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Re: 5.8GHz wideband video signal measurements

 

On Thu, Sep 19, 2024 at 02:39 AM, @glradio wrote:
It would be good if the seller who intervened in this post would also make them available for purchase on Aliexpress where shipping costs are saved ...
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Herb
Re: 5.8GHz wideband video signal measurements

 

On Thu, Sep 19, 2024 at 08:29 AM, i2NDT Claudio wrote:
I found them here:
It would be good if the seller who intervened in this post would also make them available for purchase on Aliexpress where shipping costs are saved ...
Re: 5.8GHz wideband video signal measurements

 

EUREKA!
I found them here:
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i2NDT Claudio
Re: amplitude changes with span

 

Not only are the input levels too high, but with the closely spaced additional signal, you are dragging more noise into the measurement.

Dave - W?LEV


On Wed, Sep 18, 2024 at 8:20?AM John Cunliffe W7ZQ via <w7zq=[email protected]> wrote:
One part I see from the start is that your input levels are way to high to do this reliably. Reduce your input to a max of -25dbm and try again. 2 input signals this close with a lvl this high will cause problems.
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John



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Dave - W?LEV
Re: 5.8GHz wideband video signal measurements

 

On Wed, Sep 4, 2024 at 04:39 AM, Hugen wrote:
Aliexpress store
LNA Zeenko UM Series
https://www.aliexpress.com/item/3256807470712797.html
LNA Zeenko BM Series
These LNAs are visible on the home page of (see photo below), but clicking on them gives an error.
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Does anyone have an explanation ?
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Re: amplitude changes with span

 

One part I see from the start is that your input levels are way to high to do this reliably. Reduce your input to a max of -25dbm and try again. 2 input signals this close with a lvl this high will cause problems.
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John
Re: amplitude changes with span

 

First try to reduce the input level to below -15dBm so the internal attenuator does not go to max attenuation
See if this solves the problem
--
Designer of the tinySA
For more info go to

amplitude changes with span

 

When span is reduced from 100kHz to 10 kHz, the amplitude of Marker 1 changes fr -6 dBm (graph below, top half) to -9 dBm (bottom).
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How can I eliminate / minimize this discrepancy?
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This discrepancy arises only when there are two tones, F1 and F2; i.e. IMD testing. When the other tone F2 is switched off, the discrepancy disappears; i.e. the displayed amplitude value returns to the correct value of - 6 dBm (graph below).
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73,
Chin-Leong Lim, 9W2LC.
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Re: Request over WAIT command when used in CMD.files (SD_card)#ULTRA

 

I think the problem could be solved if the trace could continue to be updated while waiting.
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Toni
Re: Request over WAIT command when used in CMD.files (SD_card)#ULTRA

 

Thank you Erik for answering so quickly.

?NOTE: Before running the program set the AUTONAME to ON to avoid the alphanumeric keypad.

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Try this program:?

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sweep 468M 480M 290

marker 1 471.25M

marker 2 476.75M

wait 5

remark save capture

menu 9 6

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sweep center 490M

marker 1 490M

wait 5

remark save capture

menu 9 6

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When sending this file from the console, the captures are correct. When running from SD_card, the trace of screenshots are from the screen before the run.

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Toni
Re: Request over WAIT command when used in CMD.files (SD_card)#ULTRA

 

Toni
From the updated wiki:
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wait? ? wait for a single sweep to finish and pauses sweep or waits for specified number of seconds
? ? ? ? usage: wait [{seconds}]
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So its is expected to wait in a command file. Is it behaving differently?
--
Designer of the tinySA
For more info go to

Re: Noise Source Recommendation, low cost

 

One? more thing.
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What is the power source. Battery (18650?) lets you carry both the generator and SA.
Request over WAIT command when used in CMD.files (SD_card)#ULTRA

 

Erik, Would it be possible that the WAIT command when used in a CMD file executable from SD_card would stop reading (or running) the following commands from the CMD file for the defined wait time?.
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Greetings and long life,
Toni
Re: What to do when a selftest fails

 

We do not share component data except for the lna and the input switch
If you had received a bad tinySA you should contact your supplier?
--
Designer of the tinySA
For more info go to

Re: What to do when a selftest fails

 

greetings, will someone finally answer me what is the value or catalog number of inductance L12?? is it TinySA v.03_e?
Re: What to do when a selftest fails

 

Hi Erik,

Sure will do thanks for taking the time to look into this issue.

Regards
Simon

On Mon, 16 Sept 2024 at 20:25, Erik Kaashoek via <erik=[email protected]> wrote:
Blown switch or LNA are very rare compared to total tinySA being sold.
But if zelftest succeeded before upgrade and failed after upgrade it may be something else
Can you contact Eleshop for sending the faulty device back to them so I can investigate what is happening?
Tell them I requested you to send back
--
Designer of the tinySA
For more info go to



--
Best Regards
Simon
----
Re: 'USB interface' wiki - I need help

 

Ric,
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actual_freq

??????????????? Classic#: sets or dump the frequency correction set by CORRECT FREQUENCY menu

??????????????? usage: actual_freq [{frequency}]

??????????????? Ultra#: sets or dump the frequency after correction set by? FREQ CORR menu (3x)

??????????????? usage: actual_freq [{3000000000+(3x value p.p.m.)}]

color

sets or dumps the colors used?
usage: color [{id} {rgb24}]

see message #8500 [email protected] | Search
Re: What to do when a selftest fails

 

Blown switch or LNA are very rare compared to total tinySA being sold.
But if zelftest succeeded before upgrade and failed after upgrade it may be something else
Can you contact Eleshop for sending the faulty device back to them so I can investigate what is happening?
Tell them I requested you to send back
--
Designer of the tinySA
For more info go to

Re: What to do when a selftest fails

 

Hi Erik,

Yes the calibration (and self test) actually worked fine prior to FW upgrade. The only reason I actually upgraded the firmware was that a colleague had also the same issue after upgrading and I wanted to check. So in order to try and help him, I upgraded the firmware to same version he had. This is when the issues started. Downgrading firmware has no effect and the problem remains..

If it's a blown switch and LNA are these user replaceable parts, and how likely is it to happen again ? Are parts available in NL and what are part numbers ? I have actually recommended all our field engineers get a tinySA ultra and if it's a common problem, then I may need a lot of spare parts ;)

Regards Simon
Re: What to do when a selftest fails

 

You may have blown the input switch and possibly the LNA
Did you ever do a level calibration and/or selftest before updating to the new FW?
--
Designer of the tinySA
For more info go to

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