since i am using Microsoft VB to make my interface, so i am using "170" as synchronize signal, "0" as address bit, "0~9" data bit which run certain function. that's why i need to perform the "match" , to read the "0" address bit, which is similar as connect PORT B to ground.
after i send the RF signal, the receiver size will receive and decode the signal to 4 parallel data to PIC16F84A RA0~3, then it will control the movement according to the data receive........