发明名称 |
Digital testing apparatus |
摘要 |
Apparatus is disclosed for producing a test signal having a predetermined amount of distortion, including a first pulse generator (11) for producing a plurality of first pulses, a distortion pulse generator (18, 21) for producing a plurality of distortion pulses, and an adder circuit for adding the first and distortion pulses to produce a composite signal having a main portion of amplitude and shape identical to the first pulse and to which is added at least one of the distortion pulses.
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申请公布号 |
US4204228(A) |
申请公布日期 |
1980.05.20 |
申请号 |
US19780904291 |
申请日期 |
1978.05.09 |
申请人 |
INDEPENDENT BROADCASTING AUTHORITY |
发明人 |
HUTT, PETER R;MASON, ARTHUR G |
分类号 |
H04L25/02;H04B17/00;H04L1/24;H04L25/04;H04N7/025;H04N7/03;H04N7/035;H04N7/12;(IPC1-7):H04N5/00;H04N9/62 |
主分类号 |
H04L25/02 |
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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