Version C16. February 2013
Raveon Technologies Corporation
Company Confidential
17
5. Configuring the RV-M7 GX
5.1.
Overview
The RS-232 serial port on the unit is used to send and receive data over the air, as
well as to configure the RF modem. In normal 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
RV-M7
modem.
If the
RV-M7 GX
is used as a GPS transponder (
GPS 1
mode), the serial port need
not be connected to anything. The internal GPS will initiate the transmissions of
position and status.
There is also a “Command Mode” used to program and configure the
RV-M7 GX
.
In the Command Mode, the
RV-M7 GX
modem accepts commands via the serial
port TxD pin. The commands can be used to change certain internal parameters of
the
RV-M7 GX
modem as well as to read-out the current configuration and
diagnostic statistics.
5.2.
Command Mode
The
RV-M7 GX
modem may be put into a “Command Mode”, by entering a
sequence of three plus characters (+++). To keep the
RV-M7
modem from
unintentionally entering the Command Mode because of the +++ pattern occurring
in a stream of data entering the modem, there must be a pause in the data stream
before the +++ as well as a pause after the +++ is sent. If either pause is missing,
the modem will not enter the command mode.
Using serial communications software such as
HypterTerminal
, send the 3-
character command seq
uence “+++”.
When the
RV-M7 GX
modem first enters the Command Mode, it sends the phrase
“
RV-M7
” out it serial port, and then an “OK” sequence. The “OK” sequence is a
sequence of 4 characters:
“
O
”, “
K
”, <
CR
>, and <
LF
> characters
(<CR> = ASCII 0D, <LF> = ASCII 0A)
5.3.
Password Protection
One M7 series products with firmware version C0 or higher, the user interface may
be password protected. If it is password protected, the radio will output a
“password:” prompt when entering the command mode.
When in the command mode, to enable the use of a password enter:
Password xxxx <CR>
