Title:
DIGITAL CONVERSION MULTIPLEX DEVICE
Document Type and Number:
Japanese Patent JPS54156411
Kind Code:
A
Abstract:
To supervise the operation of an arithmetic unit of a digital transmultiplexer intended to convert a TDM-signal into a FDM-signal and vice versa, a pilot signal is utilized as the test signal which pilot signal is also used to control the level of the received FDM-signals and is processed in the transmultiplexer. The pilot signal selection filter used for controlling the level is used, also in time-division multiplex, for selecting a component having a frequency equal to the pilot signal frequency and occurring in each of the two input and output signals of the arithmetic unit.
Inventors:
JIYORUJIYU BONERO
PATORISU ZEN
MISHIERU KUUDORUUSU
PATORISU ZEN
MISHIERU KUUDORUUSU
Application Number:
JP6570079A
Publication Date:
December 10, 1979
Filing Date:
May 29, 1979
Export Citation:
Assignee:
TRT TELECOM RADIO ELECTR
International Classes:
H04J1/00; H04J1/05; H04J1/16; H04J3/00; H04J4/00; (IPC1-7): H04J1/00; H04J3/00