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hi guys - having problem during self-test "Test 3" failed and stops from there

Did you connect the CAL and RF connectors with a short coax?
Post a photo of the failing self test
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yes - connect sma cable for both hi-lo ports - this is the latest test i made ..

TY

Can you first do a level calibration and then run the test again?
If the level calibration fails, post a photo of the fail message
Make sure the test on the screen is readable
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Hi Erik,

Pls see CAL test made just now. FW 1.3-512

Can you try another coax cable as there is something wrong with the signal level
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Erik Hi,
I have the same issue. I followed the instructions and got a message in this test that the signal level was incorrect. The same result was received with the three different cables.


Thanks
Amir

config / more / clear config (1234)

make calibration, and then;
selftest...

good, if You use the latest firmware...



Istvan

Thanks,?

I have done as suggested, but I still have the same result.
A bit of background:
When I got the device, I ran the self-test and failed test 3, and the testing stopped there. I then realized I was using an old version of the FW so I did try updating the FW without success. I then had to replace the MC, and following the MC replacement, I updated the FW to the latest 1.4132.
Today, I tried the self-test, and it failed again at test 3 and stopped.
Trying to run the level cal "signal level incorrect check cable between connectors" .
I did try 3 different cables.

Thanks
Amir

You did replaced the microcontroller?? Why?
The 1.4-133 is the latest...

Istvan

Can you connect the cal output to a scope and enable the cal output and see if there is some output.
When you connect the antenna to the RF input, do you see some transmitters?
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I did replace the MC because it was not upgrading FW.

Hi,
Attached is an image of the scope capture.

Also, please see the image of the High side as input, and the low side shows no radio signal input...
Any ideas?

Can you posts capture of the low input, full range, with the antenna connected?
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Hi,
This image is produced while I am broadcasting at 169 MHz near the TinySa (40cm).
The second image shows the same broadcaster (TI launchpad Kit) broadcasting and at 429MHz with an antenna on the high side.
It feels that something is wrong with the low side ...

What next?
Amir

To compare levels you better use a cable connection with adequate attenuation
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On Thu, Dec 28, 2023 at 10:02 AM, Erik Kaashoek wrote:

To compare levels you better use a cable connection with adequate attenuation

Erik,
? The user's last photo shows a noise floor of -90dBm, and no FM signals detected, with an antenna attached to the low port.? In addition to failing self-test 3, wouldn't that indicate probable front-end damage to the low input - most likely the input attenuator?? The antenna connection should rule out the likelihood of a bad input cable.?

Herb

Ah, Herb
Yes, thanks
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Hi,
Sorry, what can I do to fix the device?

BR,
Amir

You may have blown the attenuator
?See wiki FAQ on what to repair
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