Tait International Limited TBCK4B Manual Do Utilizador

TB9400 Installation and Operation Manual

© Tait Electronics Limited September 2011

 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. 

When you program the 

base station

 or run invasive diagnostic tests, the 

base 

station

 must 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