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Electrical Engineering

Questions tagged [manchester-coding]

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22 questions
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-5
votes
2answers
38 views

How does line encoding relate to bus protocols like SPI, serial, i2C, ethernet etc [on hold]

I'm referring to line codes like bipolar, machester, miller etc... https://en.m.wikipedia.org/wiki/Line_code How do these line codes relate to bus protocols? Is it another level down? Is it ...
0
votes
1answer
46 views

Distinguishing simple FSK and Manchester coding?

I'm examining the signal sent by my car's fob. Using an RTL-STR and GNU Radio Companion, I've been able to capture and demodulate the signal. Now I'm working on decoding the signal. What I'm not ...
0
votes
0answers
70 views

Manchster Decoding when symbol are misaligned

Have this problem: I can manually easily decode this using Manchester: It will be 01010100001 etc However how should I decode this: It should be a start sequence code. However on the first ...
4
votes
0answers
597 views

How to analyze/decode a Manchester encoding? [closed]

I have a barcode scanner working on 433Mhz (FSK). Since this is a relatively old product and the PC software is not working with Windows 10's and I can't use the SDK anymore. I, therefore, have ...
1
vote
1answer
53 views

Can sending correct data via UART qualify as valid manchester encoding?

I'm currently in the process of having a laser beam detected by the phototransistor. While the parts in themselves work, I want to detect when the beam has been detected. I understand that a 38Khz ...
0
votes
1answer
406 views

DALI Protocol: Is it valid to include this for manchester decoding convenience?

Understanding: DALI uses Async data decoding using 1 start bit and 2 stop bits. The 1 start bit is logical one (1), also encoded during Manchester encoding and the 2 stop bits(Signal is HIGH for long ...
3
votes
1answer
457 views

Decoding waveform from RFID 125 khz reader

I've recently bought a chinese reader for EM4100 and compatible cards: it has an USB to UART converter to get commands from the software and an STM8S10 MCU responsible for the RFID comunication. I ...
0
votes
1answer
1k views

STM32: Manchester coding bit banging implementation problem

I want to use Manchester Coding for my DALI Master-slave project. I am using two boards for this project, one is STM32E407 and the other is STM32F3Discovery. As an initial step, I want to test for ...
1
vote
4answers
343 views

Self-clocking driver / transceiver

I'm looking for a way to transmit a clock signal and data over a single line, perhaps using a self-clocking signal such as Manchester coding. The design I'm working on has a number of chained units, ...
0
votes
1answer
80 views

How to represent binary for differential and Menchester coding?

I have some questions with solution provided from random material, but I can't understand well. Question 1: I tried to represent binary for each block according to description in the picture above, ...
2
votes
1answer
499 views

how to design an electronic circuit that convert a binary sequence to Manchester code

I want to design an electronic circuit that convert a binary signal to Manchester code. I have already put a XOR operator between the binary signal and the clock, I ...
0
votes
1answer
159 views

Incorrect Manchester encoding from PIC microcontroller

I have written a C program for the PIC18F4620. My PIC works as an encoder, which encodes a data stream in Manchester code. My output is rd7, where it should appear the Manchester code, but only ...
1
vote
0answers
469 views

Receiving and decoding Manchester code X10

Solved: After much debugging I found out that it was the UART that was not working correctly (not sure why yet) and that port I used to turn on LEDs did not work (PORTC). So there were never any ...
1
vote
1answer
494 views

Quick digital receiver for Manchester encoded data?

I want to implement a digital Manchester encoded data receiver. The application is not dissimilar to the KeeLoq system. That is, there is no time for long link training - I want the receiver to ...
3
votes
2answers
1k views

Low cost UART over fibre

I need to extend an existing 5V UART over fibre for isolation reasons. Digital isolators / optos are no good as I need more isolation than that (0.1pF coupling max. from one side to the other). UART ...
4
votes
2answers
411 views

Why does timing change in dataframe using Manchester encoding

I have successfully received a couple data frames from an RF transmitter. I compared couple consecutive frames and the timing deviation between them is marginal, so I am convinced it is reasonably ...
1
vote
2answers
11k views

Differential Manchester Encoding

I am trying to understand Differential Manchester Encoding. The way I understand it is that the representation depends on the previous bit. If the previous bit was 0 there is a transition, but if it ...
9
votes
2answers
7k views

Effects of impedance matching between 50 and 75 Ohm coaxial cables for 10 Mbit/s, Manchester-coded signals (20 MHz)

TL,DR: This is quite a bunch of text because I have included plenty of background info. However, there will finally be a good, and precise question: Should I use an impedance matching network when ...
0
votes
1answer
100 views

ISM RF link problem

I've established an RF link using TWS-CS-2 as a transmitter and AM-HRR3-433 as a receiver. The carrier frequency : 433.92MHz. Modulation type : ASK. ATtiny25 to generate and decode Manchester ...
6
votes
2answers
6k views

What is the advantage of differential Manchester

I can see the advantage of Manchester code over NRZ: you get clock and data in one signal combined. But what does differential Manchester add to that?
4
votes
2answers
9k views

Manchester Decoding

Is a Phase Locked Loop compulsory for decoding Manchester encoded data? Is the PLL used so that Manchester encoding supports different data rates? useful links: http://www....
5
votes
6answers
7k views

Manchester encoding

As I understand, in Manchester coding known bits are sent before start a transferring. But I didn't understand why - One of the main benefits of Manchester, is the fact that sync between the two side ...