Questions tagged [synchronization]

the coordination of events to operate a system in unison.

Filter by
Sorted by
Tagged with
0
votes
1answer
444 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 ...
1
vote
1answer
164 views

How to tell whether a line coding scheme has DC component or not

I'm new to EE, trying to understand things as a non technical audience. My textbook says one of bipolar encoding schemes called alternate mark inversion (AMI) has no DC component and we can think ...
1
vote
0answers
27 views

Confusion in sync-async transmission in RF circuit

I am learning about building an RF transmitter circuit. Now one answer in Answer to DIY RF Transmitter Circuit specified " Very first thing you have to decide on data is whether you want ...
1
vote
2answers
81 views

Wireless Time Synchronization Project

I am part of a team project involving baseball where we would like to determine whether a runner stepped his foot on the base (first base, for example) before or after a fielder (the first baseman) ...
1
vote
1answer
118 views

How to synchronize PIC PWM clocks?

I'm considering a design which has multiple PIC-based controllers producing PWM signals at 31 kHz. Sometimes, under a well-defined "handover" condition, some pair of PWM power feeds will be connected ...
0
votes
1answer
428 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
387 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

Have I understood this solution to the sensor synchronization problem correctly?

I read a research paper which proposes an algorithm to synchronize sensors in a way that is independent of the sensors. Beginning with the simplified version which assumes no drift between the sensor <...
0
votes
2answers
29 views

Synchronizing 2 MCU's ADCs over WiFi

I have 2 devices with analog signals. I want to acquire their signal with 2 MCU's (preferably ARM). fully synchronized with the same sampling frequencies, starting and ending simultaneously user ...
1
vote
1answer
141 views

Create a synchronous network of 400 devices

I have around 400 devices that i want to address in a star topology. Each device controls a set of LED strips (27*12 resolution). The idea is display a video animation in a good frame per second rate (...
0
votes
2answers
46 views

How does Synchronous Transmission provide synchronized clocks? [duplicate]

I was reading a textbook which says: in synchronous transmission, the bit stream is combined into longer “frames,” which may contain multiple bytes. Each byte, however, is introduced onto the ...
2
votes
1answer
35 views

SyncE over wireless?

Doesn't look like "Synchronous Ethernet" exist over wireless like it does on wired. Is there any technical reason for it not existing? On wired, Synchronous Ethernet transfers a 125 MHz master clock ...
0
votes
2answers
86 views

Does NRZ-I have a synchronization problem?

I'm new to EE, just have a question on synchronization. I was reading a book which says: NRZ-I has no problem with sequences of 1s, but has problem with sequences of 0s. It certainly has a ...
0
votes
5answers
92 views

why the sender's clock might not in the same pace with the receiver's clock

I'm new to EE, sorry if my question is dumb. I was reading a text book which says: To correctly interpret the signals received from the sender, the receiver’s bit intervals must correspond exactly to ...
0
votes
0answers
61 views

How to synchronize TI high precision ADC and DAC via SPI?

I am working with DAC80504EVM and ADS8920BEVM-PKD from TI. I am trying to design a system which uses TMDSEVM6657EVM processor board to communicate with these converters via SPI. However, I am trying ...
0
votes
1answer
207 views

Ethernet PHY clock and sync

I have a general question about reference clocks for ethernet PHYs. The PHYs I have seen so far require an external clock source like a xtal or other singleended clock (in addition to the clk lines ...
0
votes
1answer
1k 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 ...
0
votes
0answers
49 views

How does lamp lights up in synchronising unit?

I recently learnt about the synchronisation of alternators using Two bright and one dark lamp method. In this arrangement, lamps are connected between two sources. We done the practical using an ...
0
votes
1answer
216 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 ...
4
votes
4answers
839 views

Need a method for synchronization of galvanically separated microcontrollers

I would like to get some ideas for my problem. I have a HW which has a main processing unit (Beaglebone, host controller) which is connected to four galvanically seperated STM32 microcontrollers. All ...
0
votes
0answers
116 views

stm32 timer synchronization between output compare and timer interrupt

I need to have timer output compare synchronized with timer global interrupt ,they start separately with two lines below HAL_TIM_OC_Start(&htim3,TIM_CHANNEL_2); HAL_TIM_Base_Start_IT(&htim3);...
0
votes
1answer
80 views

Can I connect an inverter supply and AC mains supply in parallel? [closed]

Consider a solar panel is used to charge a battery and the battery supply is fed to an inverter. When the mains AC supply goes off then the backup battery supply kicks in. Suppose I want to reduce my ...
0
votes
1answer
67 views

What's best method to synchronize with main AC voltage?

I'm making an active rectifier, to make it work I need precise information about actual phase of main voltage. What I need: 1) exact moment when the positive section of sine wave starts and ends. ...
5
votes
4answers
3k 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
101 views

Drift auto-corrector for any microcontroller [closed]

I've made multiple microcontroller circuits in the past, but now when I look at everything, drift has become a problem. I know this when I try to connect two micros together serially via wireless ...
0
votes
2answers
131 views

Compensating clock drift “by hand” - what have I solved?

Edit: I'm not actually looking for a solution, because short of syncing the hardware clocks (which I can't do) there isn't one. What I'm looking for is an explanation of where the magic -8.4ms I seem ...
0
votes
0answers
28 views

Generator data for synchronizing

I have two DG sets which are to be synchronized on to the same AC bus and needless to say, they must share load. I have gathered some parametric data which I felt would decide how well these can work ...
1
vote
0answers
43 views

Shift composite image right

The circuit is based on AD725 encoder, and the proto board is functioning relatively well. Here're the pics: NTSC mode: PAL mode: Circuit detects PAL or NTSC mode using MCU, and performs automatic ...
-1
votes
2answers
82 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 ...
4
votes
4answers
814 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 ...
0
votes
1answer
97 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
97 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
107 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
882 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 ...
40
votes
3answers
8k 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,...
0
votes
0answers
183 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 ...
1
vote
3answers
345 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
95 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
101 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
256 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 ...
1
vote
1answer
405 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 ...
3
votes
1answer
137 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 ...
3
votes
4answers
2k 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
0answers
104 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
1k 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
100 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 ...
-1
votes
2answers
12k 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
87 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
3answers
2k 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 ...
0
votes
2answers
149 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 ...