Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [synchronization]

the coordination of events to operate a system in unison.

0
votes
1answer
20 views

How to sync GPS time and pulses of micro-controller

I have two of the devices (a while loop in the code) that need to start at the same time, within 50ms or less of each other. Each is using the same GPS module, and I am using "ARM® Cortex®-M3 Giant ...
3
votes
4answers
774 views

Is there an efficient way for synchronising audio events real-time with LEDs using an MCU?

I'm working on a project in which LED lights synchronise with audio events. I'm not referring to reactive LED projects that read the ADC from audio amplitude or spectrum, but about having some ...
1
vote
1answer
149 views

Video sync generator IC

I have a board which is a PAL CCIR video sync generator card having SAA1043. The IC is accepting external sync signal from pin 15 and generating composite pulse on pin 26 and burst output on pin 1. ...
0
votes
1answer
82 views

Clock synchronised to pulse

I'm thinking about 1Mhz clock signal synchronised to external random pulses (eg. rising edge). Before pulse event clock can be running or stopped. After every pulse, it should run in same fixed phase ...
0
votes
0answers
69 views

High precision timekeeping

Hey I'm looking for suggestions for implementing a very high precision timekeeping device. I need to record independent signals in multiple devices and then time match them to an accuracy of about ...
2
votes
3answers
69 views

Deciding which assembly is more common positive edge detector

I know of two circuits which can act as edge detector: A clock connected as a voltage source across a RC component where resistance is composed of a diode and a resistor and this in series with ...
2
votes
2answers
187 views

How to use 1PPS to Synchronize ESP32 Clocks and Peripherals

I've read a few posts (example) about what the 1PPS signal is and how it can be used at a high-level, but I'm still not sure how to actually implement it on a PCB schematic to sync up with my ...
0
votes
0answers
73 views

How to cascade frequency dividers

I'm implementing some modules using VHDL and for some of them I need the FPGA's global clock signal, and for some others I need to update to two different frequencies. A common solution to this is ...
0
votes
3answers
101 views

Can I use the external trigger to simultaneous capture waveforms on two oscilloscopes?

I want to look at synchronization in a 6 oscillator network (oscillators are about 100 kHz, 1.5 V_pp, if this matters). I have a 4 channel oscilloscope (Tektronix TDS 2024B) and a 2 channel ...
2
votes
3answers
68 views

Clock domain cross and metastablilty problem

I understand the problem of metastability and understand that we can't get a stable value in a bounded time so we need unbonded time but it is not practical, so we put another flip flop with no ...
2
votes
0answers
62 views

Offset QPSK Frame sync markers

What actual protocols exist out there that employ Offset Quadrature Phase-Shift Keying (OQPSK)? What do they use for the frame synchronization marker (or "preamble" or "sync word" or "flag")? Do ...
0
votes
3answers
131 views

Synchronizing two OV7670 image sensors

I would like to create a simple frame synchronihed stereo camera. I found there are cheap OV7670 boards (without FIFO memory) that work with Arduino (or compatible) boards - these sensors do not have ...
3
votes
1answer
105 views

Are Newfoundland's and Quebec's power grid synchronized [closed]

By the Maritime Link project (HVDC), which finished this year, Newfoundland is linked asynchronously to Nova Scotia, which is part of the Eastern Interconnection. But is the power grid of ...
0
votes
1answer
121 views

IEEE 1588 PTP phase and time synchronization

Why everywhere is said that PTP synchronize phase and time together? phase and time are totally separate concepts. does it mean after using PTP rising edge of slave and master clocks happen ...
0
votes
0answers
81 views

How to synchronise DVD-RW spindle motors

Just bought a small DC motor speed controller (two LM324, two IRFZ44N, rated at 250W max output, input in range 5-10 to 30V DC) and started wondering how to synchronise six DVD-RW spindle motors (...
6
votes
3answers
861 views

gps performance for synchronization

I can't understand why GPS reciever clock is very good (stratum 0). I know it's very accurate and pure within itself; but when it passes through a long distance wireless channel, then it has low power ...
0
votes
2answers
55 views

Question about a trigger input of a modern ARB/VSG (Vector Signal Generator)

Given a common setup: The green box is a PCB mainly consisting of a data acquisition device (ADC+RF frontend) which is controlled by a Spartan-6 FPGA. The ADC & FPGA use a clock from a Tektronix ...
0
votes
1answer
194 views

Synchronizing oscilloscope to reference time

Consider a lab that contains an NTP (network time protocol) time server that synchronizes events between multiple workstations connected to the same network. I have a Tektronix DPO4034 oscilloscope ...
5
votes
4answers
2k views

In one-way asynchronous serial communication, how does the receiver sync up its bytes?

I want to make a serial system over RF to receive messages sent from a computer, so I can understand how digital radio works on the bare metal. The one part I don't understand is how a sender and a ...
0
votes
1answer
69 views

Sync with electrical wall outlet [closed]

I have two ac souces one being the electrical wall outlet and the othee being an inverter that will go to zero volts, and both at 60hz. How do I sync the inverter to the wall outlet?
0
votes
0answers
74 views

Busbar frequency when two generator working parallel have little difference in their frequency

2 Synchronous generator supplying a load of 3.5MW at 0.8pf lagging. No load frequency of generator 1 and & 2 are 51.5 Hz and 51Hz respectively. The slope of frequency vs power curve of both ...
0
votes
1answer
210 views

Codec in 'master mode' require more than one external clock? (MCLK?) to drive I2S system timing to/from MCU slave?

Does an audio codec in 'master mode' require more than the one clock line (MCLK?) to drive and time I2S data sync to MCU or FPGA slave? I understand that the I2S proper consists of three lines - '...
1
vote
0answers
33 views

Wireless Time Synchronization IC [duplicate]

In my application I need a clock that is synchronized across several devices. (A detailed description of my system is given in an earlier question) It appears achieving precision timing at a software ...
0
votes
2answers
118 views

Synchronize Clocks

I need to develop a system where there are 4 sensor boxes powered by USB and they have their internal clock. Each of these boxes are connected to a Linux pc and all these PCs are linked with WiFi. API ...
8
votes
2answers
1k views

Why do we need to synchronise asynchronous inputs in FSM?

I have been newly learning digital electronics. I know that there are gates which perform logic functions, I learned about RS-Latch, D-Latch and Master-Slave-D-Flip-Flop. Now that I can perform logic ...
2
votes
1answer
221 views

Simple questions about synchronizer

1) For table 1 of Berkeley paper , why "Input must be valid for at least two clock periods in the new domain." ? The explanation: the width of the input pulse must be greater than the period of ...
1
vote
2answers
117 views

What does Timestamping of GPIO pin means and how to achieve it?

I did my bachelor's in CS and I am pretty new to electronics and with embedded system as my specialization, I am not able to grab some of the concepts. I have made a program which toggles an led on ...
0
votes
1answer
145 views

synchronise many microcontrollers

In my project i'll use modbus protocol for serial communication over RS485. There are more than 320 slaves which seperated equally in 2 groups. Every 16 slaves are powered from the same supply and ...
1
vote
1answer
50 views

Migration from multimode to single mode fiber

In my company we are using custom measurement systems with multimode fiber optic transmitters and receivers for synchronization between different devices. We are thinking of migrating our multimode ...
0
votes
0answers
147 views

Syncronized reset timing (vivado)?

I have reset synchronizer in my top block (attached file). In my project I have blocks which get 125_clk, and others 250_clk. In addition I have srstn_sm block which its output is input for srstn ...
0
votes
2answers
133 views

BTLE synchronize advertising beacons with phone scanning

In a BTLE master/slave connection, the master and slave devices synchronize their frequency hopping. Along with the connection parameters (like interval, slave latency, supervision timeout) this ...
0
votes
1answer
161 views

Radio clock sync circuit identification [closed]

I took out a little board from a radio clock that looks a lot like this one. I believe this is used for automatic clock setting - the coil is probably used as an antenna. It looks like this: The ...
3
votes
3answers
634 views

methods for servo or stepper synchronized multi-axis control [closed]

I have designed a 6 axis robot. The main requirement of the robot is that all axes must be highly synchronized in order to create precise (sub-millimeter, sub-degree) 6DOF (x, y, z, yaw, pitch, roll) ...
1
vote
1answer
52 views

Broadcast Audio Synchronization

Unlike other broadcast standards such as DVB-T where the transmitter sends a reference TimeStamp counter (CTS,PTS) as a global reference clock information to receiver, in digital radio standards such ...
-1
votes
2answers
8k views

What happens when we connect two generators in parallel with a single load? [duplicate]

I read that in large utility systems more and more generators are added to provide extra power. I'm lacking some basic knowledge here. So, what happens when we connect two generators in parallel? Is ...
0
votes
1answer
148 views

Can I use GPS to synchronise two pieces of hardware? [duplicate]

I'm working on a project with multiple sensors. These sensors need to be synchronised with eachother as precisely as possible without a physical connection. I need to make sure that if I tell them to ...
0
votes
1answer
83 views

Maintaing Data Packet Wholeness Over RS-232 Serial Port?

This might seem a bit simple, but when I'm reading data sent from over RS-232 to be read by my computer, is it reasonable to expect that if the data was sent as a single packet, that the packet will ...
2
votes
1answer
291 views

How are two atomic clocks synchronized?

I want to synchronize two atomic clocks at the same location to the same time... then let them run independently of each other (then I'd move them apart). Is there some standard procedure to ...
1
vote
1answer
737 views

Why is the CAN bus always busy (microcontroller)?

I'm trying without success to perform CAN bus communication between an microcontroller and the host (my computer). My question does not depend on the microcontroller, but on the CAN Bus (classic CAN). ...
39
votes
3answers
7k views

How do GPS satellites refresh their clocks

How do GPS satellites keep their on board clocks accurate? I assume that they need to get update from a base station. But how do you make sure that after the update all the satellites are synchronized,...
1
vote
0answers
851 views

how can synchronize two single phase generators?

I need to a continues power supply for 3 day without interrupt. I use from 2 single phase generators that a generator work for 10 hour and next another startup. for uninterrupted power supply we need ...
0
votes
1answer
344 views

Should we use asynchronous inputs in Moore blocks and synchronous in Mealy blocks?

Consider we have two n-bit counters CNT_A and CNT_B two n-bit unsigned comparators CMP_A, CMP_B and two n-bit binary numbers N1, N2. The counters have two inputs C, L for synchronous count and load ...
2
votes
2answers
80 views

Strange voltage decay with clipper

I need to limit the voltage coming out of the sync function on my radio signal generator so I can plug it into my laptop's audio input. This is what it looks like without any voltage limits: I used a ...
1
vote
1answer
548 views

Synchronize internal DAC to I2S on STM32F4

I have a CS4344 DAC connected to my STM32F407 outputting sound at a 44.1kHz rate with DMA and I2S and I would like to output and envelope signal through the internal DAC of the STM32F4, in sync with ...
9
votes
2answers
6k views

How does 2-ff synchronizer ensure proper synchonization?

Using 2-ff synchronizers has been a standard for a signal to cross clock boundaries. And there are lots of paper/figures illustrating the mechanism, such as this one: It seems bclk can only sample ...
0
votes
3answers
915 views

Getting Clock/Time information from PC to an STM32F4

Assume I connect a microcontroller board (like an STM32F4) to a PC via USB. Is there anything in the USB communication protocol that contains host clock data? In other words, can I sync the ...
4
votes
2answers
675 views

Metastability error propagation with flip flop

I do have a confusion regarding the metastability resolution using flip flops , I know that I should add synchronizer of two or three d-flip flop to guarantee a safe transmission at clock domain ...
0
votes
1answer
865 views

How to Sycnhronize STM32F4 Clock with PC Clock

I'm using 3 STM32F401RE to synchronize their clocks. My desired accuracy is of 1ms and even lesser like 0.1ms. This device is connected to PC via USB port. Question 1 : So I would like to know if I ...
3
votes
4answers
1k views

Synchronizing a diesel generator with a pure sine wave inverter

As the title reads, I'm trying to understand the best (Practical) way to synchronize a diesel generator with a pure sine wave inverter, in order to implement an automatic synchronizer based on ...
0
votes
3answers
188 views

How does async data transmission actually work?

I think I understand synchronised data transmission between A and B. They share a synchronised clock signal that indicates when the transmitter is sending a bit and the receiver should read the value. ...