Installation and Operation Manual
Table Of Contents
- Installation and Operation Manual
- Contents
- Preface
- 1 Description
- 2 General Safety and Regulatory Information
- 3 Operation
- 4 Connecting to the Base Station
- 4.1 PC Recommendations
- 4.2 Connecting Your PC to the Base Station
- 4.3 Working with the Web Interface
- 4.4 Basic Tasks
- 4.4.1 User Settings
- 4.4.2 Taking the Base Station Offline
- 4.4.3 Troubleshooting Alarms
- 4.4.4 Working with Configuration Files
- 4.4.5 Single or channel group base stations
- 4.4.6 Marshaling or transmit delay
- 4.4.7 Configuring Receive-Only Base Stations
- 4.4.8 Setting Up Custom Alarms
- 4.4.9 Uploading Firmware from the Base Station
- 4.4.10 Downloading Firmware from a Package Server
- 4.4.11 Activating New Firmware
- 4.4.12 Subaudible Signaling
- 4.4.13 SNMP Network Management
- 5 Installation
- 6 Maintenance
- 7 Troubleshooting
- Appendix A – Interface Pin Allocations
- Appendix B– Installing the Firmware Package
- Glossary
- Tait General Software License Agreement
TB7300 Installation and Operation Manual Installation 63
© Tait International Limited November 2019
5.7.3 Connecting RF
Notice Do not remove the load from the base station while it is trans-
mitting as this may damage the PA output stage. Before disconnecting
RF cables, put the base station into ‘Offline’ mode to prevent any trans-
missions.
The RF input to the base station is via the marked BNC connector on the
rear panel. The RF output is via the N-type connector on the rear panel
(refer to Figure 5.4 on page 61).
Cables and antennas should be of high quality. Solid shield heliax type
cables are best, but if braided shield cables must be used for short distances,
their braids must be silver-plated.
Recommendations
for Installing the
Base Station
We recommend the following installation procedures, which should protect
the PA from damage under all but the most extreme operating conditions
1. Do not connect the base station directly to the antenna. Fit an isola-
tor or duplexer between the base station and the load. Fit the isolator
as close as possible to the RF output connector on the base station.
Do not connect any switching equipment between the isolator and
the base station, unless the switch cannot operate while there is RF
present (i.e. the base station is transmitting).
2. Fit a surge suppressor to the antenna cabling where it enters the
building.
3. Inspect all cables and equipment connected to the base station for
defects.
A broken antenna or ice is unlikely to cause damage to the PA.
Explanation The circuit design of the PA protects the circuitry from high VSWR. This
makes it difficult to damage the RF power device by keying the PA into a
mismatched load, or if the load deteriorates over even a short period of time
(milliseconds).
However, it is possible to damage the device if all the following conditions
happen at the same time:
■ there is a step change in the PA load (for example, the load is removed)
■ the PA is transmitting
■ the feed line loss between the PA and the mismatch is <1dB
The effect of such conditions is variable: some devices will not be
destroyed, and some may fail after repeated load interruptions.