PPM value is used even if NTP has not yet locked.

Theory being that the unlocked PPM value is still likely better than no
PPM value.

README

@@ -203,6 +203,9 @@ Credits:
   is more precise and does not vary based on system load or PWM clock
   frequency.
 
+  Michael Tatarinov for adding a patch to get PPM info directly from the
+  kernel.
+
   [1] PiFM code from
       http://www.icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter
   [2] Original WSPR Pi transmitter code by Dan:

wspr.cpp

@@ -921,8 +921,8 @@ void update_ppm(
   status = ntp_adjtime(&ntx);
 
   if (status != TIME_OK) {
-    cerr << "Error: clock not synchronized" << endl;
-    return;
+    //cerr << "Error: clock not synchronized" << endl;
+    //return;
   }
 
   ppm_new = (double)ntx.freq/(double)(1 << 16); /* frequency scale */