Tait International Limited TBCH1B User Manual

TB9400 Installation and Operation Manual

© Tait Limited November 2013

Much of the circuitry in the base station is common to all frequency bands, 
and is therefore covered by a single description in this manual. In some 
cases the descriptions refer to specific bands or sub-bands, and these are 
identified with the letters listed in the following table.

The TB9400 is designed for operation in a Tait P25 trunked radio network. 
It can operate as a single base station or as part of a simulcast channel 
group, and as a traffic channel or control channel. 

In a trunked simulcast network, the transmitters in the channel group are 
synchronized and transmit simultaneously on the same frequency. Each 
transmitter needs a highly accurate 1PPS pulse and an external frequency 
reference, so that it can time transmissions with the required accuracy. We 
also recommend using an NTP server at each site, as this will ensure a 
common timestamp in logs across all units in the system.

The base station can be provided as a receive-only variant in systems that 
need sites to enhance the receive coverage. The reciter in a receive-only 
base station is physically unable to transmit.

For more information, refer to the appropriate Tait P25 System Manual.

B band

B3 = 148MHz to 174MHz

H band

H1 = 400MHz to 440MHz
H2 = 440MHz to 480MHz

K band

K4 = 762MHz to 870MHz

a

a. The actual frequency coverage in this band is:

Transmit: 762MHz to 776MHz, and 850MHz to 870MHz
Receive: 792MHz to 824MHz