Digital noise generated from the main board of the facsimile machine is
conducted to the handset cable, sensor signal input cable, and power
supply cable. The noise is then radiated using the cables as antennas.
With a facsimile machine, the main board is not shielded by a case or
similar protection. Therefore, it is important to decrease the noise
level from the board itself.
Since many kinds of cables are connected to the board, an EMI filter is
installed on each cable. |
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