User's Manual
Table Of Contents
- Installation and Operation Manual Draft in Progress
- Contents
- Preface
- 1 Description
- 2 General Safety and Regulatory Information
- 3 Operation
- 4 Working with Base Stations from Your PC
- 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 Configuring Single Base Stations
- 4.4.6 Configuring Base Stations in a Channel Group
- 4.4.7 Setting Up Custom Alarms
- 4.4.8 Disabling the Front Panel Keypad
- 4.4.9 Preparing to Download Firmware
- 5 Installation
- 6 Maintenance
- 7 Troubleshooting
- 8 Replacing Modules
- Appendix A – Interface Pin Allocations
- Appendix B – Inter-Module Connections
- TaitNet P25 Glossary
- Tait Software License Agreement
DRAFT 4
116 TaitNet P25 Glossary TB9400 Installation and Operation Manual
© Tait Electronics Limited September 2011
C
C4FM Compatible Four-level Frequency Modulation. A modulation scheme
defined in the P25 CAI standard for 12.5 kHz bandwidth.
CAI Common Air Interface. The over-the-air data formats and protocols defined
by the APCO P25 committee.
call A complete exchange of information between two or more parties. A call
requires a receive signal path and a transmit signal path. In conventional
systems, a call is an over, but in trunked systems, a call may be a conversation,
made up of a number of overs.
Cartesian Loop The reciter’s RF output is fed to the PA through the transmit forward path.
A coupled signal from the PA’s RF output is fed back to the reciter through
the transmit reverse path. The reciter uses this feedback through a Cartesian
Loop to linearize the RF amplification system. Linearization is required to
accurately transmit complex waveforms which vary in frequency and
amplitude, such as those used in P25 Phase 2.
central voting Voting that is centralized at one member of the channel group.
channel 1. A path through which signals can flow.
2. In the RF domain, a frequency pair (or just a single frequency in a simplex
system).
3. A set of configuration information that defines the frequency pair and
other related settings (a channel configuration). “Channel” has this meaning
in the web interface.
channel group A single logical channel consisting of a set of base stations. The members of
a channel group are linked by an IP network and share a common multicast
IP address.
channel profile A named group of configuration settings that help to define the properties
of a channel. Each channel in the channel table must have a channel profile
assigned to it.
channel spacing The bandwidth that a channel nominally occupies. If a base station has a
channel spacing of 12.5 kHz, there must be a separation of at least 12.5 kHz
between its operating frequencies and those of any other equipment.
channel table The base station’s database of channel configurations.
CODEC A device which combines analog-to-digital conversion (coding) and digital-
to-analog conversion (decoding).