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For more infomation >> Balanced lifestyle and near West North Bali national park - Duration: 1:18.

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EMC Interference Suppression with Near-Field Probes & Spectrum Analyzer Software ChipScan-ESA pt1 - Duration: 5:25.

Welcome ladies and gentlemen,

today I would like to show you how to suppress interference

of an electronic device using simple techniques.

For that we use near-field probes of different sizes and

an RF current transformer.

Both can be found in the Emission Development System ESA1.

Additionally, we need a spectrum analyzer

and software

to display, record and compare the measurement results.

Here, we are using the ChipScan-ESA software.

This is the PCB we would like to use for this demo.

We switch the device on.

Here we have a 5 MHz quartz generator,

several ICs, trace systems, switching regulators and other components

with according ground system, trace connections, all battery-powered.

Now we start to get a rough picture of the device

with the near-field probes.

We start by using big near-field probes

to measure the environment of the device

with high sensitivity, but with low resolution.

Later, smaller-sized near-field probes help us to find the exact cause

of the disturbance, such as single traces or IC pins.

Now, we start using the RF-400 magnetic near-field probe,

which is part of Emission Development System ESA1.

Now I am

starting the software and

I am able to transfer the spectrum of the spectrum analyzer.

It´s a live transmission.

We see that, at different spots in the environment of the PCB,

RF occurs, but

we also see the 5 MHz step-size of the frequency

that originates from the quartz generator and

is distributed throughout the trace system.

Measured at different spots, it shows different results.

But typically, we find the 5 MHz steps,

the 5 MHz harmonics.

It is important not to measure directly at the traces,

but outside of the device - at the edge.

At the edge, the whole magnetic field of the module

that causes the interference emissions is captured.

If the probe is place directly on the device, I measure a lot.

But the fields, being effective very close to the device,

do not usually cause interference emission.

These fields are transmitted to the ground system and can be measured at the edge of

or at a distance from the device.

What can be measured from a distance, generally can be found in the far field.

This can be done either with electric or magnetic fields.

The question is, how can I evaluate the success of my interference suppression measures?

I first have to record a state, which is my initial state.

Because if I hold the probe somewhere - here or there, then that is not defined.

I have to measure in a defined state.

Here's what helps:

Assemblies are usually connected to the environment, or something, via a cable

or with construction parts.

I simulate this with a cable.

I plug this into the ground pin and connect the cable to one of the ground pins of the RF bypass (HFA 21).

The ground pins are connected to this ground plane.

I place the RF bypass to ground.

Then the device will transfer a current to the connected cables

and this current generates magnetic fields that flow over larger elements and result in emission.

I can measure the current indirectly using my magnetic-field probe.

I am placing that now on the cable

and we can see my 5 MHz harmonics

through the whole frequency range spanning 0 - 10 GHz.

That's something characteristic, because that results

directly or indirectly (but mostly directly) in the emission.

This depends on how long the cable is. Certain frequency components will go into the far field as well.

Of course I cannot always place my magnetic-field probe here -

I hold it differently every time - which is not a good for comparison.

That´s why, the RF current transformer (HFW 21) has been developed.

It does the same thing as the HFA 21:

Here is a line through.

I do not need to hold the magnetic probe. There's a small current transformer in here,

and that does the same thing I did with the HFA 21 earlier.

I just need to connect it,

to plug the cable into the RF current transformer via the connection terminal

and the other end to the ground,

so that the RF current can flow through

and run off the capacitor (against ground).

This is what I measure with the current transformer.

You will see, it's a similar picture, but one that is very well defined.

This is of course excellent to use for comparisons.

Now I can measure the device and change traces,

filter elements, capacitors or resistors.

And I see the success directly in the transmitted spectrum.

For more infomation >> EMC Interference Suppression with Near-Field Probes & Spectrum Analyzer Software ChipScan-ESA pt1 - Duration: 5:25.

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4000 people who ate at Hardee's near airport at risk for hepatitis A, county says - Duration: 3:36.

4,000 people who ate at Hardee's near Airport at risk for hepatitis

eight-county says an estimated 4,000 people who ate at a Hardee's restaurant

on Little Rock Road in mid-june are at risk of contracting hepatitis A and

should get a vaccination as soon as possible

mecklenburg health director said tuesday mecklenburg health director giblet

harris said a recent five-person outbreak of hepatitis C includes an

employee at the Hardee's near the airport people who ate at the restaurant

including carry out and drive through between June 13 and June 23rd are at

risk Pyrrhus said the county doesn't believe

the person contracted the virus at the restaurant but likely was infected

elsewhere the county worked with the state and federal Centers for Disease

Control and Prevention to identify the five new cases of hepatitis Assistants

June 6 one of those people worked at the Hardee's and had limited contact with

food Cirrus said theorists said the CDC has told the county that the vaccination

must be given within 14 days of exposure to be effective that means people who

ate at the Hardee's on June 13th need to be given a vaccination immediately the

county is holding three vaccination clinics for residents there are clinics

oh and 8 a.m. to 7 p.m. Wednesday and 8 a.m. to 5 p.m. Thursday at the Northwest

Health Department 2845 feed esport Road and at the southeast Health Department

at 249 Billingsley Road there will be a vaccination clinic 3 to 8 p.m. Friday to

the health marshal building 700 entrance treat there also will be a clinic open

at the help marshall building 10 a.m. to 3 p.m. Saturday there have been 10 cases

of hepatitis 8l liver disease since April 20th the CDC describes hepatitis C

as a liver disease caused by the hepatitis A virus and is usually

transmitted through the fecal-oral route or eating or drinking contaminated food

or water symptoms include fatigue low appetite stomach pain nausea and

jaundice those symptoms usually clear two months after a person is infected

the CDC said the county said there are several high risk factors associated

with contracting hepatitis A they include family members caregivers or

people who have had sexual contact with someone who is infected with hepatitis A

men who have sexual intercourse with other men people who use recreational

drugs people who have traveled recently to countries where HIPPA Titus sweat is

prevalent homeless people who aren't able to wash their hands frequently here

is said the county had six cases in all of 2017 this year there were two cases

before April 28 and 10 cases since then hereis said the employee is recovering

and handled food in a limited way she said the employees last day at work was

June 13th with that timeline the county determined to 10-day window for people

who are at receipt commissioners asked Harris whether the Health Department had

the ability to cloak the restaurant she said the county does not and added

that management appeared to be taking the issue seriously the county said it

first learned about the employees condition Monday hereis defended the

county's decision to wait until 3:00 p.m. Tuesday to announce to the public

hereis said the county had to investigate how much contact the

employee had with food before alerting the public

For more infomation >> 4000 people who ate at Hardee's near airport at risk for hepatitis A, county says - Duration: 3:36.

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Growth near Dripping Springs - Duration: 1:54.

For more infomation >> Growth near Dripping Springs - Duration: 1:54.

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Incoming highway commissioner plans to improve roads near West Ridge High School - Duration: 2:47.

For more infomation >> Incoming highway commissioner plans to improve roads near West Ridge High School - Duration: 2:47.

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Grass Fire Destroys 2 Outbuildings Near Parker - Duration: 0:16.

For more infomation >> Grass Fire Destroys 2 Outbuildings Near Parker - Duration: 0:16.

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Hot springs North West Bali - near Pemuteran - Duration: 1:36.

For more infomation >> Hot springs North West Bali - near Pemuteran - Duration: 1:36.

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Officials Look To Improve Traffic Near Site Of New Amazon Warehouse Along Route 130 - Duration: 2:26.

For more infomation >> Officials Look To Improve Traffic Near Site Of New Amazon Warehouse Along Route 130 - Duration: 2:26.

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Officer charged in shooting of black teen near Pittsburgh - Duration: 4:48.

 EAST PITTSBURGH, Pa. –  A white police officer was charged Wednesday with homicide in the shooting of an unarmed black teenager who was hit in the back while fleeing a traffic stop, a death that has fueled daily protests around Pittsburgh

 Prosecutors cited officer Michael Rosfeld's inconsistent statements about whether he saw a gun in the teen's hand

 The East Pittsburgh officer first told investigators that the teen turned his hand toward him when he ran from the car and the officer "saw something dark he perceived as a gun," according to the criminal complaint

 During a second recap of last week's shooting, Rosfeld told investigators he did not see a gun and he was not sure if the teen's arm was pointed at him when he fired at 17-year-old Antwon Rose Jr

 The 30-year-old officer had been sworn in just hours before the June 19 shooting after working at the police department for a couple weeks

He turned himself in and was released on $250,000 bond. He is scheduled to appear in court July 6

 Criminal homicide is a broad category that includes manslaughter and murder. Pennsylvania prosecutors typically specify what subsection of homicide they will pursue later in the case

 Allegheny County District Attorney Stephen Zappala said his office planned to ask a jury to consider the highest charge of first-degree murder

He argued against releasing Rosfeld on bail.  "You do not shoot someone in the back if they are not a threat to you," Zappala said

 The car Rose was in had been stopped on suspicion of involvement in a drive-by shooting

But investigators determined that Rose had had done nothing "except be in the car," he said

 Zappala said witnesses described Rose as showing his hands before the shooting, stressing that he did not have a weapon

 A lawyer representing Rose's family said that relatives had "guarded optimism" about the charge filed against the officer

A funeral for the teen was held Monday.  "The family will settle for nothing less than a conviction and appropriate sentencing," attorney Lee Merritt said

 Rose was shot three times — in the right side of his face, in the elbow and the fatal shot to his back, which struck his lung and heart

 Rosfeld pulled over the car in which Rose was a passenger about 15 minutes after reports of a drive-by shooting in nearby North Braddock

In that attack, a 22-year-old man was shot in the abdomen and was treated and released from the hospital

 A witness described a car from that shooting as matching the one Rose was in. A bystander from a nearby home captured video of a portion of the stop and the shooting

 As Rosfeld took the driver of the car into custody, the passenger doors can be seen opening and Rose and another teen are seen running from the car

The officer then fires three shots.  Rosfeld has been on administrative leave since the shooting

 Two guns were found in the car, and an empty gun magazine was found in Rose's pocket, investigators said

 According to the complaint, the driver of the car, who was operating as an illegal cabbie, said he heard shots from the back of the vehicle, where the second teen was sitting

He said Rose was sitting in the front and did not fire any shots during the earlier shooting

 The charge against Rosfeld comes a day after authorities arrested the second teen

That teen was identified Wednesday as Zaijuan Hester, who was charged with aggravated assault, possession of a firearm by a minor and other offenses in connection with the drive-by attack

 Rosfeld, of suburban Penn Hills, had worked at several other police departments, including the force at the University of Pittsburgh, during the last seven years

 ___  Associated Press Writer Claudia Lauer in Philadelphia contributed to this report