Disable "IQ scaling" for HermesLiteII when doing PURESIGNAL

diff --git a/old_protocol.c b/old_protocol.c
index 16f001cab01abff3e05593976bdf968b06baa19b..d5cf7c95c939e9a7174fe37fc5b1ad8f28e393f5 100644 (file)
--- a/old_protocol.c
+++ b/old_protocol.c
@@ -1541,6 +1541,9 @@ void ozy_send_buffer() {
             //       generated in the FPGA. A typical symptom is that the CW signals are
             //       stronger than the "TUNE" signal, and in the case of very low drive slider
             //       values they can be *much* stronger.
+           //
+           // NOTE: When using predistortion (PURESIGNAL), the IQ scaling must be switched off.
+           //       In this case, the output  power can also be stronger than intended.
             //
             if (power > 0) {
               int hl2power = 15+(int)lround(ceil(40.0 * log10((double) power / 255.0)));

diff --git a/transmitter.c b/transmitter.c
index 55dfae5f016390225301894dda8209cefad941b8..7e89244c4cc31c75b5d0ae98f597f575e49272ce 100644 (file)
--- a/transmitter.c
+++ b/transmitter.c
@@ -1245,7 +1245,7 @@ static void full_tx_buffer(TRANSMITTER *tx) {
         gain=gain*(double)tx->drive_level*0.00392;
       }
     }
-    if (protocol == ORIGINAL_PROTOCOL && radio->device == DEVICE_HERMES_LITE2) {
+    if (protocol == ORIGINAL_PROTOCOL && radio->device == DEVICE_HERMES_LITE2 && !transmitter->puresignal) {
       //
       // The HermesLite2 is built around the AD9866 modem chip. The TX level can
       // be adjusted from 0.0 to -7.5 dB in 0.5 db steps, and these settings are
@@ -1257,6 +1257,9 @@ static void full_tx_buffer(TRANSMITTER *tx) {
       // However, if the drive level requires an attenuation *much* larger than
       // 7.5 dB we have to damp significantly at this place, which may affect IMD.
       //
+      // NOTE: When doing adaptive pre-distortion (PURESIGNAL), IQ scaling cannot
+      //       be used.
+      //
       int power;
       double f,g;
       if(tune && !tx->tune_use_drive) {