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Re: New FW release: Reduced CPU clock spurs and scanraw progress bar

 

¿ªÔÆÌåÓý



This is what I get.
12:? ?94.602M
13:? ?94.989M
14:? ?95.377M
15:? ?95.764M
16:? ?96.069M
17:? ?96.456M
18:? ?96.844M
19:? ?97.231M
20:? ?97.536M
?

my list is:

12:??? 96.484M

13:??? 95.211M

14:??? 95.626M

15:??? 95.958M

16:??? 96.373M

17:??? 96.705M

18:??? 97.093M

19:??? 97.397M

20:??? 96.650M?


Greetings

Sven Hegewisch

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For more info on the tinySA go to

Re: New FW release: Reduced CPU clock spurs and scanraw progress bar

 

To give an impression of the spur improvements

v1.1-86 spurs when using an RBW of 10kHz


Same using the new v1.1-88 FW

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For more info on the tinySA go to https://tinysa.org/wiki/
New FW release: Reduced CPU clock spurs and scanraw progress bar

 

New FW release
Version v1.1-88

Changes:
- The spurs caused by the 48MHz MCU clock have been reduced.
- The scanraw command progress is displayed using the green progress bar.

tinySA-App uses the scanraw command and with a large number of points and a low RBW it often is not obvious if the tinySA is still? scanning or how long? it would take till the end of the scan. The green progress bar give better insight in scanraw progress.

The mechanism used to reduce the MCU spurs makes some assumptions which I would like to see verified by some users.
Can some of you test this using the console command:
selftest 6
In reply you get a list of frequencies.
I'm interested in the frequencies listed after 12 to 20
This is what I get.
12:? ?94.602M
13:? ?94.989M
14:? ?95.377M
15:? ?95.764M
16:? ?96.069M
17:? ?96.456M
18:? ?96.844M
19:? ?97.231M
20:? ?97.536M
?
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For more info on the tinySA go to https://tinysa.org/wiki/
Re: #specifications #specifications

 

I posted these results earlier -? my measurements using a GPS disciplined oscillator as the frequency reference (1 ppb accuracy).? The error was small and consistent across the range:

TinySA Frequency Output Measurements
 ? ?
S/N SA-2009074 ? ?
? ? ?
Frequency (MHz) Error (Hz) Error (ppm)
50 -17.5 -0.35
150 -53 -0.35
200 -70.8 -0.35
400 -139.8 -0.35
600 -208.9 -0.35
800 -278 -0.35

Re: White screen of death?

 

For me it was the USB cable that was in trouble.
During a nanovna update I received an error and was no longer able to correct it. Only after replacing the USB cable was it possible to resolve.
73!
Re: White screen of death?

 

Can you try:

- USB 2.0 port (not USB 3.0)
- Different USB cable

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For more info on the tinySA go to https://tinysa.org/wiki/
White screen of death?

 

After installing the last firmware update (86), all I get is a white screen. I have tried both the STM32 Cube and DfuSeDemo programmers. After shorting the VDD and Boot0 pins it goes into dfu mode ok but when I try to program with DfuSeDemo? it completes with no error message but the Cube programmer shows the error below.? I have tried several older versions with no change. The unit was purchased from R&L Electronics so it should be legit.


? 11:55:59 : Download in Progress:
? 11:55:59 : Error: failed to download Segment[0]
? 11:55:59 : Error: failed to download the File
? 11:55:59 : RUNNING Program ...
? 11:55:59 : ? Address: ? ? ?: 0x08000000
? 11:55:59 : Start operation achieved successfully


Rick W7RMS
Re: #specifications #specifications

 

Yes I wrote, ?? because of the i.c. specification.
Anyway It's a little limitation , I tested at various frequencies and I make a correction table.

Re: New tinySA failing Self-test after FW upgrade

 

All is ok
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For more info on the tinySA go to https://tinysa.org/wiki/
Re: New tinySA failing Self-test after FW upgrade

 

Hello all,
I bought a TinySA "KKMon Spektrumanalysator" from seller Zeamar via Amazon just before christmas.
The package looked exactlay as in your photos. I dont know what software was installed, but everything including selftest worked fine.
After I learned how to install new FW I did so from version 1.1-59 up to 1.1-86. Everything worked ok but I made no selftests.
After reading about problems with new FW I made a selftest with version 1.1-86. This test failed randomly with "Test 10: Signal level Critcal"
See the following pictures which were made within 5 minutes.







I then made the attenuator test proposed in post #2769. The values were from 0 to 31 dB 27.5 +- 0.5 dBm. From 32 to 52
( more than 52 dB was not possible ) the values were 32.0 +0-1 dBm.
After that I made the liearity test from main -> check the attenuator which gave the following picture:



t


So maybe my tinySA is not a clone and totally ok, but Ireally do not know.
BtW: Theserial number is SA-20100692.

Sven Hegewisch






tinysa_screen Selftest 3 ok.png

Re: Tinysa tracking generator #feature_request

 

Hello John, thank you for the answer.
Yes, NanoVNA is an option. For IF filters it is even preferred. Erik tested NanoVNA as a spectrum analyzer and concluded that it is possible. However the question remains for the accuracy for narrow BW.

However, TinySA with tracking generator can do more than that. I can test receiver path from antenna to first IF ( or any IF ).

Lets say I would like to generate 7MHz AM signal, check my first mixer and tune 1st IF filters on 58 MHz.
-We connect TinySA LOW input to receiver mixier ( via high impedance probe, or to later stages of 1st IF ),
-TinySA shall be set to center frequency 58 MHz with span 100kHz.
-that sets TinySA LO to 433.9 + 58 = 491.9 MHz,
-we can send this signal to HIGH output and use it as RF for external mixer,
-in order to make 7MHz signal for receiver we need external RF generator with 491.9 + 7 = 498.9 Mhz ( or 491.9 - 7 = 484.9 Mhz ), This will be LO for external mixer.
-IF output of external mixer will have our 7MHz AM signal for receiver.

That is what Erik calls offset. IMSAI Guy on youtube has related video "TinySA Tracking Generator using External Mixer". Of course it is not plug and play. Proper levels, impedances shall be observed for each stage.

This looks like a good side project to build a lab.

Thanks again,
qwert.
Re: #tinysa selftest #tinysa

 

On Mon, Feb 15, 2021 at 11:56 PM, Hans Merz wrote:
Is there in my case a good reason NOT to try this STM32 software??
No reason at all.
The STM32cube programmer is a good tool. Give it a try.
?
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For more info on the tinySA go to https://tinysa.org/wiki/
Re: #tinysa selftest #tinysa

 

¿ªÔÆÌåÓý


Hi Erik,

Thanks for the advice,
I was spending a whole day on trying the new firmware installed. With home-brew and Terminal instructions. FDU and BIN files and the procedures mentioned on the several sites you mentioned. The TinySA on my USB port was regocnized. But no success. Maybe and probably my ignorance? I have BigSur OS installed.
Anyway I was wandering if the STM32 CubeProgrammer is a good way to deal with the firmware install? I saw that Kurt Poulsen mentioned it and also Imsai Guy.
Is there in my case a good reason NOT to try this STM32 software??
By the way I appreciate your You-Tubes a lot, clean and to the point! A Free TinySA ¡®university'



Op 14 feb. 2021, om 18:01 heeft Erik Kaashoek <erik@...> het volgende geschreven:

On Sun, Feb 14, 2021 at 08:41 AM, Hans Merz wrote:
Do you know a site with a simple explanation to use the TinySA FW upgrade for a Mac??
This is better:

?NanoVNA and tinySA use the same update method
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For more info on the tinySA go to https://tinysa.org/wiki/
Re: #specifications #specifications

 

See the spec


Its not the TCXO that is uncertain but a limitation of the PLL setting so the resolution does not depend a lot on the frequency
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For more info on the tinySA go to https://tinysa.org/wiki/
Re: #specifications #specifications

 

The 10MHz adjustment works for high band also, I measured at 800MHz? only 100Hz error.
Of course I had the same results testing Tinysa with other measuring system, spectrum analyzer with rubidium reference.
Re: Tinysa tracking generator #feature_request

 

How about using a NanoVNA??
--John Gord


On Mon, Feb 15, 2021 at 02:38 AM, <qwert0173@...> wrote:
Hello John, Sandro.
I would like to tune filters for SW radio. Radio has 3 IF¡®s 455 kHz, 10.7 and 55.8 MHz. BW is 4 till 10 kHz. Which ready modules for tracking generator would supplement TinySA for that task? I learned here that I would need 433 MHz generator, mixer and 350 MHz ( or lower for my application ) low pass filter. What would you suggest?
Br, qwert.
#specifications #specifications

 

Hi Erik,
I guess this is an issue with the resolution.I measured at 10 MHz 25 Hz error, but at 300MHz isn't 750Hz (25Hz x 30) .


Please see the pictures. Is? not possible to adjust exactly 10 MHz because of the i.c. specification. Useful to remember as you just described in the tracking gen. topic.
Looking for a Guest Speaker for my club

 

Hi,
I'm looking for someone with a TinySA to be our Workshop guest speaker and give a live demo via Zoom.

The Gwinnett Amateur Radio Society is one of Georgia's largest clubs with 300+ members...? We share our Zoom meetings with all the clubs in the Atlanta area so this presentation has the potential to reach hundreds...

Typically our Workshops are a 15-20 minute presentation?then we transition into the "Workshop" phase where we go hands-on and help attendees implement what was just taught and answer questions (for example: install and configure software, program radios, learn to solder, build antennas, etc.). With COVID-19 and Zoom meetings we extend the presentation to about an hour but still allow the attendees to ask questions...

So if you have a TinySA and the means to create a presentation and desire to share your knowledge please email me 1-on-1 at n4ddm@...
??
I'm looking to fill any of these dates:
  • 20 April?
  • 18 May
  • 15 June?
  • 20 July
  • 17 August
  • 21 September - Radio Scouting and JOTA?
Are you interested???

Please let me know.? ?


73 Dallas N4DDM
n4ddm@...


Whatever you do, don¡¯t fall victim to?¡°paralysis by
analysis.¡± Go ahead and buy/build one and start?
tinkering with it. This is a learn by doing hobby.

No politician or scholar assured your freedoms.
A Soldier, Sailor, Marine, or Airman did!
Re: Tinysa tracking generator #feature_request

 

Thank you Sandro. Very much appreciated! AGC and filters impedance will be taken cared for.
Qwert
Re: Tinysa tracking generator #feature_request

 

My hint is to use low level ( by attenuator or series resistor from Tinysa) to get the correct frequency response,calibrating receiver's IF section most? have agc control.
The filter's output impedance is higher than 50 ohm so a matching resistor or transformer should be used.
You may use tinysa as BFO for ssb also , it's stable and rather clean .
The LO at 443,9 MHz and ERA amplifier are on Ebay and the diode mixer isn't critical.
Sandro
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