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

TB9400 Installation and Operation Manual

© Tait Limited April 2014

A 1PPS signal is required for simulcast base stations. Use a 50

Ω coaxial 

cable (RG58 or RG223) to connect the source to the base station’s 1PPS 
input. You can daisy-chain up to eight base stations using F-junctions. We 
recommend that the cable length between the first and last load is kept to a 
minimum. This will reduce any propagation variation between base 
stations. The maximum overall cable length is 30m. Terminate the last 
connection with a 50

Ω resistor, otherwise reflections of the 1PPS pulse 

may occur. 

A 1PPS signal will be required for all base stations operating in a P25 
Phase 2 system. If you intend to upgrade TB9400 base stations to P25 
Phase 2 operation at a later date, we suggest that you provide the 1PPS 
source, or at least the necessary cables, at the time of installation.

The RJ-45 socket on the reciter’s rear panel provides the 10BASE-T or 
100BASE-T Ethernet connection to the other devices in the network. Use 
Cat-5 cable to connect this socket to the Tait P25 Network via a router or 
switch. 

If necessary, refer to 

 for a list of 

Ethernet connection pin allocations.

The longest length of cable must be between 

the source and the first base station

use short lengths of cable 

between each base station

maximum of eight base station 

loads on one 1PPS output

50 

Ω termination