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Re: Ultra longevity
I disagree, Andy.? For precompliance, part selection, and initial design, these products are quite appropriate.? I do pre-compliance as a small consulting business.? Yes, I have the "big boy's" equipment, but when things are close, I really don't need them.? The TINYSA products and the NANOVNAs offer plenty of dynamic range and are accurate enough to make an intelligent judgement when something is approaching the limits published by the regulatory agencies (I'm an EMC/RFI engineer).? Well before these instruments were introduced, I used to recommend the AirSpy products as they have a spectrum analyzer application.? The AirSpy offerings would not break the bank of small companies as the R&S, Agilent/Keysite, Tek, and other commercial higher end offerings would.? If a potential product, part, or whatever, measures close to published limits, these inexpensive instruments are fully capable of raising a red flag.? You don't need the big boy's and expensive instruments for pre-compliance, part selection, and initial design. Dave - W?LEV On Mon, Dec 25, 2023 at 12:01?AM Andrew Harman <Nexus9d9@...> wrote: From my prospective proper design and component testing is where you want the best equipment.? Why base your design with less accurate equipment than the product will be tested with during acceptance testing.? It sounds like a train wreck on the horizon. -- Dave - W?LEV |
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Re: Ultra longevity
The TinySA and Ultra are extremely useful tools for both initial design, part evaluations, and pre-compliance.? However, yes, official testing for agency approval requires "petigreded" equipment. Dave - W?LEV On Sun, Dec 24, 2023 at 10:28?PM Larry McElhiney via <lmcelhiney=[email protected]> wrote:
-- Dave - W?LEV |
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Re: Ultra longevity
RE: Regulatory?Approval?
It has been a long time since I was involved with such testing, but I believe that there is a requirement to list all test equipment used along?with Model,?Serial Number and Calibration Date on the submittal. ?As such, the submission probably would not be approved using ¡°hobbyist¡± gear.
I believe that some folks have and would use the Tiny SA products for pretesting during design process¡ (Calibrations might also?have to be traceable to NIST in the USA.) Larry AC9OX _._,_._,_ |
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Re: Ultra longevity
On Sun, Dec 24, 2023 at 09:17 AM, Andrew Harman wrote:
But Erik I'm surprised you haven't made a clear statement as to commercial application or exclusion.??You are right, If only for Eric's protection. There should be a clear statement that this is a hobbyist product and that the responsibility for professional use is solely on the end user.Otherwise someone may use it for compliance testing and subsequently one of the businesses might end up with a huge liability and tries to get back on Eric. Not that any responsible engineer would ever do that but heck one never knows. John |
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Re: Ultra longevity
QUOTE:?
I dont mind buying new ones as long as they will still be available and supported without going obsolete. This is one of my concerns as well, but not for your reasons.? Both the TinySA's and the NANOVNA's offer at affordable prices highly capable pieces of RF test gear that, in the past, cost several 10's of thousands of dollars (and still do from the big boys).? They are both well engineered and highly useful for their intended purposes.? Considering both the cost and functionality, I only hope and pray that they will continue to be available once the USA and China part ways.? They also offer excellent teaching tools.? So much so that schools and universities can finally afford to buy in somewhat bulk quantities and give them to the interested students to supplement their course work.? Again, I only hope and pray they remain on the market for years to come.? They, collectively, offer far too much capability at an affordable price to let them go by the wayside. Just my 2 cents. Dave - W?LEV ?? On Sun, Dec 24, 2023 at 6:31?AM <skharidehal@...> wrote: Hello, -- Dave - W?LEV |
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Re: Sd Timed saves
Erik, having the possibility to execute the save command (menu 9 6) on a command file (*.CMD) from SDcard, you would only need the wait command to cause a wait before executing it. Perhaps creating the wait [n] (seconds or full scans) command is easier to implement than creating the autosave function in the menu. Just a though.
Merry Christmas. Toni |
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Re: Ultra longevity
Martin,
My wife has worked as a RN for over 35 years.? I have to agree on the safety of life issue - I wouldn't rule out a medical malpractice case dragging the validity of use issue into a deposition process.? Someone will just call in an "Expert Witness" that will render an opinion based on best commercial practices.? ? It can be costly and time consuming whether you are party or non-party to these suites.? ? On a separate note, as technology advances over the next 20 years - how long do you think traditional bluetooth might be around?? ?it may be replaced by the newer Ultra Wideband (I know you're reading this Dave).? I compare it to the likes of earlier spread spectrum.? ?Its now available on cell phones. Regards, Andy |
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Re: Ultra longevity
On Sun, Dec 24, 2023 at 06:31 AM, <skharidehal@...> wrote:
I am trying to measure transmitted power(dBm) from my medical device in a RF enclosure at bluetooth frequency(2.442 GHz) using the ultra. This project will remain active for atleast 20 years and I am wondering what would be the lifetime for tinySA (in years maybe?) if i leave it connected to my PC runnning all the time on manufacturing systems.This rings all sorts of alarm bells with me. The TinySA is fine to assist with training, design verification and to a certain extent pre-compliance testing, but it can not in any way be considered to be a professional grade item of test equipment. Especially when medical or other 'safety of life' equipment is being validated. It is difficult enough to maintain calibration of commercial equipment over a 20 year period, and this usually at considerable expense, so a $150 item (good as it is) is just not up to the task. Regards, Martin |
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Re: Ultra longevity
? ? Geez, this is a very serious matter that needs to be emphasized.? ? There would need to be the initial calibration certification as mentioned.? Additionally there would need to be a determination of calibration interval and scheduled calibrations which are also certified. (Initially for unknown devices this can be as short as 30-90 days). The calibration accessories, open, short and 50ohm load have to be certified both separately and with the device.? I do not believe a Certified Calibration Lab would certify the device - if they would it would take many hours of investigation and research which you would be billed for.
? ? The device accuracy has to be determined at each function and compared against the test accuracy needed for your Acceptance Testing Procedure. Then comes the question on the validity of user calibrations and any calibration corrections that have to be applied to the device.? Any updates to the firmware would invalidate a prior certification.? In the manufacturing environment any such device when found to be out of calibration during the next validation can lead to a product recall and legal battles.?? ? ? I oversaw a various calibration systems as a Quality Assurance Manager. I also had to evaluate vendor facilities. I would do more than just roll my eyes If I saw this on a product line.? IMHO, the Tiny SA should be left to hobbyists and ham operators, it is not what I would consider intended for commercial use.? Privately owned TE is never allowed on a production line and if the facility wants to keep their?quality rating they will get the proper commercial equipment.? I've disqualified vendors and subcontractors for less. ? ? To reinforce this to management, remember that the initial eval and Cal is costly and that subsequent Cals could be upto $1K at a pop, those 90day Cals can add up.? A known commercial instrument may be an annual cal. Figure that over the life of the instrument.? ? ??Corporations use the buzz term Risk Management.? Avoiding a product recall is priceless.??Product recalls can in some instances have a partial financial liability to a test equipment manufacturer.? That's why so many devices do have a legal disclaimer with limitation of liability. ? ? ?Erik did a great job on the design of this device and he continues to provide prompt and superb support.? But Erik I'm surprised you haven't made a clear statement as to commercial application or exclusion.?? Regards, Andy |
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Re: self-test error
Thanks,? I have done as suggested, but I still have the same result. |
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Sd Timed saves
Good afternoon. I am interested in purchasing this measurement equipment. Depending on the weight (<250gr) I can attach it to a UAV and measure radiation diagrams. It would be necessary to save a screenshot to the SD approximately every 2 seconds.
When will this option be available?
Thank you |
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New FW release: Corrected CSV output for IAS import
New FW release
Version V1.4140 Ultra only Changes: - Corrected the CSV output for import into IAS This change reduces the number of digits in the level output and removed a trailing space. Hope now all the main wireless management softwares are happy with the tinySA CSV output -- For more info on the tinySA go to https://tinysa.org/wiki/ |
Larry McElhiney
John Cunliffe W7ZQ
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