MP.11 and MP.11/a Quick Install Guide
Chapter 3. Management Overview
27
MP.11a COUNTRY OPTIONS
Selecting a Country
The Tsunami MP.11/a
Configure System
window provides a selectable
Country
field that automatically provides
the allowed bandwidth and frequencies for the selected country as well as, where applicable, Dynamic Frequency
Selection (DFS) and Transmit Power Control (TPC).
MP.11/a kits sold in the United States are pre-configured to scan and display only the outdoor frequencies
permitted by the FCC. No other
Country
selections, channels, or frequencies may be configured. MP.11/a kits
sold outside of the United States and Canada support the selection of a
Country
by the professional installer.
Click the
Configure
button and the
System
tab; then select the appropriate country for your regulatory domain
from the
Country
drop-down box.
Continue configuring settings as desired; then click the
Commands
button and the
Reboot
tab to save and
activate the settings. Alternatively, if you want to save the configuration settings to the flash memory but not
activate the settings, use the
save config
CLI command.
The Dynamic Frequency Selection (DFS) and Transmit Power Control (TPC) features are enabled automatically
when you choose a country with a regulatory domain that requires them. The
Country
selection pre-selects and
displays only the allowed frequencies for the selected country.
Dynamic Frequency Selection
A country selection with DFS enabled causes the MP.11a Base Station to come up in scan mode. It scans the
available frequencies and channels to avoid radar and select a channel with the strongest signal.
Note:
Scanning is performed only on the frequencies allowed in the regulatory domain of the country selected,
when it is required for radar detection and avoidance.
The MP.11a Subscriber Unit also comes up in scan mode to scan all available frequencies to find a Base Station
with which it can register. Scanning may take several minutes. Scanning is indicated by a flashing green LED
(the fourth LED in the case of the Base Station; the Wireless LED for an SU). When the link is established, the
fourth LED on the BSU goes off. The third LED on the SU continues flashing until it establishes a WORP link.
After establishing a WORP link, the LED stops flashing and continues to glow green.
See “Dynamic Frequency Selection” on page 82 for more information.
Transmit Power Control
Transmit Power is a manual configuration selection to reduce the output power in the radio. The output power
level for the operating frequency can be found in the
Event Log
of the MP.11a embedded software.
By default, the Tsunami MP.11a 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 from 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 radio’s current output power for the selected frequency in the
event log.
