diff --git a/640.md b/640.md
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--- a/640.md
+++ b/640.md
@@ -184,7 +184,7 @@ There is a polarity protection mosfet on the 640 board to protect the motor driv
 
 The RC receiver is connected to the 3-pin connector on the far left of the board. Your Radio Control (RC) receiver should be capable of outputting CPPM or PPM-SUM signals. For some RC receivers need a jumper placed across two pins in order to enable this mode (as is the case with the D4R-II receiver displayed).
 
-Once you have your RC receiver connected to the board and bound (linked) to yur RC transmitter, you should run the C++ PPM decoder example code ([below](#programming-the-640-installing-the-c-libraries-examples)) to make sure that hte signals are being received correctly.
+Once you have your RC receiver connected to the board and bound (linked) to yur RC transmitter, you should run the C++ PPM decoder example code ([below](#programming-the-640-installing-the-c-libraries-examples)) to make sure that the signals are being received correctly.
 
 ![640 RC receiver](/images/rc640.png)
 
diff --git a/images/rc640.png b/images/rc640.png
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Binary files a/images/rc640.png and b/images/rc640.png differ