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I want to measure the frequency spread of a single pulse arising from capacitor discharge into a coil, but it sounds like from the discussion here on measuring radar pulses that this will not be feasible with TinySA. The sweep rate is too slow (?) I can guess what the fundamental frequency ought to be based on the LC formula and fish around that area in zero span mode (?), but I'd really like to see what kind of harmonics are contained in the pulse and what their relative amplitudes are compared to the fundamental. Any ideas besides having to spend thousands more on another spectrum analyzer?

?Hi Erik, I am running the tinysa-app on windows, everything runs well, but starting the continuous scan in the app, on my tinysa I see the ?red paused“ info in the infobar. What does it mean? The tinysa runs continuously without pause! Have you an idea? Best regards Hartmut Dr. Hartmut Brand Aichtal www.hartmutbrand.de Von meinem iPhone gesendet

I've added a page to the wiki describing some steps for manual fault finding. Could some of the users that have (had) problems with their HW have a look at this page and check if it helps them locating the probable faulty component(s) https://tinysa.org/wiki/pmwiki.php?n=TinySA4.FaultFinding -- Designer of the tinySA For more info go to https://tinysa.org/wiki

I would be thankful for any advice on how to connect my TinySA Ultra to the amplifiers I am trying to repair. Currently working on Magnavox Chassis # R204 Using a RF Signal Generator is relatively new to me so am having trouble understanding how to physically connect the signal generator to the FM and AM input. For example, do I need an attenuator between the Ultra and FM antenna input connectors?

I have found many neat uses for my Ultra and find the capabilities quite rich and the device very easy to use and configure. Thank you! I do have a couple suggestions around file management. Perhaps either one is already implemented and I just missed it? 1. In the dialogs where filenames are displayed, it appears files are sorted by file creation date. I find in most cases, for me anyway, a sort by name would be much preferred. My next preferred sort would be reverse by modification date (most recently modified first). 2. Additionally, it would be great if there were a way to rename files (directly, not by connecting a PC or other device). As a thought to solve both of these, two control buttons could be added to the "Preset / Load SD" page: One on the left-bottom corner to the right of the DEL control labeled REN for REName. This would permit selection of a file followed by the file naming dialog. One on the right-bottom corner to the left of the X control labeled SRT for SoRT. This would toggle the file sort order between whatever options are permitted (preference being name, modification date, creation date). Bonus points if sort order saved across boots. Peter

A multi-band configuration when restored from SD does not restore RBW. Duplicate by changing the RBW followed by a restore. Oddly, the RBW field in the display shows the incorrect RBW actually being used but when you click on it to bring up the RBW setting the correct/desired value is checked, not the one actually in use. NOTE: This is only a defect for configurations WITH multi-band AND when saved to SD, not one of the 4 in-memory slots. If you prefer, I can open an issue in for this in github. Not sure of proper protocol. Peter

New FW release Version V1.4199 Changes: - Selftest 8 corrected. -- Designer of the tinySA For more info go to https://tinysa.org/wiki

Not a big deal, but I'm interested how to grab a screen capture after a completed selftest (no errors) on an ultra+. When the self test is complete it states touch the screen to exit, touching the SD icon the selftest exits also the jog button seems to be disabled until the test is exited. I understand you can take a pic with a phone etc, just wondering if I've missed something. Dave

My TinySA ultra device is giving me a "SI4468 Configure Fail" error and is not coming up. Any advice on how to recover ? Thanks Sridhar

New FW release Version V1.4198 All Ultra versions Changes: - Possible reduction of spurs around 4.278 GHz visible on some ZS-407 HW -- Designer of the tinySA For more info go to https://tinysa.org/wiki

Hi, I'm beginning to use WinSpectrum III and I don't know how to switch inputs from the application. I works ok if I switch them in the tiny. Best regards, Ignacio -- Este correo electrónico ha sido analizado en busca de virus por el software antivirus de Avast. www.avast.com

Today, as I was going to measure the frequency (sensitivity) plot of a 500 MHz Keysight oscilloscope, I found that the measured amplitude was going to increase by approx. 6 dB from approx. 150 to 300 MHz, and then drops down somewhat. Despite a direct connection using SMA-BNC adapter and direct coupling without coax cable and a 50 ohms scope input. At any case: the behaviour got (expectedly) a bit worse when I selected a high impedance input while using a BNC T-connector for termination with a BNC 50 ohms termination resistor. After doing some experiments, I discovered this: with the latter configuration I also switched the internal 50 ohms to active state (resulting termination: 25 ohms). It was a nice surprise that the amplitude shown on the screen was really constant over the whole range that was used (up to 500 MHz), while the amplitude under 150 MHz was fairly the same as in the case of a single 50 ohms termination. The question: what about the output impedance of the generator? Rob

I'm new here and new to my TinySA Ultra and NanoVNA. Trying to keep it affordable, I'm just trying to figure out what accessories I should buy first and which ones I should still buy but can wait until later. What attenuators should I get first? I have an assortment of connectors/adapters and I have these two attenuators, https://a.co/d/bFnpBAT, https://a.co/d/b4JeLwu . And a 15w 0-500Mhz Dummy Load https://a.co/d/8fGnqdi Is there anything I should buy to protect the SMA connectors with adapters on the TInySA like some people have mentioned? And do I need anything for the antenna? Someone mentioned a DC blocker like this, https://a.co/d/aHC3juo Is there an upgraded antenna worth buying? I'd like to have a second one on hand as backup anyway. I'm wanting to test out some Ham radio handhelds and my mobile Anytone AT-778UV Ham Radio. They are UHF/VHF. And then I'd also like to test out some CB radios. I've been reading mixed reviews on everything so I figured I'd ask here before I started ordering things I don't need or end up ordering the wrong things. Thanks for the help.