User's Manual

Tsunami MP.11 2454-R, 5054-R, and 5054-R-LR Installation and Management

Chapter 5. Using the Web Interface 59

SNR [dB] = signal level [dBm] – noise level [dBm]

This information lets the sender adjust the transmission data rate to the optimal level to provide the best

possible throughput.

When you enable or disable WORP DDRS on the BSU, the BSU sends an announcement to the SUs and the

SUs enable or disable WORP DDRS automatically.

Note: DDRS threshold values must be configured in the BSU and SUs separately through the CLI or the

SNMP interface.

Both the BSU and the SU monitor the remote SNR. The BSU monitors and calculates the average remote

SNR for each SU that is registered. An SU monitors and calculates the average remote SNR for the BSU.

The DDRS Status is configurable only for the WORP Base Mode. For WORP Base Mode, select the DDRS

Status “Enable” or “Disable” from the drop-down box provided.

For the WORP Satellite Mode, DDRS Status is read-only parameter and its value is based upon the WORP

Base to which this SU is associated.

Transmit Power Control

By default, the unit lets you transmit at the maximum output power for the country or regulatory domain and

frequency selected. However, with Transmit Power Control (TPC), you can adjust the output power of the

unit to a lower level in order to reduce interference to neighboring devices or to use a higher gain antenna

without violating the maximum radiated output power allowed for your country. Also, most countries in the

ETSI regulatory domain require the transmit power to be set to a 6 dB lower value than the maximum allowed

EIRP when link quality permits. You can see your unit’s current output power for the selected frequency in the

event log.

The event log shows the selected power for all data rates, so you must look up the proper data rate to

determine the actual power level.

Note: This feature only lets you decrease your output power; it does not let you increase your output power

beyond the maximum allowed defaults for your frequency and country.

Select one of the following options and click OK at the bottom of the window. Your original output power is

adjusted relative to the value selected. The new setting takes effect immediately without rebooting:

TPC Selection

Maximum TX Power

dBm

0 16

-3 13

-6 10

-9 7

-12 4

-15 1

-18 (minimum TPC level) 0

Note: 24 Mbps and lower modulation have maximum +16 dBm TX power, 36 Mbps has maximum +13 dBm

TX power, 48 Mbps has maximum +12 dBm TX power, and 54 Mbps has maximum +11 dBm TX

power. Because higher modulation has a lower maximum TX power, the total TPC range is smaller

at a higher data rate. Because the minimum TX power is equal for all data rates, each TPC selection

has constant TX power for all data rates except where the maximum TX power is limited.