First cut at User Guide changes to section 6 to replace JT9 with FT8.

doc/CMakeLists.txt

@@ -53,7 +53,7 @@ set (UG_SRCS
   tutorial-example4.adoc
   tutorial-example5.adoc
   tutorial-example6.adoc
-  tutorial-main-window.adoc
+  tutorial-download-samples.adoc
   tutorial-wide-graph-settings.adoc
   utilities.adoc
   vhf-features.adoc

doc/user_guide/en/tutorial-download-samples.adoc

@@ -0,0 +1,15 @@
+// Status=review
+
+[[DOWNLOAD_SAMPLES]]
+=== Download Samples
+
+The following steps will download sample audio Wave files that were originally recorded
+by WSJT-X. These files can be read in to simulate realtime operation. 
+ 
+- Select *Download samples...* from the *Help* menu.
+
+- Download some or all of the available sample files using checkboxes
+on the screen shown below.  For this tutorial you will need at least
+the FT8 files.
+
+image::download_samples.png[width=400,align="center",alt="Download Samples"]

doc/user_guide/en/tutorial-example3.adoc

@@ -1,14 +1,9 @@
 // Status=review
 .Main Window:
-- Select *FT8* on the *Mode* menu.
+- Click the *Stop* button on the main window to halt any data acquisition.  
+- Select *FT8* from the *Mode* menu and *Deep* from the *Decode* menu.
 - Double-click on *Erase* to clear both text windows.
 
-.Wide Graph Settings:
-
-- *Bins/Pixel* = 5, *Start* = 100 Hz, *N Avg* = 2
-- Adjust the width of the Wide Graph window so that the upper
-frequency limit is approximately 3300 Hz.
-
 .Open a Wave File:
 
 - Select *File | Open* and navigate to
@@ -53,6 +48,11 @@ box *Hold Tx Freq*.
 TIP: Keyboard shortcuts *Shift+F11* and *Shift+F12* provide an easy
 way to move your Tx frequency down or up in 60 Hz steps.
 
+TIP: Sliders and spinner controls respond to *Arrow* key presses
+and *Page Up/Down* key presses, with the *Page* keys moving the
+controls in larger steps.  You can also type numbers directly into
+the spinner controls or use the mouse wheel.
+
 TIP: An online {ft8_tips} by ZL2IFB offers many additional tips on
 operating procedures.
 

doc/user_guide/en/tutorial-main-window.adoc

@@ -1,25 +0,0 @@
-// Status=review
-
-- Click the *Stop* button on the main window to halt any data acquisition.  
-
-- Select *JT9* from the *Mode* menu and *Deep* from the *Decode* menu.
-
-- Set the audio frequencies to *Tx 1224 Hz* and *Rx 1224 Hz*.  
-
-+
-
-TIP: Sliders and spinner controls respond to *Arrow* key presses
-and *Page Up/Down* key presses, with the *Page* keys moving the
-controls in larger steps.  You can also type numbers directly into
-the spinner controls or use the mouse wheel.
-
-[[DOWNLOAD_SAMPLES]]
-=== Download Samples
-
-- Select *Download samples...* from the *Help* menu.
-
-- Download some or all of the available sample files using checkboxes
-on the screen shown below.  For this tutorial you will need at least
-the JT9 files.
-
-image::download_samples.png[align="center",alt="Downlod Samples"]

doc/user_guide/en/tutorial-wide-graph-settings.adoc

@@ -1,13 +1,20 @@
 // Status=review
 
-- *Bins/Pixel* = 4
-- *Start* = 200 Hz
-- *N Avg* = 5
+Set up the Wide Graph (also called the Waterfall). It is important to set appropriate lower and upper 
+audio frequency limits for the Wide Graph because these limits define the FT8 decoder's search window.
+
+- Set *Start* = 100 Hz.
+- Set *Bins/Pixel* = 5. Smaller/larger values make the Wide Graph cover a smaller/larger 
+frequency range.
+- Use the mouse to grab the left or right edge of the *Wide Graph*, and
+adjust its width so that the upper frequency limit is about 3300 Hz.
+- Set *N Avg* = 2. Smaller/larger values will make the wide graph update more/less frequently, resulting
+in signals being more/less spread out in the vertical (time) direction on the Wide Graph spectrogram. 
+Larger values make it easier to see very weak signals. 
 - *Palette* = Digipan 
 - *Flatten* = checked 
 - Select *Cumulative* for data display
 - *Gain* and *Zero* sliders for waterfall and spectrum set near midscale
-- *Spec* = 25%
+- Set *Spec* = 25%. This value determines the percentage of the vertical size of the Wide Graph 
+that will be used for the line plot of the spectrum.
 
-- Use the mouse to grab the left or right edge of the *Wide Graph*, and
-adjust its width so that the upper frequency limit is about 2400 Hz.

doc/user_guide/en/wsjtx-main.adoc

@@ -141,27 +141,20 @@ include::transceiver-setup.adoc[]
 == Basic Operating Tutorial
 
 This section introduces the basic user controls and program behavior
-of _WSJT-X_, with particular emphasis on the JT9, JT65, and FT8 modes.
+of _WSJT-X_, with particular emphasis on the FT8 mode.
 We suggest that new users should go through the full HF-oriented
-tutorial, preferably while at your radio.  Note that as of late 2018,
-digital usage on the HF bands has mostly moved from JT65 and JT9 to FT8.  So
-you may wish to pay particular attention to *FT8*, in Section 6.6.
+tutorial, preferably while at your radio.  
 
 Subsequent sections cover additional details on <<MAKE_QSOS,Making
 QSOs>>, <<WSPR,WSPR mode>> and <<VHF_AND_UP,VHF+ Features>>.
 
-[[TUT_MAIN]]
-=== Main Window Settings
-include::tutorial-main-window.adoc[]
+[[TUT_SAMPLES]]
+include::tutorial-download-samples.adoc[]
 
 [[TUT_WIDE_GRAPH]]
 === Wide Graph Settings
 include::tutorial-wide-graph-settings.adoc[]
 
-[[TUT_EX1]]
-=== JT9
-include::tutorial-example1.adoc[]
-
 [[TUT_EX3]]
 === FT8
 include::tutorial-example3.adoc[]