Radiometrix RX2A and TX2A

Okay so we are looking to send packet data using a Radiometrix transmitter and receiver. However, to begin with we are just trying to send an arbitrary data string. Bellow I have copied in the code I have written for the transmitter, however I have no idea how to test if this is working and no idea what the code should be like for the receiver. I just put in a serial print to display when it was sending high or low. I am completely a beginner with these radios so any help with these would be greatly appreciated.

Cheers

#define RADIOPIN 9

String datastring;

void setup() {
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
}

void loop() {

datastring = String(“226.33,323.45”);
rtty_txstring (datastring);
delay(5000);
}

void rtty_txstring (String) {

char a;
int j=0;

while (j<13){
a = datastring[j];
rtty_txbyte(a);
j++;
Serial.print(’\t’);
}
Serial.println();
}

void rtty_txbyte(char a){

int k=0;

//start bit
rtty_txbit(0);

//send bits for character LSB first
for(k=0;k<8;k++){

if (a & 1) rtty_txbit(1);
else rtty_txbit(0);
a = a >> 1;
}

//stop bits
rtty_txbit(1);
}

void rtty_txbit(int bit) {
if (bit){
//High
Serial.print(1);
analogWrite(RADIOPIN,110);
}
else{
//Low
Serial.print(0);
analogWrite(RADIOPIN,100);
}
}

amateur radio users have done similar http://www.rtty.com/