Table of Contents
Related Manuals for Raveon RV-M8T
Summary of Contents for Raveon RV-M8T
- Page 1 RV-M8T / RV-M8R D a ta /P agi n g Radio Modem T e ch n ic a l M an ua l Version A7 September 2013 Raveon Technologies Corporation 2461 Impala Drive Carlsbad, CA 92010 www.raveon.com Company Confidential Raveon Technologies Corp.
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Page 2: Table Of Contents
OEM Use ............................4 Overview ....................... 5 2.1. Features............................5 Specifications ....................7 3.1. General ............................7 3.2. Transmitter Specifications (RV-M8T-xx) ..................7 3.3. Receiver Specifications ......................... 7 3.4. Interface Specifications ........................8 Electrical Inputs and Outputs ................. 9 4.1. LEDs .............................. 9 4.2. - Page 3 Symptom: Receive light blinks, but no data is received ..............40 Symptom: Long delay before transmitting ................... 41 Symptom: Cannot enter Command Mode ................... 41 Symptom: Modem appears dead......................41 Symptom: Repeater will not repeat..................... 41 Mechanical ....................42 Company Confidential Raveon Technologies Corp.
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Page 4: General Information About The Rv-M8
1.2. NOTICE There are no user-serviceable points inside this transceiver. All service work must be referred to your Authorized Service Center or Raveon Technologies Service Department. 1.3. Safety / Warning Information Blasting Caps and Blasting Areas... -
Page 5: Overview
The M8T can be configured in either a paging decoder mode or a data modem mode. The command-line interface is similar to Raveon’s other data radio products, and configuring the mode is very easy. The M8T also has a digital input pin that may be used to electrically change modem types between data modem and paging modes. - Page 6 POCSAG decoder mode operates at 512, 1200, and 2400 baud. • 1-3 programmable cap codes. • Promiscuous mode to receive all pages on the air. • Automatic and manual switching between numeric and alpha-numeric modes. • Small sized and very rugged extruded enclosure. Company Confidential Raveon Technologies Corp.
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Page 7: Specifications
3. Specifications 3.1. General Model Number, transceiver: ............. RV-M8T-xx Model Number, receive only: ............RV-M8R-xx Frequency Bands: ................-UC 450-470MHz Serial Port Baud Rates ..............1.2k, 2.4k, 4.8k, 9.6k, 19.2k, 38.4k, 57.6k, 115.2k Over-the-air baud rates ..............1200, 2400, 4800 Operating Mode ................. -
Page 8: Interface Specifications
DC current draw, standby mode .... < 150uA IO Voltage Levels ........3.3V digital logic RX and TX data .......... Transparent Async Word length ..........8 bits Format ............N, O, or E Modem handshake signals ....... RTS, CTS, CD Company Confidential Raveon Technologies Corp. -
Page 9: Electrical Inputs And Outputs
Receive and transmit audio output for factory test. Do not connect to anything. STAT2 Output to drive external dual-color LED I System Ground to M8 Backup battery input to CPU to retain memory. Not required to be connected to anything. Company Confidential Raveon Technologies Corp. -
Page 10: Heatsinking
4.4. Mounting Holes 6 mounting holes are provided on the module. For best RF performance, the M8T module should be mounted to the system ground, using metal stand-offs. Company Confidential Raveon Technologies Corp. -
Page 11: User Serial Port Commands
(receive only version) out of its serial port, and then an “OK” sequence. The “OK” sequence is a sequence of 4 characters: An “O”, “K”, <CR>, and <LF> characters (<CR> = ASCII 0D, <LF> = ASCII 0A) Company Confidential Raveon Technologies Corp. -
Page 12: Setting A Parameter
The CONFIG button is located inside the modem. Remove the rear cover, exposing the two circuit boards. The button is in the front edge of the radio module’s circuit board. The default settings that the modem will revert to when the CONFIG button is pressed are: Company Confidential Raveon Technologies Corp. -
Page 13: Exiting The Command Mode
3. Time Out. After a pre-set amount of time (60 seconds is the factory default time), the modem will automatically exit the Command Mode, and continue normal operation. Changes will not automatically be saved. This time-out duration may be set with the ATCT command. Company Confidential Raveon Technologies Corp. -
Page 14: Command Mode Commands
(flash) for this current channel number. Channel Number Select current radio channel number. This ATHN Range: 1 - 6 command does not store the channel number into EEPROM, Company Confidential Raveon Technologies Corp. - Page 15 Transmit Test Data – When issued, the modem will begin 0 = Go back to normal ATTD transmitting data. The type of data sent is set in the parameter. 1 = Random Company Confidential Raveon Technologies Corp.
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Page 16: Data Modem Mode Related Commands
IDs that the data was sent from Enable/Disable single-hop repeating – 0=any number of 0 (multi-hop ATHX repeats, 1 – unit will not repeat a packet that was already 0 or 1 repeated. Company Confidential Raveon Technologies Corp. - Page 17 I f 0, disables the repeat feature. Remote Procedure Request. Used to request execution of a command on a remote mode (over the air). See M8T System Protocol manual for information on using this feature. Company Confidential Raveon Technologies Corp.
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Page 18: Paging Receiver Related Commands
512, 1200, 2400 6.4. Factory Default Settings RV-M8T-xx (Transceiver) For the UHF M8T, model RV-M8T-UC, the main factory defaults are: General Settings Primary Protocol: (ATMT 0) ....... Packet Data Alternate Protocol: (ATMA 3) ......POCSAG WMX (WMX 0) ..........OFF Paging Settings Over-the-air paging baud rate: ...... - Page 19 Data Modem Settings: Over-the-air data modem baud rate: ....4800 baud, 2-level Serial port ............9600baud, N/8/1 Hardware flow control ........Off ID (ATMY) ............1234 Address Mask (ATMK) ........FFFF Frequencies Ch 1 ....462.2125 MHz Company Confidential Raveon Technologies Corp.
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Page 20: Using The M8T In Paging Mode
If PM is set to PM 1, then the cap codes are ignored, and the M8T will receive all paging messages. 7.2. Setting Paging Data Format Pagers are generally either numeric, alpha-numeric, or tone. Most paging transmitters specify the type of pager message they are sending, by setting the Company Confidential Raveon Technologies Corp. -
Page 21: Numeric Messages
Alphanumeric Messages When the pager receives an alphanumeric page, it outputs the charactors via its RXD output pin on the I/o connector. The baud rate of the serial port is set with the ATBD command. Company Confidential Raveon Technologies Corp. - Page 22 The WMX protocol may be enabled with the modem in the POCSAG mode. This allows the user to easily read the ID that was decoded by the POCSAG receiver. Details about WMX and code examples are on the Raveon website at www.raveon.com/wmx...
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Page 23: Using The M8T - Packet Data Mode
Error Correction Automatic error correction may be used. M8T modems incorporate an optional ARQ method to re-transmit packets with error, to ensure the user’s data is delivered error-free. Company Confidential Raveon Technologies Corp. -
Page 24: Setup
3. Connect a computer terminal, or PC computer running HyperTerminal, to the 9-pin I/O connector. The factory default serial ports settings are 9600 bps, 8 data bits, 1 stop, no parity. Company Confidential Raveon Technologies Corp. -
Page 25: Programming Channels And Frequencies
3. Review the frequency setting with the ATFT, ATFR, or ATFX command. To see a list of all of the channels , enter ATF. 4. To change the radio channel, use the ATHP x command while the modem is in the command mode. Company Confidential Raveon Technologies Corp. -
Page 26: Data Transmission
Company Confidential Raveon Technologies Corp. -
Page 27: Group Numbers
Destination Address, and see if it matches their Unit Address. If it does match, the receiving modem outputs the data it received via its serial port. If it does not match, the receiving modem discards the data, and does not send it out the serial port. Company Confidential Raveon Technologies Corp. -
Page 28: Setting A System-Wide Address
Effective Unit Address. The Effective Unit Address is compared to the Effective Destination Address, and if the two are identical, the data will be received. Note: Logically 1 = 1, 0 = 0, 0 = 0, 1 = 0 Company Confidential Raveon Technologies Corp. -
Page 29: Addressing Examples
FFFF requires that all digits in the address match. . Example 3 (able to receive a data from a group, 1230 – 123F) Sending to Destination Address = 1236 Receiving M8T Unit Address = 1234 Receiving M8T Address Mask = FFF0 Company Confidential Raveon Technologies Corp. -
Page 30: Store-And-Forward Repeating
Data is transmitted over-the-air in bursts called packets, and each packet has the Unit ID of the M8T that sent the data and the Destination ID of the unit that the data is intended for. Company Confidential Raveon Technologies Corp. - Page 31 C, and is configured to repeat all messages to/from G. The following table illustrates one possible way the M8s could be programmed to accomplish this type of system. Company Confidential Raveon Technologies Corp.
- Page 32 In other words, all transmissions from To view the Repeater Table, use the ATX command, with no parameter. To view a single entry in the table, use the ATXn, where n=1, 2, 3, or 4. Company Confidential Raveon Technologies Corp.
- Page 33 0. For example, to disable entry 1, use the ATX1 0 0 0 0 command. There can be an issue with regard to store-and-forward repeating and busy channels, particularly on polled systems. Raveon’s M8T wireless modem has a number of provisions in it to make store-and-forward repeating work smoothly.
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Page 34: Debug Related Commands
If it does, it answers with a response transmission, containing its ID and the signal strength of the reception. . STAT Display statistics of how the modem is working. Company Confidential Raveon Technologies Corp. -
Page 35: M8T Diagnostic Provisions
Compile date and time – Returns the data and the time that the Date and time firmware was compiled. Run Time – Returns the amount of time that the modem has been Run time display powered up and running. screen Reset all statistics counters Company Confidential Raveon Technologies Corp. -
Page 36: Tune-Up And Alignment
All RF modems in the 2 = 2400 7 = 5142 2L 3 = 4800 8 = 9600 4L network must use the same over-the-air baud rate. 4 = 8000 4L 9 = 2000 2L Company Confidential Raveon Technologies Corp. -
Page 37: Center Frequency
1. Set-up a service monitor to monitor the FM deviation of the transmitted signal on an oscilloscope. The frequency response of the demodulated FM signal must be greater than 10Hz to 5kHz without any de-emphasis. Company Confidential Raveon Technologies Corp. -
Page 38: Rx Carrier Detect
If RF is present, but it is voice or some non-data single, then the CD pin is negated. Mode 2 - CD ON In this mode, the CD pin is always asserted. Company Confidential Raveon Technologies Corp. - Page 39 The CD signal will normally stay low (near 0 volts), and when the Output Data Framing takes place, it will go high (about 3V). If Output Data Framing is enabled, any other Carrier Detect and flow control output configuration is ignored. Company Confidential Raveon Technologies Corp.
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Page 40: Troubleshooting
Try all possible baud rates, and see if one of them works with the modem. Alternately, remove the rear cover of the modem, and press the CONFIG Company Confidential Raveon Technologies Corp. -
Page 41: Symptom: Long Delay Before Transmitting
Symptom: Repeater will not repeat. Solution Verify the repeater’s Unit ID is unique. An RV-M8T configured to be a repeater will not repeat messages it originated. If other units in the system have the same ID as the repeater, the repeater will not repeat them because it thinks the it originated the transmission. -
Page 42: Mechanical
13. Mechanical A drawing is shown below. Company Confidential Raveon Technologies Corp.