9409 E. 55th Pl. S. * Tulsa, OK 74145 * (918) 622-7052 * Fax (918) 664-8557 MCDT INSTRUCTION MANUAL MCDT Multi-Channel Data Transceiver P/N 10D1037 All rights reserved. No part of this book may be reproduced or utilized in any form or by any means, electronic or mechanical, without the prior written permission of Qual-Tron, Inc.
MCDT Instruction Manual Table of Contents Section 1: MCDT Multi-Channel Data Transceiver .......................................................... 3 Description ............................................................................................................................................ 3 Design Features ..................................................................................................................................... 3 Operation ..........................................
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.
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. 2. 3. 4. DC Power Source: 4.8 to 16.5 Volts Personal Computer with COM port (RS-232 or USB) RS-485 Adapter Cable to convert RS-485 to PC’s COM port format Serial Communications Program such as HyperTerminal SETUP 1. 2. 3. 4.
Section 3: Serial Interface The MCDT defaults to a low-power shut down mode. Upon receiving an RF message, the MCDT will send the message via the serial port and then return to shut-down immediately. The user may initiate serial communication by sending the MCDT two ASCII characters. After 1 minute of inactivity on the serial port, the MCDT returns to low-power shut down mode.
Message Serial Format Decoded message is sent via RS-485: RXM XX YYY ZZ, where XX = Message Type, YYY = ID code, and ZZ = status code; all values are hexadecimal. MESSAGE TYPE (XX) The message type consists of two (2) hexadecimal characters. The first character shows the parity; the most significant bit will be set if the parity is bad. The second character identifies the type.
STATUS CODE (ZZ) Status Codes depend upon the message format. MIDS has no status code, and these characters should always be 00.
Commands ?……..
Poll for a new message: NEW Returns: RXM TT III SS, where TT is the message type,III is the ID, and SS is the status code Returns if no new message: RXM PSH….Get/Set to push new messages out the serial port. 1 = ON (New messages pushed out the serial port when received) 0 = OFF (must poll for new messages) Get PUSH mode: PSH Returns: PSH Z Set PUSH mode: PSH Z Returns: PSH Z PWR…Get/Set the transmitter power level.
Get serial number: SRN Returns: SRN Z TEMP… Get the board temperature in degrees Celsius, with a tenth degree precision. Get temperature: TMP Returns: TMP Z.Z TRS…..Get/Set TRSS message format. 1 = ON (TRSS message format enabled, EMIDS disabled) 0 = OFF (TRSS message format disabled, EMIDS enabled) Get TRSS format: TRS Returns: TRS Z Set TRSS format: TRS 1 Returns: TRS 1 Set EMID format: TRS 0 Returns: TRS 0 TXM…...
Section 4: Maintenance OPERATOR MAINTENANCE: The MCDT has been designed as low cost low maintenance equipment. All components are conformal coated which reduces the amount of maintenance required. The only required operator maintenance is to inspect the equipment for damage and keep the equipment clean of dirt, grime, and caked on mud. NOTE: Do not submerge the equipment in water. This could result in damage. DEPOT MAINTENANCE: Upper echelon maintenance will be performed by the supplier of the equipment.
Section 5: Frequency Range Low Mid High Frequency/Channel Calculations Frequency Ranges Frequency Min Max 138 MHz 154 MHz 154 MHz 162 MHz 162 MHz 174 MHz Channel Steps 25 kHz 5 kHz 6.25 kHz Max Channels 600 1600 1920 Channel to Frequency Calculation Channel * Channel Step + Min Frequency = Frequency for Channel Examples: - Low Band Channel 20 - 20 * 0.025 +138 =138.5 MHz - Mid Band Channel 300 - 300 * 0.005 + 154 = 155.
Section 6: FCC RF Exposure Limits: This device complies with the MPE requirements by providing a safe separation distance of 30 cm between the antenna, including any radiating structure, and any persons when normally operated. CAUTION: The antenna(s) used for this transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. This device is approved with emissions having a source-based timeaveraging duty factor not exceeding 50%.