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Clip on youtube with tinysa ULTRA on 10 gHz

 

Since there are not many video's ( yet ) we uploaded a small clip with the Ultra receiving a 10 gHz microwave motion detector tuned to ( i had to find the signal first and brought it up from 9 gHz to 10.385 ) running in a very basic setup.
 

Thanks, last week i did try the same with this:


Waveguide opening and black stamp on the back tells me X band.
I measured a nice curve when increasing the voltage.

But I could not find a trace with my homemade probe.
Will try again.

Sold my NOS 2k25's years ago.
 

Nice! The link is fine here...

I wish I had one of these in the 70s when I was using similar 10ghz gunn transceivers for transit vehicle beacon projects!

M
 

Hi I have just ordered the ultra and it has now been sent,?
I did not know that it went this high in frequency?
Thanks Dave?

On Thu, 15 Dec 2022, 13:25 Mario Vano AE0GL, <mvano@...> wrote:
Nice! The link is fine here...

I wish I had one of these in the 70s when I was using similar 10ghz gunn transceivers for transit vehicle beacon projects!

M

 

I am active on 10 GHz and have so much equipment for that band that I would have no trouble with a signal source. My transverter with a phase-locked LO is accurate to 50 Hz at 10368.100 MHz. I'm also working on a low power (~100 mW) beacon for that band.

Hopefully when I get a little more money accumulated I can get one of these new TinySA units.

Zack W9SZ


On Thu, Dec 15, 2022 at 3:15 AM pe1hwo <pe1hwo@...> wrote:
Thanks, last week i did try the same with this:


Waveguide opening and black stamp on the back tells me X band.
I measured a nice curve when increasing the voltage.

But I could not find a trace with my homemade probe.
Will try again.

Sold my NOS 2k25's years ago.

 

It works well at this frequency, if you have a known amplitude source you can use it, see how much lower the Tiny is reading and then do an offset in the external gain section. You can then save the setup as one of the presets. I did that with a known 0dbm signal (at work) on 10.368 Ghz and now it reads as 0dbm signal.(my signal offset is 31db)? In a span of 5Mhz the dynamic range with? a little tweaking of the settings can reach ~50db. Not too shabby. I use high pass filters between my equipment at home and the tiny at 10Ghz this prevents some of the crud on lower frequencies from overloading the mixer.

A short note, if you use a lower frequency source and use one of the harmonics to either cal the 5Ghz step or look at higher harmonics use a high pass filter to prevent the fundamental from overloading the input of the TinySA and thus give you a wrong reading / signals that are not really there. Mini Circuits makes some small high pass filters that come for different microwave frequencies and can sometimes be found for pennies on e-bay.?
 

I have an HP435B power meter with an 8484A head. It measures power accurately up to 18 GHz. It will work at 24 GHz with a little bit of attenuation. I've determined that its power indication at 24 GHz is ~3 dB lower than what the power actually is.

But I can measure and adjust power levels very accurately using this meter.

Zack W9SZ


On Thu, Dec 15, 2022 at 12:22 PM John Cunliffe W7ZQ <n2nep@...> wrote:
It works well at this frequency, if you have a known amplitude source you can use it, see how much lower the Tiny is reading and then do an offset in the external gain section. You can then save the setup as one of the presets. I did that with a known 0dbm signal (at work) on 10.368 Ghz and now it reads as 0dbm signal.(my signal offset is 31db)? In a span of 5Mhz the dynamic range with? a little tweaking of the settings can reach ~50db. Not too shabby. I use high pass filters between my equipment at home and the tiny at 10Ghz this prevents some of the crud on lower frequencies from overloading the mixer.

A short note, if you use a lower frequency source and use one of the harmonics to either cal the 5Ghz step or look at higher harmonics use a high pass filter to prevent the fundamental from overloading the input of the TinySA and thus give you a wrong reading / signals that are not really there. Mini Circuits makes some small high pass filters that come for different microwave frequencies and can sometimes be found for pennies on e-bay.?

 

But I can measure and adjust power levels very accurately using this meter.


Erm, as long as there are no other signals at the output. I have several of those sensors with the 435b and the E4418B. Great power meters, but inherently broad band measuring everything from DC to 18ghz that is coming out of the unit and sum the power into one reading. The 4418B has a setting for frequency and most people think its for a selective measurement but alas it only changes the calibration factor. I always use them with band pass filters. I have a set for all frequencies I am interested with defined attenuation values I just add to the offset settings in the 4418.That way I know that my power actually is.

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