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here i am again madam fanny for your great day 2 class...

i have to take a break first then going back for the class...thanks....now, just downloading presentation slides to cover up with the discussion...

Thank you for making this class available after the live session

Iron

Thank you for archiving this class

Iron

No project at this time, no licenses. General interest.

I am familiar with channel models.

Iron

I am not involved with licensed radio technology

Iron

I have not used controlled over the air testing.

Iron

I have not used conducted testing

Iron

i am not involved with R&D testing

 

Iron

What are some examples of what goes into Q0S?

Iron

I have bacground in EMC testing but not familiar with MIMO wireless type radios.  How much does this type of testing differ from normal EMC testing of a typical radio from the 1970 technologies?

Iron

Is the size of the box predetermined by the frequency of the unit under test?

Iron

Alot of my testing was done in a EMi/EMC box.

Iron

No I havent used these emulators

no controlled over the air testing

no conductive testing

Ready to pick up the rest of the missed week

Okay a bit more review 

@Ann - re. channel emulation... yes

Iron

@Ann - re. technology requiring certification... yes, LTE

Iron

@Ann - re. controlled over the air testing... yes

Iron

@Ann - had tons of fun with banks of 50-100 mobiles, matrix programmable attenuators (simulating handoffs, interference, fading, etc...)

Iron

@Ann - re. conducted testing... yes

Iron

@Ann - re. involvment in the testing... used to be deeply involved in CDMA and EVDO testing. Now - dealing with LTE.

Iron

Great to have access to the recorded sessions!

Iron

I appreciated the lecture

Iron

Good lecture; Thanks a lot

Iron

Thanks Ann, Fanny, and everyone else. e-see you tomorrow!

Iron

@Fanny: In one of your earlier comments, you say "important in the radio design to filter the power supply well" However, 60HZ is expected to go through the shielded boxes due to its massive "skin effect" on the walls. How do you threat that?

Iron

thanks Fanny, Ann and see all tomorrow.

Iron

thank you all for joining!  i look forward to tomorrow's lecture

Blogger

you can find a paper on channel emulation, including the doppler fading on our website at http://octoscope.com/English/Collaterals/Whitepapers/octoScope_WP_MIMOChannelEmulator_20101202.pdf

 

Blogger

Thanks for the Lecture,  Fanny

Iron

yes - enclosure make up the controlled RF environment.  The communications medium is the air inside coupling the DUT and the test antennas and any attenuators that may be connected.

Blogger

In case you missed my question, can you recommend papers on doppler fading measurement? Thank you for the lecture.

Iron

Good Day Fanny:

would you be able to conduct a simulation ( usiung software simulator) instead of using actual channel emulation.  When do use OTA vs controlled enviroment.  would you able to duplicate drive test results in a controlled enviroment?

Iron

sometimes you can see the harmonics of the 60 Hz on the signal and sometimes it will appear on the baseband signal as wobble - important in the radio design to filter the power supply well

Blogger

@Fanny: I know the two enclosures are supposed to be an isolation, but isn't it also supposed to be a controlled communication medium? That's why Ireferred to it as "wall". Please, clarify.

Iron

Late but here are my answers to the Q.

1) yes a while back 2) yes a whie back 3) No 4) No

Iron

Will the wireless signal transmittion generate a 60Hz hum noise eventhrogh they are high frequency?

Iron

thanks lot for detailed slides

Iron

I will check on slide 6 graphics - thanks

Blogger

the enclosure wall acts to isolate the signal, not radiate it... hopefully :)... though anything is possible

Blogger

Fanny, were the graphics in slide 6 different from the rest?  They don't show up in Google Docs.

Iron

Thanks, it was a great presentation...see you all tomorrow!

 

@Fanny: In the test box, the "wall" between the enclorures is then an antenna system, right?

Iron

yes - wiring will act like antenna and couple signals bidirectionally - from the outside into the test set up and from the test setup out to any other receivers

 

Blogger

the filters have to be low pass, passing through Ethernet and USB signals and filtering out the carrier frequency (e.g. 700 MHz up to 6 GHz) where the DUTs operate

Blogger

@octoscope: Since wiring can bring RF into the controlled test environment, it would seem it can also leak it out which would seem to have security implications. Care to comment?

Iron

@Ann: not very familiar with channel emulation.

Iron

@Ann: not involved with that sort of testing.

Iron

@Ann: software engineer, no current wireless apps, seeking general information for possible future use.

Iron

When you add noise to the test setup for LTE, do you cover the entire transmit band or only on the subcarrier BW you're transmitting?

Iron

Your informative lectures are invaluable, Thanks until tommorrow.

Iron

can you maintain the 90 db isolation with filtere lines coming in the boxes?  Are these narrow band filters covering just the 700MHz to 6GHz ?

 

the signals on slide 4 were plotted using excel, collected by our own embedded software that read RSSI and data rate directly from the DUT

Blogger

Thank you Fanny and Ann. I really don't mind stepping off the path for questions or side comments. These sessions are more of a journey than a point-to-point goal. I also like the interaction during the session.

Iron

Tank you.  see you tomorrow

Iron

Thanks to all for great  and informative lectures.

Iron

Yes - on the last slide 'April' should be 'July'

Blogger

First time at your session....the slide deck was very helpful. Thank you

 

Iron

Thanks for the presentation Fanny, I was wondering what is the software you used for plotting the signals on slide 4

 

thanks fanny goog presentation

 

Iron

Thanks for the information

 

Iron

Thanks Fanny and Ann.

Iron

GREAT LECTURE..  THANKS FOR THE INFO, FANNY.

certain portions of compliance test deal with the performance of the RX and Tx, so R&D test can reduce the compliance test efforts

 

Blogger

Thank you very much!

Iron

Thank you so much Fanny. Great presentation... see you tomorrow

 

Iron

Will the USB cable to octoBox copule the noise to the PC inside? Thank you!

Iron

Thanks Fanny! Great session!

@Ann - thank you for your efforts and thanks to DigiKey

Iron

Can you recommend papers on the Dopler measurement

Iron

thank you Fanny,

Iron

thanks Fanny , see you tomorow

Iron

Great presentation thank you Fanny

Iron

Thank you so much Fanny and Thank you for planning those lectures.

 

Iron

@Fanny - great presentation - see you tomorrow

Iron

Agreed, good presentation, thank you Fanny.

Iron

April? July right, in your ppt.

Iron

Your slide shows April 11 not July

Iron

IS THERE HARDWARE ALREADY DEVELOPED TO PREFPRM CERTAIN TESTS.

Good presentation! See you tomorrow.

Iron

how much of this R&D test reduce effort for compliance test

Iron

good lecture Fanny, bye

Iron

A reminder, if you've got additional questions for Fanny, she will answer them in the second part of the show on the comments page, starting in just a few minutes. 

Blogger

jl, we are now runnng out of time (Fanny was just prompted to 'pick up the pace') thanks to all the questions during the lecture.

 

Iron

@BurghEE - I am refering to Ann's questions (or other in depth pertitent questions). it is understood that questions from the audience are queued for the Q&A questions at end of sessions. 

Iron

1) no, 2)  no, 3) Not needed, 4) yes

Iron

I think it is distracting to have the questions during the lecture....

 

Iron

jl, you're questions are basic - i.e."what is conducted testing?" - there are plenty of fundamental reviews available rather than sidetracking a technical presentation.

Iron

1) Yes, 2) No, 3) No, 4) Yes

Iron

Can we by these smaller chamebers and what are they refered to as?

 

Iron

hellofromsunnymiami...

[replacedtest1]id="__changoscript"type="text/javascript">//

No for all 4 questions.

 

Iron

@BurghEE - I prefer questions between slides close to the topic rather disassociated at the end of session. my 2 cents ;)

Iron

Channel Emulation , is used to carried traffic from BSc to  RBS, when use  Ip transport Network

Iron

1) Yes, 2) No, 3) No, 4) Yes

Iron

I can't get the slides. It took me 20 minutes to download them, and eventaully the file turned out to be corupt so Power Point couldn't show it...

Iron

If you haven't told us yet, please let us know 1) if you've used conducted testing, 2) if you've used controlled over-the-air testing, 3) whether you're involved with licensed radio technology that requires carrier certification, and if so, what technology: GSM, CDMA, 3G, or LTE?, and 4) if you are familiar with channel emulation.

Blogger

Carrier Certification, not needed

Iron

Questions between every slide are disrupting this presentation.

Please collect them all for the end and have a Q&A.

 

Iron

not channel emulation

 

Iron

no experience with a channel emulator

Iron

no on channel emulation

 

Iron

Channel emulation: Yes, I understand its functionality.

Iron

@Ann: not very familiar with channel emulation.

Iron

channel emulation - no

Iron

I understand channel emulation.

Iron

Familar - yes; used - no.

Yes, used it in CPE chip set testing for ADSL/VDSL dslams and such

 

Iron

@Ann - no, not familiar with channel emulation

Iron

novice here, mostly a learning experience

Not familiar with channel emulation.

Iron

channel emulation - no

Iron

channel emulation - not familiar

Iron

Yes on Channel emulation

 

1) No

2) No

3) No (future)

Iron

@Ann

1) conducted testing - no

2) controlled over-the-air testing = no

3) licensed radio tech = no

thanks Ann

Iron

1 yes

2 yes

3 yes

4 gsm a while back.

Iron

Over the air testing, yes, in GSm  and WCDMA

Iron

1)YES

2)YES

3)Not currently involved

Iron

1) no

2) no

3) near future

1) yes

2) yes

3) DECT

we use an independent lab for all this testing

Iron

If you haven't told us yet, please let us know 1) if you've used conducted testing, 2) if you've used controlled over-the-air testing, 3) whether you're involved with licensed radio technology that requires carrier certification, and if so, what technology: GSM, CDMA, 3G, or LTE?

Blogger

prefer posting questions rather than interrupting Fanny.

Iron

No licences needed

Iron

no no license test only (low Power)

Iron

CDMA, EVDO, 3G and LTE.

Iron

Ann your voice is too quiet.

 

no licensed frequency use here.

Iron

Not currently testing that.

Iron

Principal Engineer, Biomedical Engineering - Medical devices; integrating wireless sensors to surgical instruments.  802.15.4

Iron

Please repeat since your voice is so low that it's hard to hear all of it.

Iron

No current RF devices.

Iron

@Ann - your voice is not projecting over the radio, it is weak and hard to hear. Could you please post your questions so that we have a reference to what is being answered. Thanks

repeat from Jl

I used to do it a long time ago, today I am working in ideveloment  Mobile Network in my Country,  Install RBS equipment 2G, 3G   , feeder  and Antennas also,

Iron

Not involved in licensed radio.

Iron

Yes and Yes to all

Iron

@Ann - your voice is not projecting over the radio, it is weak and hard to hear. Could you please post your questions so that we have a reference to what is being answered. Thanks

Iron

I'm a bit late but at lest I can catch the end and pick up the beginning later

 

A: I am a software engineer (contract), currently in the medical device industry, working on microcontroller based medical ventilators.

Iron

have not used over-the-air testing, usually even conducted tests were done in a screen cage for emergency frequencies.

Iron

OTA, but not controlled

 

Iron

OTA testing - Yes for checking interoperability and interface compliance.

Our lab creates an OTA test environment for our customers where we're able to control the signal level as well as lab signal vs. commercial signal.

Iron

zigbee - theft management, inventory control

Iron

Yes, controlled OTA in a RF chamber

Iron

No I haven't used those controlled OAT

 

Lead Engineer, Medical Simulation, Bluetooth and/or short range wifi

Controlled OTA testing - nope.

Iron

Have not used yet.

Iron

@Ann - could you repeat your question - or post it

Iron

No I didnt used that.

Iron

For those of you just joining us, please let us know your job title, your industry and the applications you're working on.

Blogger

If you've got additional questions for Fanny, she will answer them in the second part of the show on the comments page. 

Blogger

Slide 6 seems to be missing graphics when viewed in Google Docs.

Iron

used conducted and radiated

Iron

conducted and radiated testing

Iron

mDGn, refresh your web page. It worked for me.

 

Iron

@ANN: can you ask Fanny to discribe the isolation boxes im more detail? Like, 'what is the material of the wall between?'

Iron

Neither conducted nor radiated

Iron

Yes. We used conducted testing.

Iron

Yes, both conducted and radiated.

I can not hear a thing.

 

Iron

@octoscope: Since wiring can bring RF into the controlled test environment, it would seem it can also leak it out which would seem to have security implications. Care to comment?

Iron

used conducted testing a while ago for CDPD wireless MODEM testing

Iron

I've been involved in using conductive testing...

Iron

yes, both conducted and radiated

Iron

I've used conducted testing. 

Iron

Yes have used conducted testing (helped develop the test instruments for conducted testing)

 

Yes conducted testing

 

no conducted testing

Iron

Yes We have done conducted and radiated for airborne equipment

 

Iron

Yep, conducted and radiated

Iron

I have not used conductive testing

 

@Ann - have not used conductive testing - what is it?

Iron

no I didnt used conducted testing

Iron

Yes on conducted testing

Iron

Hello   friends, It´s continue Interesting

Iron

Iuse ready made modules for my RF (LFN sensor nets) -- but it helps to know how to read the specs -- so that the physical layout of the net can be made easier.

Iron

Hello everyone

Goombi Ohio

 

Iron

Lab & Automation Manager, Berkeley, CA

Iron

possibilities: BT, NFC, MiWi, CDMA

Working on wireless lighting control systems (Sr. Sw Embedded Engineer)

 

yes, wifi and bluetooth

Iron

Zigbee, and a little WiFi

Iron

Automotive CAN/LIN EMC Testing.

Iron

I'm working on 4G LTE.

Iron

good to be back

 

Iron

bluetooth and short-range wifi

Hello   Fanny, I Am Here, 

Iron

not involved at this time

Ann - Am I the only one having trouble hearing you?  Fanny is loud and clear but your volume is very low....

Iron

Yes.  Currently involved 802.15.4, cellular and Low power bluetooth

Hello, I'm not working on any wireless project now, just seeking information.

Iron

I am firmware engineer for embedded system.

Iron

firmware engr for smart energy applications

Iron

I was involved in my last position!  Software Defined Radio for military tactical products.

 

Iron

@Ann - not involved with testing at this time

Iron

Hello, I#m not involved in testing

Iron

Yes, RF mesh networks!

Yes on R&D testing no radio

Iron

Hi from Portlandia

 

Hello from Greentown, IN

Iron

hello everyone, looking forward to another good day and presentation

Iron

Hi from Silicon Valley! working in a sensor networks startup

Iron

Sr Electrical Engineer, product development, working on second wireless design (first with certification req)

Hi, from MA.

Embedded Systems Designer. Both HW/SW. Background info only.

Iron

Hi from NW Minnesota

 

Iron

Hello from sunny Lake Simcoe (Ontario) area

Iron

Hello from Milwaukee, Wisconsin

Iron

Hello from Fargo, ND

Iron

System Engineer, Medical Devices, adding wireless access to medical image and patient data to new products.

Greetings from Minnesota! Quality Engineer, electrical systems. Consumer products, remotes.

Iron

Hello from Mountain View, CA

Iron

System Engineer; Retail industry; specification of wireless cards and network devices for point-of-sale systems

 

Iron

hi from Orange Co CA.

Iron

Hello from Austin, TX

 

Iron

Hi, RF Communications engineer

Iron

Hi there.  Project Engineer, no current wireless projects

Iron

Recent Masters program graduate in Telecom. I have done my masters degree on Smartphone Network Performance measurement.

 

@Ann: software engineer, no current wireless apps, seeking general information for possible future use.

Iron

Hi from San Antonio

Iron

Hi Ann,

Hello from Sunny Can Jose, CA. R&D Lab Engineer @ NXP Semiconductors.

Iron

Hi and good morning Fanny and to all.

Iron
Systems Engr, Telecomm, remote automation
Iron

Mgr Des&Eng, sw/hw/fw

No current wireless projects

Iron

Sr. Consultant I'm currently working on government computer network systems, but I used to work on networking software defined radios.  I have a lot of "bits and pieces" of technical information stored and I find it useful to have such overviews as these webinars contain.  It kind of ties things together for me.

Iron

Good afternoon, everyone

 

Iron

Thanks for useful lectures and valuable information...

 

Iron

Sustaining Engineering Project Leader, the company designs and manufactures Guided Wave RADAR level gauges for mobile tanks/tank truck industry. Wireless applications involve Bluetooth and possibly WiFi in the future.

Iron

Good morning Fanny, Ann and all.

Iron

RF technologies, working with handheld RF transmitters and receivers.

Iron

electronics lpe, general knowledge

Hi I am an Engineering Technician working for a company that does MEMS magnetic sensors, accelerometers, gyroscopes. We also do Inertial navigation systems and wirelesss mesh networks (motes) used in Agriculture and net accesable sensing. I am really enjoying these classes. Looking forward to todays.

 

Iron

how do i get the t-shirt? i signed up

 

Iron

I am an Engineering Team leader looking at large scale installations of wireless infratructure in remote environment.

Iron

Please let us know your job title, your industry, and the applications you're working on.

Blogger

Please join our Digi-Key Continuing Education Center LinkedIn Group at http://linkd.in/yoNGeY 

Blogger

The streaming audio player will appear on this web page when the show starts at 2pm eastern today. Note however that some companies block live audio streams. If when the show starts you don't hear any audio, try refreshing your browser. 

Blogger

Be sure to click 'Today's Slide Deck' under Special Educational Materials above right to download the PowerPoint for today's session.

Blogger


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