diff --git a/prod/doc/Makefile b/prod/doc/Makefile
index 3937429..3b0054d 100644
--- a/prod/doc/Makefile
+++ b/prod/doc/Makefile
@@ -5,7 +5,7 @@ GENERATED=index.html setup.html flash.html test.html analysis.html \
 	  atben-A-small.png atusb-A-small.png \
 	  atben-B-small.png atusb-B-small.png \
 	  atrf-path-small.png
-ORIGINAL=atben-clkm.png atusb-clkm.png atusb-clk.png
+ORIGINAL=scope-atben-clkm.png scope-atusb-clkm.png scope-atusb-clk.png
 
 DL=http://downloads.qi-hardware.com/people/werner/wpan/tmp
 
diff --git a/prod/doc/analysis.hmac b/prod/doc/analysis.hmac
index 9234572..a7459f4 100644
--- a/prod/doc/analysis.hmac
+++ b/prod/doc/analysis.hmac
@@ -177,7 +177,7 @@ the right:
 <P>
 <A href="atben-A.png"><IMG src="atben-A-small.png" align="left"></A>
 &nbsp;
-<IMG src="atben-clkm.png">
+<IMG src="scope-atben-clkm.png">
 <P>
 <TABLE frame="border" cellpadding="2">
 <TR><TH align="left">Clock<TH align="left">Action
@@ -207,9 +207,9 @@ a low-pass filter (CLK):
 <P>
 <A href="atusb-A.png"><IMG src="atusb-A-small.png"></A>
 &nbsp;
-<IMG src="atusb-clkm.png">
+<IMG src="scope-atusb-clkm.png">
 &nbsp;
-<IMG src="atusb-clk.png">
+<IMG src="scope-atusb-clk.png">
 <P>
 The left screen shot shows the clock (CLKM) before the low-pass filter
 while the right screen shows the clock (CLK) after the the low-pass
diff --git a/prod/doc/atben-clkm.png b/prod/doc/scope-atben-clkm.png
similarity index 100%
rename from prod/doc/atben-clkm.png
rename to prod/doc/scope-atben-clkm.png
diff --git a/prod/doc/atusb-clk.png b/prod/doc/scope-atusb-clk.png
similarity index 100%
rename from prod/doc/atusb-clk.png
rename to prod/doc/scope-atusb-clk.png
diff --git a/prod/doc/atusb-clkm.png b/prod/doc/scope-atusb-clkm.png
similarity index 100%
rename from prod/doc/atusb-clkm.png
rename to prod/doc/scope-atusb-clkm.png