Raveon Daisy RV-M50-E User manual

RV-M50-E
Daisy ISM-NA Wireless Modem
and GPS Transponder
Technical Manual
Revision A1 (November 2015)
Raveon Technologies Corporation
www.raveon.com | www.ravtrack.com

RV-M50-E Technical Manual
2
Table of Contents
1. Overview ............................................................................................................................................... 4
1.1 Input and Output .......................................................................................................................... 4
Universal Wireless Radio Connector..................................................................................................... 4
LED ........................................................................................................................................................ 4
RF Antenna Connection ........................................................................................................................ 5
GPS Antenna Connection...................................................................................................................... 5
2. Configuring the Daisy ISM..................................................................................................................... 5
2.1 Overview ....................................................................................................................................... 5
2.2 Command Mode ........................................................................................................................... 6
Command Mode Encoding and Line Format ........................................................................................ 6
Entering Command Mode..................................................................................................................... 6
Exiting Command Mode........................................................................................................................ 6
2.3 Using Commands .......................................................................................................................... 7
2.4 Configuration Commands ............................................................................................................. 7
2.5 GPS Commands............................................................................................................................. 9
2.6 Software Upgrades ........................................................................ Error! Bookmark not defined.
2.7 Factory Default Settings.............................................................................................................. 11
3. Operational Modes and Configuration ............................................................................................... 12
3.1 Channel Configuration and Virtual Channelization.....................................................................12
About Virtual Channelization.............................................................................................................. 12
General Configuration.........................................................................................................................12
Channel Center Frequency.................................................................................................................. 12
3.2 Channel Bandwidth and Transmit Power ................................................................................... 12
Channel Data Rate .............................................................................................................................. 13
Channel Occupancy............................................................................................................................. 13
3.3 Data Transmission....................................................................................................................... 13
3.4 Position Transmission ................................................................................................................. 13
Idle Transmission Rate ........................................................................................................................13
Active Transmission Rate ....................................................................................................................13

RV-M50-E Technical Manual
3
Report Format.....................................................................................................................................14
Local Position Information.................................................................................................................. 14
Deep Sleep ..........................................................................................................................................14
3.5 Data Reception............................................................................................................................ 14
Serial Port Data ................................................................................................................................... 14
GPS Position and Status ......................................................................................................................14
3.6 Device Addressing....................................................................................................................... 15
Security Key............................................................................................ Error! Bookmark not defined.
ID Addressing Basics............................................................................................................................15
3.7 Local NMEA data from the internal GPS.....................................................................................16
4. RV-M7 Diagnostic Provisions ..............................................................................................................16
4.1 Status and Statistics Command................................................................................................... 16
4.2 ATST Command........................................................................................................................... 16
4.3 ATST1 Command (GPS Statistics)...............................................................................................17
4.4 ATST3 Command.........................................................................................................................17
4.5 ATST4 Command.........................................................................................................................17
5. Troubleshooting.................................................................................................................................. 18
5.1 Symptom: Unit will not receive.................................................................................................. 18
5.2 Symptom: Receive light blinks, but no data is received ............................................................ 18
5.3 Symptom: Long delay before transmitting ................................................................................18
5.4 Symptom: Cannot enter Command Mode.................................................................................18
6. Mechanical.......................................................................................................................................... 19
7. NOTICE ................................................................................................................................................19
7.1 Safety Training information ........................................................................................................19
8. FCC Compliance Information ..............................................................................................................19

RV-M50-E Technical Manual
4
1. Overview
The Daisy Wireless Modem is a secure, high-performance, long-
range wireless access card and GPS transponder. Two data
interfaces are available, transparent-link mode and Raveon’s WMX
Wireless Packet Format. Modem operation is virtually transparent
to the user and the configuration of the modem is done easily
through the user serial port.
As a GPS transponder, configuration is as simple as setting a report
rate. Many options are available to create a customized GPS transponder by adjusting reporting rules
and detail levels of GPS reports.
For security, AES-128 encryption is available.
While easy to use out-of-the-box, the Daisy Modem’s programmability makes it extremely versatile.
Most parameters may be reconfigured to optimize for specialized operations, extended range or higher
data throughput.
1.1 Input and Output
1.1.1. Universal Wireless Radio Connector
Raveon utilizes a universal connector configuration on many of its radio modem modules, so the Z50 is
plug-in compatible with dozens of other radio modems. The UWRC connector pint-out is as shown
below
20- Pi n U W RC I n te r f a ce P o rt
Pin #
Function
Description
1
GND
Ground
2
VCC
DC Input
3
CD
Carrier Detect Out.
4
TX On
Pin is High when module is transmitting. Low when off,
receiving, or sleeping.
5
Data In (TXD)
Serial transmit data input.
6
Data Out (RXD)
Serial receive data output.
7
Enable
Low to shut down the module. High to enable it.
8
Sleep
CPU Sleep input. Put in low-power fast-startup mode.
9
CTS
Clear to send output. Indicates state of internal buffers.
10
RTS
RTS input for serial flow control.
11
NC
No Connection
12
VDIG
3.3V output. Limit current draw on this power source to 50mA.
13
IOA
IO port A, USB DP
14
IOB
IO port B, USB port, DM
15
IOC
IO port C
16
STAT1
Status IO 1
17
NC
No Connection
18
STAT2
Status LED out
19
GND
System Ground
20
V-BACK
Optional Backup Battery In

RV-M50-E Technical Manual
5
The primary connector is fully pin-for-pin compatible with M8 UHF, VHF, 220MHZ modems. V50 ISM
band radio modems.
1.1.2. LED
By default, the LED will indicate the following:
Green: Radio has received a packet
Red: Radio is transmitting a packet
Flashing Orange: GPS is locking (flashing will cease when GPS has locked)
Many commands modify the operation of the LED, including disabling it entirely.
1.1.3. RF Antenna Connection
The RF Antenna Connection is an MMCX
1.1.4. GPS Antenna Connection
If installed, the GPS Antenna Connection is a u.FL (sometimes known as IPEX)
2. Configuring the Daisy ISM
2.1 Overview
The UART serial port on the unit is used to send and receive data over the air, as well as to configure the
RF modem. In standard transparent-link operation, the user sends serial data into the TxD pin of the
user port, and this data is transmitted over the air. Received data from another RF modem is output to
the user via the RxD pin of the user port. This is the default operating condition of the RF modem. No
special characters, hardware control lines, or timing is required to operate the Daisy Modem.
By default, the serial port is set to 38400 baud, 8 data bits, 1 stop bit, no parity bit.

RV-M50-E Technical Manual
6
If the Daisy is configured as a GPS transponder, the serial port need not be connected to anything. The
internal GPS will initiate the transmissions of position and status. The serial port may be connected to
receive other GPS reports or send and receive additional data.
There is also a Command Mode used to program and configure the modem. In the Command Mode, the
modem accepts commands via the serial port TxD pin. The commands can be used to change certain
internal parameters of the modem as well as to read-out the current configuration and diagnostic
statistics.
The modem also supports Raveon’s Wireless Modem Exchange (WMX) protocol for commanding and
messaging. WMX is ideal for fully automated control and tighter integration. For more information, see
the WMX Protocol Description document and the Raveon Tech Note “Rapid Radio Configuration using
WMX”.
2.2 Command Mode
Command Mode is used to program and configure the modem. This mode is separate from data mode
and will not transmit received data over-the-air, instead executing commands detailed in this manual.
1.1.5. Command Mode Encoding and Line Format
In Command Mode, all characters are ASCII encoded. All output lines will use the standard network line
ending, CR+LF (ASCII 0x0D followed by ASCII 0x0A).
Inputs lines may use either CR, LF or CR+LF line endings.
1.1.6. Entering Command Mode
The modem may be put into a Command Mode, by entering a sequence of three plus characters (+++),
called the Entry Sequence.To keep the modem from unintentionally entering the Command Mode
because of the Entry Sequence occurring in a stream of data entering the modem, there must be a
pause in the data stream before the Entry Sequence as well as a pause afterwards. If either pause is
missing, the modem will not enter the command mode. The pause length is configurable, by default it is
500ms.
When the modem first enters the Command Mode, it will output the base model number along with the
OK sequence:
RV-M50
OK
Once in command mode, the instructions in the following sections can be followed to continue radio
configuration.
1.1.7. Exiting Command Mode
To exit command mode and return to data mode, the command EXIT may be used.
Alternatively, command mode will timeout after a configurable amount of time, by default 60 seconds.

RV-M50-E Technical Manual
7
2.3 Using Commands
To execute a command, send the command name and any parameters separated by spaces, followed by
a line ending. For example, to use the ATDT command to set the destination address to 1234, send:
ATDT 1234<LF>
Some commands may output result information on lines following the command, but the output will
always terminate with either the OK sequence (introduced in the previous section) or the ERROR
sequence (ERROR<CR><LF>).
Some commands may have different results depending on the number of parameters. In general, a
command that sets a parameter(s) can read back its values by issuing the command with no parameters.
To get on-line help with a command, enter the command with a question mark at the end.
To see a list of all commands, use the HELP command.
2.4 Configuration Commands
The following commands are standard Raveon commands implemented by the modem.
Command
Command Description
Parameters
Factory
Default
ATAT
Silence AFTER Sequence - Sets period of silence after the
command sequence characters in mS.
Range:0 –1000
(mS)
500
ATBD
Baud Rate –Sets serial com port baud rate (bps). Over-the-
air (throughput) baud rate is set with ATR2 command.
If a PC’s serial baud rate is set higher than the fixed over-the-
air baud rate of the module, hardware handshaking may be
required.
Range: 0 –7
0 = 1200 5= 38400
1 = 2400 6=57600
2 = 4800 7=115200
3 = 9600
4 = 19200
5
ATBT
Silence BEFORE Sequence –Sets period of silence before
the command sequence character in mS.
Range: 0-1000
mS
500
ATBW
Set/Read Channel Bandwidth
See section 3
ATCT
Command Time Out –If no valid commands have been
received via the serial port within this time period (in
milliseconds), modem returns to normal operation mode from
Command mode. If the CONFIG button inside the M8 is
pressed, this parameter will be automatically set to 60000.
Range: 100-60000mS
60000

RV-M50-E Technical Manual
8
ATDT
Destination Address–Sets address of the modem to send
data to.
Range: 0-FFFF
0001
ATF
Display frequencies –Display all of the frequencies
programmed into all of the channel memories.
N/A
ATFX
Frequency
See section 3
ATHP
Channel Number –Select channel number to configure
See section 3
ATIC
Read Current Draw Read the current draw in mA. Accuracy
is within 20% of actual current draw.
Range: 0-9999
N/A
ATL
Enable/Disable the LEDs –1 = LEDs always off. This
reduces some power consumption. 0 = LED operate normally.
0 or 1
0
ATMK
Address Mask –Configures local and global address space.
Each digit may be a 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,or F. In
most applications, this is kept at FFFF.
Range: 0000 - FFFF
FFFF
ATMY
Unit Address –Configures the individual; address for this unit.
Each digit may be a 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,or F. Note:
FF is interpreted as a group. See addressing section.
Range: 0000 - FFFF
1234
ATPC
Read TX Current. Read the device’s current draw during the
last transmission, in mA
0-9999
-
ATR2
Over-The-Air bit rate
See section 3
R3
Serial Port Time Out –The time in milliseconds for the serial
port to time out. When data is entering the serial port, and
this amo0unt of time passes with no more data, the modem
will begin to transmit the data over the air.
Range: 1 - 999
20
20mS is
the default.
ATRQ
Receiver Signal Level –Reads the Receiver Signal strength
this instant, and returns the level in dBm.
Range: -40 to –130 (dBm)
-
ATRS
RSSI (Receive Signal Strength Indicator) –Returns the
signal level of last received packet. The reading is in dBm.
Usable for relative comparison of signals, but absolute value
is within10dB at -90dBm.
No parameters. Returns a
number: -50 to –140
(dBm) varies by model.
none
ATSL
Serial Number –Reads and returns a unique serial number
for this unit.
Read Only
1 - 999999999
unique
ATSH
Show –Display the configuration of the modem. This will
return a page of ASCII characters, showing the main
configuration parameters.
none
None
ATST
Statistics –Show the unit’s operational statistics. See
Statistics section of user manual.
None
ATTE
Read product temperature –Read the internal temperature
of the unit’s circuit board in degrees Celsius.
-40 to +99
-
ATVB
Read DC input Voltage–Returns the DC input voltage
reading, in mV (12500 = 12.5VDC input).
None
None
ATVR
Firmware Version –Returns firmware version currently
loaded on the module.
Read Only, 3 characters
none
AT&F
Restore Factory –Restore to the factory configuration
None
PING
Ping another modem. Format is PING xxxx, where xxxx is
the ID of the modem to ping.
XXXX
-
SHOW
Show/display an overview of the radio’s configuration.
None
-
MODE
Read Model number. Read the model number.
None
-

RV-M50-E Technical Manual
9
L
BAND
Show/display the radio band. Displays the frequency band
that the radio is configured for, along with the upper and lower
frequency, in MHz. BB is the band code, lll is the lower
frequency in MHz, and uuu is the upper frequency in MHz.
None
BB, lll, uuu
CONFIG
Show Configuration. Display the settings of every parameter
in the unit. If the parameter is 1, then the help text is not
displayed, If the parameter is 2, the configuration is output in
strictly the format used to program another unit.
None, 1, 2
-
AESKEY
Set the AES encryption key
2.5 GPS Commands
The following commands are available if the GPS option is installed.

RV-M50-E Technical Manual
10
Command
Command Description
Parameter
s
Factory
Default
GPS
GPS Operation Mode. Set the Operating
mode.
1 –9
1
GPS&F
Reset all GPS parameters
-
-
IDLERATE
IDLE TX Interval. Set the number of
seconds between position transmissions
when the unit is idle (has not moved more
than TRIGDX meters).
0-9999
seconds
10
NMEAOUT
Enable/Disable NMEA messages.
Configures output standard NMEA
messages (GGA, GLL, RMC) out its serial
port. NMEAOUT 0 disables the messages.
NMEAOUT 1 enables them.
0, 1
1
NMEAMASK
Set/Read NMEA message bit mask. The
NMEAMASK register contains configuration
bits to enable various NMEA standard
messages from the internal GPS receiver
that will be sent out the serial port. The
parameter is the decimal integer value of
the mask.
0-9999
258
(RMC, GLL,
GAA)
NMEARATE
Set/Read NMEA message rate. Set/read
the number f seconds between NMEA
messages from the internal local GPS.
1-99
5
TRIGDX
Distance trigger. Set a distance (in
meters) threshold beyond-which the unit will
transmit its position and status. If set to 0,
the unit always reports at the TXRATE. If
set to an distance greater than zero, then
the unit reports at the TXRATE intervals if it
has moved this distance since the last
report. If it has not moved, it will still report
its position, but at the rate set by
IDLERATE. If IDLERATE is set t 0, then
the unit will not report its position when not
moving.
0-999
0
TRIGSPEED
Speeding Report. Set a speed (in
kilometers/hour) threshold above-which the
unit will begin reporting its position and
status. Set to 0 to disable this feature.
0-999
0
TXRATE
GPS Report Rate. Set number of seconds
between GPS reports. This is also the rate
at which the internal GPS will measure
position, speed, etc. Even if the unit is not
moving, the GPS periodically measures
position and speed to determine if it has
triggered a speed or position transmission.
1 - 9999
10
TRIGSLEEP
Set up sleep/wake triggers for GPS
0-15
0

RV-M50-E Technical Manual
11
2.6 Factory Default Settings
1.1.8. Standard Factory Settings
Channel
Center Frequency
Bandwidth
Symbol Rate
1
916.3
500kHz
37.50 kbps
2
919.6
500kHz
37.50 kbps
3
922.9
500kHz
37.50 kbps
Serial port ................................................................................38400 baud, N/8/1
ID (ATMY).................................................................................1234
1.1.9. GPS Option Factory Settings
Report Interval.........................................................................30 s
Trigger Distance....................................................................... 9998

RV-M50-E Technical Manual
12
3. Operational Modes and Configuration
3.1 Channel Configuration and Virtual Channelization
1.1.10. About Virtual Channelization
With Virtual Channelization, the M50 will operate in a proprietary, decentralized, 1-3 channel
frequency-agile manner. This unique feature allows networks of M50 radios to operate with no central
network controller and no requirement that all radios are in range of each other. This enables the
reliability of multiple channels in the ISM band while allowing free-form network architectures as
required.
1.1.11. General Configuration
Under Virtual Channelization, a number of configuration options are selectable:
1. Channel frequencies
2. Channel bandwidth
3. Channel data rate
To configure any individual channel, issue ATHP <channel>, where <channel> ranges from 1-3 to select
the channel. ATH will list the configuration of all channels. Once a channel to configure is selected, the
commands below will modify the parameters of the channel.
FCC regulations require that the M50 not allow certain modes of operation. If the radio is placed in a
non-compliant configuration, this will be indicated upon entering Command Mode or when issuing the
SHOW command. The SHOW or ATH commands will detail what action was taken to correct the non-
compliant configuration.
3.2 Channel Center Frequency
Channel frequency is set with ATFX <frequency>, where <frequency> is expressed in MHz, e.g. 915.5. In
North America, channel center frequency may be set between 902.5 - 927.8MHz for 125kHz channels
and between 902.7 - 927.5MHz for 500kHz channels.
To completely disable a channel, set ATFX 0. Note that disabling a channel will cause non-compliant
configurations if 125kHz channels are in use. All three channels must be enabled if 125kHz channels are
in use, and exactly two channels must be 125kHz.
Note also that a frequency separation of 600kHz is enforced for 500kHz channels and 200kHz for 125kHz
channels.
3.3 Channel Bandwidth and Transmit Power
Channel bandwidth is set with ATBW <bandwidth>, where <bandwidth> is set according to the table
below:
ATBW Setting
Channel Bandwidth
Transmit Power
0
125kHz
21dBm

RV-M50-E Technical Manual
13
2
500kHz
26dBm
To comply with FCC regulations, 125kHz channels may only be used if exactly one 500kHz channel and
exactly two 125kHz channels are in use.
1.1.12. Channel Data Rate
Channel data rate is set with ATR2 <rate>, where <rate> is set according to the table below:
ATR2 Setting
Bit Rate for 125kHz Channels
Bit Rate for 500kHz Channels
6
9.37 kbps
37.50 kbps
7
5.46 kbps
21.87 kbps
8
3.12 kbps
12.50 kbps
9
1.75 kbps
7.03 kbps
10
3.90 kbps
11
2.14 kbps
12
1.17 kbps
Note that adjusting data rate will affect maximum allowable packet size.
1.1.13. Channel Occupancy
Regardless of the number of channels employed, a channel may not be used for longer than 400mS in a
period of 400mS * channel count, to comply with FCC 15.247(f). The modem automatically enforces this,
and may temporarily delay a transmission to comply as needed.
3.4 Data Transmission
To transmit data, send one or more bytes of data into the serial port of the modem. When a full packet
of data has been collected into the internal buffer of the modem; there is a pause in the data per ATR3;
or the maximum packet size is reached, the modem will automatically key its transmitter, and send the
data over the air.
3.5 Position Transmission
Position Transmission is enabled by setting either TXRATE or IDLERATE to a nonzero value.
When position transmission is enabled, the device will send its position and other status information
over-the-air automatically, per the configurations below.
1.1.14. Idle Transmission Rate
IDLERATE sets the idle reporting interval. This should be set to the longest acceptable time between
position reports. Conditions (detailed in the following sections) can cause the modem to transmit faster
than the IDLERATE. Set to 0 will disable any idle reporting.
1.1.15. Active Transmission Rate
TXRATE sets the active transmission rate. This is the rate the modem will send its position when one of
the conditions below arises, which can be enabled or disabled individually:
1. Motion
2. Distance Traveled

RV-M50-E Technical Manual
14
3. Speed
See the command section for details on how to configure these values.
1.1.16. Report Format
A number of output report formats are available, with the most common being $PRAVE, a customized
format for wireless GPS transponders. See the OUTPUT command for more detail.
1.1.17. Local Position Information
The NMEAOUT, NMEARATE and NMEAMASK commands will configure the unit to output its GPS
position locally over the user serial port.
1.1.18. Deep Sleep
Use the TRIGSLEEP command to configure deep sleeping of the radio.
3.6 Data Reception
1.1.19. Serial Port Data
When the modem receives data over the air, it checks it for errors, and if it is error-free, it will send it
out the serial port. Again, the serial port may be set to any baud rate the user wishes, and the radio
receiver and transmitter will continue to operate independently of the baud rate.
1.1.20. GPS Position and Status
When the modem receives a position report and status from another modem, it will send this
information out the serial port, formatted in Raveon’s $PRAVE message format.
Change the position report output format with the OUTPUT x command. Enable/disable the local GPS
NMEA data with the NMEAOUT x command (0 off, 1 on)
The position/status messages that the modem is able to send out of its serial port are:
Message
Format
Description
OUTPUT x
Parameter/setting
$GPWPL
NMEA WayPoint List. This message is commonly used to
share waypoint locations among GPS units. The modem
can output this message when it receives a position report.
A GPS display connected to it, should put a waypoint on its
screen, and in its database, at reported location.
OUTPUT 3
$PRAVE
Raveon Position & Satus. This message is used by Raveon
and third-party applications for tracking location and status
information.
OUTPUT 1
$GPTLL
NMEA Target Lat Long. This message is commonly sent by
marine RADAR receivers to notify plotting devices of the
location of a RADAR target. A plotter or display connected
OUTPUT 2

RV-M50-E Technical Manual
15
to the modem that supports the TLL message should put an
icon on its screen at the location specified. The icon name
is the MYID of the modem that transmitted its position over
the air.
$GPGGA
NMEA GPS Position Fix Data. This message is the standard
position message from a GPS receiver.
NMEAOUT 1
$GPGSV
NMEA Satellites in view. This message is the standard
message to indicate the number of satellites in view, and
their signal quality.
NMEAOUT 1
3.7 Device Addressing
1.1.21. ID Addressing Basics
ID addressing is used to differentiate one modem from another. Each must have a unique number
programmed into them, so that when a position report is received, the modem that sent the message
can be identified. This is called the MYID of the unit that sent the message.
Each modem has a MYID programmed into it, and is represented as a 4 digit hexadecimal number.
Addresses between 0001-FFFF are valid. The Unit Address is programmed with the MYID xxxx
command, and the ID of the destination modem it sends its messages to (the Destination Address) is
configured with the ATDT xxxx command.
The factory default MYID in all modems is 1234, and 1234 is also the default for the Destination ID also.
The default Address Mask is F000, which means the modem will receive a transmission from any other
modem as long as the first digit of the destination address matches, in this case, is a 1.
Make sure you set the MYID of each modem in your system to a different number.
For example, to set the ID of your modem to 17, enter:
MYID 17 <enter>
To set your modem to send its position and status data to modem number 1, enter:
ATDT 1 <enter>
To set your address mask to receive all messages from units with IDs 1-999, and exclude 1000-9999,
enter
ATMK F000 <enter>

RV-M50-E Technical Manual
16
3.8 Local NMEA data from the internal GPS
The modem may be configured to output standard NMEA 0183 GPS messages from its internal GPS
receiver. For GPS tracking, these GPS transponders can receive GPS position reports from other radios,
and they may also be configured to output their own GPS location via their serial port.
The following NMEA messages are available
NMEA Message
Bit Number
(zero based)
Bit Mask
(hex format / decimal)
GGA
0
0×001 / 1
GLL
1
0×002 / 2
RMC
9
0×100 / 256
You can change the NMEAMASK parameter to modify with of the NMEA sentences will come out the
serial port.
For example, to have only the RMC sentence come out the serial port, use the following command”
NMEAMASK 256
To have the GGA and GLL come out the serial port use this command:
NMEAMASK 3
The NMEAMASK parameter is the sum of all of the decimal values of the individual bits corresponding to
the NMEA messages.
4. Diagnostic Provisions
4.1 Status and Statistics Command
Diagnostic information is read using AT commands, while the unit is in Command Mode. Refer to the
section “User Serial Port Commands” to learn how to put the modem into Command Mode.
4.2 ATST Command
The ATST command will return the following information:
STATISTICS
Good RX Packets: nnn (packets received over the air with no bit-errors and correct address)

RV-M50-E Technical Manual
17
With Bad CRCs: nnn (over-the-air packets with bit errors that were discarded)
Bytes received: nnn (number of bytes this modem received, and sent out its serial port)
Bytes transmitted: nnn (number of bytes this modem received via the serial port, and transmitted
over the air)
Packets send: nnn (number of packets this modem has transmitted over the air.
Retransmissions in the ARQ mode are not counted)
Pkts last minute: nnn (Number of packets received during the last minute)
OK
If there is a hardware problem, there may be one or more hardware error messages listing the error
types (CPU Exceptions, OS Rebooted, or Fatal OS failures). Consult the factory if any of these messages
ever appear.)
4.3 ATST1 Command (GPS Statistics)
The ATST 1 command, will return various information regarding the operation of the GPS features.
4.4 ATST3 Command
The ATST3 command, will return the time and date the firmware was compiled.
4.5 ATST4 Command
The ATST4 command will return internal timers that tell how long the modem has been powered up and
running. All of these timers restart a 0 upon power up.
Run time:
Years: nnn (number of years running)
Days: nnn (number of days running, resets to 0 after one year)
Hours: nnn (number of hours running, resets to 0 after 23 hours, 59 minutes, 59 seconds)
Min: nnn (number of minutes running, resets to 0 after 59 minutes, 59 seconds)
Sec: nnn (number of seconds running, resets to 0 after 59 seconds)
Uptime: nnn (number of seconds running. Does not reset.
OK

RV-M50-E Technical Manual
18
5. Troubleshooting
5.1 Symptom: Unit will not receive
Solution #1: Verify that the unit is on the correct RF channel. If it is, the Status LED should blink green
every time another modem tries to transmit to it. If the Status LED does not blink when it should be
receiving, it is on the wrong RF frequency.
Solution #2: If the Status LED blinks green, verify that the Unit Address of the sending modem matches
the unit address of the receiving modem. If this is OK, verify that the over-the-air baud rate of all
modems is the same (ATR2 command).
Solution #3: Verify the KEYPHRASE is correct. If encryption is used, the KEYPHRASE is set to a unique
word, and must be the same in all radios in the system. If it is not used in the radio system, then the
KEYPHRASE in all units must be disabled or left at the factory default. To disable encryption, use the
KEYPHRASE 0 command. The factory default KEYPHRASE is RAVEON, in all capital letters.
Solution #4: Verify the Receiver circuits are powered. The receiver circuitry by default is disabled (ATSM
4). If you wish to receive data with the modem, you must enable the receiver circuits, increasing the
current draw a little bit. ATSM 0 enables the receiver circuits.
5.2 Symptom: Receive light blinks, but no data is received
Solution #1: Verify the serial port baud rate. This is difficult if it is set wrong, because you cannot enter
the command mode to check it. 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 button. This will
force the modem into Command Mode, as well as set the serial port to 9600 baud, 8 data bits, one stop,
and no parity. If the baud-rate was OK, verify the AT, BT and CT times, that they are long enough for you
to enter the +++ string.
Solution #2: Verify the KEYPHRASE is correct. If encryption is used, the KEYPHRASE is set to a unique
word, and must be the same in all radios in the system. If it is not used in the radio system, then the
KEYPHRASE in all units must be disabled or left at the factory default. To disable encryption, use the
KEYPHRASE 0 command. The factory default KEYPHRASE is RAVEON, in all capitol letters.
5.3 Symptom: Long delay before transmitting
Solution #1: Verify that serial port timeout is OK. The ATR3 command sets the number of milliseconds
that the modem will look for in the serial input data stream. If a pause greater than this value happens,
the modem will transmit. If the ATG0 parameter is set very large, say 2000, this means 2 seconds, and
the modem may simply be waiting a long time. Typical settings for this parameter are 20 (20mS).
5.4 Symptom: Cannot enter Command Mode
Solution #1: Verify the serial port baud rate. This is difficult if it is set wrong, because you cannot enter
Command mode to check it. 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 button. This will force the

RV-M50-E Technical Manual
19
modem into Command mode, as well as set the serial port to 9600 baud, 8 data bits, one stop, and no
parity. If the baud-rate was OK, verify the AT, BT and CT times, that they are long enough for you to
enter the +++ string.
Solution #2: Handshaking. You may have hardware handshaking enabled on your terminal program, but
the hardware or cable may not support it. Disable hardware handshaking on your terminal program to
verify this is the issue.
Solution #3: Deep Sleep. If the TXRATE is greater than 60 seconds, the unit may be put into a very deep
sleep mode, and will not enter the command mode. You must first turn the unit off, and back on to put
it into Command mode.
6. Mechanical
7. 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.
7.1 Safety Training information
Always use this radio with the antenna supplied with it. This radio is restricted to occupational use.
Work related operations are permitted only when the radio operator has the knowledge to control the
exposure conditions of its passengers and bystanders by maintaining the minimum separation distance.
Failure to observe these restrictions may result in exceeding the FCC RF exposure limits.
8. FCC Compliance Information
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.

RV-M50-E Technical Manual
20
Changes or modifications not expressly approved by the party responsible for compliance could void the
user’s authority to operate the equipment.
NOTE: The manufacturer is not responsible for any radio or TV interference caused by unauthorized
modifications to this equipment. Such modifications could void the user’s authority to operate the
equipment.
The Federal Communications Commission (FCC), with its action in ET Docket 93-62, has adopted a safety
standard for human exposure to Radio Frequency (RF) electromagnetic energy emitted by FCC-certified
equipment. This product meets the uncontrolled environmental limits as stated in OET-65C (01-01)
when operated in accordance with the operation guidelines described in this manual. Proper operation
of this radio device according to the instructions in this publication will result in user exposure
substantially below the FCC recommended limits.
This equipment generates, uses, and radiates radio frequency energy, and if not installed and used in
accordance with the instructions, may cause harmful interference. However, there is no guarantee that
interference will not occur. If this equipment does cause interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to correct the
interference by one of the following measures:
•Reorient or relocate the receiving antenna.
•Increase separation between the equipment and receiver.
•Connect the equipment to an outlet on a circuit different from which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician.