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.

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. I moved one ferrite choke core to the ethernet cable and left. 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.

Choosing the wrong type of core will affect its performance too if any. I fitted a couple of ferrites clip on maplin jobs to the power cable to my router not the phone network cable. 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. From a device or to a device.

Adding extra cores on the cable will only make a difference if you re in a terrible rf area e g. The magnetic field generates throughout the cable. 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. Wrapped about 5 or 6 times each in series close to the modem.

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. Each time the cable goes through the center of the toroid counts as one turn. Here the magnetic flux of the noise current can be reduced with the help of ferrite. I move the two ferrite choke cores to the dsl modem power cord.

Mouser offers inventory pricing datasheets for ferrite cable cores. Ferrite beads prevent electromagnetic interference emi in two directions. The magnetic field is absorbed by the ferrite core and which converts magnetic energy in to heat energy. Ferrite cable cores are available at mouser electronics.

I simply slapped a split core ferrite onto the telephone cable near the rj 11 jack going into my dsl modem and another one on the cat5e cable just before the rj 45 jack into the nic and the speed shot up. Modems already have ferrite beads inside. 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.