GE MDS Master Station Technical Manual page 66

Simplex Mode – This controls whether or not the Master Station will be running in
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simplex (switched carrier) or full duplex mode. When simplex is enabled, TX and RX are
switched onto a single RF interface. A Master Station without an internal duplexer with
with a single antenna output must have simplex mode enabled.
Dlink Mode (B Modems) – Legacy products that only support B-Modems do not have
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support for Dlink. Newer products such as the MDS SD have the ability to support Dlink
even when using B-Modems. Depending on site-specific requirements, this value may
need to be changed to 'bypassed' in order to work with legacy products. It is
recommended to leave this value set to 'auto' unless there is an explicit need to change it.
Rx Mute – The number of milliseconds to mute the receiver after transmitting data.
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Receive muting might be required when you configure the radio as a full-duplex polling
remote communicating through a repeater. It prevents the radio from hearing its own
transmissions ('echoes') from the repeater, which might cause software application errors.
Rx Timeout Enable – When enabled, the radio will alarm if nothing has been received
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over-the-air in 'Rx Timeout Delay' minutes. This can used to detect if the receiver has
failed, or if there has been a failure with the antenna.
Rx Timeout Delay – When 'Rx Timeout' is enabled, this is the number of minutes to wait
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for a received signal before raising an alarm.
Legacy Packet Compatibility – When the radio-mode is configured for packet-with-mac,
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enabling this option will cause the radio to operate in a legacy packet mode. This is not
full packet mode as found on SD radios, as there is no support for listen-before-talk.
Modem Receive Tolerance – Changes the receive tolerance of the modem. This value
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should always be set to normal unless instructed to change it by GE MDS technical
support for specific applications.
Modem Transmit Tolerance – Changes the transmit tolerance of the modem. This value
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should always be set to normal unless instructed to change it by GE MDS technical
support for specific applications.
Data Device Mode (x710 mode only) – This value controls the device behavior of the
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radio when operating in x710 mode. In DCE mode, CTS will go high following RTS,
subject to the CTS programmable delay time. CTS KEY mode, the unit is asumed to be
controlling another radio. The radio will still key based onthe RTS line, but the CTS line
is used as a key-line control for an external radio. CTS is asserted following the receipt of
RF data, but not until after the CTS programmable time has expired. (This gives the other
radio time to key.)
CTS Hold Time (x710 mode only) – Used in CTS KEY mode, this command sets the
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amount of time in milliseconds that CTS remains present after transmission of the last
character out the RXD pin of the DATA port. This 'hold time' can be used to prevent
squelch tail data corruption when communicating with other radios.
RSSI out Enabled – When enabled, the current RSSI value will be available as a DC
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voltage level on the RSSI out pin of the alarm/relay module. NOTE: This feature requires
SD NICs that are capable of generating an output voltage based on RSSI. If you attempt to
enable this feature on hardware that does not support it, you will receive an error message
preventing you from committing the changes.
62 MDS™ Master Station MDS 05-6399A01, Rev. E