© 2009 Cypress Solutions
Complete Manual: CTM-15X Firmware 1.2.0
(Revision 1.0)
15
1BInstalling Your Modem
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.
2.5
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.
2.6
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.
DB9 Pin Signal Name
Direction
1
DCD
Data Carrier Detect
CTM-15x to PC
2
RxD
Received Data (by DTE)
CTM-15x to PC
3
TxD
Transmitted Data (by DTE)
PC to CTM-15x
4
DTR
Data Terminal Ready
PC to CTM-15x
5
GND
Signal Ground
6
DSR
Data Set Ready
CTM-15x to PC
7
RTS
Request To Send
PC to CTM-15x
8
CTS
Clear To Send
CTM-15x to PC
9
RI
Ring Indicator
CTM-15x to PC
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.
2.7
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.