MTI 7.6D Pulse Modulation Techniques with UniTr@in-I
System description
In industry as well as in the telephone sector, digital methods of trans-mitting data play a significant role in telecommunications due to the faster rates of transmission that are possible and the high quality of transmission. The LN training system for this subject, is based on the modular, UNI-TRAIN® training system. The PCM card incorporates two synchro-nous sinewave generators with frequencies of 500 and 1000 Hz, that can be connected to the PCM circuit. Alternatively, an external sig-nal can be applied. The PCM modulator/demodulator card has two channels for simultaneous transmission of two signals. The inter-mediate stages of modulation and demodulation incorporate 2mm sockets for displaying the signals on an oscilloscope. LED's are al-so included on the PCB for indicating the data word. A line encoder/decoder is available on the PCB for transmission in the baseband; coding methods AMI, HDB3 and modified AMI, are available. The PCB also incorporates framing, which is based on the principle used on the ISDN S0 interface. As an extension to the exercise package dealing with pulse modu-lation, further methods of modulation for the transmission of data are examined, such as pulse width modulation PWM and pulse position modulation (PPM). Darstellung des Impulsrahmens Darstellung der Codierung und der verschiedenen Signalverläufe Signal- und Taktrückgewinnung, Darstellung des Phasenjitters
Darstellung des kompletten Rahmens der ISDN-Schicht 1 unter Verwendung des modifizierten AMI-Codes
You will find more information about UniTrain-I system on the UniTrain-I web pages.
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