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The level calibration of my tinysa ultra fails with "Signal level incorrect". The device was ordered from an authorized vendor. HW firmware is v0.4.5.1 and SW firmware is 1.4-199. The device was reset before testing, and two different SMA cables were used. I checked the CAL output with another spectrum analyzer and the level and frequency looks fine. When generating a sine wave with another device, and changing the output level, the tinySA shows the correct level with different attenuator values, so to me the attenuator looks good too. Running the selfest, Test #14 fails with "Signal level Fail": This is after running level calibration and selfest: --- leveloffset low -0.0 leveloffset low_output 0.0 leveloffset switch 0.0 leveloffset receive_switch 0.0 leveloffset out_switch 0.0 leveloffset lna 0.0 leveloffset harmonic 0.0 leveloffset harmonic_lna 0.0 leveloffset shift 0.0 leveloffset shift1 -2.7 leveloffset shift2 -2.7 leveloffset shift3 0.8 leveloffset shift4 -0.2 leveloffset drive1 0.0 leveloffset drive2 -1.7 leveloffset drive3 -1.3 leveloffset direct 0.0 leveloffset direct_lna 0.0 leveloffset ultra 0.0 leveloffset ultra_lna 0.0 leveloffset adf 0.0 leveloffset direct_output 0.0 --- correction low 0 10000 12.2 correction low 1 50000 7.6 correction low 2 200000 4.5 correction low 3 400000 2.2 correction low 4 900000 0.4 correction low 5 20000000 -0.4 correction low 6 30000000 0.0 correction low 7 100000000 -0.8 correction low 8 160000000 -0.4 correction low 9 230000000 0.5 correction low 10 290000000 0.3 correction low 11 400000000 1.0 correction low 12 520000000 0.1 correction low 13 600000000 0.5 correction low 14 660000000 0.4 correction low 15 740000000 1.5 correction low 16 790000000 3.0 correction low 17 810000000 4.7 correction low 18 820000000 6.3 correction low 19 830000000 8.7 --- Does this look like a defective LNA? If yes, is for U14 the part BGA2817 the correct one? Would be great if someone can confirm. Thanks Kevin

backstory: was trying to unlock a new tinySA ultra to go above 800mhz. I forgot the menu location and code but figured i'd give it a try. found 'expert config -> internals' menu and typed in 0000 as a guess. after that the unit was frozen. power cycle, system boots then immediately freezes. if i hold the slider left or right while booting, the unit will scroll frequencies until the slider is released then immediately freezes. I have tried to no avail: flashing new and old firmwares. reset via tinysa app (windows) open and unplug battery then retry. any ideas? thanks

Good day, I would like to know whether I can apply the Antenna Factor (AF) for my calibrated biconical antenna to measurements being made by the TinySA Ultra. Antenna theory refresher: The AF is a value that lets you go from measured intensity to actual E-field intensity. It is critical when doing compliance testing of radiated emissions. If the AF was just a single value I could apply it to the TinySA settings as a pretend attenuator between the antenna and the TinySA. But the AF of my antenna is highly frequency-dependent, varying by over 20dB over my frequency range of interest.

Hi to the group ! Is the vendor "ToolTop" on AliExpress a good source for the TinySA? They show more than 900 sold with more than 200 mostly positive reviews and state that it is genuine. The price is just over $43.00 USD with free shipping. Jim WB4ILP

Hi I hope someone can help. Previously, my Tiny SA Ultra has locked itself up a couple of times during simple interaction with the menu. Whenever this happens, if I start it up, it freezes on a display at 349.2MHz (image attached). The first time this happened, the power disconnection method from inside the unit resolved the problem. On the second time this didn't work but starting it up without the SD card inserted did. On this third occasion, neither method has worked. Even leaving the battery disconnected for > 10 mins. Just before the 3rd occasion, I had performed a firmware update to v1.4-177. The update worked fine using the TinySA-App and it passed a self-test. It wouldn’t loaded my previous settings so I was manually re-entering my presets. During this it locked up for the third time. I can still put it into DFU mode and apply different firmware via the app but the same frozen screen happens everytime I start it up. I noticed another owner describe a similar problem online where if they hold the jog wheel to the left or right as it starts up, you can still briefly change the frequency from 349.2MHz. However, that’s it. It is a legitimate TinySA Ultra purchased in Feb 2024 from a supplier listed by tinesa.org. Ultra mode had been enabled. Calibration checked. - s/n: SU-24014581 - h/w version: V0.4.5.1.1 Any help would be appreciated. Regards Tristan

Hi everyone, I have used my tinySA basic version for several years and it has passed the self-calibration. When I set the 10MHz test and connected nothing, it would appear in the spectrum. I have also ruled out the interference from my environment. Is this an internal circuit problem?

setup: zero span , unit as dBmV. Now when I set a trigger level the correct level is shown on the left side of the display. But the trigger menu shows the value in dBm (appr dBmV minus 47), although the unit is shown as dBmV. Is this a bug? regards, Henk

Thanks to Erik and All devs for a wonderful device, also thanks to Ian for his great python work (the app) Just wondering about expected behavior of the 407 when working close to 7.3g, I'm doing some environmental monitoring of Video Links 7.1, 7.285, There seems to be random noise from the 7.3g mark onwards, is it case where the unit can only be used in Ultra under 7.3 and then must recalibrated to Harmonic Mode 7.3 and above ? there arent any option for a cross over range are there ? Second question (RF/SpecAn), I have been learning about the DANL change that occurs when changing the RBW my question, should power level dbm remain consistent when changing RBW, is it only the accuracy & DANL ? Thanks Ash

A handy formula…..plot your antenna gain vs. frequency and convert to AF vs. frequency -Charlie W5CDT

Anybody used PCTEL OP451 (450 MHz – 6 GHz, VSWR <2.0:1, 50 Ohm) wideband antenna with TinySA Ultra? It is a good match? Anybody had any experience with this one or a similar antenna? Pros and cons? Should I be worried about cable length? Specs seems to indicate that gain values include cable and connector losses. And reading the messages in group, I MUST use TRACE/CALC/TABLE TRACE and create a trace containing a 8 point linear interpolation of the AF versus frequency from the antenna gain graph? Is it ok to "approximate" the graph points to only 8 points in the TABLE TRACE? Thank you!