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Tait T-2000/II
Mobile scrambler radio

The T-2000/II was a series of mibile VHF and UHF radios, developed by Tait Communications in Christchurch (New-Zealand) in 1997, as the successor to the T-2000 series that was introduced in 1994. The T-2000/II series was popular with the autorities in New-Zealand but also with law enforcement agencies worldwide. In the Netherlands they were used by the police for surveillance and by the Mobiele Eenheid (Riot Police), often in combination with a voice scrambler unit.

The image on the right shows a typical Tait T-2010-331 that covers the MID-VHF band from 146 to 174 MHz. The radio has only four analogue channels, and is controlled by eight push-buttons at the right of the front panel.

The upper four push-buttons are used for selecting the required (pre-programmed) channel and are marked 1 - 4. A green LED above each button shows which channel is currently selected. The lower four buttons, each with their own LED, are freely programmable with the special programming software.
  
Tait T-2000/II

In the T-2010 shown here, the optional voice scrambler is fitted and the rightmost function button is programmed to turn in ON and OFF. When the voice scrambler is enabled, the gree LED above the button is ON. The scrambler was often used by the police in combination with the T-3000/II handheld radio. It made eavesdropping more difficult.

Tait T-2000/II Main T-2000/II unit Front view of the T-2000/II Rear view

T-2010 Controls
The image below shows the front panel of the T-3000/II that holds all controls. The volume knob at the top left is also used as the ON/OFF switch. At the bottom left is a 6-pin RJ12 socket that is used for the connection of accessories and for programming the radio. Normally the microphone is connected to this socket. The 12V DC power line and the antenna are connected at the rear.



Programming
The radio can be programmed with a variety of settings, four analogue channels and optional functions, by means of the special programming software. This was normally done by the supplier of the radios, at the factory, or, with large organisations, by the fleet manager.

As the radios are several years old now, the programming software is no longer available from the manufactuer (Tait), but appears to be present on the internet. We can not supply you with this software. We can only advise you to do a Google search for tait_2000.zip, or join the Tait Radio user group on Yahoo and search for information there.

Wiring diagram of a suitable programming cable

When programming the T-2000/II, the 6-pin RJ12 accessory connector at the font of the radio should be connected to the serial port of a DOS-based PC. The above diagram shows the layout of a suitable cable.

Connections
At the rear is an 8-pin socket for connection of the 12V DC battery voltage and an external speaker. The normal wiring for this connector is given below (looking into the socket at the rear of the device).

Connections at the rear of the T-2000/II

Factory ID
Each Tait T-2000 has a product code or 'ID' that can be used to determine the exact type of radio. The Product ID is usually found on a label on the heatsink at the back of the radio. With portable radios, such as the T-3000/II this label is usually found inside the battery compartment.


The diagram above shows the meaning of each of the digits of the Product ID [2]. It is believed that the last three digits (EFG) are used to denote a wide range of country/customer-specific hardware and software versions. For more information, please refer to the detailed list compiled by internet user 'niteviser' [3]. The most important digits are explained below:


Frequency range
10 Conventional 4 channel
15 Conventional 24 channel
16 Conventional
17 Conventional 80 channel
18 Conventional 100 channel
20 Conventional 100 channel
20 Conventional 1200 channel (if FG = 34)
21 Conventional
30 Trunked 6 call preset, 1023 trunked, 4 conventional
32 6 preset, 1023 trunked, 4 conventional, no control
33 Trunked 2 digit dial, 1023 trunked, 4 conventional
35 Trunked 3 digit dial, 20 call preset
40 Trunked direct call dial
50 Dual Mode, trunked and conventional (100 channel)
60 LTR Mobile, conventional
66 LTR Mobile, 10 systems x 10 groups, conventional

  

Frequency range
1 220-270 MHz
2 66-88 MHz
3 136-174 MHz
4 175-235 MHz
5 400-470 MHz
6 450-520 MHz
7 330-366 MHz
8 800 MHz (TX: 806-870 MHz, RX: 851-870 MHz)
9 360-400 MHz
0 500-530 MHz
F 300 MHz (TX: 300-336 MHz, RX: 330-360 MHz)
K 900 MHz (TX: 896-941 MHz, RX: 935-941 MHz)
W 300-338 MHz

  

Deviation and channel spacing
1 Wide band 5 kHz, 25 kHz channel spacing
2 Narrow band 2.5 kHz, 12.5 kHz channel spacing
3 Mid band 4 kHz, 20 kHz channel spacing
4 Dual wide/narrow band (programmable)

  

Frequency stability
1 5 ppm (-10 - 60°C)
2 2 ppm, later 1.5 ppm (-30 - 60°C)
3 3 ppm (-30 - 60°C)
4 ?
5 2.5 ppm, later 1.5 ppm (-30 - 60°C)
6 2 ppm, used in 6.25 kHz offset products (-30 - 60°C)
7 1.5 ppm (-30 - 60°C)

  

Country/Customer
A Standard
B Australia
C Standard
D Germany
E France
F UK
G M/A-Com
H China
I Australia
J USA/Canada
K Unimo
L South America
M Electcoms
N Taiwan
P USA/Canada
R South America
T USA/Canada
U Unbatched product
Y Argentina
Z France (Alcatel)

  

Factory fitted options
Please refer to the detailed list [3].

  

References
  1. Wikipedia, Tait Communications
    Retrieved March 2014.

  2. Repeater Builder, Technical Information on Tait Equipment
    Website, started 21 December 2005. Retrieved March 2014.

  3. Unknown author 'niteviser', Tait T2000 Series Model Recognition
    September 2010, Release 3. Retrieved March 2014 via Google.
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