Instruction Manual

QTI Page 3 of 13 Revision: A
Form #: 30Z0250 Effective Date: 16 December 2009
Section 1: MCDT Multi-Channel Data Transceiver
Description
The Multi-Channel Data Transceiver (MCDT) is available as a modular modem to OEM users who want to
design it into their own equipment. Equipped with RS-485 communications, the MCDT can be set up using a
personal computer. The MCDT is capable of transmitting or receiving SEIWG-5 data messages, including a
status code and distinct ID, over a radio frequency. This frequency is selectable via synthesizer control
circuits, providing a selection of up to 1920 RF channels, depending on the model’s frequency range. The
MCDT comes in Low-Band, Medium-Band, and High-Band models, having the following frequency ranges:
Low Band
Medium Band
High Band
Channel 001 = 138.025 MHz
Channel 001 = 154.005 MHz
Channel 001 = 162.00625 MHz
Channel 600 = 153.000 MHz
Channel 1600 = 162.000 MHz
Channel 1920 = 174.000 MHz
Antenna: MMCX plug to accept user-supplied antenna
Power Supply: User-supplied, 4.8V to 16.5VDC nominal,
18 VDC absolute maximum
Connections:
Current Draw approximations:
Mode
Current
Comments
Sleep
33uA
RS485 command will wake unit up
Active
7.0mA
Receiver Off / Microprocessor On
Transmission(1Watt)
57ms @ 1.5A
Pulse Current Provided by Super Caps
Transmission(2Watt)
57ms @ 3A
Pulse Current Provided by Super Caps
Receiver On
12.6mA
Receiver On – Waiting for valid RF message
Receiver Active
16.9mA
RF message received – Microprocessor On
Design Features
ID Code Selection 000-999 for EMIDS, 000-063 for all other formats
Directional, sensor fault, low battery, tamper, and test status codes for EMIDS format
Able to receive and transmit MIDS 20-bit, MMIDS / EMIDS 29-bit messages, TRSS, or REMBASS
MMCX antenna port matched to 50 ohms
Conformal-coated and shielded circuit assembly
Operation
Connections to the MCDT can be made using a ribbon cable connected to J1 or using flying leads soldered
directly to the VIAS. See Connections table above to determine pin outs. Using the settings provided in Section
3: Serial Interface, open a serial communication program such as HyperTerminal and supply power to the
MCDT. Upon establishing a connection to the MCDT, the computer screen will display “BL<LF><CR>” for
one second and then display the version information. This indicates a ready status.
The “BL” (Boot Loader) response provides for one (1) second the opportunity to enter the programming mode.
Sending a “P” will enter the firmware upgrade mode and erase the firmware of the device. Therefore, the user
is advised not to send any characters to the unit, especially not the character “P”, to the unit before the version
information is received.
Function
J1
(10-pin FTS-105)
Via
Vin [Input] 4.8 to 16.5 VDC
1, 2
E1
GND
8, 9, 10
E8
RS485 – A+ [I/O]
5
E4
RS485 – B– [I/O]
4
E5
Transmit Drive [Output] Active low
3
E3
VCC [Out] 5.4VDC
6
E2
Wakeup [I/O] Active low
7
E6