#557b 

Thanks

you now recommend 10 volts max?

@@IMSAIGuy I realize you're under no obligation but you should consider removing the comments interaction by "Francisco Braylen" and "Morgan Adriel" from this comment thread. The interaction is fake and used to promote a potential phishing application putting your viewers at risk. Cheers!

@@BreakingPintMedia thank you

What about using a DC block always in the input? Does it avoid any DC destructive levels ??

sounds good, just keep the RF down below 10W and not 100

they work either direction

Yes, the TinySA will be damaged if any power above +10dBm (10mWatt) is applied. And I see a lot of people with damaged ones. This is true for most all spectrum analyzers. The newer TinySA models now come with a warning sticker on it. You also need to be careful hooking up sources to a power meter. The fancy power sensor I used in the video is only good to +23dBm. You need a good assortment of attenuators to do RF measurements

depends on the power of the transmitter. 50,000 Watts will light a fluorescent 4' tube. You can always be cautious. start with a pad. start with the antenna not extended. if the power is low, remove the pad, if low extend the antenna. start 1000 ft away....

@@IMSAIGuy Wow. Didn't know that about the lightbulb LOL. 1000 ft away with a 20 pad sounds like a good start. Thanks!

Thank you, I learn something new from each of your videos, not just these devices - everything you've done here I know about. - Should I be concerned about external electromagnetic interference? With the TinySA's closely spaced components there could be flashover. I'm admittedly ignorant in this realm, it just seems that with the necessarily non-conductive box, there could be a potential for damage while nearby a KV source, whether on or off. What do you (all) think? Though not living near one, I often travel quite close to HV emanations, and while not too concerned because all are working fine, it brought up the question. I'm no ham radio enthusiast, just a radar tech for the USAF. I've wanted a SA since I learned how to work with the HP 8566x. I like understanding what's happening around me, RF-wise...or maybe I'm just nosy.

@@IMSAIGuy I am interested in Bio-EMC. Is it safe with TinySA Ultra to point a handheld triangular (log periodic?) directional antenna at the mobile radio tower on the roof of the opposing street side, or will this already need an attenuator. (Yet I haven't bought the device yet.)

I think this signal was 70MHz square wave.

there are some in the range of $25 that measure up to about +15dbm so would need attenuation. I'm not sure what the sensor is and what the frequency range would be.

I think most if not all are based on an analog devices chip that only goes to 500MHz but that might be enough.

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-bryrAUBNDj8.htmlsi=_mE_hJl9o3aPqb3q

yes that is a problem. you need to consider the freq range, resolution bandwidth, and number of points. many times I turn on hold max and let the instrument run for a long time to catch events

they are symmetric usually

They are usually in that type of low power bullet attenuators. We used to have some 100 watt attenuators. My boss told me to always use one end for a two way radio, because the mfr made the output (20 or 30 dB) end increasingly smaller in power rating as the attenuation increased. If I remember, they had "INPUT" on only one end. These had radiator fins on them, so that might give you pause if you spot those. Most of the time we just used them as dummy loads unless doing FCC testing or the output of a PA.

remember the spec is dBm (dB milliwatt). so if you use a 20dB amp on a 0dBm signal you get +20dBm and yes that will kill it. If you use a -50dBm signal and 20dB gain then you have -30dBm. that is OK

Excellent video, BTW! This is really for any SA, not just the Tiny.

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-C2eVLkIK3aI.htmlsi=rcPr_icL_Vly7xUw ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-8i5-O_8AZyk.htmlsi=6igMjfaCeuAbQ76K ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2NzuDoBWVLw.htmlsi=dB0EX8PznDnquRoB

yes, Alan, Pasternak, Weinschel, Midwest microwave, Narda to name a few

there is a self test in the menu

@@IMSAIGuy oh right on. Many thanks.

Sorry I do not. You can use a dummy load (50 ohms) and use a fast oscilloscope to measure the voltage across the 50ohms to measure power. You can not use a multimeter as they will not measure fast AC. Above 100MHz things get harder to do without expensive equipment. If you don't have access to a power measurement, then start with a large attenuator. then step up until you are no more than 0dBm. You usually know the maximum power that the device you measure is capable of.

it is a catch 22

100mW is +20dBm. you should use a 20dB attenuator.

@@IMSAIGuy awesome thank you so much that's what I was thinking but I wanted to be sure thanks 👍😃

no

I'm not familiar with the term 'DB Block'

@@IMSAIGuy Probably meant a DC current/voltage blocker, so only AC passes through.

ok, I will do a video

@@IMSAIGuy I am a big fan of you and the channel .and a little question how I can go with ultra to 0dbm output with signal generator. What is external gain 0dbm.

@@ElectronicsShow sorry I do not understand your question

@@IMSAIGuy sorry I translate .I reform the question .in tinysa ultra how I could set the signal generator output to 0dbm .what is down written external gain 0db .I hope it's clearer now thanks

the external gain setting is used if you have an external amplifier attached. if you have 10dB amp attached then the signal will be 10dB bigger, so the tinysa external gain setting just adds 10dB to the number. it does not effect the actual signal coming from the tinysa.