Hello.
I work in the incubator product(like a smart farm ) development team.
Product development was recently completed and we commissioned a national agency capable of EMC testing.
We have been judged nonconforming several times, and we are currently debugging.
However, there was something I couldn't understand, so I asked this question.
First, the product is composed as follows.
1. 12V 6A Peltier Module (For Control Temperature)
2. Lan Chip (Our product can communicate with the outside with a wired LAN cable. Not WiFi)
3. Main Controller Board (For overall product control)
4. 12V 2A Led Module (For supplying light sources to plants)
5. Touch display (For easy user control)
6. Temperature Senser
7. 12V 10A SMPS Adapter (220VAC 60Hz To 12VDC 10A)
8. The maximum clock for the processor built into the main controller is 80Mhz.
9. The maximum clock for the touch display is 300Mhz.
10. The maximum clock of Lan Chip is 60Mhz.
There is no part that generates more clock than this in our product.
Q1. In the attached EMC test result, electromagnetic waves are leaking even at 400Mhz ~ 1Ghz.
There are no components in our product that generate such high frequencies, how can this result?
Q2. If you have any doubts, how would you recommend taking action?
My goal is to have the dB of all bands down to around 20dB.
I work in the incubator product(like a smart farm ) development team.
Product development was recently completed and we commissioned a national agency capable of EMC testing.
We have been judged nonconforming several times, and we are currently debugging.
However, there was something I couldn't understand, so I asked this question.
First, the product is composed as follows.
1. 12V 6A Peltier Module (For Control Temperature)
2. Lan Chip (Our product can communicate with the outside with a wired LAN cable. Not WiFi)
3. Main Controller Board (For overall product control)
4. 12V 2A Led Module (For supplying light sources to plants)
5. Touch display (For easy user control)
6. Temperature Senser
7. 12V 10A SMPS Adapter (220VAC 60Hz To 12VDC 10A)
8. The maximum clock for the processor built into the main controller is 80Mhz.
9. The maximum clock for the touch display is 300Mhz.
10. The maximum clock of Lan Chip is 60Mhz.
There is no part that generates more clock than this in our product.
Q1. In the attached EMC test result, electromagnetic waves are leaking even at 400Mhz ~ 1Ghz.
There are no components in our product that generate such high frequencies, how can this result?
Q2. If you have any doubts, how would you recommend taking action?
My goal is to have the dB of all bands down to around 20dB.
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