diff --git a/cubesatsim/cubesatsim.h b/cubesatsim/cubesatsim.h
index 215b91f7..3e6f1e8a 100644
--- a/cubesatsim/cubesatsim.h
+++ b/cubesatsim/cubesatsim.h
@@ -129,7 +129,9 @@ void eeprom_word_write(int addr, int val);
 void read_payload();
 void start_ina219();
 void pwm_interrupt_handler();
-void start_pwm() ;
+void start_pwm();
+void transmit_on(); 
+void transmit_off(); 
 
 extern int Encode_8b10b[][256];
 
@@ -142,8 +144,8 @@ int testCount = 0;
 long time_start;
 //char cmdbuffer[1000];
 //FILE * file1;//
-#define BUFFER_SIZE  (2^15)
-short int buffer[50000]; //BUFFER_SIZE]; // ctr is an int // 100000]; // 50000]; // 25000]; // 10240]; // was 2336400]; // max size for 10 frames count of BPSK
+#define BUFFER_SIZE  (970 * 2)
+short int buffer[BUFFER_SIZE]; // 50000]; //BUFFER_SIZE]; // ctr is an int // 100000]; // 50000]; // 25000]; // 10240]; // was 2336400]; // max size for 10 frames count of BPSK
 //short int buffer[(WAV_DATA_LENGTH/8)];
 //FILE *sopen(const char *program);