diff --git a/specwidget.cpp b/specwidget.cpp
index f04ac2914415cdfb08e6916843ef015612132720..f4418b5c45a9446bb98668b6da2b60eb06c0ac97 100644
--- a/specwidget.cpp
+++ b/specwidget.cpp
@@ -382,6 +382,7 @@ void specWidget::initTx()
 		run_TxIO();
 	});
 
+	m_dataproduce_ok = false;
 	read_count = m_rx_bufsz/2;
 	m_tx_points = 0;
 	//读取文件
@@ -438,14 +439,20 @@ void specWidget::initTx()
 				}
 			}
 			else
+			{
+				if (!m_dataproduce_ok)
+					m_dataproduce_ok = true;
 				QThread::msleep(10);
+			}
 		}
 		if (fIn.isOpen())
 			fIn.close();
 	});
 
-	m_txth->start();
 	m_readth->start();
+	while (!m_dataproduce_ok && ! stop_signal_called)
+		QThread::msleep(10);
+	m_txth->start();
 }
 
 
diff --git a/specwidget.h b/specwidget.h
index 8e15a5ca593829887ccc6265b05421273b6a58dd..773e549243dab15794ee6ddab37dc2b7a57e76be 100644
--- a/specwidget.h
+++ b/specwidget.h
@@ -110,6 +110,7 @@ private:
 	unsigned long long read_count;
 	std::atomic<bool> m_bSaveToFile;
 	std::atomic<bool> m_bPlayFromFile;
+	std::atomic<bool> m_dataproduce_ok;
 	QString m_strFolder;
 	QString m_strFolderPlay;
 	//stdout reader