diff --git a/Makefile.linux b/Makefile.linux
index 97664a7..2b4e42e 100644
--- a/Makefile.linux
+++ b/Makefile.linux
@@ -510,16 +510,17 @@ install : $(APPS) direwolf.conf tocalls.txt symbols-new.txt symbolsX.txt dw-icon
 	$(INSTALL) -D --mode=644 doc/A-Better-APRS-Packet-Demodulator-Part-1-1200-baud.pdf $(INSTALLDIR)/share/doc/direwolf/A-Better-APRS-Packet-Demodulator-Part-1-1200-baud.pdf
 	$(INSTALL) -D --mode=644 doc/A-Better-APRS-Packet-Demodulator-Part-2-9600-baud.pdf $(INSTALLDIR)/share/doc/direwolf/A-Better-APRS-Packet-Demodulator-Part-2-9600-baud.pdf
 #
-# Sample config files also go into the doc directory.
+# Various sample config and other files go into examples under the doc directory.
 # When building from source, these can be put in home directory with "make install-conf".
 # When installed from .DEB or .RPM package, the user will need to copy these to
 # the home directory or other desired location.
-# Someone suggested that these could go into an "examples" subdirectory under doc.
 #
-	$(INSTALL) -D --mode=644 direwolf.conf $(INSTALLDIR)/share/doc/direwolf/direwolf.conf
-	$(INSTALL) -D --mode=644 telemetry-toolkit/telem-m0xer-3.txt $(INSTALLDIR)/share/doc/direwolf/telem-m0xer-3.txt
-	$(INSTALL) -D --mode=644 telemetry-toolkit/telem-balloon.conf $(INSTALLDIR)/share/doc/direwolf/telem-balloon.conf
-	$(INSTALL) -D --mode=644 telemetry-toolkit/telem-volts.conf $(INSTALLDIR)/share/doc/direwolf/telem-volts.conf
+	$(INSTALL) -D --mode=644 direwolf.conf $(INSTALLDIR)/share/doc/direwolf/examples/direwolf.conf
+	$(INSTALL) -D --mode=644 dw-start.sh $(INSTALLDIR)/share/doc/direwolf/examples/dw-start.sh
+	$(INSTALL) -D --mode=644 sdr.conf $(INSTALLDIR)/share/doc/direwolf/examples/sdr.conf
+	$(INSTALL) -D --mode=644 telemetry-toolkit/telem-m0xer-3.txt $(INSTALLDIR)/share/doc/direwolf/examples/telem-m0xer-3.txt
+	$(INSTALL) -D --mode=644 telemetry-toolkit/telem-balloon.conf $(INSTALLDIR)/share/doc/direwolf/examples/telem-balloon.conf
+	$(INSTALL) -D --mode=644 telemetry-toolkit/telem-volts.conf $(INSTALLDIR)/share/doc/direwolf/examples/telem-volts.conf
 #
 # "man" pages
 #
@@ -552,6 +553,7 @@ install : $(APPS) direwolf.conf tocalls.txt symbols-new.txt symbolsX.txt dw-icon
 .PHONY: install-conf
 install-conf : direwolf.conf
 	cp direwolf.conf ~
+	cp sdr.conf ~
 	cp telemetry-toolkit/telem-m0xer-3.txt ~
 	cp telemetry-toolkit/telem-*.conf ~
 ifneq ($(wildcard $(HOME)/Desktop),)
diff --git a/doc/Raspberry-Pi-APRS.pdf b/doc/Raspberry-Pi-APRS.pdf
index 942085f..4338a9f 100644
Binary files a/doc/Raspberry-Pi-APRS.pdf and b/doc/Raspberry-Pi-APRS.pdf differ
diff --git a/doc/Raspberry-Pi-SDR-IGate.pdf b/doc/Raspberry-Pi-SDR-IGate.pdf
index 6420a52..75a6239 100644
Binary files a/doc/Raspberry-Pi-SDR-IGate.pdf and b/doc/Raspberry-Pi-SDR-IGate.pdf differ
diff --git a/doc/User-Guide.pdf b/doc/User-Guide.pdf
index d3ebdff..bde7dca 100644
Binary files a/doc/User-Guide.pdf and b/doc/User-Guide.pdf differ
diff --git a/dw-start.sh b/dw-start.sh
index cec1723..ac86396 100644
--- a/dw-start.sh
+++ b/dw-start.sh
@@ -14,11 +14,20 @@
 # This script has some specifics the Raspberry Pi.
 # Some adjustments might be needed for other Linux variations.
 #
+
+#
+# When running from cron, we have a very minimal environment
+# including PATH=/usr/bin:/bin.
+#
+
+export PATH=/usr/local/bin:$PATH
+
 # First wait a little while in case we just rebooted
 # and the desktop hasn't started up yet.
 #
 
 sleep 30
+LOGFILE=/tmp/dw-start.log
 
 #
 # Nothing to do if it is already running.
@@ -28,7 +37,7 @@ a=`pgrep direwolf`
 if [ "$a" != "" ] 
 then
   #date >> /tmp/dw-start.log
-  #echo "Already running." >> /tmp/dw-start.log
+  #echo "Already running." >> $LOGFILE
   exit
 fi
 
@@ -52,26 +61,40 @@ then
   export DISPLAY="$d"
 fi
 
-echo "DISPLAY=$DISPLAY" >> /tmp/dw-start.log
+echo "DISPLAY=$DISPLAY" >> $LOGFILE
 
-echo "Start up application." >> /tmp/dw-start.log
+echo "Start up application." >> $LOGFILE
+
+#
+# For normal operation as TNC, digipeater, IGate, etc.
+# Print audio statistics each 100 seconds for troubleshooting.
+#
+
+DWCMD="direwolf -a 100"
+
+# Alternative for running with SDR receiver.
+# Piping one application into another makes it a little more complicated.
+# We need to use bash for the | to be recognized. 
+
+#DWCMD="bash -c 'rtl_fm -f 144.39M - | direwolf -c sdr.conf -r 24000 -D 1 -'"
 
 # 
 # Adjust for your particular situation:  gnome-terminal, xterm, etc.
 #
 
+
 if [ -x /usr/bin/lxterminal ]
 then
-  /usr/bin/lxterminal -t "Dire Wolf" -e "/usr/local/bin/direwolf -a 100" &
+  /usr/bin/lxterminal -t "Dire Wolf" -e "$DWCMD" &
 elif [ -x /usr/bin/xterm ] 
 then
-  /usr/bin/xterm -bg white -fg black -e "/usr/local/bin/direwolf -a 100" &
+  /usr/bin/xterm -bg white -fg black -e "$DWCMD" &
 elif [ -x /usr/bin/x-terminal-emulator ]
 then
-  /usr/bin/x-terminal-emulator -e  "/usr/local/bin/direwolf -a 100" &
+  /usr/bin/x-terminal-emulator -e "$DWCMD" &
 else
   echo "Did not find an X terminal emulator."
 fi
 
-echo "-----------------------" >> /tmp/dw-start.log
+echo "-----------------------" >> $LOGFILE
 
diff --git a/sdr.conf b/sdr.conf
new file mode 100644
index 0000000..e506e52
--- /dev/null
+++ b/sdr.conf
@@ -0,0 +1,30 @@
+#
+# Sample configuration for SDR read-only IGate.
+#
+
+# We might not have an audio output device so set to null.
+# We will override the input half on the command line.
+ADEVICE null null
+CHANNEL 0
+MYCALL xxx
+
+# First you need to specify the name of a Tier 2 server.  
+# The current preferred way is to use one of these regional rotate addresses:
+
+#	noam.aprs2.net 		- for North America
+#	soam.aprs2.net		- for South America
+#	euro.aprs2.net		- for Europe and Africa
+#	asia.aprs2.net 		- for Asia
+#	aunz.aprs2.net		- for Oceania 
+
+IGSERVER noam.aprs2.net
+
+# You also need to specify your login name and passcode. 
+# Contact the author if you can't figure out how to generate the passcode.
+ 
+IGLOGIN xxx 123456
+
+# That's all you need for a receive only IGate which relays
+# messages from the local radio channel to the global servers.
+
+