Tait International Limited TBCH1A ユーザーズマニュアル

TB9400 Installation and Operation Manual

© Tait Limited April 2014

 gives an overview of signal paths within the reciter. 

Digital P25 signals from the receive RF interface pass through the digital 
receiver and P25 modem to the control software in the RISC processor. The 
control software passes the signal through the Ethernet interface to the site 
controller, or to the central voter in a simulcast system.

Input to the Ethernet interface can be from the site controller, or from the 
central voter in a simulcast system. These inputs are processed by the RISC 
and passed through the P25 modem to the transmitter. If the base station is 
itself a central voter, this input can also be a received signal, which is voted 
on and sent back through the Ethernet interface to the site controller.

The base station normally operates in Online mode, but you can put it into 
Offline mode via its web interface.

In Online mode, the base station performs its normal functions. 

Some procedures, such as activating firmware or running certain diagnostic 
tests, require the base station to be in Offline mode. This takes the base 
station out of service. However, the front panel is still operational and can 
be used in the normal way. 

Transmit
RF Interface

Transmit
RF Interface

(feedback
from PA)

Receive
RF Interface

Ethernet
Interface

Protocol

Stack