28
SD Series Reference Manual (x710 Mode)
MDS 05-4670A01, Rev. E
DATAKEY [ON, OFF]
Key on Data Activity
The
DATAKEY
command enables or disables the ability of the radio to key
the transmitter as data is received at the
DATA INTERFACE
connector.
Asserting RTS keys the radio regardless of this command setting.
If
DATAKEY
is set to
ON
, the radio will key when a full data-character is
received at the transceiver’s
DATA INTERFACE
connector. If
DATAKEY
is
set to
OFF
, the radio needs to be keyed by asserting RTS.
DEV
Modem Deviation
Displays modem control deviation in Hertz (Hz). This is a read-only
command, and cannot be changed in the field.
DEVICE [DCE, CTS KEY]
Data Device Mode
The
DEVICE
command controls or displays the device behavior of the
radio. The command parameter is either
DCE
or
CTS KEY
.
In
DCE
mode (the default setting), CTS will go high following RTS, sub-
ject to the CTS programmable delay time. If the
DATAKEY
command is
set to
ON
, keying can be stimulated by the input of characters at the data
port. Hardware flow control is implemented by signaling the CTS line if
data arrives faster than it can be buffered and transmitted.
In
CTS KEY
mode, the SD is assumed to be controlling another radio. The
SD will still key based on the RTS line, but the CTS line is used as a key-
line control for the other radio. CTS is asserted immediately following
the receipt of RF data, but data will not be sent out the
DATA INTERFACE
port until after the CTS programmable delay time has expired. (This
gives the other radio time to key.)
DKEY
Unkey Transmitter
This command deactivates the transmitter after it has been keyed with
the
KEY
command.
DLINK [ON/OFF/xxxx]
Diagnostic Link
Use this command to configure the local diagnostic link protocol used
in network-wide diagnostics.
Entering
DLINK ON
enables the diagnostic link. Entering
DLINK OFF
dis-
ables the diagnostic link.
To change the diagnostic link, enter
DLINK
followed by one of the fol-
lowing baud rates: 1200, 2400, 4800, 9600, 19200 (default), 38400,
57600, 115200.
Summary of Contents for DS-SD4-1
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