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T3000 Series
Calibration Software
User’s Guide

439-37100-00

About This Guide

About This Guide
Welcome to the T3000 calibration software user’s guide. The calibration software allows the user to electronically tune and individually configure T3000 series handportable radios.

Overview
This guide covers the T3000 series calibration software, and
explains how to install and use this software. It is structured in 3
chapters, with the Tait Software Licence agreement at the end.

Chapter 1: Getting Started
Introduces the software, and gives software installation and test
equipment set-up instructions.

Chapter 2: General Operations
Explains how use the calibration software.

Chapter 3: Calibration Procedures
Gives detailed instructions on how to perform each calibration
test.

Typographical Conventions
This guide uses the following typographical conventions:
Convention

Description

Bold

Menu Bar commands
Menu names and options
Field Names
Button names in dialogue boxes
Indicates commands to be entered by the user
via the keyboard
Keyboard keys e.g. CTRL, ENTER

Monospace font
ALL CAPITALS

439-37100-00

About This Guide

Related Documents
M3000-00-10X

T3000 Series Service Manual

M3000-00-20X

T3000 Series II Service Manual

T3000-5000-00X

T3000 Programming Software Users’ Guide
(IPN 439-35000-0X)

439-37100-00

About This Guide

iii

Contents
About This Guide
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
Typographical Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Chapter 1 Getting Started
About This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hardware Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibration Kit Components . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing The Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting The Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
1-1
1-2
1-2
1-3
1-3
1-5
1-6

Chapter 2 General Operations
Starting The Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using The Menu Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Saving Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programming The Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using The Utility Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exiting The Program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1
2-2
2-3
2-3
2-4
2-5
2-6
2-8

Chapter 3 Calibration Procedures
Reading The Radio Identity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Full Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
TCXO Output Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Power Control Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Balance Adjust Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Maximum Deviation Adjustment. . . . . . . . . . . . . . . . . . . . . . . . 3-8
Front End Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

439-37100-00

About This Guide
Maximum Volume Threshold . . . . . . . . . . . . . . . . . . . . . . . . . .
Squelch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RSSI Thresholds (T3030, T3035 & T3040 Radios Only) . . . . .
Battery Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-15
3-16
3-21
3-22

Tait Electronics Limited Software Licence
Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I

439-37100-00

Getting Started

1-1

1 Getting Started
About This Chapter
This chapter covers the following topics:
■ Software Overview
■ Hardware Requirements
■ Calibration Kit Components
■ Test Equipment Required
■ Installing The Software
■ Connecting The Radio

Software Overview
The T3000 radio has been designed to be totally electronically
tuned, with all physical tuning points either eliminated or
replaced with electronic tuning. Calibration of the T3000 is normally only carried out during product manufacture, or after
major service.
The calibration package performs three major tasks:
• measurement - carried out with the radio in computer controlled test mode, with all test equipment operated by the
user
• calculation - the controller processes the data
• programming - the radio is placed in programming mode,
and all data required for the radio’s self-configuration is
written to its database
Note Each radio is calibrated over a predetermined operating
band, and the radio performance is not guaranteed outside of
this band.

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Getting Started

Software Compatibility
Version 2.04 calibration software is compatible with all current
fully approved radio software versions at 26/3/96 that support
the following calibration databases:
T3010
v0.01, v1.01
T3020
v0.03
T303X & T3040 v1.01, v1.02, v1.03
The following frequency bands are covered:
VHF low
136 to 154MHz (-31XX)
VHF high
145 to 174MHz (-32XX)
Band III low
Band III high

174 to 195MHz (-41XX)
184 to 208MHz (-42XX)

UHF low
UHF mid
UHF high

400 to 440MHz (-51XX)
440 to 470MHz (-52XX)
470 to 520MHz (-53XX)

UHF USA mid
UHF USA high

450 to 470MHz (-55XX)
470 to 490MHz (-56XX)

UHF Germany
UHF China
UHF Korea
UHF Russia

410 to 430MHz (-54XX)
336 to 360MHz (-70XX)
360 to 400MHz (-71XX)
300 to 340MHz (-72XX)

UHF 800MHz

806 to 870MHz (-81XX)

Hardware Requirements
While the T3000 calibration software will run on XT, AT, 386, or
486 IBM* compatible PCs, the recommended machine configuration is:
• A 386 or higher PC
• 2MB RAM
• VGA display
• Hard disk with 500kB of free space
Note The calibration software requires a large portion of the
PCs 640K base memory to run reliably. To optimise memory
usage, refer to the MS-DOS user manual.
*

IBM is a registered trademark of International Business
Machines.

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Getting Started

1-3

Calibration Kit Components
The following items are contained in the T3000-7100 calibration
kit:
• Diskette containing the latest calibration software.
• T3000 calibration test unit.
• T3000-7300 radio calibration cable. This connects the calibration test unit to the radio.
• T3000-7600 battery eliminator.
• X3000-19 programming lead. This connects the calibration
test unit to a COM port of the PC.
• T3000-7400 RF test lead. This provides an RF connection
from the radio to test instruments and can be used with the
radio open. One end is fitted with a BNC plug and the other
end has a modified N-type plug.
• T3000-7500 open radio control lead. This enables connection
to the T3000 calibration test unit when the radio is open. One
end is fitted with a modified accessory connector and the
other end has a 15 way socket.
Note A calibration software upgrade package is also available
under the product code T3000-7200-002. This contains a diskette
with the latest calibration software and the T3000 Calibration
Software User’s Guide.

Test Equipment Required
The following list specifies the general performance requirements of test equipment used in the calibration process.
• Power supply providing +7.2V, with a 3A capacity.
• Sinad meter: accurate to ±1dB sinad at a reading of 12dB
sinad.
• Audio signal generator: 600Ω output, output frequency variable from 50Hz to >10kHz, with a flat frequency response.
Output level variable, with both a continuous adjustment
and a 10dB step adjustment. Full output is >3Vp-p into a
600Ω load.
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Getting Started
• RF signal generator: capable of producing an internally modulated RF signal in the range of 100 to 520MHz with an output impedance of 50Ω and a frequency error of <2ppm.
Output level can be varied over the range of 0dBm to
-127dBm and must be accurate to within 2dB.
• Frequency counter: an oven controlled reference is preferred,
however a TCXO reference with temperature stability of
5ppm (0ºC to 50ºC) will suffice.
• Power meter: this must be accurate to ±10% FSD.
• Modulation meter: this must be accurate to ±10% FSD. A
demodulated audio output should also be available. Low
pass filtering must be >15kHz and high pass filtering must
be < 20Hz.
• 20MHz dual trace oscilloscope.
• 20dB RF power attenuator, 50Ω.. Must be accurate to within
1dB and capable of handling 10W input power.
• Digital multimeter - 3½ digit.
A multifunction test set may be used as long as it has the appropriate function to perform the calibration correctly e.g. Rhode &
Schwarz CMS52 Radio Communications Test Set, with a high
stability oscillator.
Note These test equipment performance requirements are satisfactory for servicing, but are not adequate for verifying the
accuracy of the Factory Test Report that accompanies each new
T3000.

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Getting Started

1-5

Installing The Software
Copy all the files on the 3.5" diskette to the working directory on
the hard disk e.g. copy a:*.* c:\calib, then press ENTER (↵).

Creating A Windows* Desktop Icon
In the windows Program Manager select the Program Group in
which you wish to place the calibration software icon.
Select the New command from the File menu.
Select Program Item then choose the OK button.
In the Program Item Properties dialogue box, enter the following information:
Description:
Command Line:
Working Directory:

Calib v2.04
[drive/directory path]\calib.exe
[drive/directory path that you want data
files to be saved in]

Select Change Icon, then change the directory path to the one
that holds the calib.ico file.
e.g. c:\calib\calib204.ico
The icon provided allows you to visually identify the icon representing the calibration software. When this icon is selected,
choose the OK button.
In the Program Item dialogue box choose OK to create the new
item on your desktop. To change the group in which it appears,
click and drag it to the required group.
*

Windows is a trademark of the Microsoft Corporation.

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Getting Started

Connecting The Radio
The following diagram shows how to set up the test equipment.
RECEIVER TEST SET-UP
SIGNAL
GENERATOR

BATTERY
ELIMINATOR

OSCILLOSCOPE

20dB
PAD

SINAD
METER

AUDIO
mV METER

CALIBRATION
CABLE

T3000

CALIBRATION
TEST UNIT

PSU
+7.2V

PROGRAMMING
LEAD
PC
COMMS
PORT

TRANSMITTER TEST SET-UP
OSCILLOSCOPE
RF POWER
METER
BATTERY
ELIMINATOR

MOD
METER

CALIBRATION
CABLE

20dB
PAD

T3000

CALIBRATION
TEST UNIT
PSU
+7.2V
PROGRAMMING
LEAD
PC
COMMS
PORT

439-37100-00

FREQUENCY
COUNTER

AUDIO
GENERATOR

General Operations

2-1

2 General Operations
This chapter covers the following topics:
■ Starting The Program
■ Navigation
■ Using The Menu Bar
■ Loading Files
■ Saving Files
■ Programming The Radio
■ Using the Utilities Menu
■ Exiting The Program

Starting The Program
Connect the test equipment, as shown in Chapter 1.
Connect the battery eliminator and radio calibration cable to the
T3000 and switch on the radio.
On the PC, change to the directory in which the calibration software was installed, and type calib to run the calibration program.
If the calibration software has been installed under Windows,
click on the appropriate Windows desktop icon.
The calibration software runs in graphics mode by default. To
run in text mode, type:
calib /t
Note Running in text mode will not normally provide significant performance enhancement.

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2-2

General Operations

Navigation
The calibration software can be used either with a mouse or keyboard. The following keyboard commands are common to all
calibration software windows or menus.
Key

Function

Help

Exit window & return to main menu

Quit program without saving

Refresh screen

ALT

Go to menu bar

ENTER (↵)

Selects the current DAC setting as the
data value for the current test, and will
then move on to the next window object
or test

TAB

Move to next window object

SHIFT-TAB

Move to previous window object

↑↓

Move up and down DAC adjustment
range in single steps

→←

Change to next data input field, or move
along menu items, without saving the
current DAC settings

PAGEUP

Move to top of DAC adjustment screen

PAGEDOWN

Move to bottom of DAC adjustment
screen

HOME

Go to top of DAC adjustment range

END

Go to bottom of DAC adjustment range

In the program windows, the following convention applies:
Exit the window without saving the data
Exit the window and save the data

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General Operations

2-3

Using The Menu Bar
The key words on the main menu bar are selected either by
clicking on them with the mouse or by holding down the ALT
key and pressing the underlined letter.
To access on-line help while either in the main menu or in a window, press F1. Help is context sensitive and the information
given will relate to the window active when the F1 key was
pressed.

Loading Files
Only calibration data from a radio with the same radio identity
can be used to calibrate another radio.
Select File from the main menu then Load and the file will be
loaded from the current directory. The following window
appears:

Enter the appropriate file name and press ENTER (↵).
Choose the LOADED button to exit the window.

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2-4

General Operations

Saving Files
Once calibration is completed, it is possible to save the calibration data. This will be saved to the current directory.
In the main menu, select File then Save (or Save As).
The following window appears:

Enter the file name and press ENTER (↵).
Choose the SAVED button to exit the window.

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General Operations

2-5

Programming The Radio
After completing either full calibration or individual tests, it is
necessary to enter the calibration data in the radio’s database.
Select Program Database from the Radio menu and the following window appears:

When the window opens, the OK button is highlighted. Press
ENTER (↵) to select OK button and the calibration data is
entered into the radio’s database.
To exit this window without programming the database, choose
the CANCEL button without first selecting OK.

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2-6

General Operations

Using The Utility Menu
Select Utility from the main menu, and the following window
appears:

Printing
Choose Print from the Utility menu and the following window
appears:

Choose the Print button and radio information and test data
will be printed.
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General Operations

2-7

Configuration
Choose Configuration from the Utility menu and the following
window appears:

This menu allows the COM port connection details to be
changed.

Test Commands
Choose Test Commands from the Utilities menu and the following window appears:

439-37100-00

2-8

General Operations
Select a test command and press ENTER (↵).
If either user mode or program mode is required, click on the
Test Mode button to select either Test Mode, User Mode or
PGM Mode.
For commands 110 to 119, the value in the Setting window (0 to
255) will be sent to the appropriate control element. After changing the setting value, the desired command must be resent for it
to take effect.
For details on the test facilities available, refer to Section 5.2
“Test Facilities” of the M3000-00 Service Manual.

Exiting The Program
From the main menu select Quit. Click on OK to exit the program or CANCEL to return to the main menu.
Selecting F4 at any time will also exit you from the calibration
program.

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Calibration Procedures

3-1

3 Calibration Procedures
This chapter covers the following topics:
■ Reading The Radio Identity
■ Full Calibration
■ TCXO Output Frequency
■ Power Control Test
■ Balance Adjust Test
■ Maximum Deviation Adjustment
■ Front End Tuning
■ Maximum Volume Threshold
■ Squelch
■ RSSI Thresholds (T3030, T3035 & T3040 Radios Only)
■ Battery Thresholds

Reading The Radio Identity
Press ALT then select Radio from the main menu, and the following window appears:

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3-2

Calibration Procedures
Select Read Radio Identity, and the following window appears:

Enter the last 4 characters of the 8 character T-code. This is
found on the radio identity label on the rear cover of the radio.
Press ENTER (↵), and the information on the screen is then
updated.
Note The first 4 digits of the radio identity are programmed
using T3000 programming software. This must be programmed
prior to calibration.
Click on the Signalling button and select either CTCSS (T3030,
T3035 and T3040 only), Selcall or No (none).
Choose the OK button to exit to the main menu.

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Calibration Procedures

3-3

Full Calibration
From the main menu, select Test and the following window
appears:

Select Full Calibration from the Test menu.
The program will now step the user through the calibration tests
automatically, displaying commands on the screen at the beginning of each test. If a full calibration is not required, individual
parameters may be selected for calibration and test in the Test
menu.
The Program Database window will appear automatically at
the completion of a full calibration.
Note After full calibration or when individual tests have been
carried out, it is necessary to enter the new data into the radio’s
database to complete the calibration or test procedure (refer to
“Program Database”). The Program Database window will only
appear automatically at the completion of a full calibration.

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3-4

Calibration Procedures

TCXO Output Frequency
The T3000 is a synthesised radio, phase locked to a high stability
TCXO. The TCXO needs careful alignment to ensure that the
transmitter and receiver are on frequency.
Select TCXO Output Frequency from the Test menu and the following window appears:

Connect the RF output of the radio to the frequency counter via
the attenuator.
Adjust the Coarse Trim DAC, while monitoring the frequency
counter.
Set the frequency as close as possible to the required frequency
and press ENTER (↵).
On pressing ENTER (↵), Fine Trim is selected. Set the frequency
as accurately as possible, then press ENTER (↵).
Choose the OK button.

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Calibration Procedures

3-5

Power Control Test
The power control must be set for both high and low power at
five points across the frequency band of the radio. This ensures
a flat power output across the operating band.
Select Power Control from the Test menu and the following
window appears:

With the RF output of the radio connected to the power meter,
the radio is set to transmit at each of the five points in the band.
Adjust the power control DAC so that the radio output power is
set as closely as possible to the maximum rated power (5W VHF,
4W UHF and Band III).
Press ENTER (↵) after each setting and repeat this process for
low power setting (1W).
Choose the OK button.
Note It is recommended that the lead to the power meter is
kept as short as possible to achieve best accuracy.

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3-6

Calibration Procedures

Balance Adjust Test
The modulation balance adjustment ensures a flat modulation
response across the frequency band of the radio.
Select Balance Adjustment from the Test menu and the following window appears:

Connect the RF output of the radio to the modulation meter via
the attenuator.
Set the audio generator to 70Hz, set the test unit ‘Tx Audio’
switch to ‘Mod Audio’ and increase the audio generator output
level to give ±2.5kHz deviation.
Increase the audio generator frequency to 7kHz without changing the output level. Adjust the Balance Pot to give ±2.5kHz
deviation and press ENTER (↵).
Reset the audio generator frequency to 70Hz and repeat the previous two steps until the deviation at 70Hz and 7kHz is the
same, then set the audio generator to 7kHz.
On pressing ENTER (↵), the first frequency step is selected. Type
in the deviation reading observed on the modulation meter and
press ENTER (↵).

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Calibration Procedures

3-7

Type in the next 4 deviation readings, pressing ENTER (↵) after
each entry.
Note Using TAB to move to the next entry point will not
change the data.
When all readings have been entered, choose the OK button.

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Calibration Procedures

Maximum Deviation Adjustment
In this Chapter, deviation settings are given first for wide band,
followed by settings for medium band in brackets ( ) and settings for narrow band in square brackets [ ].

T3010 & T3020 Radios - No Selcall
Select Maximum Deviation Adjustment from the Test menu,
and the following window appears:

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Calibration Procedures

3-9

Adjust the Deviation Pot to give ±4.3kHz deviation and press
ENTER (↵).
Set the test unit ‘Tx Audio’ switch to the off position.
To set the signalling deviation, adjust the Deviation Pot to give
±600Hz deviation and press ENTER (↵).
Set the test unit ‘Tx Audio’ switch to ‘Mic Audio’.
Readjust the Deviation Pot for ±4.5kHz (±3.6kHz) [±2.2kHz]
deviation at the frequency of maximum deviation, and press
ENTER (↵).
Choose the OK button.

T3020-XX2X Programmable Bandwidth Radios
There is one additional step in the test procedure, as shown:

Readjust the Deviation Pot for ±2.2kHz deviation at the frequency of maximum deviation, and press ENTER (↵).
Choose the OK button.

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3-10

Calibration Procedures

T3010 & T3020 Radios - With Selcall
Select Maximum Deviation Adjustment from the Test menu,
and the following window appears:

Set the audio generator to 1kHz and set the test unit ‘Tx Audio’
switch to ‘Mic Audio’.
Observe the demodulated waveform on the oscilloscope and
adjust the audio generator level until the peaks of the waveform
just begin to flatten (about 3mV).
Increase the audio level by 20dB and vary the audio generator
frequency between 300Hz and 3kHz to find the frequency of
maximum deviation.
Adjust the Deviation Pot to give ±4.3kHz deviation and press
ENTER (↵).
Set the test unit ‘Tx Audio’ switch to the off position.
To set the signalling deviation, adjust the Deviation Pot to give
±600Hz deviation and press ENTER (↵).

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Calibration Procedures

3-11

Set the test unit ‘Tx Audio’ switch to ‘Mic Audio’.
Readjust the Deviation Pot for ±4.5kHz (±3.6kHz) [±2.2kHz]
deviation at the frequency of maximum deviation, and press
ENTER (↵).
Sweep the frequency band between 300Hz and 3kHz and check
that ±4.5kHz (±3.6kHz) [±2.2kHz] is not exceeded at any frequency.
Choose the OK button.

T3020-XX2X Programmable Bandwidth Radios
There are 2 additional steps in the test procedure, as shown:

Readjust the Deviation Pot for ±2.2kHz deviation at the frequency of maximum deviation, and press ENTER (↵).
Sweep the frequency band between 300Hz and 3kHz and check
that ±2.2kHz is not exceeded at any frequency.
Choose the OK button.

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3-12

Calibration Procedures

T3030, T3035 & T3040 Radios
Select Maximum Deviation Adjustment from the Test menu
and the following window appears:

Set the audio generator to 1kHz and set the test unit ‘Tx Audio’
switch to ‘Mic Audio’.
Observe the demodulated waveform on the oscilloscope and
adjust the audio generator level until the peaks of the waveform
just begin to flatten.
Increase the audio level by 20dB and vary the audio generator
frequency between 300Hz and 3kHz to find the frequency of
maximum deviation.
Adjust the Deviation Pot to give ±4.5kHz (±3.6kHz) [±2.2kHz]
deviation and press ENTER (↵).
Note If CTCSS is enabled, adjust the Deviation Pot to give ±4.3kHz
(±3.5kHz) [±2.1kHz] deviation instead, and press ENTER (↵).
An FFSK tone will then be transmitted.
Adjust the Deviation Pot for ±3.0kHz (±2.4kHz) [±1.5kHz]
deviation at the frequency of maximum deviation, and press
ENTER (↵).
Choose the OK button.
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Calibration Procedures

3-13

Front End Tuning
The T3000 receiver front end is electronically tuned and during
calibration is set to give maximum sensitivity at five points
across the frequency band.
Note The TCXO output frequency must be set accurately
before tuning the front end.
Select Front-End Tuning from the Test menu and the following
window appears.

Connect the RF output of the radio to the RF signal generator
via the attenuator. Connect the ‘Sinad’ audio output on the test
unit to the sinad meter.
Set the signal generator to the required frequency with modulation set for ±3.0kHz (±2.4kHz) [±1.5kHz] deviation at 1kHz AF
and an output level of -100dBm at the radio.
Tune the Rx Tune DAC to achieve an approximately maximum
RSSI reading and press ENTER (↵).
A “warning” window appears while the calibration software
maximises this result. When the window disappears, an asterisk
appears beside the next frequency.

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3-14

Calibration Procedures
Set the signal generator to this frequency and tune the RX Tune
DAC as before.
Repeat these two steps for each successive frequency, and
choose the OK button.
Note If the data input for R1 or R2 is incorrect, the R0 data (calculated from R1 and R2) will be invalid, and an error message
appears. It will then be necessary to reset the R1 and R2 values.

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Calibration Procedures

3-15

Maximum Volume Threshold
The maximum volume threshold is set to ensure that the T3000
speaker is not overdriven (no audible distortion).
Select Maximum Volume Threshold from the Test menu and
the following window appears:

Connect the RF output of the radio to the RF signal generator
via the attenuator and connect the ‘Sinad’ audio output on the
test unit to the oscilloscope.
Set the signal generator to the frequency shown in the test window, with modulation set for ±3.0kHz (±2.4kHz) [±1.5kHz]
deviation at 1kHz AF and an RF level of -47dBm at the radio.
Adjust the Volume Pot to give 5.7Vp-p on the oscilloscope and
press ENTER (↵).
Choose the OK button.

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3-16

Calibration Procedures

Squelch
There are 2 programmable squelch settings for T3010 and T3020
radios. These are 'country' and 'city' squelch, and correspond to
nominal settings of 10dB and 16dB sinad respectively.

T3010 & T3020 Non Programmable Bandwidth Radios
Country Squelch
Select Country Squelch Setting from the Test menu and the following window appears:

Calibration Procedures

3-17

City Squelch
Select City Squelch Setting from the Test menu and the following window appears:

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3-18

Calibration Procedures

T3020-XX2X Programmable Bandwidth Radios
Country Squelch
Select Country Squelch Setting from the Test menu and the following window appears:

Connect the RF output of the radio to the RF signal generator
via the attenuator. Connect the ‘Sinad’ audio output on the test
unit to the sinad meter.
Set the signal generator to the frequency shown in the test window, with modulation set for ±3.0kHz deviation at 1kHz AF and
an output level to give a 10dB sinad.
Increase the Squelch Level DAC until the Busy status is ‘0’.
Decrease the squelch setting until the Busy status changes from
‘0’ to ‘1’, then press ENTER (↵).
Repeat 3 more times, then press ENTER (↵).
Set the signal generator modulation to ±1.5kHz deviation at
1kHz AF, adjust the output level to give a 10dB sinad.
Decrease the squelch setting until the Busy status changes from
‘0’ to ‘1’, then press ENTER (↵).
Repeat 3 more times, and choose the OK button.
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Calibration Procedures

3-19

City Squelch
Select City Squelch Setting from the Test menu and the following window appears:

Connect the RF output of the radio to the RF signal generator
via the attenuator. Connect the ‘Sinad’ audio output on the test
unit to the sinad meter.
Set the signal generator to the frequency shown in the test window, with modulation set for ±3.0kHz deviation at 1kHz AF and
an output level to give a 16dB sinad.
Increase the Squelch Level DAC until the Busy status is ‘0’.
Decrease the squelch setting until the Busy value changes from
‘0’ to ‘1’, then press ENTER (↵).
Repeat 3 more times, then press ENTER (↵).
Set the signal generator modulation to ±1.5kHz deviation at
1kHz AF, adjust the output level to give a 16dB sinad.
Decrease the squelch setting until the Busy value changes from
‘0’ to ‘1’, then press ENTER (↵).
Repeat 3 more times, and choose the OK button.

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3-20

Calibration Procedures

T3030, T3035 & T3040 Radios
Select Country Squelch Setting from the Test menu and the following window appears:

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Calibration Procedures

3-21

RSSI Thresholds (T3030, T3035 & T3040
Radios Only)
Select RSSI Thresholds from the Test menu and the following
window appears:

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3-22

Calibration Procedures

Battery Thresholds
This test allows the radio to recognise the battery levels at which
transmit or receive operation is marginal. These levels are used
to give the ‘battery low power’ and ‘off power’ warnings.
Select Battery Thresholds from the Test menu and the following
window appears:

Adjust the power supply to give between 6 and 9V (normal battery voltage is 7.2V).
Using the digital multimeter, measure the power supply output
voltage to 2 decimal places.
Type in the measured voltage and press ENTER (↵). The Rx Low
Power, Tx Low Power and Off Power threshold levels are now
automatically updated.
Choose the OK button.

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