I would like to ask two questions to my fellow forum members.

QWE4562009

I would like to ask two questions to my fellow forum members. [Copy link]

 

I would like to ask two questions to my fellow forum members.

1. Are EMC and safety regulations the same thing? And reliability testing, do they have a standard for each of them?

2. Now we have a problem, putting 4G modules into smart products.

Two-layer board: higher transmission power, but not enough sensitivity

Four-layer board: lower transmission power, higher sensitivity?

When one problem is solved, another one pops up. From what angles do we usually solve this problem?

maychang

"1. Are EMC and safety regulations the same thing? And reliability testing, do they have a standard for each of them?"

None of these three are the same thing.

qwqwqw2088

Safety regulations are safety tests for products, such as leakage, waterproof, flame retardant, etc.
EMC is electromagnetic compatibility, electromagnetic interference, harassment, etc.

qwqwqw2088

The 4G module has a higher transmission power, but the sensitivity is not enough

It is a comprehensive problem, and the specific board needs specific analysis.

Nothing more

1. The product itself has design defects, causing internal noise

2. It depends on the base station signal strength, antenna gain, or external noise, which depends on the surrounding environment of the product, such as environmental interference, industrial equipment noise, atmospheric noise, etc.

QWE4562009

qwqwqw2088 posted on 2021-4-16 13:16 Safety regulations are safety tests for products, such as leakage, waterproof, flame retardant, etc. EMC is electromagnetic compatibility, electromagnetic interference, harassment, etc.

Hello, is there any website to download the standards of regulatory certification?

QWE4562009

qwqwqw2088 posted on 2021-4-16 13:17 The 4G module has a higher transmission power, but the lack of sensitivity is a comprehensive problem. The specific board is analyzed specifically. There is nothing more than 1. The product itself is designed with defects...

No. You got it the other way around. The problem is that the power of a 2-layer board is 5DBM greater than that of a 4-layer board, but the sensitivity of a 4-layer board is 3-10DBM higher than that of a 2-layer board.

qwqwqw2088

QWE4562009 posted on 2021-4-18 08:34 No. You got it the other way around. The problem now is that the power of a 2-layer board is 5DBM greater than that of a 4-layer board, but the sensitivity of a 4-layer board is higher than that of a 2-layer board...

When the first floor raised the question, the first floor host did not provide such specific test data.

Got it the other way around?

Who said that?

qwqwqw2088

QWE4562009 posted on 2021-4-18 08:32 Hello, Mr. Xiang! Is there any website that can download the standards for regulatory certification?

The national standards and specifications for safety testing and EMC testing are public and can be downloaded at will.

Provide the host with an authoritative national standard download website

Netizens passing by can also collect it

qwqwqw2088

Recommend a website where you can download the standard

QWE4562009

qwqwqw2088 posted on 2021-4-18 09:56 Recommend a website where you can download the standard

What about the regulations or system? There is no such thing as 13485.

QWE4562009

qwqwqw2088 posted on 2021-4-18 09:56 Recommend a website where you can download the standard

What about the regulations or system? There is no such thing as 13485.

qwqwqw2088

QWE4562009 posted on 2021-4-26 22:37 What about the regulations or system? There is no such thing as 13485

What standards are needed? You can search

QWE4562009

qwqwqw2088 posted on 2021-4-27 07:50 What standards are needed? You can search for them

I see that many of them don't have them, such as ISO13485, Medical Device Regulation MDR, IES60601, System Document GMP, etc.