Specifications

Configuration MP.11 5054 (MP.11a) Installation and Management

Interface Parameters

NOTE: If you select 48 or 54 Mbps (96 or 108 in Turbo mode) DDRS is automatically turned on.

• Channel Bandwidth: This is a read only field. Channel Bandwidth is set at 20 MHz.

• Antenna Gain You can modify the sensitivity of the radio card when detecting radar signals in accordance with ETSI,

FCC, and IC Dynamic Frequency Selection (DFS) requirements. Given the radar detection threshold is fixed by ETSI,

the FCC, and IC and that a variety of antennas with different gains may be attached to the unit, you must adjust this

threshold to account for higher than expected antenna gains and avoid false radar detection events. This can result in

the units constantly changing frequency channels.

You can configure the threshold for radar detection at the radio card to compensate for increased external antenna

gains.

The Antenna Gain value ranges from 0 to 35. The default value is 0.

• Satellite Density: The Satellite Density setting is a valuable feature for achieving maximum bandwidth in a wireless

network. It influences the receive sensitivity of the radio interface and improves operation in environments with a high

noise level. Reducing the sensitivity of the unit enables unwanted “noise” to be filtered out (it disappears under the

threshold).

You can configure the Satellite Density to be Large, Medium, Small, Mini, or Micro. The default value for this

setting is Large. The smaller settings are appropriate for high noise environments; a setting of Large would be for a

low noise environment.

A long distance link may have difficulty maintaining a connection with a small density setting because the wanted

signal can disappear under the threshold. Consider both noise level and distance between the peers in a link when

configuring this setting. The threshold should be chosen higher than the noise level, but sufficiently below the signal

level. A safe value is 10 dB below the present signal strength.

If the Signal-to-Noise Ratio (SNR) is not sufficient, you may need to set a lower data rate or use antennas with higher

gain to increase the margin between wanted and unwanted signals. In a point-to-multipoint configuration, the BSU

should have a density setting suitable for all of its registered SUs, especially the ones with the lowest signal levels

(longest links).

Take care when configuring a remote interface; check the available signal level first, using Remote Link Test.

WARNING: When the remote interface accidentally is set at too small a value and communication is lost, it

cannot be reconfigured remotely and a local action is required to bring the communication back.

Therefore, the best place to experiment with the level is at the unit that can be managed without

going through the link; if the link is lost, the setting can be adjusted to the correct level to bring

the link back.

Sensitivity threshold settings related to the density settings for the unit are:

• Maximum Satellites: You can specify a maximum value of 250 in this field, because up to 250 SUs can be connected

to a BSU. If a BSU already has as many SUs as specified in this field, a new SU cannot connect to the BSU.

54 (see note) 108 (see note)

Satellite Density Receive Sensitivity Threshold Defer Threshold

Large -95 dBm -62 dBm

Medium -86 dBm -62 dBm

Small -78 dBm -52 dBm

Mini -70 dBm -42 dBm

Micro -62 dBm -36 dBm

Multicast Rates in Mbps

Multicast Rates in Mbps with

Turbo Mode Enabled (Non-DFS US Only)