For the last couple weeks my 625 will freeze the picture. This happens about every 45 minutes or so. It will last for about 30 – 45 seconds. Then unfreeze the picture and go to live picture. I’ve check the signal strength while this is happening it is always around 92 or better. I’ve done a switch check and it’s all good. I also have two 211 receivers and this does not happen with them only the 625. I called tech support, their response was just to keep a log and if it continues call them back. Any ideas?