User's Manual

3800 Information
1 -4 3800 Digital Repeater Operating Manual October 2009
channel failures or processing errors to the Site Controller. One Channel Controller is used for each radio
repeater subsystem (in multiple repeater systems).
TXDSP Module
The TXDSP module manages the repeater radio transmitter interface. This module provides channel
encoding with forward error detection and correction coding. It receives data packets from the channel
controller and creates a signal for the transmitter.
Radio Transmitter
The Radio Transmitter is digital synthesizer based to ensure on-frequency and high stability operation. It
converts the processed signal from the TXDSP module into a radio frequency (RF) signal for
transmission.
Radio Receiver
The Radio Receiver is digital synthesizer based to ensure on-frequency and high stability operation. It
receives and converts the radio frequency signals for processing by the RXDSP module.
RXDSP Module
The RXDSP module manages the repeater radio receiver interface. It processes the received signal
samples from the radio receiver into data packets. The module then sends the data packets to the Channel
Controller.
Ethernet Interface
The repeater communicates over its Ethernet interface with the Site Controller, Dispatch Console, and
Network Management System (NMS).
EIC Module
The EIC module provides a user interface to the repeater including a 2-line display and push button rotary
knob for menu navigation.