Questions tagged [manchester-coding]
The manchester-coding tag has no usage guidance.
27
questions
0
votes
0
answers
88
views
Send differential Manchester encoding over Ethernet
For our feed system we have a process computer and feeding boxes in the stable. They are connected with a two-wire cable. Somebody else in this forum found out that it is differential Manchester ...
0
votes
1
answer
95
views
What is the best way to get a receiver in sync with clock? Manchester encoding
This is my first post here, first off let me know how I go.
I am going to be taking on a new project soon, to design a protocol for communication between two microcontrollers (I understand there is ...
- 3
1
vote
1
answer
51
views
signal types and wire types
I am trying to understand the selection criterion for choosing between a signal types and wire type out of the following:
Signal types:
Gnd reference uni-polar signal
Gnd reference bi-polar signal
...
- 827
1
vote
1
answer
128
views
What kind of serial encoding is this?
I'm involved in some reverse engineering of a device I need to interface with. With what little I know, and being able to capture a single data transmission, I think I've narrowed down the encoding ...
- 21
2
votes
2
answers
622
views
Hardware/software needed to decode Differential Manchester?
I have a differential manchester encoded 0 to 5v data stream at 62500bps. What hardware do I need to get this into something I can work with, ie arduino, pi, etc?
I have searched for chips/eval ...
- 93
-4
votes
2
answers
146
views
How does line encoding relate to bus protocols like SPI, serial, i2C, ethernet etc [closed]
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 ...
- 133
0
votes
1
answer
657
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 ...
- 6,821
0
votes
0
answers
96
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 ...
- 101
4
votes
0
answers
2k
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 ...
- 209
1
vote
1
answer
147
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
1
answer
1k
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 ...
- 421
3
votes
1
answer
1k
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 ...
- 31
0
votes
1
answer
3k
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 ...
- 421
1
vote
4
answers
566
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, ...
- 6,637
0
votes
1
answer
102
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, ...
- 27
2
votes
1
answer
666
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
1
answer
253
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
0
answers
565
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
1
answer
1k
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 ...
- 553
3
votes
2
answers
2k
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 ...
- 4,072
4
votes
2
answers
475
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 ...
- 32.4k
2
votes
2
answers
19k
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 ...
- 123
11
votes
2
answers
10k
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 ...
- 17.8k
0
votes
1
answer
108
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 ...
- 179
7
votes
3
answers
9k
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?
- 980
4
votes
2
answers
10k
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....
- 65
5
votes
6
answers
8k
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 ...
- 51