Laboratory tests of a data link modem
Abstract
The performance is evaluated of two minimum shift key modulation modems designed for very high frequency, data link communications. Tests consisted of determining the probable bit error of two modems in a loop-around mode for each modem and then in a back-to-back mode between the two modems. For each of these two test conditions, the modems were subjected to various signal-to-noise (S/N) ratios at the data rates of 2400 and 4800 bits/second. Each test was terminated after 800 bit errors were accumulated, except for those test runs where the modem was running essentially error free, the test period was limited to a 24-hour period. Results indicated that the performance of each modem was the same over the S/N ratios used, within a + or - 1-dB S/N tolerance.
- Publication:
-
Final Report
- Pub Date:
- September 1975
- Bibcode:
- 1975nafe.reptR....B
- Keywords:
-
- Data Links;
- Modems;
- Very High Frequencies;
- Error Analysis;
- Frequency Shift;
- Performance Tests;
- Signal To Noise Ratios;
- Communications and Radar