Instruction Manual

QTI Page 4 of 13 Revision: A
Form #: 30Z0250 Effective Date: 16 December 2009
Section 2: MCDT Operation
During normal operation, the MCDT is capable of sending and receiving SEIWG-5 messages via the serial
port and via radio frequency. The MCDT assumes a low-power shut-down mode to conserve power when not
in use.
Receiving/Transmitting
ITEMS REQUIRED
1. DC Power Source: 4.8 to 16.5 Volts
2. Personal Computer with COM port (RS-232 or USB)
3. RS-485 Adapter Cable to convert RS-485 to PC’s COM port format
4. Serial Communications Program such as HyperTerminal
SETUP
1. Set the Channel. (Default CHR 001)
2. Enable receiver, if desired. Transmit is always enabled. (Default RCV ON)
3. Enable TRSS format, or disable TRSS for EMIDS format. (Default TRSS OFF)
4. Enable Push to send messages out serial port, or disable PUSH to poll for messages. (Default PUSH ON)
RF Link
The operational range of the RF link is dependent upon various conditions. The high frequency of the RF link
works best under line of sight conditions. RF range may vary from 0.5 kilometer to 5 kilometers for open
areas using the 1-Watt setting. Greater range may be expected using the 2-Watt setting.
NOTE: Elevating an antenna will increase transmission and/or reception range significantly. The use of
relays/repeaters can also be used to increase transmission ranges. Also transmitting and receiving antennas
should both point in the same direction (typically up) so they have the same polarization.