Tait T2000-A76 Operation Manual - Compatibility
8
M2303-00-P00-805
March 2003
3
Compatibility
T201X Radio Firmware
When programming the T201X radio firmware for use with the CCDI, use version 3.01 or greater.
Retrofitting an A76 AVL modem into a T201X radio, radios require radio firmware version 2.22 or later. If your
radio uses an earlier firmware version, a new microprocessor can be purchased as a separate item. Contact
your nearest authorised Tait dealer.
Remote Radio PGM Settings
When the A76 AVL modem board is fitted, the T201X PGM program settings have the following constraints:
• ‘BCD Channel Selection’ should be enabled and polarity set to Normal so that the A76 can change the
radio channel.
• Economy mode reduces the radio’s power consumption when it is idle. When economy mode is active
and there has been no valid activity on a channel for the duration of the economy mode timer, the
radio begins economy cycling. This means that the beginning of a transmission may be lost if it is
received after a period of inactivity.
If ‘Economy mode’ is enabled in a T201X with a CCDI modem fitted, set the default
Lead In Delay
in
the A76 configuration to 200 ms or greater.
The Lead In Delay can be reprogrammed as low as 40 ms, but the Economy mode must be disabled.
Despatcher Radio PGM Settings
The despatcher radio may be a Tait Orca, a Tait Radio Modem or a T2000 with a A75 fitted. Regardless of
which radio is used, the modem must have Auto Acknowledge set to disabled.
GPS Receiver
The GPS receivers supported must use the National Marine Electronics Association (NMEA) 0183 version 2.01
(or compatible) RMC serial communication standard with suitable transmission rate and data format.
Tait Supports two different types of receivers.
The T2002-A00 GPS Receiver
The T2002-A00 GPS Receiver is a weatherproof receiver suitable for mounting outside a vehicle. It requires
13.8V which needs to be supplied on pin 6 of the RS232 socket at the rear of the T201x. This is generally
supplied from S14 pin 1 of the T2000 Logic PCB.
The T2002-A00 has an optional mounting bracket (T2002-A01).
The T2003-A00 GPS Receiver
The T2003-A00 GPS Receiver is suitable for internal mounting. It requires 5V which needs to be supplied on
pin 4 of the RS232 socket at the rear of the T201x. This is generally supplied from S14 pin 2 of the T2000
Logic PCB.