So the TX (transmit) and RX (receive) counters are low level indicators of what the connected electronic hardware is doing. In the case of the SV-GPS-250/2020, you'll ALWAYS see the RX counter increasing when it's working. This is because the GPS is continuously transmitting its position, over and over, for SkyView to process. From your description, we should probably have our support team work with you to fully understand what you're seeing. Give them a call at 425-402-0433 so that they can help you troubleshoot further.