// Status=review
.Open a Wave File:

- Select File | Open and navigate to ...\save\samples\130418_1742.wav
under your program installation directory.  

When the file opens you should see something similar to the to the
following screen shot:

[[X12]]
image::images/r3556-main-ui-80.png[align="center",alt="Main UI and Wide Graph"]

.Decoding Overview

Notice the [green]*GREEN* and [red]*RED* markers on the waterfall
frequency scale.  Decoding takes place at the end of a receive
sequence and is organized in two stages.  The first decodes take place
at the selected Rx frequency, indicated by the green marker.  Results
appear in both the left (“Band Activity”) and right (“Rx Frequency”)
text windows on the main screen. The decoder then finds and decodes
all signals in the selected mode(s) and the displayed frequency
range. The red marker indicates your Tx frequency.

At least eight JT9 signals are present in the example file; all
but one of them are decodable.  When this file was recorded KF4RWA was
finishing a QSO with K1JT.  Since the green marker was placed at his
audio frequency, 1224 Hz, his message “K1JT KF4RWA 73” appears in both
decoded text windows.  The “Band Activity” window shows this message
as well as all the other decodes at nearby frequencies.  The CQ lines
are highlighted in [green]*GREEN*, and lines containing “My Call”, in
this case K1JT, are highlighted in [red]*RED*.

TIP: For this step and the next, you may want to pretend you are K1JT by
entering that call temporarily as “My Call” on the <<X11,Configuration
Screen>>.  Your results should then be identical to those shown in the
<<X12,screen shot>> above.

[[X13]]
.Decoding Controls
To gain some feeling for the controls you will use when making QSOs, try 
clicking with the mouse on the decoded text lines and on the waterfall spectral 
display. You should be able to confirm the following behavior:

- Double-click on either of the decoded lines highlighted in green. This action
should produce the following:

** Copies call-sign and locater of a station calling CQ to the “DX Call” 
and “DX grid” entry fields.

** Generates suitable messages for a minimal QSO and checks or clears the Tx
even box so that you will transmit in the proper (odd or even) minutes.

** Rx and Tx frequency markers will be moved to the CQ-ing station’s frequency,
and the Gen Msg (“generated message”) radio button at bottom right of the main
window will be selected.

** If you had checked “Double-click on call sets Tx Enable” on the Setup menu,
Enable Tx would also be activated, and you would start to transmit automatically,
at the appropriate time.

- Double-click on the decoded line with the message “K1JT N5KDV EM41”,
highlighted in [red]*RED*.  Results will be similar to those in the
previous step, except the Tx frequency ([red]*RED* marker) is not
moved.  Such messages are usually in response to your own CQ, or from
a tail-ender, and you probably want your Tx frequency to stay where it
was.

- By holding down the Ctrl key when double-clicking on the decoded line 
you can cause both Tx and Rx frequencies to be moved.  This behavior
can also be forced by checking Lock Tx=Rx. 

- Double-click on the message from KF4RWA in either window. He is 
sending “73” to K1JT, signifying that the QSO is over.  Most likely you 
want to send 73 to him, so the message “KF4RWA K1JT 73” is automatically 
generated and selected for your next transmission.  (Alternatively, you might 
choose to send a free text message or to call CQ again.)

- Clicking on the waterfall moves the Rx frequency ([green]*GREEN* marker) to the 
selected frequency.

- Ctrl-click on waterfall moves both Rx and Tx frequencies.

- Double-click on the waterfall moves the Rx frequency and causes a 
narrow-band decode there at the new QSO frequency. Decoded text appears in the 
right window only.  Ctrl-double-click moves both Rx and Tx frequencies and 
decodes at the new frequency. 

- Clicking Erase clears the right window. Double-click on Erase to clear both 
text windows.