added extended comment to PS off/on when tuning

diff --git a/radio.c b/radio.c
index 671a36448700fa4d793f4d8c3b7e91b86503e121..c84779fed202c66a74f71711b96ac250d9a4bb11 100644 (file)
--- a/radio.c
+++ b/radio.c
@@ -1383,7 +1383,19 @@ void setTune(int state) {
     if(state) {
       if (transmitter->puresignal) {
        //
-       //    Reset PS engine
+       // DL1YCF:
+       // Some users have reported that especially when having
+       // very long (10 hours) operating times with PS, hitting
+       // the "TUNE" button makes the PS algorithm crazy, such that
+       // it produces a very broad line spectrum. Experimentally, it
+       // has been observed that this can be avoided by hitting
+       // "Off" in the PS menu before hitting "TUNE", and hitting
+       // "Restart" in the PS menu when tuning is complete.
+       //
+       // It is therefore suggested to to so implicitly when PS
+       // is enabled.
+       //
+       // So before start tuning: Reset PS engine
        //
         SetPSControl(transmitter->id, 1, 0, 0, 0);
        usleep(50000);
@@ -1474,7 +1486,9 @@ void setTune(int state) {
       }
       if (transmitter->puresignal) {
        //
-       //    Resume PS
+       // DL1YCF:
+       // Since we have done a "PS reset" when we started tuning,
+       // resume PS engine now.
        //
        SetPSControl(transmitter->id, 0, 0, 1, 0);
       }