Specifications
Table Of Contents
- EXPOSURE TO RF RADIATION
- MCC 545B MRC-565 DIFFERENCES
- 1 INTRODUCTION
- 2 NETWORKS
- 3 DESCRIPTION
- 4 INSTALLATION
- 4.1 Cable Connections
- 4.1.1 DC Power
- 4.1.2 VHF Antenna
- 4.1.3 GPS Antenna
- 4.1.4 I/O Port
- 4.1.5 GNSS Ethernet
- 4.1.6 Radio Ethernet Port
- 4.2 Power-Up Sequence
- 4.3 Description of Critical Device Parameters for a LOS Network
- 4.3.1 Device
- 4.3.2 Role
- 4.3.3 Radio ID Number
- 4.3.4 Frequency and Modulation Parameters
- 4.3.5 Select Site Name
- 4.4 Enter Script Files
- 4.5 RF TEST
- 5 OPERATIONS
- 5.1 Getting Started
- 5.1.1 Command Entry and Editing
- 5.1.2 HELP Command
- 5.1.3 System Time and Date
- 5.1.4 Factory Default Parameters
- 5.2 Configuring the MRC-565 Manually
- 5.2.1 Setting the Radio ID
- 5.2.2 Device Type
- 5.2.3 Setting the Operating Role
- 5.2.4 Setting the Power Mode
- 5.2.5 Selecting Network Parameters
- 5.3 Local Area Network Configuration
- 5.3.1 I/O Configuration Commands
- 5.3.2 Scheduling MRC-565 Events
- 5.3.3 Setting Timeout Duration
- 5.3.4 Defining Data Relays
- 5.3.5 Scaling A/D Readings
- 5.3.6 Selecting the Burst Monitor
- 5.3.7 Controlling the Hourly Statistics Report
- 5.3.9 Power Turn On
- 5.3.10 Saving and Restoring the Configuration
- 5.4 Sending and Receiving Messages
- 5.4.1 Entering and Deleting Messages
- 5.4.2 Editing Messages
- 5.4.3 Sending Messages
- 5.4.4 Sending Remote Commands
- 5.4.5 Sending Canned Messages
- 5.4.6 Receiving Messages
- 5.4.7 Examining Message Status
- 5.4.8 Examining and Revising Message Queues
- 5.5 Sensor I/O Port
- 5.6 Data Loggers Interface
- 5.7 CR10X Data Logger
- 5.7.5 Update Interval
- 5.7.6 Transmission Order
- 5.7.8 Time of Day
- 5.7.9 Time Tagging
- 5.7.10 Memory Management
- 5.7.11 Data Scaling
- 5.7.12 Modem Enable
- 5.7.13 Setting/Reading CR10X Internal Registers
- 5.7.14 Entering CR10X Security Codes
- 5.7.15 Downloading a CR10X .DLD Program
- 5.7.16 Replacing an MRC-565 to an Operational CR10X
- 5.7.17 Replaying Data from a CR10X
- 5.8 CR1000 Data Logger
- 5.8.1 CR1000 Driver Configuration Command Summary:
- 5.8.2 Acquire Mode:
- 5.8.3 Data Retrieval Pointer Initialization
- 5.8.4 Data Retrieval Hole Collection
- 5.8.5 Update Interval
- 5.8.6 Transmission Order
- 5.8.7 Group ID Assignment
- 5.8.8 Time of Day
- 5.8.9 Time Tagging
- 5.8.10 Memory Management
- 5.8.11 Data Scaling
- 5.8.12 Modem Enable
- 5.8.13 Reading CR1000 Internal Pointers and Error Statistics
- 5.8.14 Displaying Status Table Data
- 5.8.15 Displaying and Setting Public Table Data
- 5.8.16 Downloading a Program
- 5.9 SDI-12 Sensors
- 5.9.1 Data Collection
- 5.9.2 Setup
- 5.9.3 Periodic Data Collection
- 5.9.4 Data Logging
- 5.9.5 User Interface
- 5.9.6 MRC-565 Commands
- 5.9.7 SDI, CMD, COMMAND TEXT
- 5.9.8 SDI, TRACE, {OFF/ON}
- 5.9.9 SDI-12 Command/Response List
- 5.9.10 Serial Port Command and Response Diagrams
- 5.10 Generic Data Logger
- 5.10.1 Typical Report Formats
- 5.10.2 Setup and Configuration
- 5.10.3 Viewing the generic device driver setup
- 5.10.4 AUTO Format
- 5.10.5 MULTI-LINE Format
- 5.11 Event Programming
- 6 THEORY OF OPERATION
- 6.1 CMU (MRC-56500300-04)
- 6.1.1 Receiver Analog Front End
- 6.1.2 Digital Receiver Components
- 6.1.3 Digital Transmitter Components
- 6.1.4 Discrete Digital Output, Relay Junction and Analog Input
- 6.1.5 Power Amp Interface
- 6.2 Microprocessor
- 6.2.1 Overview
- 6.2.2 Cold Fire Processor
- 6.2.3 Data Input/Output
- 6.2.4 Coldfire Microprocessor Peripherals and Serial Configuration
- 6.2.5 Power Fail Detection/Protection
- 6.2.6 Voltage Regulators
- 6.2.6.1 Input Switching Regulator
- 6.2.6.2 CF Switching Regulator
- A three output switching regulator is used to generate the three voltages that power the Cold Fire Processor and its peripheral devices. The three voltage are:
- 3.3V Powers CF54455 I/O, CPLD, RS232 interfaces, Flash Memory, Ethernet Controller
- 6.2.6.3 DSP Switching Regulator
- A three output switching regulator is used to generate the three voltages that power all circuitry associated with the Receiver and Exciter circuitry. The three voltages are:
- 3.6V Powers FPGA and DSP I/O, Rx Clock synthesizer, RF Pre Amps, TCXO, and QDUC circuit.
- 2.0V Powers the ADC circuit, the FPGA Core (1.2V), and the DSP Core (1.6V)
- 6.2.6.4 5 V Regulator
- 6.3 Power Amplifier (MRC-56500301-10)
- 6.4 Internal GNSS daughter board (optional)
- 7 Maintenance
- APPENDIX A: COMMANDS
- MESSAGE COMMANDS
- MAINTENANCE COMMANDS
- BOOT
- DATA LOGGER COMMANDS
- CR10X COMMANDS
- COMMAND
- PARAMETERS
- CR10X,GROUP,source
- CR10X,RESET
- CR10X,SCALE,type
- CR10X,SIGNATURE
- CR10X,STAT
- CR10X,TIME,source
- CR1000
- CR1000,ACQMODE,{CURRENT,ALL,LAST,N}
- CR1000,SETPTR,MM/DD/YY,HH:MM
- CR1000,INTERVAL,{off,n}
- CR1000,GROUP,{CR1000}
- CR1000,TIME,{CR1000}
- CR1000,MAXQ,nnn
- CR1000,SCALE,{CR1000,INT}
- CR1000,PUBLIC
- CR10XTD,STAT
- CR10XTD,RESET
- CR10XTD,SECURITY,xxxx,yyyy,zzzz
- CUSTID,nnnnn
- 1 – 4095
- A-Z, 0-9, -
- A-Z, 0-9, -
- A-Z, 0-9, -
- Parameter
- BOOT
- MAINTENANCE COMMANDS
- STATUS COMMANDS
- STATION CONFIGURATION COMMANDS
- APPENDIX B: FACTORY DEFAULTS
- The following is a list of MRC 565 Parameters that are installed after typing:
- To obtain a list of parameters settings in SCRIPT format for the MRC 565 type:
- APPENDIX C: EVENT PROGRAMMING
- APPENDIX D: INSTALLATION DETAILS
Page 3 MRC-565 Packet Data Radio Operations & Maintenance
EXPOSURE TO RF RADIATION
The FCC guidelines limit the maximum permitted exposure to RF radiation for Occupational/
Controlled Exposure to 1 mw/sq. cm for frequency ranges of 30-300 MHz. This limit and the
following equation for calculating field strength (obtained from OET Bulletin 65) is used to
calculate the minimum separation between humans and the transmit antenna based on MPE
S= P*G* DC/(4*
π
*R*R)
P = Transmit power in milliwatts = 100,000
G = Antenna gain referenced to an isotropic radiator
= 1.68 (2.2dbi) mobile quarter wave dipole mounted to fender/roof of automobile
= 10.0 (10.0 dbi) fixed 5 element Yagi mounted to top of fixed antenna tower
= 3.3 (5.2 dbi) fixed half wave dipole mounted to fixed antenna tower leg
R = separation required cm
DC = Maximum duty cycle of transmitter = 10 %
S = Power density = 1 milliwatt/square cm
This equation is accurate for the far field of an antenna, but will over-predict power density in the
near field. Thus, the near field MPE distances calculated here are “worst case” or conservative.
Antenna separation for mobile applications:
The typical antenna used in mobile application has a maximum antenna gain of less than 2.2 dBi
(¼ wave dipole or ½ wave dipole). To ensure safe operation the antenna must be mounted such
that the separation between the antenna and any human occupants of the vehicle exceeds 0.90
meters (36”). The best location for antenna mounting is the center of the vehicle roof. This will
provide additional RF shielding between the antenna and the human occupants that reduces the
RF exposure to levels well below that specified in FCC OET Bulletin 65.
When working on the antenna and or co-ax cable always disable the transmitter by turning its
power off.
Antenna separation for fixed applications:
For fixed applications, antenna gains and mounting techniques can vary depending on the
application. For Yagi antennas whose gain does not exceed 10 dBi, that antenna must be
mounted a minimum of 2.2 meters from any humans occupants. Lower gain antennas, such as
side mount dipoles, exhibit lower gain (5.2 dBi) allow closer separations (1.3 meters for 5.2 dBi
antennas). This will provide RF shielding between the antenna and the human occupants that
reduce the RF exposure to levels below that specified in FCC OET Bulletin 65.
When working on the antenna and or co-ax cable always disable the transmitter by turning its
power off.