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Key TX
Continuously
Clear-to-Send Time
Clear-to-Send Hold
Time
MDS 05-4670A01, Rev. E
If data buffering is
ON
are sent over the air as quickly as possible, but the receiver buffers
(stores) the data until enough bytes have arrived to cover worst-case
gaps in transmission. This mode of operation is required for protocols
such as MODBUS™ that do not allow gaps in their data transmission.
NOTE: Seamless mode (
where the transmitter's baud rate is greater than or equal to the
receiver's baud rate. Enforcement of this rule is the user's
responsibility.
CKEY [ON–OFF]
The
command enables or disables the continuously-keyed func-
CKEY
tion of the radio. When
and the Timeout Timer is disabled.
CTS [0–255]
The
(clear-to-send) command selects or displays the timer value
CTS
associated with the CTS line response. The command parameter ranges
from 0 to 255 milliseconds.
For DCE operation, the timer specifies how long to wait after the RTS
line goes high, before the radio asserts CTS and the DTE can transmit
the data. A CTS value of zero keys the radio and asserts the CTS line
immediately after the RTS line goes high.
For CTS Key operation (see
long to wait after asserting the CTS, before sending data from the
port. A timer value of zero means that data will be sent from
INTERFACE
the data port without imposing a key-up delay. (Other delays might be
present based on selected radio operating parameters.)
CTSHOLD [0–60000]
Used in
DEVICE CTS KEY
milliseconds that CTS remains present after transmission of the last
character from the RXD pin of the
used to prevent squelch tail data corruption when communicating with
other radios.
The
setting can range from 0 to 60000 ms (60 seconds). The
CTSHOLD
default value is 0, which means that CTS will drop immediately after the
last character is transmitted. If the command is entered when the radio
is in
mode, the response
DEVICE DCE
SD Series Reference Manual (x710 Mode)
, the radio operates in seamless mode. Data bytes
) is intended only for applications
BUFF ON
is set to
, the radio is continuously keyed
CKEY
ON
command), the timer specifies how
DEVICE
mode, this command sets the amount of time in
port. This "hold time" can be
DATA
CTSHOLD N/A
DATA
is shown.
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