diff --git a/drv/b15f.cpp b/drv/b15f.cpp
index f5a68d4..a76e5a2 100644
--- a/drv/b15f.cpp
+++ b/drv/b15f.cpp
@@ -28,15 +28,17 @@ void B15F::init()
 	tcflush(usart, TCIFLUSH);
 	
 	std::cout << "OK" << std::endl;
-	
-	// verwerfe Daten, die µC noch hat
-	discard();
 
 	// Verbindungstest muss dreimal erfolgreich sein
 	std::cout << PRE << "Teste Verbindung... " << std::flush;
 	for(uint8_t i = 0; i < 3; i++)
+	{
+		// verwerfe Daten, die µC noch hat
+		discard();
+		
 		if(!testConnection())
 			throw DriverException("Verbindungstest fehlgeschlagen. Neueste Version im Einsatz?");
+	}
 	std::cout << "OK" << std::endl;
 
 
@@ -219,21 +221,20 @@ uint16_t B15F::analogeEingabe(uint8_t channel)
 	}
 }
 
-bool B15F::analogEingabeSequenz(uint16_t* buffer_a, uint16_t* buffer_b, uint32_t offset_a, uint32_t offset_b, uint16_t start, uint16_t delta, uint16_t count)
+bool B15F::analogEingabeSequenz(uint8_t channel_a, uint16_t* buffer_a, uint32_t offset_a, uint8_t channel_b, uint16_t* buffer_b, uint32_t offset_b, uint16_t start, int16_t delta, uint16_t count)
 {
 	try
 	{
-		writeByte(RQ_ADC_DAC_STROKE);		
+		writeByte(RQ_ADC_DAC_STROKE);
+		writeByte(channel_a);
+		writeByte(channel_b);
 		writeInt(start);
-		writeInt(delta);
+		writeInt(static_cast<uint16_t>(delta));
 		writeInt(count);		
 		uint8_t aw = readByte();
 		
 		if(aw != MSG_OK)
-		{
-			std::cout << "nein: " << (int) aw << std::endl;
 			throw DriverException("Mikrocontroller nicht synchronisiert");
-		}
 			
 		for(uint16_t i = 0; i < count; i++)
 		{
@@ -248,7 +249,7 @@ bool B15F::analogEingabeSequenz(uint16_t* buffer_a, uint16_t* buffer_b, uint32_t
 	catch(DriverException& de)
 	{
 		reconnect();
-		return analogEingabeSequenz(buffer_a, buffer_b, offset_a, offset_b, start, delta, count);
+		return analogEingabeSequenz(channel_a, buffer_a, offset_a, channel_b, buffer_b, offset_b, start, delta, count);
 	}
 }
 
diff --git a/drv/b15f.h b/drv/b15f.h
index 809b869..d2c187c 100644
--- a/drv/b15f.h
+++ b/drv/b15f.h
@@ -34,7 +34,7 @@ public:
 	bool analogeAusgabe0(uint16_t);
 	bool analogeAusgabe1(uint16_t);
 	uint16_t analogeEingabe(uint8_t);
-	bool analogEingabeSequenz(uint16_t*, uint16_t*, uint32_t, uint32_t, uint16_t, uint16_t, uint16_t);
+	bool analogEingabeSequenz(uint8_t channel_a, uint16_t* buffer_a, uint32_t offset_a, uint8_t channel_b, uint16_t* buffer_b, uint32_t offset_b, uint16_t start, int16_t delta, uint16_t count);
 	
 	// Serielle Verbindung
 	inline void writeByte(uint8_t);
diff --git a/drv/b15f.o b/drv/b15f.o
index 3342308..fd40214 100644
Binary files a/drv/b15f.o and b/drv/b15f.o differ
diff --git a/main b/main
index 8884305..9f0ce44 100755
Binary files a/main and b/main differ
diff --git a/main.cpp b/main.cpp
index d1e47cf..7be05dc 100644
--- a/main.cpp
+++ b/main.cpp
@@ -19,7 +19,7 @@ int main()
 	
 	uint16_t ba[1024];
 	uint16_t bb[1024];
-	drv.analogEingabeSequenz(&ba[0], &bb[0], 0, 0, 0, 10, 100);
+	drv.analogEingabeSequenz(1, &ba[0], 0, 0, &bb[0], 0, 1000, -10, 101);
 	
 	std::cout << "Schluss." << std::endl;
 }
diff --git a/main.o b/main.o
index d8d54c6..a000f65 100644
Binary files a/main.o and b/main.o differ