any suggestion would be greatly appreciated !!
radiation emissions
asked 1 hour ago
rajeshk
1112
New contributor
rajeshk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |Â
up vote
2
down vote
favorite
up vote
2
down vote
favorite
One of our prototype (IOT gateway) has completed the emission test (EMC) but we have a margin on two particular frequencies, just wondering what is the acceptable margin for CE device in Europe ? I have been through various sites but still not able to figure out this the Margin acceptable. This will be installed at private sites (with public access).
For 160 MHz - Limit=40dBµV/m QuasiPeak=37.20 Margin=-2.80
For 550 MHz - Limit=47dBµV/m QuasiPeak=43.01 Margin=-3.99
Any suggestion would be greatly appreciated !!
radiation emissions
asked 1 hour ago
rajeshk
1112
New contributor
rajeshk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
One of our prototype (IOT gateway) has completed the emission test (EMC) but we have a margin on two particular frequencies, just wondering what is the acceptable margin for CE device in Europe ? I have been through various sites but still not able to figure out this the Margin acceptable. This will be installed at private sites (with public access).
For 160 MHz - Limit=40dBµV/m QuasiPeak=37.20 Margin=-2.80
For 550 MHz - Limit=47dBµV/m QuasiPeak=43.01 Margin=-3.99
Any suggestion would be greatly appreciated !!
radiation emissions
radiation emissions
asked 1 hour ago
rajeshk
1112
New contributor
rajeshk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
rajeshk
1112
New contributor
rajeshk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
rajeshk
1112
New contributor
rajeshk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
rajeshk
1112
asked 1 hour ago
rajeshk
1112
1112
New contributor
rajeshk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
rajeshk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
rajeshk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |Â
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2 Answers
2
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oldest
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up vote
5
down vote
It's a limit, defined in CISPR 11 and other places. So anything below the limit is fine. If you're at the limit exactly it's a bit fuzzy situation, I can't remember off hand if the limit is up to and including the cut-off value.
In any case, 4dB is a healthy margin, 2.8dB isn't anything to lose sleep over. If the margin is very small e.g. <1dB you might fail at another time and different test lab, just because of how the cables are arranged, equipment calibration and so on. In most situations, if you're -0.1dB, they stamp the certificate and off you go.
If you supply parts for a larger assembly, this attitude can come back to bite you when the client retests the entire setup.
From your test limits, it seems you're testing Class B "normal" commercial or domestic environment device at 3 meter antenna position.
answered 58 mins ago
Barleyman
2,476314
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up vote
2
down vote
There is no margin. You have to ensure your production units are below the limit, even if only by 0.1dB.
answered 1 hour ago
Lior Bilia
4,32611024
add a comment |Â
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
5
down vote
It's a limit, defined in CISPR 11 and other places. So anything below the limit is fine. If you're at the limit exactly it's a bit fuzzy situation, I can't remember off hand if the limit is up to and including the cut-off value.
In any case, 4dB is a healthy margin, 2.8dB isn't anything to lose sleep over. If the margin is very small e.g. <1dB you might fail at another time and different test lab, just because of how the cables are arranged, equipment calibration and so on. In most situations, if you're -0.1dB, they stamp the certificate and off you go.
If you supply parts for a larger assembly, this attitude can come back to bite you when the client retests the entire setup.
From your test limits, it seems you're testing Class B "normal" commercial or domestic environment device at 3 meter antenna position.
answered 58 mins ago
Barleyman
2,476314
add a comment |Â
up vote
5
down vote
It's a limit, defined in CISPR 11 and other places. So anything below the limit is fine. If you're at the limit exactly it's a bit fuzzy situation, I can't remember off hand if the limit is up to and including the cut-off value.
In any case, 4dB is a healthy margin, 2.8dB isn't anything to lose sleep over. If the margin is very small e.g. <1dB you might fail at another time and different test lab, just because of how the cables are arranged, equipment calibration and so on. In most situations, if you're -0.1dB, they stamp the certificate and off you go.
If you supply parts for a larger assembly, this attitude can come back to bite you when the client retests the entire setup.
From your test limits, it seems you're testing Class B "normal" commercial or domestic environment device at 3 meter antenna position.
answered 58 mins ago
Barleyman
2,476314
add a comment |Â
up vote
5
down vote
up vote
5
down vote
It's a limit, defined in CISPR 11 and other places. So anything below the limit is fine. If you're at the limit exactly it's a bit fuzzy situation, I can't remember off hand if the limit is up to and including the cut-off value.
In any case, 4dB is a healthy margin, 2.8dB isn't anything to lose sleep over. If the margin is very small e.g. <1dB you might fail at another time and different test lab, just because of how the cables are arranged, equipment calibration and so on. In most situations, if you're -0.1dB, they stamp the certificate and off you go.
If you supply parts for a larger assembly, this attitude can come back to bite you when the client retests the entire setup.
From your test limits, it seems you're testing Class B "normal" commercial or domestic environment device at 3 meter antenna position.
answered 58 mins ago
Barleyman
2,476314
It's a limit, defined in CISPR 11 and other places. So anything below the limit is fine. If you're at the limit exactly it's a bit fuzzy situation, I can't remember off hand if the limit is up to and including the cut-off value.
In any case, 4dB is a healthy margin, 2.8dB isn't anything to lose sleep over. If the margin is very small e.g. <1dB you might fail at another time and different test lab, just because of how the cables are arranged, equipment calibration and so on. In most situations, if you're -0.1dB, they stamp the certificate and off you go.
If you supply parts for a larger assembly, this attitude can come back to bite you when the client retests the entire setup.
From your test limits, it seems you're testing Class B "normal" commercial or domestic environment device at 3 meter antenna position.
answered 58 mins ago
Barleyman
2,476314
answered 58 mins ago
Barleyman
2,476314
answered 58 mins ago
Barleyman
2,476314
answered 58 mins ago
Barleyman
2,476314
2,476314
add a comment |Â
add a comment |Â
up vote
2
down vote
There is no margin. You have to ensure your production units are below the limit, even if only by 0.1dB.
answered 1 hour ago
Lior Bilia
4,32611024
add a comment |Â
up vote
2
down vote
There is no margin. You have to ensure your production units are below the limit, even if only by 0.1dB.
answered 1 hour ago
Lior Bilia
4,32611024
add a comment |Â
up vote
2
down vote
up vote
2
down vote
There is no margin. You have to ensure your production units are below the limit, even if only by 0.1dB.
answered 1 hour ago
Lior Bilia
4,32611024
There is no margin. You have to ensure your production units are below the limit, even if only by 0.1dB.
answered 1 hour ago
Lior Bilia
4,32611024
answered 1 hour ago
Lior Bilia
4,32611024
answered 1 hour ago
Lior Bilia
4,32611024
answered 1 hour ago
Lior Bilia
4,32611024
4,32611024
add a comment |Â
add a comment |Â
rajeshk is a new contributor. Be nice, and check out our Code of Conduct.
rajeshk is a new contributor. Be nice, and check out our Code of Conduct.
rajeshk is a new contributor. Be nice, and check out our Code of Conduct.
rajeshk is a new contributor. Be nice, and check out our Code of Conduct.
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