T2000ii radio programming and adjustments. December 2019
T-2000/II is a series of mobile VHF and
UHF radios, developed by Tait
Communications in Christchurch (New-Zealand) in the late 1990s.
The Tait 2000II series are fantastic
radio for conversion to Amateur Radio bands as it requires few
adjustments and the programming software is very straightforward. The radio identification labels indicate that the
radio I have for conversion has 4 channels, has a frequency range of
136Mhz to 174Mhz and is set for a narrow FM deviation of 2.5khz. The radio also has no microphones or 12-volt power cables.
T2000 Series Model variant Recognition
T 2 0
= Model Variant: 10 = Conventional 4 Channel
= Frequency Span: 3 = 136-174 MHz
C = Deviation:2 = Narrow Band (2.5 kHz) (12.5 kHz channel space)
D = Frequency
Stability 1 = 5ppm (-10-60°C)
E = CountryF = UK (EMC standard)
FG = Factory
OptionsOO = ?
The 12v connector is not a common type,
however pre-assembled leads are available for Tait 2000 series radios
at low cost on eBay and generally do not come with inline fuses.
To disable the internal speaker and use
an external speaker only, cut the internal speaker link wire and the
speaker is disabled. See below:
Programming cable connects at the
microphone RJ12 socket. The programming cable consists of a 6-pin RJ12
connector to a DB9 serial/comms port connector to the computer. The
cable used in this instance was made from an old phone cable that was
terminated to a 9-pin serial port connector as below in figure 2.
TheTait TN-1228-SR CPA
v3.00 programming application that despite its age will run on
Windows 7 (64bit) machine and is compatible with T2010ii, T2015ii and
With radio powered up and the
programming cable connecting the radio to the computer.
a Radio to your PC with the programming cable’s 9 pin
connector at the computer’s serial port and connect the RJ-12
telephone-style plug to the radio’s microphone socket.
·Make sure the radio is
connected to a power source and the power is on.
·Switch the radio on.
·Select the Radio > Read
menu option, or select the Read button from the toolbar.
the programming database is read from the radio, the application will
indicate the radio model, Band and radio serial number.
Subaudible Signalling form is divided into two tabs. For T2010/T2015
radios, only Signalling is available.
for CTCSS and DCS transmissions are determined in the Signalling tab.
CTCSS and DCS for individual channels are set in the CTCSS/DCS
fields (Channels form).
Filter Enabled For
Rx CTCSS/DCS Filter Enabled For field determines the settings for the
radio’s CTCSS/DCS filter. The filter can be automatically switched
off for channels that do not have CTCSS or DCS.
All: The filter is active on
all channels, regardless of whether they are programmed with CTCSS or
CTCSS/DCS: The filter is
active only on channels that have CTCSS or DCS programmed for the
Tx DCS Polarity
Tx DCS Polarity field sets the polarity of all transmitted DCS codes
defined in the Tx Sig field
(Channels form). Some systems require the DCS code to be inverted when
transmitted. Select Normal or Inverted.
Rx DCS Polarity
Rx DCS Polarity field sets the polarity of all received DCS codes
defined in the Rx Sig field
(Channels form). Select Normal or Inverted.
the Tx CTCSS Reverse Tone Burst field is checked, a reverse tone burst
on the end of a CTCSS transmission speeds up the shutdown of CTCSS
decodes, providing your decoder is capable of detecting a reverse tone
burst. When this field is unchecked, no reverse tone burst is
fields in the Receiver Monitoring form set properties related to the
operation of the radio’s monitor function.
Monitor Function Disables
Monitor Function Disables field determines which mutes are to be
disable by the monitor function.
None (T2010 only): When the monitor function becomes
active, no mutes are disabled.
All Mutes: Both the selective call mute and the
sub-audible signalling mute (CTCSS and DCS) are overridden when
monitor is activated. The radio user is able to hear all traffic.
Selcall Mute: Only the Selcall mute is overridden when
monitor is activated. The radio
user only hears traffic that has sub-audible signalling.
to: All Mutes
Auto Quiet Time
Auto Quiet Time field sets the duration of the auto quiet timer. When
the programmed duration of the auto quiet timer expires, monitor
deactivates and the radio resumes normal operation. Enter a value
between 1 and 250 seconds (T2010 and T2015 radios) or 255 seconds
(T2020 radios) in steps of 1 second, or 0 to disable the auto quiet
Monitor State at Power Up
radios only. The Monitor State at Power Up field determines whether
monitor is inactive or active when the radio is turned on.
available for the T2010
Automatic Monitor with Call Setup
radios only. The Automatic Monitor with Call Setup field determines
whether monitor is activated when an outgoing Selcall call is made.
For this field to be available, Selcall hardware must be installed in
Checked: Monitor is activated when a Selcall call is
Unchecked: The radio can transmit Selcall calls without
activating monitor. Monitor must be activated via another method
before communication commences.
[MON] Key Short Press
[MON] Key Short Press field sets the behaviour of the radio when the
monitor key is given a short press.
the [MON] Key Short Press field is checked, a short press of the
monitor key toggles monitor on and off. If unchecked, a short press of
the monitor key only disables monitor.
[MON] Key Long Press
[MON] Key Long Press field sets the behaviour of the radio when the
monitor key is given a long press.
the [MON] Key Long Press field is checked, a long press of the monitor
key activates the squelch override function. This can be useful where
there is activity in marginal areas and the signal is too weak to be
squelch override is already active when the monitor key is pressed,
then squelch override is deactivated and monitor is activated.
Cancel Call Indicators on Request
radios only. When the Cancel Call Indicators on Request field is
checked, the ringing tone and the call indicator light will be
cancelled if a radio monitor reset is received.
option is only available if Selcall is fitted.
available for the T2010
Open Monitor on PTT Press
radios only. When the Open Monitor on PTT Press field is checked, the
audio monitor opens when the PTT key is pressed.
available for the T2010
the Hooks-witch Monitor field is checked, the monitor is activated
when the hook-switch is open. Setting. Setting this option does not
affect any other scanning functions of the hookswitch.
options are set in the Transmitter Setup form.
Transmit Timer Duration
Transmit Timer Duration field sets the duration of the transmit timer,
which determines the longest continuous transmission permitted by the
radio. Enter a value between 1 and 250 seconds in steps of 1 second,
or 0 to disable the transmit timer. The recommended value is 60
the transmit timer expires, the radio may be prevented from
transmitting for the duration of the transmit lockout timer, which is
set in the TransmitLockout Duration field.
Transmit Lockout Duration
Transmit Lockout Duration field sets the duration of the transmit
lockout timer. Enter a value between 1 and 250 seconds in steps of 1
second, or 0 to disable the transmit lockout timer. The recommended
value is 30 seconds.
Tx Inhibit field sets the transmit inhibit conditions (None, Busy or
None: The radio transmits when the PTT is pressed, even
when there is traffic on the channel.
Busy: The radio does not transmit when the PTT is
pressed if there is activity on the channel, whether it is valid or
Mute: The radio does not transmit when the PTT is
pressed if there is activity on the channel and the mute is active.
This could be caused by an invalid CTCSS/DCS code or an active Selcall
mute. If monitor has been activated, the radio transmits regardless of
valid or invalid activity.
Selcall call initiation (via the press of the auxiliary key, call key
or a function key) follows the conditions set in Tx Inhibit.
Repeater Talk Around
radios only. When the Repeater Talk Around field is checked, a long
press of the channel key activates repeater talkaround. Repeater
talkaround allows the radio user to bypass repeater operation and so
communicate directly with other radios. While repeater talkaround is
active, all transmissions are made on the receive frequency programmed
for the channel.
available for the T2010
Fast PTT via AUX Line
radios only. When the Fast PTT via AUX Line field is checked, and the
PTT is wired to the AUX line on the options connector, the AUX output
line is used as the
input line. This results in more frequent polling, and faster PTT for
Setting Up Channels and Scan Groups
This section contains detailed
information on setting up channels and scan groups.
main settings for channels are set up in the Channels form. The
Channels form for T2010/T2015 radios is shown below.
The channel can be cut and pasted to
and from Micro Soft Excel spreadsheet and the channel form.
Click on the upper left cell in the
channel form to copy or past all entries in the form.
Channels form contains default values for one channel. Select the Add
button to add a new channel, select the Delete button to delete the
currently selected channel, or select the Repeat button to duplicate
the current channels settings, except for the Channel ID and Channel
must be at least one channel in the list. The number of channels
permitted depends on the radio model, as follows:
·T2010: up to 24 channels
·T2015: up to 24 channels
·T2020: up to 100 channels
·T2020 firmware version 7.01 or higher: up to 1200
channel ID field sets the channel number, which cannot be shared by
any other channel or scan group.
·For T2010 radios, set up to 24 channel identities,
between 1 and 24.
·For T2015 radios, set up to 24 channel identities,
between 1 and 24.
·For T2020 radios, set up to 100 channel identities,
between 1 and 255.
·For T2020 radios (firmware version 7.01 or higher), set
up to 1200 channel identities, between 1 and 4999.
T2020 radios only. The Channel Name
field sets the name which is appears in the control head display on
T2020 radios when the radio is in channel mode. The radio enters
channel entry or channel select mode when the radio channel key is
a name of up to 8 characters, chosen from A to Z 0 to 9 * + - <
> / \ space.
default name is generated from the channel identity. For example, the
first channel defaults to CHAN1.
Rx and Tx Frequencies
Rx Freq field sets the receive frequency (in MHz) for the channel, and
the Tx Freq field sets the transmit frequency (in MHz). For each
channel, enter a frequency within the radio’s frequency band that is
a multiple of 5 kHz or 6.25kHz.
minimum channel spacing is dependant on the radio band and IF
bandwidth. The letter in the sixth position in the radio part number
(first after the hyphen) indicates the radio’s frequency band, as
outlined in the table below.
BandReceive Frequency (MHz)Transmit Frequency (MHz)
0 500-530 MHz 500-530
1 220-270 MHz 220-270
2 66-88 MHz 66-88
3 136-174 MHz 136-174
4 175-225 MHz 175-225
5 400-470 MHz 400-470
6 450-520 MHz 450-520
7 330-366 MHz 330-366
8 800-870 MHz 800-870
9 360-400 MHz 360-400
Rx and Tx
Rx Sig field sets the sub-audible signalling the radio must receive
before the activity is regarded as valid and the mute opened. The Tx
Sig field sets the sub-audible signalling that accompanies each
transmission made on the channel.
both fields, select the required frequency from the drop-down list.
Both fields must be either CTCSS (tones starting with C) or DCS (tones
starting with D). Leave these fields set to None if no sub-audible
signalling is used on the channel.
Tx Call field provides a list of transmit Selcall sequence identities.
These are identities that have been defined in the Tx
Call Identity field (Selcall
Sequences tab). Select the transmit call identity required from the
drop-down list. To disable Selcall on the channel, select None.
Repeater field provides a list of Selcall repeater sequence
identities. These are identities that have been defined in the Repeater
Identity field (Selcall Sequences
tab). Select the repeater identity required from the drop-down list.
To transmit no repeater sequence on the channel, select None.
Power field sets the transmit power level. Select a power level
setting of Off, Low High or Max (maximum - T2020 radios only), within
the limits permitted for the region in which the radio operates.
radios only The Bandwidth field sets the transmitter deviation and the
receiver audio sensitivity for systems using different channel
spacing. Select either Narrow (narrowband) or Wide (wideband) for each
radios only. Select Yes for the channel to be included in the scan
operation. While scanning, the radio cycles through all the included
channels until it detects valid activity. When activity is detected,
the radio stops on that channel until the activity stops, then waits
for the time set in the Scan Hold
Time field before returning to scan
Enhanced Scanning (Specifications
form) is checked for T2015 radios, then two additional options are
available, Pri and Sec. Both options add the channel to the scan list,
'Pri' specifies that the channel is the primary priority scan channel
and 'Sec' specifies that the channel is the secondary priority scan
channel. Scan types in the Enhanced
Scan Form will take precedence over
these settings, unless the radio is switched on while the PTT is
radios only. When the BCD Channel Selection field is checked, it is
possible to select the radio channel using the internal BCD channel
select lines. In this case, the control head channel keys are
radios only. When the BCD Polarity field is checked, a high voltage
input is considered to be a ’0’ and a low voltage input is
considered to be a ’1’. Off Hook
radios only. When the Off Hook Scanning field is checked, scanning is
possible when the
is open. Scan Hold Time T2010/T2015 radios only.
Scan Hold Time field determines how long the radio remains on a
channel after valid activity finishes, before scanning is resumed.
Enter a time between 0 and 15 seconds in steps of 1 second.
Caution: To carry out alignment it is necessary
to remove only the top cover (1) and logic PCB retaining screws (3).
It is essential that the bottom cover (13) and microprocessor shield
(5) with its three retaining screws (4) are torqued down as specified
in Figure 3.3.
Caution: Various electronic components within
the radio can be damaged by electrostatic discharge. A properly
grounded earth mat and wrist strap should always be used (refer to