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Thanks Lee, this sounds all very reasonable. I assume it has some data link but don’t know if it is for example level triggered to dial in, or compressed and uploads on demand or daily etc. But all

Ah, good points... But I have tested my attenuators with a VNA and they perform to spec within their rated range (the inexpensive ones usually claim DC to 1.3gHz). At the very top of that they might

How does a smartphone app work in a baby monitor mode? Baby monitor's are continually transmitting and I doubt this would be done over a cellphone call. Does it transmit over wi-fi and if so what is

Erik - using v1.4-196 and the same settings as earlier, the 533 MHz spurs are gone in all three Spur Removal modes! I also did sweeps in 100 MHz spans centered at 450 MHz, 550 MHz, and 650 MHz and did

Hi Lee, In common terms would your "inhibitor" also be called a "jammer? Mike C. Sand Mtn GA

Diez, The problem you have is that a mobile phone will be in 'sleep' mode for the duration of the time, it will 'wake' up and transmit to the base station to make sure its not moved and then will go

Otto, New FW release Can you test if the spur is gone? -- Designer of the tinySA For more info go to https://tinysa.org/wiki

New FW release Version V1.4196 Changes: - Removed spur on ZS-407 -- Designer of the tinySA For more info go to https://tinysa.org/wiki

Hey folks, I've bought a TinySA a while ago for some other project, but something has cropped up that? makes me wonder if it can help here. I'm not an RF professional, I know enough to know I don't

The internal attenuators are included in the calibration process External attenuators however small and cute are not included in that process and depending on which aisle of AliExcess you shop in can

Thanks-I did remember Larry volunteered and I have talked to him. John

Thank you - fortunately most of the activity that I am concerned about tends to be constant transmissions. Sounds like I should leave the Spur Reduction setting to On. Much appreciated! ~Otto

Erik - I have attached the screenshot. ~Otto

1. I like the effect of the LNA in my signal and test environments. 2. Even when I do not use the LNA putting little external attenuators on is trivially easy. They are not expensive, and their

OK - understood. I tried twice to download the firmware to the Ultra. It wad successful, but on power cycling the Ultra, all I got was a white screen. I'll download the bin file again and try it.

Please do post the screen shot with the spur. Leaving spur reduction on will make it more difficult to catch short bursts -- Designer of the tinySA For more info go to https://tinysa.org/wiki

What is your rationale for not doing so?? The designer put it there for good reasons. 73, Don N2VGU

This is the total power going into the front-end mixer, AFTER the internal and any external attenuators/couplers/amplifiers, not just the signal you are looking at. So, with 30dB attenuation +5dBm

Jim's advice is "right on" !!! Read it and internalize it!! However, WITH THE PROPER EQUIPMENT and knowledge, you can make your own couplers. As a minimum a good spectrum analyzer with a tracking

Ian said: I would recommend buying or building a 20dB or 30dB directional coupler for the frequencies of interest that can handle 10W power input, then attenuate the coupled output. Unless you have