
© 2010 Cypress Solutions Complete Manual: CTM-15X Firmware 1.3.0
Open CTM (Revision D)
The modem antenna connector is a standard SMA female type that requires the antenna cable to use a
male SMA connector. The CTM-15x can be provided with alternate antenna connector types – contact
Cypress Solutions for details.
3.4 Mounting and Attaching the GPS Antenna
The GPS antenna used with the CTM-15x (with GPS) must be an active type with gain of at least 26dB and
compatible with a 3.3 volt dc supply provided directly by the modem over the coax cable. The antenna
installation should typically be on an upper horizontal surface of a vehicle with a clear 360 degree view of
the sky.
The GPS antenna connector is a standard MCX type or SMA female depending on whether the CTM-15X
modem is PC-CARD based or Express card/module/USB based. The CTM-15x can be provided with
alternate antenna connector types – contact Cypress Solutions for details.
3.5 Serial Data Cable Connection
The serial data port is a standard DB9 female connector configured as Data Communication Equipment
(DCE) and is wired as per the table below.
Transmitted Data (by DTE)
Serial data ports on most computer equipment are configured as Data Terminal Equipment (DTE) with a
DB9 male connector. A standard serial data cable will allow for direct connection of the CTM-15x to most
computer and terminal equipment. In some cases it may be necessary to insert a “null modem” or
“gender changer” in the serial data line in order to correctly connect between the devices.
3.6 Connecting to the I/O Port
The I/O port provides for the control of 4 external devices and for monitoring 6 external sensors.
Connections are made via the 12 position connector.
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