Re: Analog detector output in Zero span mode #feature_request

#19457

There is indeed an AGC active in the firmware

This can easily be removed, or even be changed to user settable.

--

Designer of the tinySA
For more info go to

Re: Using TinySA and NanoVNA in RF

#19456

The VNA by itself should be suitable foe sweep alignment. But it is not plug and play. A method needs to be worked out that is safe for both the radio and the VNA and produces reaonable results.

On Fri, 14 Feb 2025 08:59:52 -0800
"Martin via groups.io" <martin_ehrenfried@...> wrote:

It is difficult to tell because part of the procedure is missing, and the resolution of the scanned page is not that good (Groups IO scales it).

At first glance, it looks like a voltage output, or some other trigger, from the swept oscillator time base, needs to be driving the scope X axis, to produce a frequency (X) vs amplitude (Y) display.

You should be able to achieve a similar function using a VNA to produce the swept signal, and the SA to see the resultant frequency response, without having to trigger one from the other. But you will have to be careful to set appropriate sweep times on each device.

You will probably have to use separate devices because the RF and IF frequencies will be different from each other, but if you are trying to measure the IF response, around the same centre frequency, then it should be possible to do that just using a VNA.

Regards,

Martin
-- 

73

-Jim
NU0C

Re: Using TinySA and NanoVNA in RF

#19455

Thank you martin, just uploaded the original PDF to the thread.

Re: Using TinySA and NanoVNA in RF

#19454

Manual uploaded, 9&10 circuit description, 11&12 alignment.

Yaesu FRG7 hi res manual.pdf

Thanks for DFU-Buddy Software

#19453

Thanks to chri5k for adding DFU-Buddy to the files section.? I wasted about 20 minutes trying to get my windows machine to recognize my TinySA.? Windows wouldn't even recognize the SA or let me install the DFuse drivers.? Then I remembered seeing DFU-Buddy I had seen when I was browsing the files section.? I grabbed my Mac and installed the software (you do have to go into system settings and give permission to install the software) and the rest was easy.? Opened the software, found my TinySA, selected the dfu file I had downloaded and installed the firmware.? Done and dusted in way less time than I had fought with the PC.

?

Terry

Re: Analog detector output in Zero span mode #feature_request

#19452

Hi Erik

Thanks for reply regarding C85 - done :-)

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However, it does not work as expected :-(
There is a lot of noise and in some cases it seems like that an AGC increases the sensitivity when there is no signal.

Have made a test setup where the signal is generated by a signal generator with a 100% AM modulation.
The signal strength at tinaSA is approx. -46dBm
In parallel with tinaSA I have a simple diode detector.

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First test: Screen dump from tinaSA in Zero-span mode.
Here it is clearly seen that the signal changes between approx. -48dBm and < less than -100 dBm - as expected

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Second test - attached file: tinySA-ListenMode-50HzAM.pdf
Lots of noise on blue line (Listen signal from tinySA)

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Third test: - attached file: tinySA-ListenMode-1HzAM
Even more noise on blue line (Listen signal from tinySA)

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Have tried different settings of REF LEVEL, but it does not affect the signal on the Jack connector in Listen mode.

How to get more clean signal on Jack connector in Listen mode?

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Thanks in advance, Knud

tinySA-ZeroSpan-50Hz-AMmodulation.png

tinySA-ListenMode-50HzAM.pdf

tinySA-ListenMode-1HzAM.pdf

Re: Using TinySA and NanoVNA in RF

#19451

It is difficult to tell because part of the procedure is missing, and the resolution of the scanned page is not that good (Groups IO scales it).

?

At first glance, it looks like a voltage output, or some other trigger, from the swept oscillator time base, needs to be driving the scope X axis, to produce a frequency (X) vs amplitude (Y) display.

?

You should be able to achieve a similar function using a VNA to produce the swept signal, and the SA to see the resultant frequency response, without having to trigger one from the other. But you will have to be careful to set appropriate sweep times on each device.

?

You will probably have to use separate devices because the RF and IF frequencies will be different from each other, but if you are trying to measure the IF response, around the same centre frequency, then it should be possible to do that just using a VNA.

?

Regards,

?

Martin

Re: New FW release: Ext gating repaired

#19450

开云体育

Fine. Was this for TintSA app?

?

Mike N2MS

Show quoted text

On 02/14/2025 9:31 AM EST Erik Kaashoek <erik@...> wrote:

?

?

Please ignore.

Wrong group

--

Designer of the tinySA
For more info go to

Re: New FW release: Ext gating repaired

#19449

Please ignore.

Wrong group

--

Designer of the tinySA
For more info go to

Re: New FW release: Ext gating repaired

#19448

I wondered a few days ago about the other message, too.

What's this firmware for and where to find?

--

Klaus, DL5KV

Re: New FW release: Ext gating repaired

#19447

Erik,

I don;t see this release under

 Index of /tinySA4/DFU

The latest is

tinySA4_v1.4-196-g1e9c187.bin

Mike N2MS

Show quoted text

On 02/14/2025 7:41 AM EST Erik Kaashoek <erik@...> wrote:


New FW release
Version V0.1340

Changes:
- External gating working again.

External gating can only be activated using: Counter 1 using input A with gating from input B or counter 2 using input B with gating from input A.
Not all illegal configurations are yet block (using counter 1 with A gated by B and then select counter 2 to use input A)
--
Designer of the tinySA
For more info go to 

Using TinySA and NanoVNA in RF

#19445

Good day All.

I'm trying to restore/align an old FRG7 Com-radio, have a TinySA that have been using as an RF sig gen and a Zeewiie DSO1151g scope that 'should' run past 100Mhz, well lets just say 30Mhz is about its limit, this means I'm unable to look at signals in RF range.

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My question, attached are sample alignment procedures for the RFG-7.

Given that I dont have a fit-for-purpose scope (have three scope probes) but do have a TinySA and a NanoVNA (on the way) how should I then perform the alignements that require use of a scope, so what modifications do I make to testing and how should I review the results.

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Scopes, Im happy with using. SA and VNA interpretation, I'm not familiar with and no option to buy a higher bandwidth scope.

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Thank you.

Br John.

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Re: How to stop or abort an ongoing scan or scanraw command?

#19444

Hi Juan,

Erik added an 'abort' command? in V1.4165 (May2024) :

/g/tinysa/topic/106071963#msg16704?

Re: New FW release: Reduce spurs for ZS-407

#19442

Can you update the changelog please - it ends at 1.4-187

?

Thanks

How to stop or abort an ongoing scan or scanraw command?

#19441

Hello there,

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I am using the Tiny SA Ultra+ (ZS-406, firmware 1.4-196) and sending scan and scanraw commands to retrieve spectrum data, however I was wondering Is there any way to stop or abort an ongoing scan or scanraw command before it completes?

From my tests, it seems that once the command is sent, the device continues the process until completion. But in certain cases, I would like to interrupt the scan early (e.g., if the user cancels the operation in my application).

Thanks in advance!

Juan, M0WWA

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Re: New FW release: Reduce spurs for ZS-407

#19440

Do you have a question?

--

Designer of the tinySA
For more info go to

Re: New FW release: Reduce spurs for ZS-407

#19439

the level is different because the signal sources are not directly connected to the SA input, but were just near the connector.

two signal sources, one with a lower freq. the other with a higher.?

SPAN HP8592B 20mhz, and on tinySA 30mhz,

Show quoted text

On Tue, Feb 11, 2025, 9:45?AM hwalker via <herbwalker2476=[email protected]> wrote:

On Tue, Feb 11, 2025 at 12:24 AM, zeljko adzic wrote:

Question as regards ZS-407

why is it locked, is it? why can't we see how far it can go.

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See Wiki.

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?activates the expert configuration menu

HARMONIC?sets the harmonic to use in harmonic mode. Leave at 3 unless you absolutely need to be able to see higher frequencies

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Herb

23,4g edit.png

22,136g edit.png

22,138 hp.png

Re: New FW release: Capture repaired and meas[1|2]:volt added

#19438

thank you, all the spurs are gone, just in case I cleaned the cable contacts with alcohol.

ср, 12 февр. 2025 г., 12:22 Erik Kaashoek via <erik=[email protected]>:

Show quoted text

Is test 12 failing?

If so, you can try to reseat the LCD cable

--

Designer of the tinySA
For more info go to

Re: Analog detector output in Zero span mode #feature_request

#19437

Shorten C85 close to the audio connector

Or use the pin header pin marked PA4 for for 0-3 V output

--

Designer of the tinySA
For more info go to

Re: Analog detector output in Zero span mode #feature_request

#19436

Just received my ZS-407 - a very nice little instrument :-)
Seems like listening signal on 3,5mm jack is AC ??coupled?
Is it possible to change it to DC coupling, so that a constant RF level gives a constant DC voltage on the jack?