Digital data transmission tests on voice channels /

محفوظ في:
التفاصيل البيبلوغرافية
مؤلفون مشاركون: Urban Sciences, Inc, National Institute of Law Enforcement and Criminal Justice, Law Enforcement Standards Laboratory
التنسيق: وثيقة رسمية كتاب
اللغة:English
منشور في: Washington : NBS : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977.
سلاسل:NBS special publication ; 480-19.
الموضوعات:
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110 2 |a Urban Sciences, Inc. 
245 1 0 |a Digital data transmission tests on voice channels /  |c by Urban Sciences, Inc. ; prepared by Law Enforcement Standards Laboratory, Center for Consumer Product Technology, National Bureau of Standards ; prepared for National Institute of Law Enforcement and Criminal Justice, Law Enforcement Assistance Administration, U.S. Department of Justice. 
260 |a Washington :  |b NBS : for sale by the Supt. of Docs., U.S. Govt. Print. Off.,  |c 1977. 
300 |a v, 59 p. :  |b ill. ;  |c 27 cm. 
490 1 |a NBS special publication ;  |v 480-19 
504 |a Bibliography: p. 23. 
650 0 |a Digital communications. 
650 0 |a Mobile communication systems. 
650 0 |a Radio frequency modulation. 
710 2 |a National Institute of Law Enforcement and Criminal Justice 
710 2 |a Law Enforcement Standards Laboratory 
830 0 |a NBS special publication ;  |v 480-19. 
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