发明名称 |
Line impairment display for digital modems |
摘要 |
A modem receiver used in a QAM or PSK data communication system is provided with various circuits generating error or monitoring signals indicative of the status of the system. These signals and the in-phase and quadrature components of the received signals are fed to an interface circuit which generates display signals suitable for driving a display unit such as an oscilloscope. These display signals define an image composed of the signal constellation of the received signals and various error or monitoring points.
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申请公布号 |
US4639934(A) |
申请公布日期 |
1987.01.27 |
申请号 |
US19850722295 |
申请日期 |
1985.04.11 |
申请人 |
PARADYNE CORPORATION |
发明人 |
ZURANSKI, EDWARD S.;SCOTT, ROBERT E.;BETTS, WILLIAM L. |
分类号 |
H04L1/20;(IPC1-7):H04B3/46 |
主分类号 |
H04L1/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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