Ferrite Core Cable Modem

There s a large am radio station transmitting near you swamping the front end of your modem.

Ferrite core cable modem. Adsl runs at around 30khz to 1 1mhz. The magnetic field is absorbed by the ferrite core and which converts magnetic energy in to heat energy. Here the magnetic flux of the noise current can be reduced with the help of ferrite. I ve 2 of these rj 45 ethernet cables but each cable only has 1 x ferret choke on 1 end of the rj 45 so.

Ferrite cable cores are available at mouser electronics. Depending on the size of your cable the larger inner diameter toroid may be the most effective. Ferrite beads prevent electromagnetic interference emi in two directions. Each time the cable goes through the center of the toroid counts as one turn.

I was starting to see more errors than normal i m currently running from a temporary set up while re fitting my study and since fitting the ferrites i think things have been slightly better. Mouser offers inventory pricing datasheets for ferrite cable cores. Now consider a cable passes through the ferrite core and which carries both noise signal and data signal. A conductive cable acts as an antenna if the device produces radio frequency energy this can be transmitted through the cable which acts as an unintentional radiator in this case the bead is required for regulatory compliance to reduce emi.

I think my speedstream 5242e dsl modem itself was the cause of alot the rfi noise as my cable are pretty short and are all under 3ft. This video just hits a generic use at a high level. Adding extra cores on the cable will only make a difference if you re in a terrible rf area e g. Choosing the wrong type of core will affect its performance too if any.

Use 2 4 ferrite toroid with mix 43 and wind the cable through 7 turns to get an impedance over 1 000 ohms measured data. The magnetic field generates throughout the cable. I moved one ferrite choke core to the ethernet cable and left. Say 1 end is the computer and the other end is the router or say 1 end is the cable modem and the other end is the router which ends of the above gears should i choose to put.

From a device or to a device. Wrapped about 5 or 6 times each in series close to the modem. I move the two ferrite choke cores to the dsl modem power cord.