Interference problems associated with proposed expansion of the 27 MHz citizens radio service band. Part 1: Summary
Abstract
There were indications that an additional type of intermodulation (IM) interference of significant severity would occur as a result of a proposed citizens radio service (CRS) band expansion (Docket 20120). Results of laboratory measurements and field tests of this problem are presented. The Chief Engineer was advised that expansion beyond 27.405 MHz could cause certain transceivers now in use to be affected by intermodulation. These models are susceptible to IM resulting from any two signals in the band that are separated by 455 kHz in frequency. Intermodulation of this type can interfere with the reception of the desired channel to which the transceiver is tuned.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- June 1976
- Bibcode:
- 1976STIN...7711271W
- Keywords:
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- Radio Communication;
- Radio Frequency Interference;
- Transmitter Receivers;
- High Frequencies;
- Intermodulation;
- Communications and Radar