Apologies for this late reply. I got the flu over the weekend and just got back to the office today.
Anyway, I managed to speak to our engineers and was told that you should be able to keep the transmitter and source close together. I've tried to search for this statement "keep transmitter and source at least 20 cm far apart" in our instruction manual but to no avail.
As for your last query, you do not need to turn off your source before connecting your transmitter.
I have couple of questions though. User manual says that we should keep transmitter and source at least 20 cm far apart. How to deal with situation when I go outside and I want to listen music from my phone. My plan was to put them into same pocket. Would that decrease SQ or have some other negative implications? Secondly, user manual says that source has to be off before we connect transmitter. Is it an absolute must because it can be very annoying to constantly turn my computer off and on when I want to listen something from it. Would it be enough that at the moment of connecting transmitter I don't have anything actually playing on the computer.
Thank you in advance!