1 files changed, 4 insertions, 2 deletions
diff --git a/sdr_lib/dsp_core_tx.v b/sdr_lib/dsp_core_tx.v
index 535f2003e..54889fa2a 100644
--- a/sdr_lib/dsp_core_tx.v
+++ b/sdr_lib/dsp_core_tx.v
@@ -58,11 +58,13 @@ module dsp_core_tx
    always @(posedge clk) strobe_hb2 <= strobe_hb2_pre;
    always @(posedge clk) strobe_cic <= strobe_cic_pre;
 
-   // DDC
+   // NCO
    always @(posedge clk)
      if(rst)
        phase <= 0;
-     else if(run)
+     else if(~run)
+       phase <= 0;
+     else
        phase <= phase + phase_inc;
    
    wire        signed [17:0] da, db;