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Re: FM demodulation with tinySA Ultra

 

Hugo,

Only AM, but according to Erik's hint to use slope demodulation you can also listen to FM:
/g/tinysa/topic/95601297#8496

Martin
FM demodulation with tinySA Ultra

[email protected]
 

Does the tinySA Ultra also only implement AM demodulation? Does any one here have success using slope demodulation for the FM-band 88MHz to 108MHz), if so which settings worked?

kind regards
Hugo
Re: Correcting generator level error above 1 GHz

 

Yes, using the "correction" command via serial over USB you can fully correct all frequency dependent input or output levels
You can experiment with the command but I still need to write good documentation on how to use this correction command

--
For more info on the tinySA go to https://tinysa.org/wiki/
Re: Correcting generator level error above 1 GHz

 

Yes, I see, the spurious are higher than the output frequency and the power meter reads the level sum,
so will use a Ytf (Yig tuned filter) preselector to avoid this.
Anyway, using a calibrated spectrum analyzer with direct connection sma-sma there are? level errors.
Reference from 3 to 4 GHz -30dBm no errors(0dB),? from 4.5 GHz? to 5.4 GHz? are -2dB.
Tinysa is a very good test instrument ,? I ask if may be improved this frequency flatness by software.
Re: Correcting generator level error above 1 GHz

 

How do you measure the power?
Using a broadband power meter?
--
For more info on the tinySA go to https://tinysa.org/wiki/
Re: TinySA Ultra - Hardware version "unknown"

 

Let me investigate why this happens.
--
For more info on the tinySA go to https://tinysa.org/wiki/
Re: Correcting generator level error above 1 GHz

 

FW 1.4028
mode highest accuracy
Re: TinySA Ultra - Hardware version "unknown"

 

After powering off and on the HW version is "V0.4.5.1 (169)"
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Klaus, DL5KV
Re: TinySA Ultra - Hardware version "unknown"

 

Today I updated the firmware. After powering on and reloaded the calibration data the HW version is shown as unknown (168)
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Klaus, DL5KV
Re: Calibration Issues on my new TinySA

 

Ok Erik,
I have contacted the seller on eBay?
I will see what they say about returns.
thanks for your assistance.
Re: Correcting generator level error above 1 GHz

 

What output mode where you using?
--
For more info on the tinySA go to https://tinysa.org/wiki/
Re: Correcting generator level error above 1 GHz

 

What FW are you using?
--
For more info on the tinySA go to https://tinysa.org/wiki/
Correcting generator level error above 1 GHz

 

Hello Erik
The level error of the output generator is +3dB at 1.5GHz, +6.5 dB at 4 GHz, +8dB at 5GHz. No error? reference is output level -30dBm at 3 GHz.
Is it possible to correct the flatness(10 points from 1 to 5.4 GHz)with a software update or by usb serial command?
Re: TinySA ULTRA LEVEL CAL -> Signal Level incorrect #ultra

 

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Erik-san

?

Thank you for taking a look at the caliblation results.

I will replace the parts for U14 BGA2817 as advised.

It will take some time for the parts to arrive so I will work on it next week.

?

Thanks.

Masahiro Kusunoki/JP3SRS

?

From: [email protected] <[email protected]> On Behalf Of Erik Kaashoek
Sent: Tuesday, January 10, 2023 7:42 PM
To: [email protected]
Subject: Re: [tinysa] TinySA ULTRA LEVEL CAL -> Signal Level incorrect #ultra

?

The calibration did partially complete, the LNA level calibration seems to have failed.
And selftest 13 fails, this is the LNA test.
It seems the LNA is not working correctly
The reason the older FW did not show this error is because the check of the signal level during LNA calibration was only introduced in newer FW version.
You can try yo replace the LNA, this has previously been done by someone so it seems to be possible.
The LNA is U14 and it is a?BGA2817, available from many suppliers for acceptable price.
Or you can contact the supplier for replacement.
--

For more info on the tinySA go to

U14-BGA2817.jpg

Re: TinySA ULTRA LEVEL CAL -> Signal Level incorrect #ultra

 

The calibration did partially complete, the LNA level calibration seems to have failed.
And selftest 13 fails, this is the LNA test.
It seems the LNA is not working correctly
The reason the older FW did not show this error is because the check of the signal level during LNA calibration was only introduced in newer FW version.
You can try yo replace the LNA, this has previously been done by someone so it seems to be possible.
The LNA is U14 and it is a?BGA2817, available from many suppliers for acceptable price.
Or you can contact the supplier for replacement.
--
For more info on the tinySA go to https://tinysa.org/wiki/
Re: My tinySA Ultra Signal level Critical #ultra

 

Thanks,Erik Kaashoek.? I already ordered.
Re: Calibration Issues on my new TinySA

 

Cal signal is correct level.
And end screen of calibration shows everything being OK.
May I suggest you contact your supplier?
--
For more info on the tinySA go to https://tinysa.org/wiki/
Re: Correct frequency not effective with TinySA App?

 

Hi Erik,

yep, the offset for the TinySA App stays in the ballpark area of 500 to 700 Hz for the harmonics at 20 and 30 MHz.

TinySA:


TinySA App:


Not a big issue here, just wondering...

Thanks for all your work,
Chris
Re: My tinySA Ultra Signal level Critical #ultra

 

Start with replacing the switch, U22
part number: XA17-G4K
https://www.lcsc.com/product-detail/RF-Switches_XINLUDA-XA17-G4K_C513494.html
--
For more info on the tinySA go to https://tinysa.org/wiki/
Re: My tinySA Ultra Signal level Critical #ultra

 

Before measure signal I know the level of signal +8dbm? ?and I use physical attenuator -10dbm for reduce signal level about -2dbm with not over +6dbm (tinySA specification) .
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