Specifications

Configuration MP.11 5054 (MP.11a) Installation and Management
Interface Parameters
81
• Channel Bandwidth: This is a read only field. Channel Bandwidth is set at 20 MHz.
• 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:
• Registration Timeout: This is the registration process time-out of an SU on a BSU. Default is 5 seconds.
• Rx Activity Timeout: This is the activity time-out of an SU on a BSU. Default is 0 seconds.
• Network Secret: A network secret is a secret password given to all nodes of a network. An SU can only register to a
BSU if it has the same Network Secret. The Network Secret is sent encrypted and can be used as a security option.
• Input / Output Bandwidth Limit: These parameters limit the data traffic received on the wireless interface and
transmitted to the wireless interface, respectively. Selections are in steps of 64 Kbps from 64 Kbps to 108,064 Kbps.
Multicast Rates in Mbps Multicast Rates in Mbps with
Turbo Mode Enabled (Non-DFS US Only)
612
918
12 24
18 36
24 48
36 72
48 96
54 108
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