BATC Forum

If you are the proud owner of a new LimeSDR Mini, please think about these points before you use it:

• It is very easy to accidentally break the USB Connector off the board. We recommend using a case or mounting the PCB on a baseplate with spacers and then providing some strain relief for the USB lead.
• The LimeSDR Mini performs a calibration routine before transmitting on each over. During this routine it transmits out of band at high power levels. Make sure that you do not energise your PA until after the calibration is finished. The Portsdown PTT lines are delayed to take account of this, but the DATV Express PTT line is not.
• When you update the firmware on your LimeSDR Mini, you may need to disconnect it from your Portsdown and reconnect it after the update is complete to ensure correct operation. This problem is under investigation.
• Remember that you need to use a powered USB hub between the Portsdown and the LimeSDR Mini. I use a USB2 hub for testing; USB1 hubs do not work, and USB3 hubs can cause driver issues (but may work for you).

I will try to keep this list updated as we learn more.

Dave, G8GKQ

As we learn more about the LimeSDR Mini, I am posting more information on the Wiki and providing extra links here:

Using LimeSDR with Portsdown: https://wiki.batc.org.uk/Using_LimeSDR_with_Portsdown

BATC-provided LimeSDR Mini information: https://wiki.batc.org.uk/LimeSDR_Mini_Information

LimeSDR Mini Output Power Levels: https://wiki.batc.org.uk/LimeSDR_Mini_O ... wer_Levels (Corrected Link)

Dave, G8GKQ

Hi,
I am in the process of completing my Portsdown 4 tv tx, using an limesdr mini 2. V 2.4,
Does the info in this post relate to this version of the limesdr mini.
Especially in respect of power output.
Many thanks
Chris

Hi Chris

The power ouutput of a LimeSDR Mini V2.* is very similar to that of a LimeSDR Mini V1.*, so the 3rd link is pretty good.

The first link is broadly accurate, but the second link ONLY applies to the LimeSDR Mini V1.*, not the V2.*

Dave, G8GKQ

Many thanks, keep an eye out for smoke