Is this for Trimble Access, Survey Controller or Trimble Site Pulse - or for some other application for TSC7. If for the Geospatial Products you should post the question on the Geospatial Forum because their specialists will be reviewing those questions - I apologize but I cannot talk to what they need in terms of format or why this may fail to work for you. If you are asking about Site Pulse - then I will try to assist you, but I will likely need one of the Images that you are trying to use. I know that Site Pulse has some limits on the size of the Image that you can use - and I can find out the details for you.
Thanks for helping me with some more details
Alan