UHF to VHF Converters for CATV (1966)

By Edward Wuermser, Entron Inc.

The general public is showing increased interest in Ultra High Frequency (UHF) TV programs and, therefore, this service must be added to CATV systems. UHF, as transmitted, is at too high a frequency to be compatible with present CATV systems because of the high cable losses (Figure 1) and difficulty in constructing distribution system amplifiers for UHF frequencies. In addition, all present CATV systems would be obsolete, since by present system standards for amplifier spacing, the number of amplifiers required would be increased two and one half times. Also, the viewing audience would be limited since a majority of existing TV sets do not have all-channel capability; i.e., channel 2 through channel 83. Therefore, conversion to the present VHF frequency band is required.

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