Technical Manual

Company Confidential 13 Raveon Technologies Corp.
DTR signal line is more than 2V, the modem is in active run state. When
DZTR is less than 0.6V, the unit will go into a deep sleep mode.
5. User Serial Port Commands
5.1. Overview
The serial portion the RF modem is used to send and receive data over the
air, as well as to configure the RF modem. In normal operation, the user
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 output to the user via
the RXD pin of the IO connector. This is the default operating condition of the
RF modem. No special characters, hardware control lines, or timing is
required to operate the MS modem.
There is also a “Command Mode” used to program and configure the M6. In
the Command Mode, the MS modem accepts commands via the serial port
TxD pin. The commands can be used to change certain internal parameters
of the M6 modem as well as to read-out the current configuration and
diagnostic statistics.
5.2. Command Mode
The M6 modem may be put into a “Command Mode”, by entering a sequence
of three plus characters (+++). To keep the M6 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 sequence “+++” while observing times of silence before
[BT (Silence Before Sequence) Command] and after [AT (Silence After
Sequence) Command] the command characters. The default BT and AT
times are 500mS.
The default sequence for entering into AT Command Mode:
1. No characters sent for ½ a second.
2. Input three (3) plus characters (“+++”) within ½ of a
second.
3. No characters sent for ½ a second.
When the M6 modem first enters the Command Mode, it sends the phrase
“Raveon” followed by the model number
Raveon M6S (transceiver 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)