TS4000 Radio Modem User’s Manual
Radio Setup
24
Selection Description
Enable
Redundancy
This configures the TS4000s for use with the Redundancy
switch.
Redundant
Modem A
The TS4000 that is connected to the A side of the
redundancy switch must have this option checked.
Redundant
Modem B
The TS4000 that is connected to the B side of the
redundancy switch must have this option checked.
For redundant modems used in packet mode, the modems will consume
two individual packet addresses.
The first address is the value configured on
the Packet for Port tab under Modem Address – Individual. The second is an
individual address 1 number higher. This is done automatically by the TS4000s
and the Individual Address must be configured the same for both redundant
modems.
It is essential that the second address is not used by any other
modem in the network.
For additional information please reference the Redundancy Switch User’s
Manual.
Selection Description
Disabled
This minimizes the amount of overhead required to send
data.
Enabled
Transmit data is block coded (12,8 Hamming) and interleaved
(16 bits). This provides forward error correction (FEC) for
strings of errors up to 16 bits long. Coding requires an extra
50 % overhead on top of formatted data. This type of coding
is ideal for combating errors induced from multi-path fading
common in mobile environments.
Coding (FEC)
The scramble code determines the pseudo-random sequence used to scramble
the transmitted data. This provides data privacy and also randomizes the data
for optimum signal detection. All TS4000s operating in the same network must
use the same scrambling code.
Data Scramble Code
Selection Description
Disabled
The modem will not transmit while receiving. Transmit data is
buffered and then transmitted when the TS4000 stops
receiving.
Enabled
Transparent Mode: The TS4000 transmits as soon as data is
ready without regard to the receive state.
Packet Mode: The TS4000 will transmit over foreign (non
TS4000) receptions. During a receive, if the TS4000
cannot synchronize then it declares it to be foreign
reception and allows transmission over it.
Force Transmit Over
Receive
When enabled, the timeout timer stops the TS4000 from transmitting after the
specified period of continuous transmission. This is used to avoid locking up the
radio channel due to a continuous transmission caused by a fault in the TS4000
or the host equipment.
Transmit Timeout Timer
When enabled, the TS4000 does not receive and will transmit regardless of
activity on the channel.
Transmit Only Operation