diff --git a/Documentation/DeveloperInfo/USB_protocol_v12.pdf b/Documentation/DeveloperInfo/USB_protocol_v12.pdf
index 38c1508..a765f10 100644
Binary files a/Documentation/DeveloperInfo/USB_protocol_v12.pdf and b/Documentation/DeveloperInfo/USB_protocol_v12.pdf differ
diff --git a/Documentation/DeveloperInfo/USB_protocol_v12.tex b/Documentation/DeveloperInfo/USB_protocol_v12.tex
index ce9732f..a4757cd 100644
--- a/Documentation/DeveloperInfo/USB_protocol_v12.tex
+++ b/Documentation/DeveloperInfo/USB_protocol_v12.tex
@@ -779,13 +779,13 @@ The packet contains the following fields:
 \end{longtable}   
 \end{ThreePartTable}
 
-\subsection{Nack}
+\subsection{RequestDeviceInfo}
 This packet is used to make the device send the DeviceInfo packet. It has no payload.
 
 \subsection{RequestSourceCal}
 This packet is used to make the device send the source amplitude calibration. It has no payload. For each source amplitude calibration point one SourceCalPoint packet will be returned.
 
-\subsection{RequestSourceCal}
+\subsection{RequestReceiverCal}
 This packet is used to make the device send the receiver amplitude calibration. It has no payload. For each receiver amplitude calibration point one ReceiverCalPoint packet will be returned.
 
 \subsection{SourceCalPoint}