9409 E. 55th Pl. S. • Tulsa, OK 74145 • Ph: (918) 622-7052 • Fax: (918) 664-8557 MCDR INSTRUCTION MANUAL MCDR Multi-Channel Data Receiver P/N 10D1068-L, M, H 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.
MCDR Instruction Manual Table of Contents Section 1: MCDR Multi-Channel Data Receiver ................................................................. 3 Description .................................................................................................................................................. 3 Model Numbers (3 models) ......................................................................................................................... 3 Design Features ..............................
Section 1: MCDR Multi-Channel Data Receiver Description The Multi-Channel Data Receiver (MCDR) is an OEM modular modem for users who need low power and small size with serial communications. The MCDR is a smaller version of the MCDT-R and is fully compatible. The MCDR is equipped with a RS-485 communications port which is a simple, lowcost interface, utilizing few components and allows for daisy-chaining multiple receivers.
Current Draw Approximations: Mode Current Sleep 20uA Active 5.0mA Receiver On 35mW @ 3.5VDC 165mW @ 16.5VDC Receiver Active 16.
FCC ID Label Location Figure 2. MCDR Receiver Section 2: MCDR Operation Using the settings provided in Section 3: Serial Interface, open a serial communication program such as HyperTerminal and supply power to the MCDR. A USB to RS485 cable is available that can connect directly to the MCDR. The USB port from a computer is capable of powering the MCDR. Start Up When the MCDR is initially powered on, a “BL” output string is sent to indicate the opportunity for entering the “Boot Loader” mode.
Receiving During normal operation, the MCDR is capable of receiving SEIWG-005 messages via the serial port and via radio frequency. The MCDR assumes a low-power shut-down mode to conserve power when not in use. Items Required 1. 2. 3. 4. DC Power Source: 3.5VDC receiver to 16.5 Volts Personal Computer with USB or RS232 port 10-pin connector to RS-485 USB cable (QTI part# 10D1978) Serial Communications Program such as HyperTerminal Setup 1. Set the Channel. (Default CHR 001) 2. Enable receiver, if desired.
processor. Once awake the user can poll to get the new message. See the NEW command. If the MCDR is still awake and the MCDR receives a new message, the shut-down mode will not occur until the RS485 serial ID has been sent and acknowledged. The user’s application must respond or an infinite loop condition would occur causing the MCDR to never shut down. The MCDR communicates over RS-485. Commands must be followed by a carriage return ().
Status Code Table STATUS ALARM TAMP/TEST LOBATT R>L L>R MEANING CODE 00 0 0 0 0 0 RESERVED 01 0 0 0 0 1 RESERVED 02 0 0 0 1 0 RESERVED 03 0 0 0 1 1 FAULT 04 0 0 1 0 0 RESERVED 05 0 0 1 0 1 RESERVED 06 0 0 1 1 0 RESERVED 07 0 0 1 1 1 FAULT, LOBATT 08 0 1 0 0 0 TEST 09 0 1 0 0 1 RESERVED 0A 0 1 0 1 0 RESERVED 0B 0 1 0 1 1 TEST, FAULT 0C 0 1 1 0 0 TEST, LOBATT 0D 0 1 1 0 1 RESERVED 0E 0 1 1 1 0 RESERVED 0F 0 1 1 1 1 TEST, FAULT, LOBATT 10 1 0 0 0 0 ALARM 11 1 0 0 0 1 ALARM, L>R 12 1 0 0 1 0 ALARM, R>L 13 1 0 0
MCDR Serial Commands: Note: It is recommended that when using a processor to control the MCDR that the format described under Checksum be used. This format helps ensure data integrity by greatly reducing communication errors and is more robust for machine to machine (M2M) applications. Valid commands will return the command and the argument followed by the word “OK”. Invalid commands return “SYNTAX ERROR”. Invalid command arguments will return “ERR” at the end of the command and argument.
CRF… Get the receive channel as a frequency in Hz. (138000000-174000000) Get the frequency: CRF Returns: CRF Z M2M…Get/Set machine to machine mode (follow with SAV command). In machine to machine mode all returned messages begin with ‘#’ and end with the checksum before the . Commands can be issued without ‘#’ and a checksum. No syntax errors are reported for unknown commands.
Returns: PSH Z OK Invalid returns: PSH Z ERR RCV…Get/Set receive mode. Z = 1: ON (receiver enabled) [DEFAULT]; CAUTION: If no receiver has been installed, the receiver should be disabled to conserve power. Z = 0: OFF (receiver disabled) Get receive mode: RCV Returns: RCV Z Set receive mode: RCV Z Returns: RCV Z OK Invalid returns: RCV Z ERR RSS… Get the receive signal strength indicator (RSSI).
SRN… Get the unit serial number. The serial number is a string up to 8 characters long. Get serial number: SRN Returns: SRN Z TMP… Get the board temperature in degrees Celsius (decimal), with a tenth degree precision (250 = 25.0C). Get temperature: TMP Returns: TMP Z VER… Get the unit version. MCDR is the model, , VVVV is the firmware version (Major.Minor.Build.
Example Checksum Line to send is “#ACHR 597” Convert characters to ASCII values: # (35) + A (65) + C (67) + H (72) + R (82) + (32) + 5 (53) + 9 (57) + 7 (55) NOTE: is not included in calculation.
Section 5: 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 6: 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 640 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.