Service Manual Part 1
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The T2000 Series II is a high performance mobile two way radio. It covers ten frequency
bands between 66 and 870MHz, and is available in both trunked and conventional mod-
els.
Operation of the T2000 is by handheld microphone, a press-to-talk switch and a range of
front panel function keys. The T2020 and T2040 models are fitted with an LCD display
and alphanumeric keypad.
Most of the functions of the T2000 are microprocessor controlled. The system software is
stored in a read only memory (ROM), while the data is stored in a non-volatile memory
for ease of programming. Operational parameters can be programmed without opening
the radio, via the front panel microphone socket.
The T2000 uses a synthesiser with a single VCO switched between transmit and receive.
A plug-in TCXO PCB is used to provide a highly stable reference frequency, and dual
point modulation gives a flat modulation response at the synthesiser.
The standard T2000 RF power output is 25W, except in the T2000-800 which delivers
15W. The receiver is electronically tuned across the entire frequency band and contains
an IF noise blanker and RSSI facility. A maximum of 4W of audio is delivered to a 4Ω
speaker.
The RF and logic PCBs are shielded from each other in a diecast aluminium chassis, and
are connected by two plug-in looms. The T2000 top and bottom covers are also diecast
aluminium.
There is provision within the radio to mount option PCBs and a 9 or 15 way output con-
nector which is used for options requiring connection to external equipment. Standard
options include hands-free operation, line control interface, signalling and data trans-
mission.
The DC supply to the radio must be negative earth and may be between 10.8 and 16V.
The T2000 is protected against reversal of the DC supply and is provided with overvolt-
age protection.
If further information is required about the T2000 or this Manual, it may be obtained
from Tait Electronics Ltd or accredited agents. When requesting this information, please
quote the equipment product code (e.g. T2010-512-002) and serial number. In the case of
the Service Manual, quote the product code (e.g. M2000-00-300), and for circuit dia-
grams quote the ‘Title’, ‘Internal Part Number’ (IPN) and ‘Issue’.