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CABLE TV/Satellite RFI Coax Noise Filter, Suppresses 1-60 MHz common mode interferenceProduct DetailsMPN: CMNF-TVCountry/Region of Manufacture: United StatesFilter Power Rating (PEP watts): receiver onlyChoking Impedance (ohms): 1000 - 7000Common Mode Attenuation (db): 21 - 36 dbRFI Suppression Range (MHz): 200 KHz-30 MHzInsertion Loss (db): .02# Ferrite Filters: 3Enclosure Size (inches): 4" x 2" x 1.5"Typical Use:: Noise filter at radio end of coax next to receiverCABLE TV/Satellite RFI Noise Filter for AM broadcast & shortwave from 1-60 MHz – Receive Only - F connector I/O - 75 ohm input/output, will pass DC straight thru
Purpose. The CMNF-TV is used to suppress RFI noise and common mode interference on the coaxial input line of satellite and cable TV receivers often caused by nearby transmitters
The filter is designed to have a high RF impedance to noise and interference from common mode currents on the outside of the coax braid while passing RF signal currents on the center conductor and inside of the coax braid to the antenna.
The effectiveness of the filter is dependent upon the amount of common mode noise encountered on the feed line. If your receive system has a large amount of common mode noise current then you should experience a reduction of common mode current which usually as heard as background noise level. Typical choking impedance is shown in the gallery picture.
Got Common Mode Noise? Not Sure - Find out now by clicking link below:
Palomar Engineers Common Mode Noise on Coax User Diagnosis Test
The filter was quite effective. Was surprised that it actually reduced the noise level
more than the signal so S+N/N improved by 1.9 S units.
Bill
Tutorials
CABLE TV/Satellite RFI Noise Filter for AM broadcast & shortwave from 1-60 MHz – Receive Only - F connector I/O - 75 ohm input/output, will pass DC straight thru
Purpose. The CMNF-TV is used to suppress RFI noise and common mode interference on the coaxial input line of satellite and cable TV receivers often caused by nearby transmitters
The filter is designed to have a high RF impedance to noise and interference from common mode currents on the outside of the coax braid while passing RF signal currents on the center conductor and inside of the coax braid to the antenna.
The effectiveness of the filter is dependent upon the amount of common mode noise encountered on the feed line. If your receive system has a large amount of common mode noise current then you should experience a reduction of common mode current which usually as heard as background noise level. Typical choking impedance is shown in the gallery picture.
Got Common Mode Noise? Not Sure - Find out now by clicking link below:
The filter was quite effective. Was surprised that it actually reduced the noise level more than the signal so S+N/N improved by 1.9 S units. Bill
