User's Manual

QTI Page 3 of 15 Revision: D
Form #: 30Z0250 Effective Date: 1 August 2010
Section 1: MCDT Multi-Channel Data Transceiver
Description
The Multi-Channel Data Transceiver (MCDT) is an OEM modular modem for users who need low-
power and small size with serial communications. The MCDT can be constructed as a transmitter, a
receiver or as a transceiver. The MCDT is equipped with a RS-485 communications port which is a
simple, low-cost interface, utilizing few components and allows for daisy-chaining multiple receivers.
The MCDT is capable of transmitting or receiving SEIWG-005 data messages which includes a
distinct ID and a status code, over a selectable frequency range. This frequency is selectable via the
synthesizer control circuit, providing a selection of up to 1920 RF channels, depending on the model’s
frequency range. The MCDT comes in Low-Band, Mid-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
Channel Spacing: 25 kHz Channel Spacing: 5 kHz Channel Spacing: 6.25 kHz
Model Numbers (9 models)
10D1067-RL, -RM, -RH MCDT Receiver only, low, mid, or high band
10D1067-TL, -TM, -TH MCDT Transmitter only, low, mid, or high band
10D1067-XL, -XM, -XH MCDT Transceiver, low, mid, or high band
Antenna: MMCX plug 50 ohm (J1)
(10D1984 MMCX to TNC 3” cable available)
Power Supply:
4.0 VDC to 16.5 VDC nominal
4.0 VDC to 16.5 VDC 1W Transmit
4.4 VDC to 16.5 VDC 2W Transmit
3.5 VDC to 16.5 VDC Receive
Connections:
J2 - Header Pin
(10-pin TFM-105)
Receiver Only Function Transmitter & Transceiver Function
1, 2 Vin [Input] 3.5 to 16.5 VDC Vin [Input] 4.0 to 16.5 VDC
3 Not Used Transmit Drive [Output] Active low
4 RS485 – B(+) [I/O] RS485 – B(+) [I/O]
5 RS485 – A(-) [I/O] RS485 – A(-) [I/O]
6 Same as pins 1,2 VCC [Out] 5.4VDC 50mA/3A
7 General I/O General I/O
8, 9, 10 GND GND
MCDT Receiver