diff --git a/ch32v/ch32v003-adcrx/adcrx.c b/ch32v/ch32v003-adcrx/adcrx.c
index 8a6fd8f..e59bfed 100644
--- a/ch32v/ch32v003-adcrx/adcrx.c
+++ b/ch32v/ch32v003-adcrx/adcrx.c
@@ -226,7 +226,7 @@ void InnerLoop()
 			if( adc == adc_buffer_top ) adc = adc_buffer;
 		}
 
-		if( frcnt > 2000 )
+		if( frcnt > 8000 )
 		{
 			int ti = i>>2;
 			int tq = q>>2;