A prototype design for microprocessor based digital telemetry transmitter for low frequency data
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Abstract
A prototype microprocessor based digital transmitter with low power requirements has been designed and built for use in dial-up telemetry applications. The processor used is the 8 bit RCA COSMAC. Input data is an analog signal in the range of -5 volts to +5 volts which is digitized to 12-bit precision. The transmitted data is a serialized and encoded frequency-shift-keyed signal suitable for transmission over phone lines or radio. Over 500 16-bit words can be stored in the data buffer for transmission with expansion up to 8k words possible. Average power consumption is less than 100 ma at 5 volts.
Publication type | Report |
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Publication Subtype | USGS Numbered Series |
Title | A prototype design for microprocessor based digital telemetry transmitter for low frequency data |
Series title | Open-File Report |
Series number | 78-674 |
DOI | 10.3133/ofr78674 |
Year Published | 1978 |
Language | English |
Publisher | U.S. Geological Survey |
Description | 20 p. |
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