Raveon RV-M8T User manual

Company Confidential 1 Raveon Technologies Corp.
RV-M8T / RV-M8R
Data/Paging
Radio Modem
Technical Manual
Version A7
September 2013
Raveon Technologies Corporation
2461 Impala Drive
Carlsbad, CA 92010
www.raveon.com

Company Confidential 2 Raveon Technologies Corp.
Table of Contents
1. General Information abo t the RV-M8 ........................................................... 4
1.1. Congrat lations! ............................................................................................................................. 4
1.2. NOTICE ......................................................................................................................................... 4
1.3. Safety / Warning Information ......................................................................................................... 4
1.4. OEM Use ....................................................................................................................................... 4
2. Overview ....................................................................................................... 5
2.1. Feat res......................................................................................................................................... 5
3. Specifications ................................................................................................ 7
3.1. General .......................................................................................................................................... 7
3.2. Transmitter Specifications (RV-M8T-xx) ........................................................................................ 7
3.3. Receiver Specifications ................................................................................................................. 7
3.4. Interface Specifications .................................................................................................................. 8
4. Electrical Inp ts and O tp ts ......................................................................... 9
4.1. LEDs .............................................................................................................................................. 9
4.2. I/O Pino t ....................................................................................................................................... 9
4.3. Heatsinking .................................................................................................................................. 10
4.4. Mo nting Holes ............................................................................................................................ 10
5. User Serial Port Commands ........................................................................ 11
5.1. Overview ...................................................................................................................................... 11
5.2. Command Mode .......................................................................................................................... 11
5.3. Setting a Parameter ..................................................................................................................... 12
5.4. Reading a Parameter ................................................................................................................... 12
5.5. CONFIG B tton ........................................................................................................................... 12
5.6. Exiting the Command Mode......................................................................................................... 13
6. Command Mode Commands ....................................................................... 14
6.1. General Command Common to Data Mode and Paging Mode.................................................... 14
6.2. Data Modem Mode Related Commands ...................................................................................... 16
6.3. Paging Receiver Related Commands .......................................................................................... 18
6.4. Factory Defa lt Settings............................................................................................................... 18
7. Using the M8T in Paging Mode ................................................................... 20
7.1. Setting Cap Codes ....................................................................................................................... 20
7.2. Setting Paging Data Format......................................................................................................... 20
7.3. N meric Messages ...................................................................................................................... 21
7.4. Alphan meric Messages.............................................................................................................. 21
8. Using the M8T – Packet Data Mode ............................................................ 23
8.1. Set p ........................................................................................................................................... 24
8.2. Programming Channels and Freq encies ................................................................................... 25
8.3. Data Transmission ....................................................................................................................... 26
Serial Port Ba d Rate .......................................................................................................................... 26
B sy-Channel Lock O t ....................................................................................................................... 26
8.4. Addressing (Packetized Mode only) ............................................................................................ 26
Addressing Basics ............................................................................................................................... 26
Gro p N mbers ................................................................................................................................... 27
Hexadecimal N mbers......................................................................................................................... 27
Setting A System-Wide Address .......................................................................................................... 28
Broadcast Transmissions ..................................................................................................................... 28
The Address Mask ............................................................................................................................... 28
Addressing Examples: ......................................................................................................................... 29
8.5. Store-and-Forward Repeating ..................................................................................................... 30
A tomatic Repeater Config ration ....................................................................................................... 30
Man al Config ration of the Repeat Feat re ....................................................................................... 30
9. Deb g Related Commands ......................................................................... 34

Company Confidential 3 Raveon Technologies Corp.
10. M8T Diagnostic Provisions ....................................................................... 35
10.1. Overview of Diagnostics .............................................................................................................. 35
10.2. Reading the Diagnostic Information ............................................................................................. 35
10.3. Stat s and Statistics Command ................................................................................................... 35
11. T ne- p and Alignment ............................................................................ 36
11.1. Periodic Calibration ...................................................................................................................... 36
11.2. Calibration Commands ................................................................................................................ 36
11.3. Center Freq ency ........................................................................................................................ 37
11.4. TX Deviation ................................................................................................................................ 37
11.5. TX Mod lation Balance ................................................................................................................ 37
11.6. RX Carrier Detect ........................................................................................................................ 38
12. Tro bleshooting ........................................................................................ 40
Symptom: Unit will not receive ............................................................................................................ 40
Symptom: Unit will not transmit ........................................................................................................... 40
Symptom: Receive light blinks, b t 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
13. Mechanical ................................................................................................ 42

Company Confidential 4 Raveon Technologies Corp.
1. General Information about the RV-M
1.1. Congratulations!
Congrat lations on yo r p rchase of an M8T OEM radio modem – the most advanced
radio modem of its kind available today.
Please take a few min tes to read this man al caref lly. The information presented here
will allow yo to derive maxim m performance from yo r radio modem. After reading it,
keep the man al handy for q ick reference, in case q estions arise later on.
1.2. NOTICE
There are no ser-serviceable points inside this transceiver. All service work m st be
referred to yo r A thorized Service Center or Raveon Technologies Service Department.
1.3. Safety / Warning Information
Blasting Caps and Blasting Areas
To avoid possible interference with blasting operations, t rn off this radio or remove the DC
power when yo are near electrical blasting caps, in a blasting area, or in areas posted:
“Turn off t o- ay radio.” Obey all signs and instr ctions.
Potentially Explosive Atmospheres
T rn off yo r radio prior to entering any area with a potentially explosive atmosphere. Do
not install this prod ct for se in areas with potentially explosive atmospheres. Do not
remove, install, or charge batteries in s ch areas. Sparks in a potentially explosive
atmosphere can ca se an explosion or fire res lting in bodily inj ry or even death.
Note: The areas with potentially explosive atmospheres referred to above incl de f eling areas s ch as
below decks on boats, f el or chemical transfer or storage facilities, areas where the air contains chemicals or
particles, s ch as grain, d st or metal powders, and any other area where yo wo ld normally be advised to
t rn off yo r vehicle engine. Areas with potentially explosive atmospheres are often b t not always posted.
1.4. OEM Use
This radio mod le is for OEM se, and it is the responsibility of the OEM ser to notify the
end- sers of RF and electrical safety iss es.

Company Confidential 5 Raveon Technologies Corp.
2. Overview
The M8T RF Paging/Data radio modem is capable of high-speed narrow-band data
comm nications and POCSAG paging decoding. Its powerf l microprocessor enables it to
perform as both a data radio modem and a paging receiver. It contains a receiver, a
transmitter, and modem, creating an easy-to- se transparent data radio link. The M8T’s
ser interface is asynchrono s digital data into and o t of the M8T. Modem operation is
virt ally transparent to the ser and the config ration of the modem is via the ser serial
port.
The M8T can be config red in either a paging decoder mode or a data modem mode. The
command-line interface is similar to Raveon’s other data radio prod cts, and config ring
the mode is very easy. The M8T also has a digital inp t pin that may be sed to electrically
change modem types between data modem and paging modes.
The M8T is an easy to se and its re-programmability makes it extremely versatile. Most
parameters within the modem may be re-config red to optimize it for specialized
operations, extended range, or higher data thro ghp t.
It is also available in a receive-only version called the M8R. The M8R is the same electrical
design and has the same feat res as the M8T except the transmit circ its are not
pop lated.
2.1. Features
General Features
• Serial input and output. Programmable serial baud rates up to 57 00.
• Small sized and very rugged extruded enclosure.
• Lowest current draw in industry.
• Easy to use. Plug-in, Turn-on, and GO. Transmit data in = Receive data out.
• Receive-only version available
• Easily configured using “AT” commands
Data Radio Modem Features
• High-speed over the air data rates.
• Built-in radio transceiver with integrated modem
• Wide input voltage with high-efficiency switching voltage regulator.
• Capable of store-and-forward repeating operation.
• 1 bit addressing for up to 5,525 different unique device addresses per channel
• Supports group and broadcast transmissions. Network mask allows groups of any size.
• Up to 2 watts of RF output. Other RF power levels available upon request.
• Very fast Transmit-to-Receive turn around time.
• Serial input and output. Programmable serial baud rates up to 57 00.
• Programmable over-the-air data rates for long-range or high-speed
• Automatic key of transmitter on data.
• RF carrier-detect is not required receiving. No squelch setting required.

Company Confidential 6 Raveon Technologies Corp.
Paging Receiver Features
• 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 7 Raveon Technologies Corp.
3. Specifications
3.1. General
Model Number, transceiver: ............................................................. RV-M8T-xx
Model Number, receive only: ........................................................... RV-M8R-xx
Frequency Bands: ............................................................................... - C 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 ................................................................................. Simplex or Half-duplex
Full Spec Operating Temperature range ......................................... -30°C to +60°C
Extended Temp Range { extended temp specs} ............................. -40°C to +60°C
TX-RX and RX-TX turn-around time ............................................... <3mS
Wake-up time ..................................................................................... <700mS from OFF
On-board LEDs ................................................................................. Power , Status
RF I/O Connector ............................................................................... MMCX female
Digital signal levels ............................................................................ 3.3V logic
Enable Input Low............................................................................... 400mV
Digital Output High (1K load) ......................................................... 3.0 - 3.3V
Digital Output Low (1K load) .......................................................... 0 - 0.2V
Digital Input High ............................................................................. > 3.0V
Digital Input Low .............................................................................. < 0.3V
Enable input High .............................................................................. 1.40V
DC Input ............................................................................................ 8-13V volts DC
3.2. Transmitter Specifications (RV-M T-xx)
RF Power Output ............................................................................... 100mW – 2.0 W ( programmable)
Maximum Duty Cycle (500mW) ...................................................... 80% to 40C, 20% to 60C
Maximum Duty Cycle (2W, measured over 60 seconds) .............. 10% to 50C, 5% to 60C
Frequency Deviation ......................................................................... ± 2.2kHz
Channel spacing ................................................................................. 12.5kHz
RF Bandwidth ..................................................................................... 20MHz o-tu e
Occupied bandwidth ......................................................................... 11 kHz
TX Spurious outputs .......................................................................... < -70dBc
Occupied Bandwidth ......................................................................... Per FCC
FCC Emissions Designator ............................................................... 11K0F1D
Frequency Stability ............................................................................ Better tha ±1.5ppm
3.3. Receiver Specifications
Data RX sensitivity (.1% BER), 4800bps .......................................... < -114dBm
1200 & 2400baud ................................................................................ < -118dBm
POCSAG 512 sensitivity (<99% PER) .............................................. < -120dBm
RF No-tune bandwidth ..................................................................... 20MHz
Channel spacing ................................................................................. 12.5kHz
Adjacent Channel Selectivity 12.5kHz ............................................ -50dB
Alternate Channel Selectivity ........................................................... -65dB
Blocking and spurious rejection ....................................................... -75dB
RX intermodulation rejection ........................................................... -70dB

Company Confidential 8 Raveon Technologies Corp.
3.4. Interface Specifications
Connector Type .......................................... 20-pin 2mm header
DC Input ..................................................... 8-13V
DC power draw, RX mode ....................... < 600mW
DC power draw, TX mode, 2W ................ < 7W
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 9 Raveon Technologies Corp.
4. Electrical Inputs and Outputs
4.1. LEDs
Status LED (TX) This LED blinks red when the transmitter keys and is p tting o t RF
power. It blinks green pon the reception of data or RF carrier. It t rns orange when
decoding a paging message.
Power LED (PWR) This LED does a short blink, once every two seconds, indicating to the
ser that the power to the modem is ON and the modem is working. When the modem is in
the command mode, this LED will blink on and off, once per second.
4.2. I/O Pinout
The I/O connector is a 20-pin header, 2mm pin spacing.
Pin #
Function
I/O
Function
1 GND - Gro nd
2 Vcc I DC Inp t
3 Carr Det O CD O t. Low for carrier. Logic high for no carrier.
4 TX On O Pin is High when mod le is transmitting. Low when off, receiving, or
sleeping.
5 Data In (TXD) I Transmit data inp t.
6 Data O t (RXD) O Receive data o tp t.
7 Enable I Low (<.7V) to sh t down the mod le. High (>2.5V) to enable it.
8 Sleep i CPU Sleep inp t
9 CTS O Clear to send o tp t. Indicates state of internal b ffers.
10 RTS I RTS inp t for serial flow control.
11 RSSI 0 Receiver signal strength indicator
12 3.3V o t O 3.3V o t of the M8 mod le. 50mA max c rrent draw.
13 IOA I/O General p rpose I/O. 3V digital logic from CPU on M8
14 IOB I/O General p rpose I/O. 3V digital logic from CPU on M8. By defa lt
f nctions as DSR. 0= ready&r nning. 1=sleeping. If enable=0, this
line will =0.
15 Decode Mode I 3V digital logic with 10k p ll- p.
High/open = POCSAG paging receive mode,
Low/gro nd=data modem mode.
This feat re enabled by setting the alternate protocol with the ATMA
command.
16 STAT1 O O tp t to drive external d al-color LED. Anode
17 RX A dio O Receive and transmit a dio o tp t for factory test. Do not connect to
anything.
18 STAT2 O O tp t to drive external d al-color LED
19 GND I System Gro nd to M8
20 Vb Back p battery inp t to CPU to retain memory. Not req ired to be
connected to anything.

Company Confidential 10 Raveon Technologies Corp.
4.3. Heatsinking
The M8T operates at p to 10% transmit d ty cycle at ambient temperat res p to 50°C.
For d ty cycles p to 50%, the mod le req ires additional heat sinking.
If an external heat sink presses against the “GND PAD” are of the PCB, the RF power
transistor will r n cooler, and allow higher d ty cycles.
4.4. Mounting Holes
6 mo nting holes are provided on the mod le. For best RF performance, the M8T mod le
sho ld be mo nted to the system gro nd, sing metal stand-offs.

Company Confidential 11 Raveon Technologies Corp.
5. User Serial Port Commands
5.1. Overview
The serial portion the RF modem is sed to send and receive data over the
air, as well as to config re the RF modem. In normal operation, the ser
sends data into the TXD pin of the IO connector, and this data is transmitted
over the air. Received data from another RF modem is o tp t to the ser via
the RXD pin of the IO connector. This is the defa lt operating condition of the
RF modem. No special characters, hardware control lines, or timing is
req ired to operate the M8T modem.
There is also a “Command Mode” sed to program and config re the M8. In
the Command Mode, the M8T modem accepts commands via the serial port
TxD pin. The commands can be sed to change certain internal parameters
of the M8T modem as well as to read-o t the c rrent config ration and
diagnostic statistics.
5.2. Command Mode
The M8T modem may be p t into a “Command Mode”, by entering a
seq ence of three pl s characters (+++). To keep the M8T modem from
nintentionally entering the Command Mode beca se of the +++ pattern
occ rring in a stream of data entering the modem, there m st be a pa se in
the data stream before the +++ as well as a pa se after the +++ is sent. If
either pa se is missing, the modem will not enter the command mode.
Using serial comm nications software s ch as HypterTerminal, send the 3-
character command seq ence “+++” while observing times of silence before
[BT (Silence Before Seq ence) Command] and after [AT (Silence After
Seq ence) Command] the command characters. The defa lt BT and AT
times are 500mS.
The default sequence for entering into AT Command Mode:
The default sequence for entering into AT Command Mode: The default sequence for entering into AT Command Mode:
The default sequence for entering into AT Command Mode:
1. No characters sent for ½ a second.
2. Input three ( ) plus characters (“+++”) within ½ of a
second.
. No characters sent for ½ a second.
When the M8T modem first enters the Command Mode, it sends the phrase
Raveon M8T (transceiver version)
or
Raveon M8R (receive only version)
o t of its serial port, and then an “OK” seq ence. The “OK” seq ence is a
seq ence of 4 characters:
An “O”, “K”, <CR>, and <LF> characters
(<CR> = ASCII 0D, <LF> = ASCII 0A)

Company Confidential 12 Raveon Technologies Corp.
5.3. Setting a Parameter
To set a parameter in the M8T modem, enter the Command Mode as
described above. Then enter the proper AT command, a space, the
parameter, and then a carriage ret rn. For Example, to set the address of the
M8T modem to 1234, enter the following command:
ATDT 1234 <CR>
Once a Parameter is changed, the modem will begin sing the new
parameter and the new parameter is saved to non-volatile.
5.4. Reading a Parameter
To read the val e of a partic lar setting, iss e the command, with no
parameter. The modem will ret rn the val e followed by an “OK”. The
modem’s OK response is:
The val e in ASCII decimal format.
A <CR> <LF> (<CD> = ASCII 0D, <LF> = ASCII 0A).
An “O”, “K”, <CR>, and <LF> seq ence.
For example, if the ser enters the command to read the M8’s modem
address and its address was 1234, the ser wo ld iss e the following
command:
ATDT<cr>
and the modem will respond with:
1234 <CR> <LF> OK <CR> <LF>
To get on-line help with a command, enter the command and p t a q estion
mark in for the parameter. For example, to see what the ATDT command is
for, type:
ATDT ?
The modem will respond by listing a brief description of the command. To
see a list of all commands, type HELP.
5.5. CONFIG Button
If certain parameters within the modem are modified in a manor that ca ses
the modem to cease f nctioning or if the ser cannot enter the command
mode via the “+++” method described above, there is a small p sh b tton
internal to the M8T modem to assist in this case. This CONFIG b tton may
be pressed at any time, and forces the modem into a known operational state.
The CONFIG b tton is located inside the modem. Remove the rear cover,
exposing the two circ it boards. The b tton is in the front edge of the radio
mod le’s circ it board.
The defa lt settings that the modem will revert to when the CONFIG b tton is
pressed are:

Company Confidential 13 Raveon Technologies Corp.
1. Serial port 9 00 baud, 8 data bits 1 stop, no parity
2. ATCT setting set to 0000 ( 0 second time-out)
3. Serial port on the front of the unit in RS232 mode, 9 00bps, N/8/1.
Even tho gh the serial ba d rate reverts to 9600 ba d when the CONFIG
b tton is pressed and the IO port is RS232, it will revert back to the settings
programmed into the M8T modem once the Command Mode is exited.
5.6. Exiting the Command Mode
There are three ways to exit the command mode. They are:
1. ATCN Iss ing the ATCN. The M8T radio will exit the command mode,
and begin normal operation.
2. EXIT Iss ing the EXIT. The M8T radio will exit the command mode, and
begin normal operation.
3. Time Out. After a pre-set amo nt of time (60 seconds is the factory
defa lt time), the modem will a tomatically exit the Command Mode, and
contin e normal operation. Changes will not a tomatically be saved. This
time-o t d ration may be set with the ATCT command.

Company Confidential 14 Raveon Technologies Corp.
6. Command Mode Commands
6.1. General Command Common to Data Mode and Paging Mode
These commands apply to the general configuration of the M8T, and are
applicable in both the data modem mode and paging mode.
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 ba d rate (bps). Type the
range index (0-7) or the act al desired ba d rate.
Range: 0 – 7
0 = 1200 5= 38400
1 = 2400 6=57600
2 = 4800 7=115200
3 = 9600
4 = 19200
3
ATBT
Silence BEFORE Sequence – Sets period of silence before
the command sequence character in mS.
Range: 0-1000
mS 500
ATCD
Carrier Detect Threshold
–
Read set the carrier detect
threshold, in dBm. -113 means -113dBm. -113 -120 to -60
ATCH
Configure Hardware Flow Control
–
Enable (1) or disable (0)
flow control. When enabled, the modem will monitor the RTS
line, and if it is negated, stop sending data out the serial port. If
disabled, the modem will ignore the state of RTS, and always
send out charators.
1 = Enable
0 = Disable 0
ATCI
Handshaking In ert
–
Used to invert the R
TS handshaking
signal. 0=normal, 1 = inverted.
1 =
Invert
0 = Normal active low. 0
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 M8T is
pressed, this parameter will be automatically set to 60000.
Range: 100-60000mS 60000
ATE
Echo – Character echo set on (E1) or off (E0). This applies to
the Command Mode only. Range: 0 , 1 1 (echo)
ATF
Display frequencies
–
Display all of the frequencies
programmed into all of the channel memories. N A
ATFT
Transmit Frequency
–
Program the transmit frequency for this
channel. Enter in Hz or in MHz. The frequency will
automatically be saved in non-volatile memory (flash) for this
current channel number.
Range: See product data
sheet. For MURS products,
frequency cannot be
changed.
See product
data sheet.
ATFR
Recei e Frequency
–
Program the receive frequency for this
channel. Enter in Hz or MHz. The frequency will automatically
be saved in non-volatile memory (flash) for this current channel
number.
Range: See product data
sheet. For MURS products,
frequency cannot be
changed.
See product
data sheet.
ATFX
TX and RX Frequency
–
Program the re
ceive and transmit
frequency for this channel. Enter in Hz or MHz. Same as
issuing an ATFR and an ATFT command. The frequency will
automatically be saved in non-volatile memory (flash) for this
current channel number.
Range: See product data
sheet. N A
ATHN
Channel Number Select c rrent radio channel n mber. This
command does not store the channel n mber into EEPROM, Range: 1 - 6 1

Company Confidential 15 Raveon Technologies Corp.
ATHP
Channel Number – Select c rrent radio channel n mber. The
channel n mber is stored in EEPROM memory. Range: 1 - 6 1
ATIC
Read Current Dra Read the c rrent draw in mA. Acc racy is
within 20% of act al c rrent draw. Range: 0-9999 N/A
ATJF
Read/set the CTS threshold – Set the serial b ffer threshold
where the CTS line is negated. By defa lt the ATJF level is at
80% of the internal b ffer size.
1 - 2000 3800
ATL
Enable/Disable the LEDs – 1 = LEDs always off. This red ces
some power cons mption. 0 = LED operate normally. 0 or 1 0
ATMT
Protocol Select – The over-the-air comm nication protocol.
0=Packetized mode, 3=POCSAG paging receiver. Range: 0 or 3 0
ATMA
Alternate Protocol – If enabled, the alternate protocol is
selected with the Decode Mode inp t pin, 15. Range: -1, 0, or 3 3
ATNB
Parity – Selects parity format. Settings 0-4 transfer 8-bits over
antenna port and generate the parity bit on the RF receiving side.
Range: 0 – 5
0 = none
1 = Odd
2 = Even
3 = Mark (1)
4 = Space (0)
0
ATND
Number of Data Bits – Set/read the n mber of data bits. Range: 5 - 8 8
ATNS
Stop Bits – Selects the n mber of stop bits. Range: 1-2 1
ATR1
Select CD pin output signal – CD may be RF carrier detect, or
modem data detect.
Range : 0
-
4
4 = Data Framing
3= Always negate CD
2 = Always assert CD
1 = Data CD
0 = RF CD
0
ATR3
Serial Port Time Out
–
The t
ime 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 M8T will begin
to transmit the data over the air.
Range: 1 - 999
20
20mS is the
default.
ATR8
Frequency Off
set.
Used to set the radio on the center of the radio
channel.
Range: -500 to +500 0**
ATRQ
Recei er Signal Le el
–
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
AT
SL
Serial Number – Reads and ret rns a niq e serial n mber for
thjs nit.
Read Only
1 - 999999999
niq e
ATSH
Sho – Display the config ration of the modem. This will ret rn
a page of ASCII characters, showing the main config ration
parameters.
none None
ATSM
LPM Operation Enable
–
When set to 1, the DTR input line
controls the M8’s low-power operation. When set to 0, the M8T
will not go into LPM, regardless of the state of the DTR pin.
When set to 2, the modem is forced into a low-power mode,
disabling the receiver.
Range: 0, 1, 2 0
ATST
Statistics – Show the nit’s operational statistics. See Statistics
section of ser man al. 0, 1,2, 3, 4, or 5 None
ATTD
Transmit Test Data – When iss ed, the modem will begin
transmitting data. The type of data sent is set in the parameter.
0 = Go back to normal
1 = Random

Company Confidential 16 Raveon Technologies Corp.
Entering a <CR> will terminate the transmission. 3 = 1010 at ¼ ba d rate
4 = TX all 0s
5 = TX all 1s
6 = Test Points ON
7 = Transmit CW
8 = Transmit 1010101
ATTE
Read product temperature – Read the internal temperat re of
the nit’s circ it board in degrees Celsi s. -40 to +99 -
ATVB
Read DC input Voltage– Ret rns the DC inp t voltage reading,
in mV (12500 = 12.5VDC inp t). None none
ATVR
Firm are Version – Ret rns firmware version c rrently loaded
on the mod le.
Read Only, 3
characters none
ATV0
Numeric Response code– Config re the nit to send 0, 1 and 2,
response codes for OK, ERROR, and CONNECT. - -
ATV1
Verbose Response code
– Config re the nit to send OK,
ERROR, and CONNECT response codes. This is the defa lt
val e.
- Verbose
AT&F
Restore Factory
– Restore the factory defa lt val es. This
command will not erase the calibration val es. After this
command exec tes, the modem will still be in the CONFIG mode.
none
BAND
Read the Band
–
Reads the frequency band of the radio.
First parameter is the text version (UA, UC, VB, ), second
parameter is the lo er limit, and the third parameter is the
upper limit in MHz. Use to read the band that the radio is
tuned to cover.
None -
CONFIG
Display the M8’s configuration. 0, 1, or 2 -
CHNUM
Read number of channels. This command will ret rn the
n mber of channels this prod ct has. 6
MODEL
Read Model number. Read the model number of the unit. None M8T or M8R
SHOW
Sho /display an overvie of the radio’s configuration. None -
** indicates values that are calibrated in the factory and are unit-specific. If the Radio
Type” is changed, these will need to be re-calibrated.
6.2. Data Modem Mode Related Commands
These commands apply to the operation of the M8T when it is in the data
modem communication mode.
Command
Command Description Parameters Factory
Default
ATBC
Busy Channel Lock Out
–
Enable disable the BCL. If enabled,
the modem will not transmit on a radio channel that is busy (has
RF on if). 0-OFF, 1=ON.
Range: 0-1 0
ATDT
Destination Address to call– Sets address of the modem to
send data to. Note, this parameter is entered in HEX format.
Each digit may be a 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,or an F.
Range: 0-FFFF 1234
ATGP
Group Number
– Set/read the gro p n mber for this nit.
0 means ignore the gro p n mber. 1-255 is a gro p identifier.
Only M8s with the same Gro p N mber will comm nicate
together.
0-255
0 (ignore
gro p
n mbers)
ATHS
Sho History – Show a table of listing the most recent
receptions, and the IDs that the data was sent from No parameter
ATHX
Enable/Disable single
-
hop repeating
–
0=any n mber of
repeats, 1 – nit will not repeat a packet that was already
repeated.
0 or 1 0 (multi-hop
OK)

Company Confidential 17 Raveon Technologies Corp.
ATLA
Listen Address
– Config res the listen address for this nit. The
nit will receive data if this listen address matches the destination
address in a data transmission. FFFF to disable it.
Range: 0000 - FFFF 1234
ATMK
Address Mask
– Config res 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
– Config res the individ al; address for this nit.
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 gro p. See addressing section.
Range: 0000 - FFFF 1234
ATPE
Packet Error Display – Shows statistics to comp te packet-
error rate. Displays Packets Per Min te (PPM) and a r nning
total.
None (display PER)
1 = reset co nters
2 = Stop PER display
None
ATPO
RF Power Output
. Set or show the RF power o tp t setting.
Val e is in percent, from 0% to 100%. Use and RF wattmeter to
confirm the power setting, and adj st the % accordingly to obtain
the desired RF power level.
0-100 100
ATR0
Symbol Peak De iation
– Set the peak FM deviation of the
transmit symbols. Note: This can be a negative n mber to invert
the mod lation.
Range: -1000 – 1000 120**
ATR2
O er-The-Air bit rate - This is the data rate the radio uses to
send data over the air. All RF modems in the network must
use the same o er-the-air baud rate. Refer to section Error!
Reference source not found. for information on how to set the
OTA baud rate.
Range:
0 = 800 5 = 9600 2L
1 = 1200 6 = 19200 4L
2 = 2400 7 = 5142 2L
3 = 4800 8 = 9600 4L
4 = 8000 4L 9 = 2000 2L
3 narrow
ATR5
Preamble length – The number of bytes to send over-the-air in
the pre-amble. Range: 3 - 255
5
**
(Varies based on
data rate and
radio type. 7
typical)
ATRB
Number of retries
. If this modem does not get an ACK back
when it sends data, this is the number of times it will re-transmit
the packet and wait for an ACK. 0=disabled feature.
Range: 0-99
0
(ACKs are not
used)
ATRF
RF Carrier Required
–
When enabled, there must be RF
energy on the channel for the modem to output data.
Streaming data mode only. 1-RF required. 0=ignore RF energy
when receiving.
Range: 0, 1 0 (no RF
required)
ATRV
Disab
le Remote Access
–
When enabled (set to a 0), the
modem will respond to over-the-air RPR requests, Pings, and
over-the-air commands. Default is OFF (1).
0 = Remote Access on
1 = Remote Access off 1
ATTT
Max Packet Size – Set the maxim m n mber of bytes in an
over-the-air packet. 1 - 512 80
ATXn
Sho or Configure the Repeat Table – Set the addresses that
this nit will store-and-forward data to/from. n = 1, 2, 3, or 4
designating the entry in the table to show or edit..
Four parameters
aaaa bbbb cccc dddd where
aaaa=So rce Address
bbbb = S.A. Mask
cccc = Destination Address
dddd = D.A. Mask
ATXR
Enable/Disable Store and For ard Repeating – 0=disabled, 1
– enabled. 0 or 1 0 (Off)
ATXT
Read/set repeater delay
–
Read or set the repeater delay. This
is the time between receiving a data packet, and the time the
repeater will re-send it.
PING
Ping another modem.
Format is PING xxxx, here xxxx is
the ID of the modem to ping. If remote access is enabled on
xxxx, it ill respond.
XXXX -
REPEAT
Turn Repeater feature on/off. If 1, a quick ay to enable
repeating all packets. I f 0, disables the repeat feature. 0 (off) or 1 (on) 0
RPR
Remote Procedure Request.
Used to req est exec tion of a
command on a remote mode (over the air). See M8T System
Protocol man al for information on sing this feat re.

Company Confidential 1 Raveon Technologies Corp.
** indicates values that are calibrated in the factory and are unit-specific.
6.3. Paging Receiver Related Commands
The following commands are specific to the operation of the M8T in the paging
decoder mode. The ATMT and ATMA commands config re the M8T to operate
in the paging decoder mode.
DF
Data Format. 0=N meric, 1= Alpha-n meric, 2=tone,
3=voice, 4=a to detect based on f nction bits. 0, 1, 2, 3, or 4 4
CC x
Set/Read Cap Code.
Two parameters, CC x yyyy
x= 1,2 or 3 which is the cap code n mber.
yyyy is the pager code 1 – 2097152. -1 to disable the
partic lar cap code. Enter “CC” to see a list of all pager cap
codes.
CC 1 12345
CC 2 -1
CC 3 -1
PM
Promiscuous Mode. Enable/disable promisc o s mode.
0 = off, 1 = ON (receive all paging messages). 0 or 1 0
PR
Pager Data Rate. Parameter is 512, 1200, or 2400 512, 1200, 2400 512
6.4. Factory Default Settings
RV-M T-xx (Transceiver)
For the UHF M8T, model RV-M8T-UC, the main factory defa lts are:
General Settings
Primary Protocol: (ATMT 0) ............................... Packet Data
Alternate Protocol: (ATMA 3) ............................ POCSAG
WMX (WMX 0) .................................................. OFF
Paging Settings
Over-the-air paging ba d rate: .......................... 512 ba d
Alternate protocol (pin 15 = 1) ........................... POCSAG 512
Paging data format (DF) .................................... A to detect
Paging Cap Code 1 (CC 1 279001) .................. 279001
Data Modem Settings:
Over-the-air data modem ba d rate: ................. 4800 ba d, 2-level
Serial port .......................................................... 9600ba d, N/8/1
Hardware flow control ....................................... Off
RF Power O tp t .............................................. 100% (2watts)
Channel n mber selected ................................. 1
ID (ATMY) ......................................................... 1234
Address Mask (ATMK) ...................................... FFFF
Freq encies
Ch 1 .................. 462.2125 MHz

Company Confidential 19 Raveon Technologies Corp.
RV-M R-xx (Receiver)
For the UHF M8R receiver, model RV-M8R-xx, the main factory defa lts are:
General Settings
Primary Protocol: (ATMT 0) ............................... Packet Data
Alternate Protocol: (ATMA 3) ............................ POCSAG
Channel n mber selected ................................. 1
WMX (WMX 0) .................................................. OFF
Paging Settings
Over-the-air paging ba d rate: .......................... 512 ba d
Alternate protocol (pin 15 = 1) ........................... POCSAG 512
Paging data format (DF) .................................... A to detect
Paging Cap Code 1 (CC 1 279001) .................. 279001
Data Modem Settings:
Over-the-air data modem ba d rate: ................. 4800 ba d, 2-level
Serial port .......................................................... 9600ba d, N/8/1
Hardware flow control ....................................... Off
ID (ATMY) ......................................................... 1234
Address Mask (ATMK) ...................................... FFFF
Freq encies
Ch 1 .................. 462.2125 MHz

Company Confidential 20 Raveon Technologies Corp.
7. Using the M T in Paging Mode
This section describes the operation of the M8T when it is in the paging receive
mode.
There are two ways to config re the M8T to operate as a paging receiver. The
M8T may be config red to se j st one protocol 100% of the time as defined by
the ATMT command. Or, the M8T may be config red with a second “Alternate
Protocol”, that may be selected sing the inp t pin 15.
1. Configured by Command. With ATMA set to -1 to disable the
alternate protocol, the ATMT command will select the current operating
mode, either data modem or paging. ATMT 0 selects data modem
mode, and ATMT 3 selects POCSAG paging receiver command. With
ATMA set to -1, the ATMT command will always determine the
protocol the M8T is using.
2. Hardware Select: Issue the ATMA 3 command to set the Alternate
Protocol to paging decode. When ATMA is set to any number other
than -1, the M8T will use input pin number 15 to select between two
possible protocols. Protocol numbers are: 0=data radio, 3= POCSAG
decode. Pull input pin 15 high, enabling the alternate protocol.
The factory default configuration is ATMA 3 and ATMT 0.
7.1. Setting Cap Codes
Cap Codes are the “ID” of the paging receiver. When a paging message is
receive dover-the-air with a cap code that matches any one of the M8T’s
configured cap code registers, the M8T will receive the paging message. The
M8T has multiple cap code registers. To configure a cap code register, use the
CC x command, where x is the cap code register number. Setting a cap code to
-1 or 0 disables the particular cap code.
For example, to configure the M8T to receive pages sent to cap code 12345,
issue the following command:
CC 1 12345
By factory default, the cap code is set to 12345, and all other cap code registers
are disabled. If you issue the AT&F command, the cap codes will be reset to
factory defaults.
For test purposes, the promiscuous receive mode may be enabled using the PM
x command. 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