LimeSdr mini test DVB-T 8Mhz


#1

Dear All. Just received my miniLimeSDR board.

I tried with the software datv express to trasmitt in dvb-t @ 538Mhz with 8 Mhz bandwidth only for testing purpose.

Accordingly to use the USB 3.0

I used the key pctv292e to receive the signal with the software sambuddy (https://www.dtvtools.com/wp-content/uploads/sambuddy_rf_home.png) and evaluate the constellazion but no signal is received and the software don’t track the signal

With a analog receiver a I tried to tune@ 538 Mhz and the carrier is present but I don’t know if error was present .

I also tried with 7mhz bandwidth but nothing .

I doubt if the board arises in DVB-T 7Mhz band …

someone made attempts or the board is capable also 2Mhz band in dvb-t ?

Waiting for reply

Regards
Nunzio


#2

@DaveG8GKQ or @f5oeo could be good people to ask.


#3

This is one for @g4guo . Not sure of the DVB-T capabilities of his DATV Express software with a LimeSDR Mini.


#4

Hello , I installed GnuRadio 3.7.13.4 on Ubuntu 18.04 LTS and LIMESDR package without problem.

I just loaded the file example LimeSDR_USB_DVB_T_Demo_2k.py’

But when start the flow appear the error below :

Generating: ‘/home/sam/Scrivania/gr-limesdr/examples/LimeSDR_USB_DVB_T_Demo_2k.py’

Executing: /usr/bin/python -u /home/sam/Scrivania/gr-limesdr/examples/LimeSDR_USB_DVB_T_Demo_2k.py

Warning: failed to XInitThreads()
Traceback (most recent call last):
File “/home/sam/Scrivania/gr-limesdr/examples/LimeSDR_USB_DVB_T_Demo_2k.py”, line 219, in
main()
File “/home/sam/Scrivania/gr-limesdr/examples/LimeSDR_USB_DVB_T_Demo_2k.py”, line 207, in main
tb = top_block_cls()
File “/home/sam/Scrivania/gr-limesdr/examples/LimeSDR_USB_DVB_T_Demo_2k.py”, line 120, in init
self.lime = limesdr.sink(‘1D423E44F4800C’,
AttributeError: ‘module’ object has no attribute ‘sink’

Done


#5

This is similar to a thread on the BATC forum about Lime Mini and high symbol rates. It works on some P.Cs but not on others probably down to the PCs USB3 performance. Here is proof that it does work (at least on my PC).

  • Charles

#6

The LimeSDR Digital Amateur TV topic in the BATC Forum is here: https://forum.batc.org.uk/viewforum.php?f=120

The thread that @g4guo is referring to is this one: https://forum.batc.org.uk/viewtopic.php?f=120&t=5856

Dave


#7

Indeed, some PC USB 3.0 chipsets seems to perform better than others. The cable used can also have an effect if it causes too much of a voltage drop.