Users Manual

MDS 05-6399A01, Rev. G MDS™ Master Station 79
x Members – The ln-nic interfaces that are used for this configuration
x Device Mode - Sets the role the radio will assume in the network.
- Remote (DEFAULT)
- AP
x Network Name - The name of the network. Used to control what networks the radio connects
to. Valid values: 1 to 31 letters (DEFAULT is mds_ln). The network name string is used to
identify the logical network that the device should join. If the network name does not match,
the device will log an event to identify network name collisions.
x Data Compression – Over the air compression
- lzo - Compresses the over the air traffic with the LZO algorithm (DEFAULT)
- none - No data compression
x Header Compression – Enabled by DEFAULT. Enable/disable over the air robust header
compression. This feature compresses IP headers to improve system performance, and is most
useful in applications that rely on IP packets with small payloads, such as terminal server oper-
ations or MODBUS polling. This setting must match on each radio (Remote and AP).
x Power - The transmit power of the radio: Valid values: 20 - 40 dBm – DEFAULT is 40dBm
x TX Frequency – The frequency at which the radio transmits.
x RX Frequency – The frequency at which the radio receives.
x Channel - Controls the channel bandwidth and symbol rate of the radio.
- 6.25 kHz-4.8 ksps - Channel width 6.25 kHz, symbol rate of 4.8 ksps
- 12.5 kHz-9.6 ksps - Channel width 12.5 kHz, symbol rate of 9.6 kbps (DE-
FAULT)
- 12.5 kHz-10 ksps - Channel width 12.5 kHz, symbol rate of 10 kbps
- 25 kHz-16 ksps - Channel width 25 kHz, symbol rate of 16 kbps
- 25 kHz-20 ksps - Channel width 25 kHz, symbol rate of 20 kbps
NOTE
Some channel configurations may not be available for use because of country restrictions.
x Modulation – Sets the radio’s modulation. You may select automatic (adaptive modulation),
or choose from three fixed modulations.
- Adaptive modulation (DEFAULT)
- QPSK
- 16QAM
- 64QAM
Automatic modulation adaptively selects which modem (QPSK, 16QAM, or 64QAM)
is used on a per-transmission basis. This is useful in networks with some remotes close
to the Access Point, and others farther away or obstructed. This mode allows the close
remotes to take advantage of the higher data rate for the directed messages, while the
remotes use a more conservative modulation.
Radios with fixed modulation settings will operate only at the modulation that you
specify. If the specified modulation is higher than the connection can support, no traf-
fic will flow. If the connection can support a higher modulation than the selected mod-
ulation, the radio will not take advantage of this and will continue to use the fixed
modulation. We recommend that Adaptive Modulation be used in all cases other
than bench tests.
Theoretical throughput is based on modulation and channel settings. Please refer to
Table 5-5 above.