Exchange of information between devices. Communication can be wired or wireless.

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7 views

Why are JESD lanes limited to low numbers through FMC connectors?

On a high speed ADC card I was looking at, the connector used was the HPC variety of the Vita 57 FMC. The reason given for using HPC over LPC is that for a 8 lane link an LPC cannot support that many ...
0
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1answer
22 views

PIC16F1619 curiosity- UART communication

I am using the PIC16F1619 microcontroller within the curiosity board, MPLAB IDE x and XC8 compiler. I am currently trying to get my board to read an analog value and then to transmit this value ...
2
votes
1answer
59 views

Look up tables for 8 digit display

My project on STM32f407-Discovery. I will send a message on terminal to my board and I use this message for showing an 8-digit display. I am trying to build a look up table for the 8 digit Display. I ...
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0answers
30 views

Calculation of signal to noise ratio

Can u please help me answer the following question? An analogue TV signal is sampled at 450x500 pixels and each pixel is digitised at 32 levels of intensity. Picture frames move at a rate of 30 ...
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0answers
58 views

Can I guess 5/3-wire RS-232 pins from voltages?

Objective: interface to an HPLC pump via the RS-232 interface described in the manual. Communication protocol is well described. Pinout is not described at all. Can I guess the pinout based on ...
1
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1answer
36 views

Alternatives to RFID - RUBEE

Since RFID tag reading has poor performance in adverse weather conditions, I've received advice to use RUBEE. But I could not find it being implemented, nor available on a consumer scale. i.e., RFID ...
0
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1answer
35 views

Tool chain for proprietary communication protocol [on hold]

I (the company rather) have a protocol implementation which uses the CAN hardware (CAN Transceiver). The protocol itself is not a standard CAN protocol stack. Is it possible to use any of the off the ...
1
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2answers
74 views

C code for Xbee communication

I am using the following code to communicate with another arduino connected to an Xbee: ...
2
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0answers
22 views

How to pick a Balun and transformer for this power line measurement circuit

I was reading this paper here about measuring power line impedance using a network analyzer. It has a little circuit that they used but of course they're not nice enough to include a BOM :) How ...
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0answers
50 views

Derivative of a triangular wave

Can anyone please help me show how a periodic triangular wave of period 1ms with m(t)max = 1V = -m(t)min has a derivative m'(t) as a square wave with max and min values as +4000 and -4000
1
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1answer
60 views

Physical wiring architecture for a CAN Bus

I want to wire a CAN bus for multiple motors(BLDC) in robotic arm. I am building out my motor such that they have a controller and a CAN transciever built in. There will be upto 6 motors with the ...
0
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0answers
21 views

Channel Capacity Clarity needed

1) Suppose a Noiseless Binary Channel, who's input is reproduced exactly at the output. Let X be the transmitter and Y the receiver (i.e (X=0----->Y=0 and X=1-----> Y= 1)) I understand intuitively ...
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1answer
33 views

Which RF comms solution allows unidirectional short distance low data rate, low latency communication to the largest amount of receivers?

I'm interested in delivering 3 bytes to a bunch of recipients roughly every 50ms with a single transmitter. The data sent is unique to each recipient. I am curious which existing wireless comms ...
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2answers
118 views

Can a smartphone send directly a message to another smartphone 20 miles away? [duplicate]

According to this website, a typical cellphone has enough power to reach a cell tower up to 45 miles away So, can a smartphone send directly a message to another smartphone 20 miles away?
-4
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1answer
61 views

Why do smartphones need towers to send messages? [duplicate]

Why do smartphones need towers to send messages? Why can't they send messages directly to each other?
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0answers
40 views

Is Quad SPI the same thing as SQI?

Simple question (hopefully): Is QSPI the same thing as SQI ? FYI: I saw this topic What is dual/quad I/O? but I am still not sure, however I would rather say it is the same. EDIT: In particular I ...
3
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2answers
127 views

A visible light communication question concerning a preamble sequence

I have a question about preamble and preamble breaker. I am implementing a simple visible light communication using arduino. I have used a Manchester encoding scheme. While I have understood that a ...
1
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0answers
87 views

How to network hundreds of sensors over a serial connection?

So I'm looking for a way to connect hundreds (300-400) sensors (like an accelerometer) together over a serial connection to a micro-controller. The sensors would transmit about 500kbps each. I've ...
1
vote
1answer
39 views

Channel-Loss and Channel-Insertion-Loss

Read many time about Channel-Loss and Channel-Insertion-Loss, but confused that, is that same thing or opposite? Which has +ve or -ve values in dB? In reference to equalization of USB3.1.
3
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2answers
201 views

Controller area network received message filtering mechanism

I am working on some CAN communication project which allows us to control some external device attached to one node from some other node. The CAN bus is a broadcast network and hence a message sent by ...
0
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0answers
10 views

Effect of bandwidth change on Figure-of-merit in DSB-SC

I want to ask about Figure-of-merit in DSB-SC. I know that Figure-of-merit on DSB-SC is SNR of input divided by SNR of output, which is for DSB-SC by default is 1. So, I got a problem from my class. ...
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2answers
45 views

Connection to ground for a Cat5e Shielded outdoor rated cable

My ISP installed the cable modem in my entertainment room. I am trying to have internet also in my STUDIO with an access point to broadcast a second WIFI from there to other parts of the house. (My ...
1
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2answers
126 views

LC circuit in radio receiver

Why is it required in radio receiver to tune the LC circuit to the the resonant frequency of the station in order to receive the station ? How this tuning filters the desired signal from the other ...
0
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0answers
30 views

Sim900A Breakout board is not working

I'm using sim900A breakout board. It has UART interface with it.I'm trying to interface with PC. Module has 8 pins. Vcc,DTR,TX,RX,MIC+,MIC-,Speaker+,Speaker-,GND pins respectively. Here I have two ...
0
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1answer
50 views

Radio data transfer too slow [closed]

I need to send data from a camera recorder to a pc. The camera is about 1024/1000 pixels with 15 fps. Now the transmission distance should be at least 100 meters so I'm trying to use radio, but i ...
2
votes
3answers
96 views

How does the maximum transmission rate depend on the carrier frequency?

This question refers to the following excerpt from Computer Networks by Andrew Tanenbaum: The amount of information that an electromagnetic wave can carry is related to its bandwidth. With current ...
0
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1answer
27 views

Actual procedure used to establish a MW link budget in telecom?

If it possible can someone share with me the actual procedure used (Not the theoretical steps in book !) like in Huawei or others telecom vendor to establish a Microwave Link between to sites Like ...
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3answers
89 views

What do I need to transfer data from device A to device B? [closed]

Disclaimer: I have no experience or knowledge at this topic. I ask this only from curiosity. I want to build two devices. Device A should send data to device B. Device B should display the received ...
0
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0answers
42 views

Interfacing a TM4C123 with a Basys3?

I'm trying to build a shell-based real-time OS on a TM4C123 LAUNCHPAD. I already have the kernel and file system done, and I was hoping to add interactivity to this implementation. I was hoping to ...
0
votes
1answer
53 views

XY graph modulating/demodulated signals in FM

I am using Labview to simulate a communication channel using FM modulation/demodulation (with MT Modulate FM VI and MT Demodulate FM VI to be more precise). I made a XY-plot (see below) showing the ...
0
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3answers
83 views

Electromagnetic Radiation and Communication! [closed]

I read that the accelerated charges create electromagnetic field/spectrum which consists of following different waves: gamma X-rays ultraviolet visible light infrared microwaves radio waves gamma,...
0
votes
1answer
60 views

On the Channel capacity

If we are told that the instantaneous SNR at a specific frequency \$f\$ is \$\gamma\$ (We do NOT assume that the channel is AWGN but we are only interested in the capacity in bit/s/Hz at this ...
0
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1answer
72 views

Connection between MDB Peripheral and Arduino

I'm working on making a custom vending machine controller using an Arduino as the master. The bill acceptor I'm using implements the MDB communication protocal, which is (I think) a variant of RS-485. ...
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0answers
123 views

Wired MBus Design - Circuit and Communication

Been working putting a wired Mbus circuit for a while now for both the master and the slave. For the slave, I am using the ON Semi NCN5150 Slave Chip and built the circuit just as the development ...
-1
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1answer
35 views

Converted from ms per int to Hertz [closed]

I am trying to convert from ms per int to Hertz. I have found that my system takes 0.2313ms to transfer one 32 bit interger. Based on this answer Difference between Hz and bps I have divided my ...
-3
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2answers
99 views

Is it possible to transmitting video signal on 433MHz? [closed]

A video of 2MP or lesser at a distance of 2-3Km. Is it possible to transmit it on 433MHz ISM band?
1
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1answer
70 views

Problems reading GPIO states set between STM32F Discovery and Nucleo64 boards

I am currently having an issue setting up a communication protocol between an STM32F discovery board (using the latest HAL drivers) and a Nucleo64 board (using the same drivers). Essentially each ...
1
vote
1answer
52 views

Large range input single level shifter

I have an application where I will be taking serial signals will need to level shift the signal to 3.3V. The input signal will be from 15 to 5V for a high input and I need them all shifted down to 3....
2
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0answers
52 views

Understanding Phone Service from Cable Companies [closed]

Since communication technology is considered part of EE, I thought I would pose this question here - hopefully it is on-topic. Cable companies like Comcast have been offering home phone service for ...
-4
votes
1answer
115 views

Cheap fiber communication [closed]

Is there a cheap fiber optic communication solution? I mean, whithbtarget price around $1 for one side. I don't care about bandwidth, just want it optical.
0
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1answer
17 views

Controlling initial phase of carrier during modulation?

During the process of modulation, any of the three parameters, viz \$\ A_c\$ , \$ω_c\$ and φ, of the carrier wave can be controlled by the message signal where φ is the initial phase. How is it ...
4
votes
1answer
348 views

RS-232 for approx 1600ft

I am using a cable of approx 1600ft to enable communication between two computers using RS-232(pins 2,3 and 5). On checking the transmitted signal on the oscilloscope, i get the output as below (hex ...
0
votes
1answer
75 views

10Mbs USB to serial communication

I want to transfer data from a full duplex serial device (TTL) to the PC. The data rate is 10Mbs , i am investigating potential solution. I can add a level converter like max232. I have 2 questions: ...
1
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2answers
32 views

Scheduling: Is is a Physical layer functionality or a Data(MAC) layer functionality or is it both?

Fellas, When we use the term SCHEDULING in wired/wireless communication, does it relate to a physical layer functionality or a Data (MAC) layer functionality or to both?
0
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0answers
47 views

RS232 Termination Resistor for MAX202IPW Application

Should I terminate the Rx and Tx lines for RS232 Transmiter MAX202IPW or there is already a built-in termination? What termination resistor should I pick, and how it should be connected. In the ...
4
votes
2answers
558 views

UART synchronization [duplicate]

I am trying to understand UART synchronization. In a UART, the default state is high, and it starts the reception process when it receives a start bit (high-to-low transition) In some scenarios any ...
0
votes
3answers
209 views

Operation of LC circuit in Frequency Modulation with simulation and linking it to the basic principle of frequency modulation [duplicate]

Can somebody help how message signal (words spoken near microphone) is modulated using LC circuit and how lc circuit oscillates at particular frequency by applying dc voltage. In the below circuit l1 ...
0
votes
1answer
51 views

Whats happenning with my logic levels?

I'm using a 3.3 MCU and a 5v logic RS-485 IC. I'm trying to send out some data to another controller. I don't have a logic level shifter as of now. So I decided to use resistor divider, to get it to a ...
-1
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1answer
62 views

Finding the repetition rate of output pulse [closed]

I have finals coming up next week and I failed to solve this following problem, any help will be appreciated. An automatic translator, with a capacity of \$10^3 \frac{bits}{sec}\$ converts ...
1
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2answers
58 views

I2C bus multiplexing issue

I am seeing an unexpected side effect, and could use some pointers. I am working on a project which uses five TCS34725 color sensors. These sensors are being interfaced via I2C on a TI F28069M DSP ...