发明名称 |
Digital word generator |
摘要 |
For imitating periodic signals occurring in digital transmission systems during some operating conditions in view of the multiplex structure a word generator is proposed which includes a read-only memory from which during a test signal cycle only 4116 permutations are successively read out of a total of 65,536 possible word sizes and permutations of e.g. a 16-bit word. The remaining 61,420 permutations are generated by shifting bit-by-bit the entire packet of continuous signals so that in case of a fixed 16 bit pattern the packet starts at a different bit position during each successive cycle and after 16 cycles all 16 bit positions occur as begin state. The shift is caused by a framing bit sequence which determines the test signal cycle and whose length is aliquant to n=16.
|
申请公布号 |
US4733395(A) |
申请公布日期 |
1988.03.22 |
申请号 |
US19860852336 |
申请日期 |
1986.04.15 |
申请人 |
WANDEL & GOLTERMANN GMBH & CO. |
发明人 |
GELBRICH, HANS-JOACHIM;LEHMANN, ERWIN |
分类号 |
G01R31/3181;G06F7/58;H04L1/24;(IPC1-7):G01R31/28 |
主分类号 |
G01R31/3181 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|