MP.11 and MP.11/a Quick Install Guide
Chapter 5. Web Interface
57
Transmit Power Control
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 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. For example, the event log shows:
0 00:00:08–INFO- Final Power 6 Mb 20 dBm, MaxRD 30 dBm, MaxEdge 31 dBm, -TPC Scale 0 dBm – Ant Red 0 dBm*
0 00:00:09–INFO- 20 dBm | 20 dBm | 20 dBm | 20 dBm | 20dBm | 19 dBm | 17 dBm | 14 dBm |
The above shows that the output power is set at 20 dBm for the data rate 6, 9, 12, 18, or 24 Mbps or at 19
dBm when the selected data rate is 36 Mbps. The first line shows that 6 Mbps is selected, so the transmit
power is 20 dBm.
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:
-0 dB
-3 dB
-6 dB
-9 dB
-12 dB
-15 dB
-18 dB (minimum TPC level)
Enable Turbo Mode (MP.11a ONLY)
Check this box to enable
Turbo Mode
.
Turbo Mode
currently is supported only in the United States.
Turbo
Mode
utilizes two adjacent channels for wireless data transfer.
If DDRS is enabled, turbo mode cannot be enabled. The reverse is also true.
Channel Spacing
Set channel spacing to
20 MHz
. (The channel spacing shows
40 MHz
when turbo mode is in effect.)
Frequency Channel
The frequency channel the MP.11 (802.11b) uses for communicating with remotes. This frequency channel
can be set in the range 1 to 11 for the USA and Canada, or 1 to 13 for Europe, or 1 to 14 for Japan (see
“Radio Specifications”
on page 130
).
For the MP.11a (802.11a), when DFS is enabled for the selected country,
the
Frequency Channel
field
appears as follows:
Frequency Channel – DFS, Auto selected 5.47 – 5.7 GHz
. You can monitor the DFS scan, if enabled, by refreshing the Web page.
