FLEX-6700 - How To

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Getting Started

One must first read through the Flex SmartSDR manuals. These are located here: [1]

After reading this manual, one should watch SmartSDR video tutorials. SmartSDR software changes update to update, and videos are the most current means to understand the most current way to accomplish a task. A video giving an overview of a 6300 is available here by the AARL: [2]

Selecting antennas

Step 0: Start program

Ensure WeMo is turned on. Knobs should both be on "REMOTE" on the antenna selection box.

Step 1: Start program

On the Windows 7 task bar, select this icon:


It may also appear as this:


It is important to only have one instance of this program running at once. Do not click the icon on the desktop as it will start another instance of the program. If you have multiple instances running at once, the UI of the program will appear as this (Note the COM error and the grey indicator at the top center of the window):

File:ShackLan Error1.png

File:ShackLan Error2.png

You will not be able to select antennas until you have closed all instances of the program and re-opened only one instance of the program. This is true across multiple user accounts. Only use the "FLEX6700" user account to control antennas.

Step 2: Select Radio 2

Search the desktops for this interface. Select "Radio 2". It should now appear in blue:

File:ShackLan interface.png

Step 3: Select Antenna

Click an antenna to use, it will now be green:

File:ShackLan antenna selected.png

Step 4: Disconnect Antenna

When finished, be sure to click the currently green antenna. This will disconnect it and ensure that it is free for other users. If this is not done, someone may resort to using the manual antenna switch, disabling remote antenna control. The UI should look like this when the antennas are disconnected:

File:ShackLan disconnect.png


Step 1: Create Slice A

The first step is to create a slice in SmartSDR. Ensure there that Slice A exists and DAX is set to "Channel 1". Also ensure DAX is enabled on the right audio pane. Step 1 must be performed before opening FLDIGI in Step 2.

Step 2: Open FLDIGI

Once the slice is created, FLDIGI can be opened and will show Slice A's frequency. You can now begin to operate.

Failure to follow these procedures will result in FLDIGI not reading the Flex's frequency or being able to key the radio. All FLDIGI instances must be quit and restarted in order for FLDIGI to work correctly.


  • Make sure SmartSDR CAT is running
  • Initialise in RigControl on FLDIGI settings
  • Make sure ATU is selected
  • Make sure DAX is enabled in SMARTSDR and "channel on"e is selected for Slice A
  • Make sure Slice A is streaming in DAX Control Panel, both TX and Slice A buttons should be blue

Instruction Writing In Progress

WSJT-X (in progress)

Mode: JT9 + JT65

Step 1:Start Program

Open Commander Note needs to be opened before WSJT-X

Step 2:Create Slice

Create a slice in the flex radio and set it to 14.076.000Hz Set a DAX channel (1-8)

Step 3:Start Program


Setup File -> Settings 1. Add your call sign under general tab 2. Change to correct DAX channel under audio tab

Step 4:First Contact

Making your first contact

photo 1 WSJT-X will automatically decode FM and put them to the left All CQ's, request to communicate, will show up in green

Double clicking a CQ to respond will add it to the right column and auto fill the generated messages

Photo 2

Click "Enable TX" and Tx 1 to respond to the CQ

Once the cycle restarts your respond to CQ will auto key the Flex 6700 radio and start to transmit your transmission will show up in yellow

Photo 3

Sending a CQ message

Photo A

Click tab 2

Click Enable Tx

Click CQ

This will send out a CQ on the start of the next cycle

WSPR (in progress)