GE MDS ORBIT ECR User Manual

128 MDS Orbit MCR/ECR Technical Manual MDS 05-6632A01, Rev. F
 TX Frequency – The frequency at which the radio transmits. Valid values: none, 407-470
MHz. DEFAULT is none.
 RX Frequency – The frequency at which the radio receives. Valid values: none, 407-470
MHz. DEFAULT is none.
NOTE LN radios are shipped from the factory without set frequencies. The LN radio module will not
power on until you enter specify a valid TX and RX frequency.
 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 (DEFAULT)
- 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. See
Table 3-16 for details.
 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 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 traffic will flow. If the
connection can support a higher modulation than the selected modulation, 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 3-15
above.
 FEC -- Forward Error Correction is useful in controlling errors in weak connections. FEC
encodes data in a redundant fashion to allow data correction in a noisy or weak connection
without the additional overhead of retransmission.
- Disabled (DEFAULT). No Forward Error Correction will be used. This option provides
the highest throughput and standard sensitivity, and is suitable for strong connections.
- Low Gain – Provides better sensitivity, while still offering good throughput.
- Adaptive – Provides the best sensitivity and standard throughput. Adaptive on a per-
packet basis.
NOTE It is critical to have FEC set identically on the AP and all Remotes.

GE MDS ORBIT ECR Specifications

General

Brand	GE
Model	MDS ORBIT ECR
Category	Network Router
Language	English