User Manual Part 1

Lynx.GX Installation and Management
PLANNING FOR INSTALLATION
There are several planning factors to be considered prior to installing the radio system. In addition to selecting
the installation site, you must:
Calculate:
º Required RSL and fade margin to achieve availability objectives
º Required path availability
º Anticipated Multi-Path Reflection Points
Determine:
º System Frequency Plan
º Required Antenna Size and Type
º Required Antenna Mounting Height to obtain proper Path Clearance
º Required Transmission Line Types and Lengths
Plan for:
º The unit’s continuous power consumption needs
º Antenna installation
º Lightning protection and system grounding
º Radio hardware mounting
º Cable installation including egress
º Pre-testing Radio Equipment (back-to-back test procedure)
For detailed information regarding these planning items, see “Installation Planning” on page 46.
TROUBLESHOOTING HINTS
▪ Most common problems are poor transmission line connector terminations.
º Best way to test is a return loss measurement (VSWR).
º Basic function can be tested using a continuity and short test with DMM.
º The transmission line can be evaluated with a network analyzer connected to both ends of cable
through the cable and comparing when spectrum analyzer is connected directly to the radio without the
cable.
º Transmission line loss can be evaluated with a back-to-back Receive Signal Level (RSL) test.
º “Tap and wiggle” testing of all terminations while monitoring RSL and alarms can expose poor
terminations.
▪ Could be a faulty antenna.
º Very hard to tell without swapping.
º VSWR test on antenna feed can identify antenna problems.
º “Tap” test can expose a faulty feed for moisture or connector problems.
▪ Could be a faulty radio.
º Back-to-back RSL testing normally exposes a faulty radio.
▪ Could be a path obstruction or multipath reflection
º Re-evaluate path clearance including Fresnel zone criteria.
º Driving or walking the path may be required to identify potential obstructions.
º Re-check path calculations for multipath reflection points along the paths
Chapter 1. Introduction 7