74 MDS 4790/9790 Series I/O Guide MDS 05-3438A01, Rev. F
Note that key-on-data mode only applies when the input data source is digital.
When the input data source is analog, this setting is irrelevant.
Data Buffering Use this screen to enable or disable data buffering. If you enable data buffering, the
radio operates in seamless mode, where the data is sent over the air as quickly as
possible. However, the receiver will buffer (hold) 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.
If data buffering is disabled, the radio operates with the lowest possible data
latency (average). Data bytes are sent from the data port as soon as an incoming
RF data frame is disassembled. Average and typical latency time will both be
reduced, but idle character gaps may be introduced into the outgoing data flow.
To enable or disable data buffering, press ENTER, then use the up/down arrow
buttons to display ENABLE or DISABLE. Press ENTER again to make the change.
DLINK Baudrate Use this screen to set or show the diagnostic baud rate. Allowable selections are:
2400, 4800, 9600 and 19200 bps.
To change the setting, press ENTER, then use the up/down arrow buttons to show
the desired setting. Press ENTER again to make the change.
Note: This screen is associated with Network-wide Diagnostics. For more
information, refer to the
Network-wide Diagnostics manual (P/N
05-3467A01) available from GE MDS.
Diagnostic Type Use this screen to set or show the radio’s function in a network-wide diagnostics
system. The allowable settings for the radio are Node, Root, Gate, and Peer.
Note: This screen is associated with Network-wide Diagnostics. For more
information, refer to the
Network-wide Diagnostics manual (P/N
05-3467A01) available from GE MDS.
Transmit Level
[–20 to +3, AUTO]
Use this screen to set or display the radio’s audio transmit level when the radio is
operating as an analog device with data passing through the 4-WIRE AUDIO
INTERFACE. Set the audio transmit level from –20 to +3 dBm, or set it to adjust
automatically.
To change the audio transmit level, press ENTER. You do not need to use the
left/right arrow buttons to select a digit. Instead:
To increase the transmit level, press the up or left arrow button ( ).
To decrease the transmit level, press the down or right arrow button ( ).
Press ENTER again to make the change.
DATAKEY [ON/OFF]
command, Page 44
Data Buffering
enabled
BUFF [ON/OFF] command,
Page 42
DLINK Baudrate
4800
DLINK [ON/OFF/xxxx]
command, Page 45
Diagnostic Type
Node
DTYPE
[NODE/ROOT/GATE/PEER]
Transmit Level
-1 dBm
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