Installation and Operation Manual

Table Of Contents

TB7300 Installation and Operation Manual Description 19

1.5.1 Signal Paths

The following figures provide an overview of signal paths within the

control boards for both software applications:

Digital P25 signals from the receive RF interface pass through the digital

receiver and P25 modem to the control software in the control processor.

The control software passes the signal through the Ethernet interface to the

site controller, to the console gateway (conventional networks), or for a

satellite, to the central voter in a simulcast system.

Input to the Ethernet interface can be from the site controller, from the

console gateway (conventional networks), or from the central voter in a

simulcast system. These inputs are processed by the control processor 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.

Input to the Ethernet interface is from the node controller. This input is

processed by the RISC and passed through the DMR modem to the

transmitter.

Analog FM signals from the receive RF interface pass through the digital

receiver and are converted to G.711 before being modulated and

retransmitted.

Figure 1.2 Control board signal paths