Erik,
? The main Wiki page shows the following image for the tinySA Ultra:



The input maximum RF level is labeled as +10dBm and maximum DC voltage as 10VDC.? On the delivered tinySA Ultra's, the input maximum RF level is labeled as +6dBm and maximum DC voltage as 5VDC.

Was there a particular reason the delivered units had their input RF and voltage levels derated?

Herb

On Fri, Dec 2, 2022 at 08:01 AM, nechry wrote:

. Do I have to open and modify the alignment myself, without losing the guarantee? what are my options.

Yes, please do

I ordered the Tinysa ultra at 19th November from Zeenko store, Aliexpress, China, and the instrument just arrived to my hands.

after turning it on, I quickly noticed that the screen is not well aligned in the case. it is almost impossible to read the entire last line at the bottom of the screen. I have attached this photo. Do I have to open and modify the alignment myself, without losing the guarantee? what are my options.

?

Apart from this anomaly, I congratulate you once again for this excellent product, Erik, I already have 2 first generation tinySA.

Should be ok
--

Hello everyone,
I calibrated my new tinySA after it successfully passed all self tests. After the calibration finished (without any indication of a problem), I fed the 30 Mhz calibration generator signal to the low input to check if everything is ok. The reading was -27.4 dB @ 30.2 Mhz, and I think that's a bit to low to pass as ok.
Is there anything I can do about this?
As to the question if my unit is genuine, I am not 100% sure. I made my purchase before becoming aware of the clone issue, and the place I bought it from? is not among the licensed vendors according to the wiki. On the other hand, the back plate checks out, but I guess it still could be fake.
I highly appreciate any suggestion how to proceed.

I wish all of you a nice day!
Matthias

Hi all,

just received mine. Ordered 10th Nov. at Eleshop, shipper GLS delayed one additional day - now screwing on SMA port savers :-)

Arno

Just wanted to provide a bit of a follow-up.? I received the new attenuator and did the same readings.

Thanks for the clarification!

Mirek



Dne 02.12.2022 v 15:47 Erik Kaashoek napsal(a):

Only a limited set of parameters (Attenuation, start/stop freq) is restored back to before shutdown, all others come from STORE AS STARTUP
But after startup you can do LOAD STARTUP to restore everything back to the saved startup configuration
--

开云体育

The startup function itself doesn't work somehow, when TinySA is turned on it always sets the last state before shutdown and it doesn't matter what was saved STORE AS STARTUP.

Mirek

开云体育

Next I tested...
When I set the upper band and save it as STARTUP, when I turn it on, the STOP frequency is set to 800 MHz and the upper band behaves as off again.
The bad behavior is somehow related to using the STORE AS STARTUP function.
As long as I do not use the STORE AS STARTUP function after CLEARCONFIG, the behavior is OK.

Mirek

Will see if I can replicate this and find the cause.
--

开云体育

Thank you for the very quick reply, Eric!

I did CLEAR CONFIG according to your advice and the behavior is as it should be, it is ok!

But it is OK only until I set the range from 1 to 100 MHz and save it as STORE AS STARTUP. After that, the behaviour is the same as before, i.e. bad.
So I must not set the lower band range as STARTUP.
Thanks for the help!

Mirek

Can you do a CONFIG/MORE/CLEAR CONFIG and do the tests again so see if anything changed?
--

开云体育

Hi, Erik!

When I turn on TinySA, Ultra Mode is marked as on. When I turn Ultra Mode off and on again, the sensitivity on the upper band is OK!

The error is therefore in the UltraMode reset.

And indeed, when I turn on TinySA, even when UltraMode is on, it cannot set frequencies above 800 MHz
I have to turn Ultra Mode off and back on.

Thanks, Mirek

I can't replicate this.?
The loss of sensitivity above 800MHz indicates the device does not switch to ultra mode when asked to scan above 800MHz.
Can you disable/enable ultra mode after loading the preset and check if the sensitivity above 800MHz comes back?
--

I set the band 1MHz to 3 GHz
PRESET...STORE...STORE1

I perform the calibration
CONFIG...LEVEL CAL...CALIBRATE 100 kHz TO 5.34 GHz...CALIBRATE

I will connect HP8657B generator, out level -60 dBm
TinySA: 100 MHz -60.3 dBm
??????? 500 MHz -60.3 dBm
??????? 750 MHz -60.5 dBm
??????? 900 MHz -60.4 dBm
??????? 1600MHz -60.8 dBm
Excellent accuracy! Congratulations.

Turn off TinySA...Turn on TinySA...PRESET...1000kHz 3GHz
I connect the HP8657B generator, out level -60 dBm
TinySA: 100 MHz -60.3 dBm
??????? 500 MHz -60.3 dBm
??????? 750 MHz -60.5 dBm
??????? 900 MHz nothing
??????? 1600MHz nothing
Above 800 MHz the sensitivity is very poor, calibration is lost.

TinySA ULTRA S/N SU-22110028? FW 1.3.510-g7b602fc

73, Mirek

Making the screen width/height variable will lead to substantial increase in code size and lower the speed of display updates.
This will not have a high priority

--