Two wire F.D. multiplex system
First Claim
1. A two-wire frequency division multiplex system comprising first and second kinds of multiplex stations connected by two-wire lines, and distinguished by means to both produce and to receive a predetermined one of two different predetermined frequency basebands each of which consists of predetermined frequencies for dividing the multiplex channels, said first kind of multiplex stations including transmit means having conversion means to convert their own basebands to the different basebands of the second kind of multiplex stations and vice-versa.
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Accused Products
Abstract
A system comprises two kinds of multiplex stations connected by two wire lines and distinguished by two different predetermined frequency basebands each of which consists of predetermined frequencies for dividing the multiplex channels. The multiplex stations are provided with conversion means in their respective transmit paths so as to convert their own basebands to the different ones of the other multiplex stations connected and vice-versa. The system preferably provides generalized units in both kinds of multiplex stations and is simpler than a known one which uses the same basebands in all multiplex stations and converts the baseband before and after transmitting.
28 Citations
8 Claims
- 1. A two-wire frequency division multiplex system comprising first and second kinds of multiplex stations connected by two-wire lines, and distinguished by means to both produce and to receive a predetermined one of two different predetermined frequency basebands each of which consists of predetermined frequencies for dividing the multiplex channels, said first kind of multiplex stations including transmit means having conversion means to convert their own basebands to the different basebands of the second kind of multiplex stations and vice-versa.
Specification