Accession Number:

AD0261546

Title:

SPECIFICATIONS FOR A COBI DATA TRANSMISSION MODEM

Descriptive Note:

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

Report Date:

1961-08-18

Pagination or Media Count:

47.0

Abstract:

The COBI Data Transmission Modem is a 1200 bitsecond coded phase reversal system. The term COBI is an acronym for Coded Biphase. COBI utilizes a double side-band phase reversal modulation with a carrier centered at 1500 cps. The 1200 bitsecond data are recorded into a 1500 digitsecond data stream. Actual phase modulation is accomplished at a 1500 baud rate. Coding is accomplished by converting every four input data hits into a five-bit character. Each conversion is unique. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE