Testing the 4 rtl- sdrs

Discuss KerberosSDR - 4x Coherent RTL-SDR
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sudip
Posts: 4
Joined: Thu Apr 18, 2019 2:57 pm

Testing the 4 rtl- sdrs

Post by sudip » Sun Apr 21, 2019 12:41 pm

I have installed under Ubuntu 18.04 followed the steps as described under 'Installing the software on a PC/Other SBC'

Then, to test each rtl-sdrs

I switched ON the 1st DIP lever the rest OFF

Typed rtl_test -d 0 and I got the message as below:

rtl_test -t -d 0
Found 1 device(s):
0: Generic, RTL2832U, SN: 77771111153705700

Using device 0: Generic RTL2832U
Found Rafael Micro R820T tuner
Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6
[R82XX] PLL not locked!
Sampling at 2048000 S/s.
No E4000 tuner found, aborting.

So, -d 0 okay

Now, switched OFF the DIP and ON the 2nd DIP

Typed rtl_test -d 1 and I got the message as below:

tl_test -t -d 1
Found 1 device(s):
0: Generic, RTL2832U, SN: 77771111153705700

No matching devices found.

And so on and so forth for the device 2 and 3 but got the same above message.

My question is everything normal and fine to move ahead?

Please help me

Regards,

Sudip Kar

rtlsdrblog
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Re: Testing the 4 rtl- sdrs

Post by rtlsdrblog » Mon Apr 22, 2019 1:48 am

That's expected, because when you have only one SDR on, the device index will always be zero.

I would test like this:

Turn on SDR on, and test with -d 0
Turn the second one on, and test with -d 1
Turn the third one on, and test with -d 2
Turn the fourth one on and test with -d 3.

Don't turn the previous ones off when testing.

Finally, turn them all on, open four terminals and run rtl_test in each one. If they all run without errors, then you can be confident that the USB cable you're using is of good quality, and that the unit is functioning normally.

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kb3cs
Posts: 31
Joined: Thu Apr 04, 2019 2:15 pm

Re: Testing the 4 rtl- sdrs

Post by kb3cs » Mon Apr 22, 2019 12:41 pm

"-d 0" means use the first device detected

since you were only turning on one device, the one device that is on is the first device detected.

sudip
Posts: 4
Joined: Thu Apr 18, 2019 2:57 pm

Re: Testing the 4 rtl- sdrs

Post by sudip » Mon Apr 22, 2019 4:53 pm

Thanks a lot.... its working ....

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