9XTend-PKG-U™ USB RF Modem User’s Guide
17
3. RF Modem Configuration
3.1. Programming Examples
See “AT Command Mode” on page 15 for information on enter-
ing and exiting Command Mode and sending AT commands.
3.1.1. AT Commands
Digi has provided X-CTU software for programming the modem
using an extensive list of AT Commands. The X-CTU software
provides an interface that is divided into four tabs that facilitate
the following functions:
• PC Settings tab - Setup PC serial port to interface with an RF modem
• Range Test tab - Test RF modem's range in varying environments
• Terminal tab - Configure and read RF modem parameters using AT Commands
• Modem Configuration tab - Configure and read RF modem parameters
To install the X-CTU Software:
PC Settings Tab (of the X-CTU Software)
As stated in the Serial Communications section [p9]; in order to communicate data to the RF
modem through the PC, the baud (serial data rate), data bit, parity and stop bit settings on the PC
serial port must match those of the modem. The 'PC Settings' tab provides a software user inter-
face that facilitates the modification of PC serial port setting.
PC Setup
Terminal Tab (of the X-CTU Software)
A terminal program has been built into the X-CTU software and is located under the 'Terminal' tab.
The Terminal tab provides an easy-to-use interface for programming the modem.
Multiple AT Commands. Multiple AT commands can be entered on one line with one carriage
return at the end of the line. Each command must be delimited by a comma (spaces in between
are optional). The "AT" prefix is only sent before the first command and should not be included
with subsequent commands in a line.
System Response. When a command is sent to the modem, the modem will parse and execute
the command. Upon successful execution of a command, the modem returns an "OK" message. If
execution of a command results in an error, the modem returns an "ERROR" message.
Double-click the ‘setup_X-CTU.exe’ file that is located on the Digi CD and under the ‘Downloads’
section of the following web page: www.maxstream.net/helpdesk/download.php. Then follow
the prompts of the installation screens.
1. Install drivers that enable the RF modem to interface with a host PC [refer to p8].
2. Connect the RF modem to a PC using a standard USB cable.
(This also powers the RF modem.)
3. Launch X-CTU Software and select the PC Settings tab. If necessary, adjust values in the
'Com Port Setup' section to match currently stored parameter values of the RF modem.
Examples in this section cite the
use of Digi's X-CTU Software for
programming the RF modem.
Other programs such as ‘Hyper-
Terminal’ can also be used to pro-
gram the modem.
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