Problem receiving signal from Zigbee

I am trying to transmit the sensor signal to PC 100 m apart using Zigbee XB24. The receiving PC is connected to Zigbee module using USB. When i check the communication between the Zigbees using PC in transmitter side, it was transmitting properly (Whatever I typed in transmitting PC, I received in receving PC).

However, when i disconnect PC from transmitter side, the terminal in receiving PC shows some junk value as attached in the picture below. When I connect the sensor output(+-10 V) to ADC of transmitter, the terminal of receiving side is showing the same junk values along with some numerical value as well...For e.g. if a value in sensor is 23.4 then the terminal shows "........K~......2...........K~.........3......... ..4........K~.........". How to get the correct value in the receiving side. Please help.....