Tait TB9100 User Manual

76 Installation TB9100/P25 CG/P25 TAG Installation and Operation Manual
© Tait Limited March 2014
Cross-Mode
Connection
The analog line of a TB9100 base station can be connected to an analog FM
base station to form a cross-mode repeater. The following circuit shows how
this can be done using two TB9100 base stations. Vary this as needed to
reflect the pinouts of the third-party base station.
The 12 V supply can be provided by the auxiliary power output of the
PMU.
Circuit Protection It is extremely important that the analog line is adequately protected against
lightning strike and other adverse events. In this respect, it is incumbent on
the installer to comply with the standards organization or regulatory body
of the country of installation. While it is outside the scope of this manual to
provide comprehensive information on this subject, the following advice is
offered. It may or may not be compliant.
E&M Circuit
The external circuit resistance in both the E&M input and the E&M output
must be such that the maximum DC current flow does not exceed 120mA
under any conditions. Failure to observe this limit might mean that the
protection devices on these leads do not unlatch after a transient event.
Connecting the E&M input or E&M output to a power supply capable of
supplying more than 1A may cause severe damage, due to overheating of
EMC filter components in these circuits, should the protection devices
trigger.
Analog line connections of
TB9100 base station
running in digital P25 mode
Tx key relay
From RF Rx
To RF Tx
Rx gate
contact
+ 12 V
0 V
1
2
3
4
5
6
7
8
Analog line connections of
TB9100 base station
running in analog FM mode
Tx key relay
From RF Rx
To RF Tx
Rx gate
contact
1
2
3
4
5
6
7
8
Analog line connections of
TB9100 base station
running in analog FM mode
Analog line connections of
TB9100 base station
running in digital P25 mode

Tait TB9100 Specifications

General

Brand	Tait
Model	TB9100
Category	Accessories
Language	English