Re: Calibrate Frequency of Generator on TinySA Ultra
The accuracy is specified in the wiki
20Hz error seems within the spec --
For more info on the tinySA go to https://tinysa.org/wiki/
|
Calibrate Frequency of Generator on TinySA Ultra
Hello Eric, today my Ultra arrived. Totally happy. Have a Question. in SA Mode i have a frequency correction of 150 entered. All is Fine. in Generator Mode the frequency is 20hz@10mhz?incorrect. is it possible to enter a correction of the Frequency in Generator Mode independently? Best regards? Ralf
|
TinySA Ultra in stock at R&L Electronics
I called R&L to verify before I ordered one.
Mike N2MS
|
Re: Crude filter for 5.34Ghz
Mike,
This article will give you more info than I can ever type out?
Only difference is I used SMA jacks instead cable pieces and slightly longer probes since I did not needed it to be too narrow band. I used a 1-1/4pipe cap I had on hand from a plumbing project and instead a PC board I used a piece of hobby brass sheet 0.02 inches thick I bought at the local craft store a while back. It is not that critical as long as the cap isn't too big.
John
|
Re: Customer video of tinySA Ultra above 10GHz
Eric, That is very similar to what I have seen. A 0dbm signal displays as a -33dbm signal one one unit, the other is -34dbm.?
|
Re: Another application example for the TinySA Ultra at >10GHz
I made a new test. This time I used an LNB with two outputs. One is connected to my field meter (which powers the LNB), the other is connected (via a DC blocker) to the TinySA Ultra. I set the field meter to 0MHz IF frequency, so that the downconverted frequency is shown, instead of +9750/+10600 MHz. The field meter shows the signal at 1538MHz (=11.288MHz) and again the TinySA Ultra shows the same signal (measured simultaneously) at 1411MHz.   Connecting the TinySA in line with a sat receiver shows all transponders at the correct frequencies. I really think that the SGS 101 messes up the TinySA somehow and by now I trust the TinySA more than the SGS 101!
|
Re: Another application example for the TinySA Ultra at >10GHz
On Wed, Dec 28, 2022 at 03:23 AM, Vitor Martins Augusto wrote:
It would be interesting for me to measure this frequency with some other device,
Can't the Ultra see the LO of the downconverter? ? --
For more info on the tinySA go to https://tinysa.org/wiki/
|
Re: VMA Simple Spectrum Analyser for TinySA
On Wed, Dec 28, 2022 at 02:57 AM, Vitor Martins Augusto wrote:
The difference between the trace coming from rawscan vs hop is definitly due to different RBW settings being used.
Hop uses the RBW as currently set on the Ultra. If you want to have a defined RBW you better set the RBW explicitly to 2*span/points? maximized at 850kHz. scanraw and hop start to differ once the 2*span/points > 850kHz? hop will "sample" the spectrum where scanraw will measure all frequencies. ? --
For more info on the tinySA go to https://tinysa.org/wiki/
|
Re: Another application example for the TinySA Ultra at >10GHz
That looks great and matches my experiements with the ADF4351 based signal generator using harmonics up tp 12GHz. The problem I experience with my SGS 101 is certainly not caused by the TinySA Ultra. Because I lack any other equipment to directly measure the signal produced by the SGS 101, I need to use a Ku-band universal LNB to downconvert.
I think that there might be a frequency shift due to the downconversion taking place, which the field meter compensates. It would be interesting for me to measure this frequency with some other device, but I don't have anything suitable at this moment.
Regards,
Vitor
|
I measured the frequency response of two Tinysa ultra using HP, R&S, Wiltron generators and a calibrated power meter, +/- 0.3 dB as reference. Both Tinysa are better than specifications and between error is less of 1.5 dB. For the users that wants to use upper than 6 GHz, just as hint,? in the attached file is included a correction table .  Best greetings for 2023 to all the team. Sandro
|
Customer video of tinySA Ultra above 10GHz
Someone made a short video comparing the ultra with an HP SA up to 10.638GHz Ar 10.638GHz his Ultra had lost about 28 dB dynamic range -30dBm was displayed as -58dBm --
For more info on the tinySA go to https://tinysa.org/wiki/
|
Re: Crude filter for 5.34Ghz
On 12/27/2022 10:28 PM, John Cunliffe
W7ZQ wrote:
se a cheap
Chinese source that goes to 6Ghz (plus has a doubler to 12Ghz). My
only beef is that there is ample of crud coming out of it besides
the desired signal.
Good one John, I see your 5/16 in the corner :0)
BTW: How about a little more detail on the filter, i.e.
construction?
Mike C. Sand Mtn GA
|
Since I don't always have access to the nice test equipment from work I decided to come up with something else to generate the 5.34Ghz signal for calibration. I use a cheap Chinese source that goes to 6Ghz (plus has a doubler to 12Ghz). My only beef is that there is ample of crud coming out of it besides the desired signal. So I made a crude pipe cap filter as described by Paul Wade W1GHZ. I did not had the exact materials and I wanted connectors so I played around with different items I had at home. The result is a filter that has about 1db loss, is about 450Mhz wide to the 3db points but cuts the 2.5Ghz fundmental and other crud that is anywhere between -10dbm and -40dbm? totally out. I can not see it with my? Avantek analyzer. One observation I made, since there is no filter in ultra mode there are some ghost signals. A 2.5Ghz -20dbm signal that is clean as a whistle and harmonics less than -80dbc at 5 and 10Ghz will display as a ~ -50dbm signal on 10Ghz. So people do need to be careful using harmonics to test. The signal you are seeing might not really be a harmonic generated by the external device but a signal internal generated in the Tiny.I.M.O. High Pass filters that suppress the fundamental are imperative for valid measurements if someone uses harmonics to test. Anyways, here is a picture of the pipe cap filter. The long interconnect cables are used as an attenuator to bring the signal at the end of the cable to -24dbm for calibration and of course for convenience  . After calibration the Tiny is within 1 db of the test signal. Astounding.
|
Re: Unable to get Listen to work on Ultra
RBW set to 100kHz and FM sounds great. 30 was not good.
|
Re: Another application example for the TinySA Ultra at >10GHz
Erik, the frequency is more accurate than I ever expected (I didn't see an error to 5 decimal places even on 5th harmonic). Very good, thanks also to your firmware!
|
Re: Another application example for the TinySA Ultra at >10GHz
Any findings from the test? --
For more info on the tinySA go to https://tinysa.org/wiki/
|
Re: Another application example for the TinySA Ultra at >10GHz
Hi,?as promised, I did some frequency accuracy measurements on the TinySA ULTRA today. I used the latest firmware v1.4-8, SA calibrated to 800 MHz, no frequency corrections, span 20 MHz, RBW and VBW set to Auto. Below 800MHz the SA was physically connected via an attenuator to the RF generator, above 10GHz the SA had only a short piece of wire on the SMA input for reception. The radiated CW energy was -36 dBm below 800 MHz. And below -2 dBm above 10 GHz. I used a calibrated and verified Wiltron 20 GHz RF generator, below 800 MHz a 3 GHz HP RF generator, and for onsite verification an Anritsu MF2413B a 27 GHz GPSDO - stabilized frequency counter. Results are as follows: Frq: 656 MHz    11.000 000? GHz?? 3rd SA harmonic    15.000 000 GHz 5th SA harmonic    20.000 000 GHz 5th SA harmonic    Setup ...    Mike, S51KQ
|
Re: VMA Simple Spectrum Analyser for TinySA
In the interests of efficiency, may I politely suggest that anyone wishing to use Vitor's SW send their System Code directly to Vitor rather than to the whole group, otherwise I anticipate a lot of un-neccessary Group traffic simply on system codes which are of no interest/value to anyone but the sender and Vitor?
Thanks in polite anticipation.
Nigel G8AYM
|
Re: VMA Simple Spectrum Analyser for TinySA
Vitor.
I would like to try your software.
my code: FFC96E092362
Thank you for letting us experience it.
|
Re: VMA Simple Spectrum Analyser for TinySA
My system code is 7F58589E09FE
Thanks in advance
Andy G4HUE
toggle quoted message
Show quoted text
------ Original Message ------
From: "Vitor Martins Augusto" <vma@...>
To: [email protected]
Sent: Tuesday, 27 Dec, 2022 At 10:18
Subject: [tinysa] VMA Simple Spectrum Analyser for TinySA
Hello,
Here is a first version of my software with support for the TinySA Ultra. I attached the manual for the SMA/NWT/D6/LTDZ version of my software, as many concepts are similar - but note that the TinySA does not have the TG functionality described in t he manual.
The software requires a license to work: just start the software, generate the System Code and send it to me.
I will reply with an Activation Code. These are valid until the end of the current trimester and free of charge. Once they expire, new codes can be requested for free.
There is a lot to do and the software can crash or become unresponsive if setup with parameters that lead to a long sweep time. This is, at the moment, not really a bug: if the sweep takes like 2 minutes, you need to wait before being able to do something else. See my feature request for the scanraw command. Need to see what can be done about this, but perhaps Eric has an idea.
Also, the TinySA/TinySA Ultra and LOW/HIGH or Normal/Ultra settings are not retained, yet. I need to add them to the Registry. That is on the TODO list. Also, none of the signal generator functions are implemented.
Note that the purpose of my software is not to replicate what is going on on the TinySA screen onto a bigger computer screen. All my software does is to use the scanraw command to get the samples (always 752, like the Siglent SSA3000X series). The data is then processed with my own algorithms and measurements. My software works with a whole range of devices capable of doing a frequency sweep. It mainly serves me as a platform to develop spectrum analysis related functionality and measurments, like the automatic transponder recognition, which is useful in the context of TV, CAT and SAT reception.
I recognize that the software version for the TinySA is not remotely as useful as other devices I support like the SMA/NWT/D6/LTDZ devices, because Eric did a fantastic job and already made the TinySA as feature rich as one could imagine! Here my thanks and respect to Eric for developing the TinySA. I believe that the TinySA is a disruptive piece of equipment, as it allows real spectrum analysis at a ridiculous low price tag. I wonder why RF electronics courses at university haven?t introduced live lab classes where each student gets hands on training with a TinySA, yet. Instead students are getting what is mainly a live demonstration by the teacher on one single spectrum analyzer (at least this is what I am aware of - correct me if I am wrong).
I am open to any feedback, suggestion, feature requests. But please bear in mind that I have little time (busy with two jobs and family), so not everything can be handled straight away.
Also, please don't rant about the software not being freeware and/or open source. That is my choice and there are many reasons for that.
Kind regards,
Vitor
|
John Cunliffe W7ZQ
Mike C.
Dave
Wander Lucio