Kenosha Reuse Discussion Board > ZION, IL
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> Jps antenna noise reducing
Jps antenna noise reducing
The ANC-4 is an rf device which is designed to provide cancellation of locally generated noise from signals received by a primary antenna. This unit is employed right at the antenna connector of the receiver or transceiver to cancel locally generated noise, such as power line noise, computer noise, TV-generated interference, etc., before it gets into the receiver and affects the receiver AGC circuits. This will allow the reception of signals well below the noise level induced by the local interference.
To cancel locally generated interference, the interference signal must be detected and its phase and magnitude adjusted so that it matches the offending interference, but is 180 degrees out of phase, effectively cancelling the interference. This scheme is particularly effective at reducing local power line noise or other locally generated noise types.
This unit may be used with any receiver or transceiver with rf power output of 250 Warts PEP or less. An rf detector built into the unit automatically bypasses the network whenever transmit rf is detected. The unit is NOT designed to be used at the output of a high power linear power amplifier, but must be installed at the lower rf level of the transceiver, if transmitting is anticipated.
Controls are provided on the front panel to allow adjustment of both the phase and magnitude of the local interference, providing extremely deep cancellation of the offending interference.
