20
OEM Series™ I/O Guide
MDS 05-3624A01, Rev. B
For DCE operation (see
DEVICE
command), this command has no effect.
The response
CTSHOLD n/a
is displayed.
DEVICE [DCE | CTS KEY]
The
DEVICE
command sets or displays the device behavior of the radio.
The command parameter is either
DCE
or
CTS KEY
.
The default selection is
DCE
. In this mode, CTS goes high following
RTS, subject to the CTS programmable delay time. Hardware flow
control is implemented by signaling the CTS line if data arrives faster
than it can be buffered and transmitted. The transceiver does not require
an RTS/CTS handshake. Data is transmitted whenever there is data to
send.
If
CTS KEY
is selected, the CTS line transforms to a Receive Data
indicator (with programmable delays) in order to provide a control line
for use by other devices. The RTS line is ignored. CTS is asserted
immediately following the receipt of RF data, but data is not sent out the
DATA INTERFACE
port until the CTS programmable delay time has
expired. (See
CTSHOLD
description for the delay available following the
data.)
A typical use of
CTSKEY
is to provide a keyline (or RTS signal) for a
half-duplex modem or other radio.
DKEY
This command deactivates the transmitter after it has been keyed with
the
KEY
command.
NOTE:
The
DKEY
and
KEY
commands are not intended for normal
operation. They are tools for field testing and installation.
INIT
The
INIT
command is used to re-initialize the radio’s operating
parameters to the factory defaults. This may be helpful when trying to
resolve configuration problems that may have resulted from the entry of
one or more improper command settings. Entry of this command allows
you to get back to a known working state. The following changes to the
radio are made when
INIT
is entered:
•
AMASK
is set to
FFFF FFFF
•
BAUD
is set to 9600 baud, 8 data bits, no parity, and 1 stop bit
(
9600 8N1
)
•
CTS
is set to
0
•
CTSHOLD
is set to
0
•
DEVICE
is set to
DCE
