User`s manual
Ewave Stamper User’s Manual V1.0
Copyright © 2001 by Ewave, Inc.4
2 Overview
The picture at right shows a pair of
STAMPER radio modems as they would be
connected in a typical BASIC Stamp
system. The cable in the lower-right corner
goes to the PC’s Comm. port.
The STAMPER’s high performance design
employs a matched pair of transceivers for
true “full-duplex” operation, which means
each radio modem allows simultaneous
transmission of data on one radio frequency
while receiving data on a second radio
frequency offset by 25MHz. Ewave refers
to these pairs of transceivers as “base”
(long, rigid antenna, on the right in the
picture) and “mobile” (short rubber antenna,
on the left) units.
3 Installation
Installation of the STAMPER is extremely
simple and quick provided you follow the
steps below. These steps are ordered to
help you efficiently resolve any installation
dependencies.
1. Verify you are using Version 1.1 or
higher of the Parallax BASIC Stamp
Editor.
• To do this, on your PC start Parallax’s BASIC Stamp Editor (or open an existing BASIC Stamp
project) and verify the program’s version in the Help / About menu. Version 1.1 or higher of the
Parallax BASIC Stamp Editor is required when using the STAMPER modems. If you do not
have version 1.1 or higher, visit http://www.parallaxinc.com to upgrade your BASIC Stamp Editor
before proceeding.
2. Verify that programming/debugging works with a normal, wired connection, before attempting to
install the STAMPER radios. If the wired configuration does not work, please resolve the problem
before proceeded, contacting Parallex if necessary.
3. Attach the STAMPER radios in place of the wired connection between your PC and the BASIC
Stamp circuit board.
• Be sure to use the correct 9-pin Adapters with each radio – the Adapters are shipped attached
to the modems and are also labeled (see above photo).
• The Modem-to-PC adapter has a female connector on one side and a male connector on the
opposite side. This adapter goes between the PC and the Modem. It can only be installed in the
correct manner physically, because all STAMPER modems have female DB9 connectors.
• The Modem-to-Stamp adapter has two male connectors, and goes between the modem and the
BASIC Stamp development board. Because of this, it can be physically installed backwards.
Installing the adapter backwards will not damage the modem or the BASIC Stamp. It will
however prevent the wireless link from working. The adapters are shipped from the factory
attached to the modems correctly. If the adapter has been removed the correct orientation can be
determined by the labeling. The side labeled “Modem” goes to the Ewave STAMPER Modem,
and the side labeled “BASIC” goes to the BASIC Stamp. Typically the Mobile STAMPER (with