ADF7020 TEMPARATURE SENSOR WORKING

Hi,

 I am new to the ADF7020 RF module. I am testing the board by checking to get the temparature sensor in the module.

I write "0x000007F8" to the register 8 to set the ADC ENABLE bit then I write "0x00000167" to register 7 to readback the temparature sensor value. But I didn't got the output. Please tell me briefly how to get the temparature sensor value. I saw that I have to enable the TX mode but I don't know how to. Please help its urgent!