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 65
© Tait International Limited November 2019
5.7.5 Connecting a 1PPS Source
A 1PPS signal is required for simulcast base stations. Use a 50Ω coaxial
cable (RG58 or RG223) to connect the source to the base station’s 1PPS
input. You can daisy-chain up to eight base stations using T-junctions. We
recommend that the cable length between the first and last load is kept to a
minimum. This will reduce any propagation variation between base
stations. The maximum overall cable length is 30m. Terminate the last
connection with a 50Ω resistor, otherwise reflections of the 1PPS pulse
may occur.
Notice If 1PPS is used, then 1PPS and NTP must both be derived
from the same time base. Normally this will be a GPS disciplined
source.
Figure 5.6 Daisy-chaining a 1PPS input
50Ω termination
The longest length of cable must be
between the source and the first base
station
Use short lengths of cable
between each base station
Maximum of eight base station
loads on one 1PPS output