A prototype design for microprocessor based digital telemetry transmitter for low frequency data
Open-File Report
78-674
By: J. Roger, R. Cutler, and M. Varon
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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 |
|---|---|
| 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. |