L.F./M.F. radio data: compatibility tests
Abstract
Investigations carried out to establish suitable parameters for an angle-modulation system for adding data signals to an m.f. or l.f. sound broadcast programme are described. Mechanisms causing crosstalk between data and sound channels in such a system are discussed and the likely degree of crosstalk is assessed. Suitable parameters for a data-signalling system are suggested, based upon results from a series of subjective tests made in the laboratory and over air.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- August 1982
- Bibcode:
- 1982STIN...8310314L
- Keywords:
-
- Broadcasting;
- Channels (Data Transmission);
- Compatibility;
- Crosstalk;
- Modulation;
- Radio Signals;
- Circuits;
- Low Frequencies;
- Nonlinearity;
- Radio Receivers;
- Radio Transmitters;
- Sky Waves;
- Communications and Radar