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Another great session. Lots of interesting content. I just wish the audio was available for download.

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About to be involved with an academic embedded design project.

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HW R&D, medical devices

 

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HW/SW R&D Engineer
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Good morning from San Jose, CA
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Excellent class again

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Thanks Fanny; excellent presentation. Missed two days back

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Firmware Engineer in Medical Devices using wireless comms to sensors with 3G data backend

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Thanks, good session

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Thank you once again.

 

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later

Good lecture!

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Thank you Fanny and Alex

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thank you all for joining and hope to see everyone back tomorrow

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Thank you for the presentation and answers

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we will look at some smaller anechoic chambers for higher frequency measurements tomorrow

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there is gradient abxorber that's thinner and works well

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for higher frequencies, such as 900 MHz and higher you may not need cones

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yes - the cones are made of absorptive foam that kills reflections

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The cones in the testing chamber are for killing reflexions?

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tomorrow we will look at controlled environment test methods

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Typically trying to measure over the air in the open air environment is difficult because there are many sources of signals and interference

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another way may be to look with a spectrum analyzer and see if the spectrum looks like Wi-Fi or frequency hopping BT

 

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to determine the wireless sytem used, you may try a wireless monitor (sniffer) or look inside at the chipsets used.

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Thanks for your time Fanny

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How can we determine what type of wireless system is used in a home appliance (ex. heating sensor communicating wirelessly with a heating device)

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Thanks for the chipset comments!

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Figuring out signal loss vs. terain, you may look into ray-tracing simulation packages.

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We had good luck with TI as a chipset vendor with good support. Silicon Labs is also good.  When it comes to Wi-Fi, Ubiquity is a good vendor, but may be hard to get their attention for low volumes

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thank you fanny very informative

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Thank u all very much. It feels good to be part of this :)

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For ad-hoc networks with mobile nodes - yes - you can lose coverage, so it's important for the network to be able to 'self-heal' and find alternate routs.

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Tyhank you very much. Good presentation.

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Good afternon to every one

New design to transmit RS232 data to multiple slave and master nodes.  Your overview has been moxt helpful. 

Thanks

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Good afternoon, everyone

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Fanny, thank you for today's presentation, very informative.

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 email psalazar@globalmed.com

 

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@Pedro Salazar, North Scottsdale by Princess Dr.

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As Fanny said, go the module route, if low volume. I've been in Enterprise 100k-1M/year radio, and support from all of the "big three" is rough, some off-load support for say $40k & ca. $200/hr. thru third parties.

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Question - In an Ad-Hoc network structure, does the network have potential to loose coverage areas because of individuals moving locations?

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Maybe some mention of chipset focus on consumer wireless (i.e., range vs. throught, and scalingof users/clients) vs. Enterprise/Industrial? Perfect business sense, but essential to be aware of this industry wide dichotomy.

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Chipsets: are there any reccomendatins for vendors that are easy to work with with low volumes. (My experience is that Broadcom is VERY difficult)

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@Pedro Salazar, Yes in Scottsdale

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Lots of general test equipment at work

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No RF test test equipment

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No RF Test Equip yet

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Tektronix MDO4104-6 Mixed Domain Oscilloscope  (1 GHz analog scope & 6 GHz spectrum analyzer)

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for which frequency did you calculate the budget?

 

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Test essentials:

power meters (peak sensor, given complex modulations), one-box tester (combined VSA & VSG, aka LitePoint, Agilent or R & S), VNA (for all detailed RF bard work), Spectrum analyzer, with freq. at least 3x radio band of operation (TX harmonics, spurs, etc.), wideband horn antenna & pre-amp.

Shield/screen rooms/boxes for most RX testing

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are there any good free resources for figuring out signal loss based on terrain considerations??

 

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No ownership of RF measuring tools

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I have Spectrum Analyzer.

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Personally I've got Spectrum Analyzer, Signal Generators, Measuring Receiver (High end sommunications test set), Network Analyzer.

Work only has a Spectrum Analyzer

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Spec an and packet sniffer

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spectrum analyzer and RF generator (agilent)

 

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not much at the moment

 

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Don't have test equipment.

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Essentially "system integration" of radio modules- naive to expect "turn-key anything at 5 GHz ;-) FEM, LNA, switchs, filters & diplexers used to leverage reference design of chipset vendors. Modules lag chipsets by 1-2 years. Certain chipset vendors, i.,e Atheros, put the 5 GHz outside ther chipset/module, so somewhat forced to "roll your own." Difficult to get support form chipset vendors (understandably) if volumes are below ca. 1M/month. Antenna integration/matching, and conducted vs, radiated (OTA) RF performance are constant issues. Also, regulatory compliance is expensive & time-consuming, esp. if lots of countries involved, & 5 GHz much more "scattered" than 2.4 GHz.

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I´m taking this course just to understand the basics of wireless. My plan is to use OTS products

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looking at adding connectivity to devices for an existing std netrwork

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Mostly user, no development for wireless

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Embedded firmware on energy harvesting low power RF (EnOcean Alliance)

Partial turn key with a desire to possibly use alternatives to lower cost.

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Due to (1) price and (2) extreme power sensitivity and (3) size constraints, I am looking at the chipset route.

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No Wireless at this time.

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Very much standards / architecture oriented (TVWS needs standardization to achieve economies of scale) but early in the technology cycle so also lots of tweaking under the covers

 

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using BLE now, change to proprietary

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Combination of both.  Depends on where we are.

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I would be trying to use a Turn-Key setup rather than designing my own.

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Trying to use an establish solution and trying to understand its operation.

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802.14 mesh network for wireless communication with remote sensors

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probably will be designing our own

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we designed a protocol for MICS

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I am doing a propietary implementation

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I´ve used OSC over WiFi and I´m planning to use bluetooth to connect Android with microcontrollers

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HW RF design: 802.11 abgn & BT in a VoWLAN radio & cutom, small, embedded antenna design  for a hand's-free, speech recognition "communications badge" used in health-care, hospitality and oil/gas/mining Enterprise verticals

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CAN and Iso-CAN Transceiver.

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No wireless project right now. Gathering knowledge.

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embedded firmware.  Nothing wireless yet

LMS - Electrical Engineer, short range, high noise - little experience

 

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hardware and software engineers for medical device

 

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Sales of healthcare solutionsthat is dependent on communications

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SW&HW R&D Engineering

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No wireless projects at this time, but hope to play with it in the future.

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No wireless project at this time

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Wireless senor network (based on zigbee) for IoT

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WSN for medical sensors

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Mostly software, some hardware. Very little experience with wireless

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Tektronix applications engineer

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EE, technical translator for Rohde & Schwarz

 

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embedded sw, communications

milenasukovic: Audio has started. It  is woking for me (after reload) on imac with 10.7.5 and safari.

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Embeddes software, drivers

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no audio on my macbook air os x 10.7.5, switched to this while updating my imac to mountain lion os, did the audio lecture start?

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HW/SW R&D Engineering

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@ZA you are in scottsdale too!

 

 

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Hello from Ravensburg,

Mostly hardware with some firmware software.

Greetings from Halland

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Academic embedded design

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Military Systems - System Test

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Electro-mechanical product development

 

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Embedded systems consultant, hardware and software.

Current project is a wireless medical device

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Hello from Vienna

 

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Business Development ... currently focused on TVWS ... rural US and emerging markets overseas

 

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Wireless data monitoring, Renewable Energy

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HW & SW Tinkerer ~ Interactive Art

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HW R&D, medical devices

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Hi - From CA, working on M2M Smart Metering with G3 GSM Module.  isidro

 

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Hardware/software support-development

 

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Warming up in Silicon Valley...

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Good Morning from CA

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An antenna question ... For LE Bluetooth to a cell phone or tablet, with the tablet standing vertically and my device flat (horizontal), what antenna orientation would you recommend?  

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almost there... no sound yet

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Good evening from snowy Munich.

 

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Another Bostonian here!

 

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Good morning everyone, from Scootsdale, AZ

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Good morning from Edmonton, AB

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greetings from sydney

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Greetings from Boston where we have a splendid morning.  jb

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Hi everyone. I missed yesterday´s class but I´m glad it´s still there to play on demand :)

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mornin' all .... from beautiful upstate New York! (Fingerlakes Region)

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Good Morning everyone!

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@somaira u from PAKISTAN?

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@sumaira its 2102 hours 

 

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hye all and good morning !

 

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Hello!

For how long time these lectures are available for listening here?

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Good morning from Scottsdale

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Good Morning from Frosty San Jose, CA.

 It's 34°F now with a High of 65°F.

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Good Morning from GA

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hi can u tell me wats the time of class in PAkistan

 

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