User's Manual

MDR2400-SR, MDR5800-SR and Orion 5825-SR
Issue 10 Page 42
5 Antenna Alignment and Software Setup
This chapter describes the procedure for software setup and antenna alignment. The
setup is done with a laptop / PC running the supplied NMS Graphical User Interface
(GUI) software. See chapter 6 for details on using the NMS / GUI.
5.1 Installation Equipment Required
The following tools and instruments are required for software setup and aligning the
antenna:
hh. RSSI test cable
ii. Voltmeter
jj. Wrench / spanner (see appropriate details in installation chapter depending on the
antenna being used)
kk. PC with NMS software and supplied serial data cable.
ll. Binoculars (optional) used for locating the far end site. This will assist in the
antenna alignment operation.
mm.GPS or Standard Compass (optional) used for locating the far end site. This will
assist in the antenna alignment operation.
nn. Bit Error Rate Tester and connecting leads.
5.2 Information Required
You should know:
• the proposed frequency channel plan for each station.
• the expected receive level based on the chosen system configuration and a path loss analysis.
5.3 Antenna Alignment
5.3.1 Introduction
The OU should be installed on both sites before alignment starts. Perform the
following steps at both stations:
1. Switch the Indoor Unit power ON.
2. Install and run the NMS Software application.
3. Configure the radio channel plan as required.
4. Set the transmitted power to maximum.
5. Perform a RF loopback test at each site before starting the alignment
procedure.
5.3.2 Alignment Procedure
1. Locate the far site and point the antenna to the antenna at the far site, as
accurately as possible using binoculars or a compass.
2. Connect the multimeter to the RSSI connector on the OU using the supplied
RSSI test cable and set the multimeter to measure volts.
3. Check the RSSI level and refer to the figure below for received power level.
4. Align the antenna until the maximum RSSI is attained.
5. Secure the antenna.
6. Measure the RSSI level and record the value (see section 5.7).
7. Compare with the value with that calculated for the link i.e. using the path loss
calculation done when planning the link.