One of the main advantages spread spectrum communication system is ability to transmit data information with a unique codes and certain receiving device can detected only. More method of generating a unique code in the spread spectrum that one called as direct sequences. Application of this method is especially realized to CDMA technology due it simplicity design and easy to analyze characteristics related with distribution of unique codes on a radio transmission bandwidth. The original of this source code came from random data who generated by a pseudo noise or pseudo noise generator through controlling has code length of 16 with frequency stability generator are 15.020 kHz and carrier frequencies are 499.9419 kHz where both of these produces a value of 0.0412% percent error for clock frequency pseudo noise and 0.000049% percent error for carrier frequency stability and effect of this method is still good to implemented on CDMA technology low data rate.