Trango Broadband M2400S user manual AP Search, Rssi Command for Antenna Alignment

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Deployment

Once the SU is installed and aimed in the general direction of the AP it is time to perform an RSSI (relative signal strength indicator) test to determine the signal strength from the AP. Now you can precisely align the SU antenna for maximum signal strength.

Although it is possible to rely upon the Subscriber Unit’s LEDs for alignment, more precise RSSI readings are available from the command rssi.

In conjunction with the rssi command, it is also useful to perform the apsearch command. This command will tell you which AP is providing an adequate signal at the location of the SU.

AP Search

1.Ensure AP is in Opmode “ON.”

2.Run the apsearch command to verify which AP is providing the strongest signal strength.

 

 

In this example, an AP is detected on channel 1 with

#> apsearch

 

polarization horizontal. Furthermore, the Base ID is 1234

 

and the MAC address is 00 01 DE 18 6A 05.

 

 

Press [space] then [enter] to stop

 

 

1 2405 Hz 1234 DE 18 6A 05 [H: -55 dBm] [V: -75 dBm] [E: -99 dBm]

2 2415 Hz ----

FF FF FF FF [H: -98 dBm] [V: -98 dBm] [E: -99 dBm]

3 2425 Hz ----

FF FF FF FF [H: -99 dBm] [V: -99 dBm] [E: -99 dBm]

4 2435 Hz ----

FF FF FF FF [H: -99 dBm] [V: -98 dBm] [E: -99 dBm]

5 2445 Hz ----

FF FF FF FF [H: -99 dBm] [V: -98 dBm] [E: -98 dBm]

6 2455 Hz ----

FF FF FF FF [H: -99 dBm] [V: -99 dBm] [E: -99 dBm]

7 2465 Hz ----

FF FF FF FF [H: -99 dBm] [V: -99 dBm] [E: -99 dBm]

8 2475 Hz ----

FF FF FF FF [H: -99 dBm] [V: -99 dBm] [E: -99 dBm]

#>

 

 

RSSI Command for Antenna Alignment

Step 1 Telnet into the SU (while in Opmode “OFF”). Use the freq and antenna command to note current radio settings.

Step 2 Run the rssi command. The telnet session screen will begin a continuous readout of the received signal strength. As you read the RSSI reading, move the antenna in the horizontal and vertical planes until the maximum RSSI reading is achieved. To allow for plenty of fade margin we recommend a continuous RSSI reading of -78 dBm or better. An RSSI of –88 dBm will allow you to establish a wireless link, but there may not be sufficient fade margin for reliable and continuous operation.

Example 1 has the wrong freq and antenna settings: #> rssi

[1] peak -99 dBm avg -99 dBm

[2] peak -99 dBm avg -99 dBm

[3] peak -99 dBm avg -99 dBm

Example 2 has the correct freq and antenna settings: #> rssi

[1] peak -38 dBm avg -80 dBm *

[2] peak -38 dBm avg -75 dBm **

[3] peak -37 dBm avg -75 dBm **

Step 3 If it is not possible to receive an adequate RSSI reading it may be necessary to reorient the AP (up/down, left/right) to increase the output power. Or move the SU to a location with better line-of-sight to the AP. Alternatively consider using external antennas on either the AP or SU or both.

Once you are satisfied with the RSSI reading, tighten down the SU in the optimum position. To stop the RSSI continuous readout hit SPACE ENTER.

Trango Broadband Wireless — User Manual M2400S Rev A

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Contents M2400S GHz Wireless Broadband System Table of Contents Table of Figures Warranty Information Firmware Notifications PrefaceFCC Information CanadaIntroduction OverviewAuto-retransmit Feature ARQ SmartPolling & Bandwidth ThrottlingHardware Overview M2400S AP and SU Hardware ComponentsConnections and Power Getting StartedWiring Diagram Radio Management ConceptsBrowser Interface OpmodeBrowser Interface Login Primary Features and Pages of the Browser Interface Command Line Interface Telnet ip address of radioTroubleshooting Basic Configuration via Browser Interface Configuring the AP Subscriber Unit Database SudbThis section you will Creating an SU in the Sudb CIR DownConfigure Other Basic AP Parameters Default OpmodeIP Address, Subnet Mask, and Gateway Active Channel/PolarizationBasic Configuration via Browser Interface Configure Basic SU Parameters SU Basic SetupLED Summary Link ControlRF Link Loopback Test Advanced Setup SU Ranging TestOther Key Parameters Site Survey Basic Configuration via CLI Access Point Basic SettingsSet baseid baseid Set defaultopmode on or off Set defaultopmode on time secIpconfig new ip new subnet mask new Set apid apid 00-FF in HEXPower set minmaxdBm Sw 0 onoff default is onOn/off command Sw 3 onoff default is offSubscriber Unit Database Settings Sw 7 onoff default is onRemarks remarks Sudb add suid prreg device id suid SU IDSubscriber Unit Basic Settings SU System Information Parameters and Related Commands Targetap apidAntenna h v e Sw 0 onoffSw 1 onoff Sw 2 onoffMounting Hardware Part Number QTYInstallation Notes Cabling and Grounding ConsiderationsCommand survey time antenna DeploymentSite Selection AP Search and SU Antenna Alignment Site Survey ExampleRssi Command for Antenna Alignment AP SearchLink Management Commands SU Alignment Using LEDsSu ping suid Su suid Su linktest suidSu testrflink suid ARQ with Selected Repeat and Multirate Feature Radio Management Access Via TCP/IPManagement SU Management from APLoading Multiple SU’s into Sudb using Dload Command Su password suid all rw ro new password new passwordSu ipconfig suid new ip new subnet new gateway Snmp Setup Objects for Monitoring and ControlSU Bandwidth Monitoring AP Bandwidth MonitoringManagement Appendix a Command Set Reference Command Radio Description AccessReboot unit Ro/rw Remarks Su ipconfig suid new IP new Default = Tftpd Appendix B Specifications Radio Transmit SpecificationsReceiver Specifications Ethernet I/O Specifications Power SpecificationsMechanical and Environmental Specifications Standard External Power SupplyStandard External Power-over-Ethernet Junction Box Integrated Antenna APIntegrated Antenna SU
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