Sound Card Packet  with AGWPE

Translations of this site
Most recent AGWPE version is:  2013.415  15 Apr 2013

Computer requirements
Packet Engine Pro

Configure AGWPE
Download and Install
Basic AGWPE Setup
2 Radio Setup
2 Card Setup

Sound Device Setup
Basic Device Settings
Rename Sound Device
Additional Settings
Using the Tuning Aid

Program Behavior

AGWPE Features
AGWPE on a Network
Baud Rates & Modes
Remote Control
TCP/IP Over Radio
Tips and Tricks
Traffic Parameters

Compatible Programs:
Setup Help

Radio Interface
Getting Started
Kits and Pre-assembled
USB SignaLink
Receive Audio Cable
Transmit Audio Cable
PTT (TX Control) Cable
2 Radio Modification

About Packet
Packet Overview
Exchange Modes
What To Do with Packet
Common Frequencies
Frame Headers
Further Reading

Radio Mobile Deluxe and AGWPE

Radio Mobile Deluxe (RMD) is a program that predicts radio propagation and signal path quality over specific terrain using digital elevation maps. It is quite an amazing and powerful program.

One of its features allows you to capture and plot APRS packets on the elevation maps using AGWPE. You can then "see" how well APRS digipeaters, home stations, and mobile stations will "hear" other's packets.

You can download the RMD files at:


Note that RMD is difficult to setup and learn, and downloading digital elevation map data can be time consuming if you only have a dial-up internet connection. General instructions for program use are beyond the scope of this web page, but the specific setup for AGWPE is as follows:

1. Install and configure AGWPE and first test that AGWPE is working with AGWTerm.

2. Install and configure RMD. Create an RMD map for the APRS coverage area you wish to examine (see RMD's Help file).

3. From the RMD menu, select Options, then APRS Options. In the resulting APRS Setup window, do the following:

  • Enter a check mark for Enable APRS.
  • For AGWpacket Host enter the IP address of the computer where AGWPE is running. The default is, a special IP address that means 'this computer', in other words the same computer where RMD is running. If AGWPE is running on a different computer, enter the AGWPE computer's IP network address.
  • For Port, use 8000, the default IP port that AGWPE uses. (It would only be different if you changed the port number in AGWPE's TCP/IP interface settings.)
  • Press the Apply button and close the window.

APRS station callsigns should begin to appear on the RMD map and then disappear when a new station is heard. After the positions of relaying digipeaters are also received, RMD will then display the station originating the packet, the digipeater(s) it was heard through, and signal path lines connecting all of them.

To "permanently" display an APRS station position, use the lower half of the APRS Options window to make an APRS station in the left column become an RMD network "unit": check mark an available unit name/number in the right column, then highlight the APRS unit in the left column and press the arrow key between the two columns.

You can also add the APRS stations into a RMD "network" if you want to further examine APRS coverage and the APRS digipeater network, but explaining how to do that is beyond the scope of this page. You'll have to work with and learn RMD.

Last Updated:

by Ralph Milnes NM5RM


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