Outpost and the Tracker

Outpost PMM and the SCS DSP Tracker TNC

The purpose of this document is to help the end user set up Outpost PMM to interface with the SCS Tracker / DSP TNC (the Tracker) for the Virginia Packet Network (VAPN).  This document assumes the end user is familiar with the features and functions of the Tracker.  See SCS’s documentation for all for details on the Tracker.

Beginning with release 3.3 of Outpost PMM, features were added to support the Tracker.  These features primarily concern the Interface Setup dialog.  This will be an overview of where those settings are and what and how they are used.  This is just an example and will vary for each users situation.

Define a new TNC

From the Main Menu bar select Settings → Interface.  Select New and you are presented with the Define New TNC dialog:

Here you give your device a name and description.  Select TNC as the Interface Type and “SCS TNC” as the TNC type.

Device setup for SCS R300: Prompts

Select the Prompts tab.  Below is an example.  There are three entry boxes on this screen.

  • Command prompt entry for the Tracker is an asterisk, so “*” should be entered in field
  • Timeout prompt should be set to “*** retry count exceeded”
  • Disconnected Prompt should be as “g* (n) DISCONNECTED where the value “n” is the channel number defined under the “Init Cmds” tab.  This will be explained in greater detail below.

Device setup for SCS R300: TNC Cmds

The next tab is the TNC Cmds where you tell Outpost what to send to the Tracker.

These are command values as defined in the SCS documentation for the Tracker.  The first three are self explanatory and the “Convers Mode” and “DateTime” fields can be ignored, use the default values.   The “TNC Command Prefix” box is important.  Verify that the checkbox is checked and that Cmd Prefix is set to 27.  This is the ASCII value for the “ESC” character that proceeds commands to the Tracker.

Device setup for SCS R300: Init Cmds

The “Init Cmds” tab is where other commands and values that meet your local needs are defined, both before and after the Send/Receive sequence.

You must, however, at the very least enter the “S” command.  This defines which channel for this particular instance. As a default the Tracker is set to channel 0.   Channel 0 is used for UI (or unnumbered information) and is used for the Tracker’s built in APRS feature. To use as a traditional TNC you need to select a channel 1 – 9.  The number you use here must be the number you enter in the “disconnected” value in the Prompts tab above.

You can also select the different protocol modes available with Tracker using the %B command.  In this example we use R300 for 200/600 Robust Packet automatic selection of speed.  For 1200 AFSK the value would be 1200, 9600 for 9600 FSK and, if you have the proper radio gear, 19200 for 19200 FSK.

Device setup for SCS R300: Com Port

The last tab that needs to be configured is the Com Port tab.

Set the Comm Port to the appropriate com port on your PC.  There are two speeds on the Tracker depending in how DIP-Switch is set, either 38400 or 115200.  Set Max Speed to what is set on the Tracker.  The rest of the values should be set as they are above.

BBS setup for W4VPN and the Tracker

Specific to VAPN regarding the Tracker, the Path tab in the BBS Setup needs to set properly.

The two fields that need to be addressed are the “Successful Connect Message:” and “Unsuccessful Connect Message” fields need to be set as above.  Note the number in parenthesis.  These numbers need to equal the channel number set above.