ADInstruments DTVLINK-T2 User manual

O
Op pe er ra at ti io on n M Ma an nu ua al l
D
DT TV VL LI IN NK K- -T T2 2 D DV VB B- -T T2 2 S Si ig gn na al l A An na al ly ys si is s M Me et te er r
V
Ve er r： ：1 1. .2 20 0

© AD INSTRUMENTS
AD INSTRUMENTS Part No.: DTVLINK-T2
All rights reserved.

I
Warranty
The instrument is warranted for 12 months under
normal operating conditions (except batteries and
LCD). Users should read manual carefully before first
use and operate correctly according to the manual.
AD INSTRUMENTS shall have no responsibility for any
defect or damage caused by improper use and
maintenance or for any product which has been
repaired or altered by any one others not AD
INSTRUMENTS or our authorized service center.
When the meter need to be repaired or calibrated,
Please contact AD INSTRUMENTS or our local
distributors in your territory.

II
INDEX
1. General Introduction.............................................1
1.1 Channel Measurement ····································· 3
1.2 Constellation Diagram ······································ 3
1.3 Tilt/Level List ···················································· 3
1.4 Hum Measurement ·········································· 4
1.5 Channel Scanning ············································· 4
1.6 Spectrum Scanning··········································· 4
1.7 Limit Measurement ·········································· 4
1.8 Voltage Measurement ······································ 5
1.9 MER Versus Carriers¡Error! Marcador no
definido.
1.10 ECHOES············· ¡Error! Marcador no definido.
1.11 Multiple User Channel···································· 5
1.12 File Management ··········································· 5
1.13 Intelligent Power Management ······················ 5
1.14 DVB-C channel measurement························· 6
1.15 BER Statistics ·················································· 6
2. Introduction..........................................................7
2.1 Appearance ······················································ 7
2.2 Keypad······························································ 8
2.2.1 Soft keys···················································· 8
2.2.2 Shortcut keys············································· 8
2.2.3 Character/Digit Input ································ 8
2.3 Display Description········································· 10

III
3. Using the Instrument ..........................................11
3.1 Function Menu Display··································· 11
3.2 Learn User Channel Plan································· 13
3.3 Level Measurement ·········································17
3.3.1 Analogue channel measurement ············ 20
3.3.2 Digital channel measurement ················· 24
3.3.3 Limit Display············································ 28
3.4 Constellation Diagram ···································· 29
3.5 BER Statistics Measurement ··························· 36
3.5.1 Parameter Description ·····························37
3.5.2 Soft Keys Operations································37
3.6 MER Versus Carriers ······································· 38
3.6.1 Soft Keys Operation¡Error! Marcador no
definido.
3.7 ECHOES··············· ¡Error! Marcador no definido.
3.8 Spectrum Scanning········································· 39
3.8.1 Soft Keys Operation ································ 40
3.8.2 Parameter Setting ··································· 41
3.9 Tilt/Level List Measurement··························· 45
3.9.1 Tilt Graph Mode·······································47
3.9.2 Tilt List Mode·········································· 48
3.10 Channel Scanning ········································· 50
3.10.1 Soft Keys Operation ······························ 51
3.11 HUM Measurement······································ 54
3.11.1 Soft Keys Operation ······························ 55
3.12 Limit Measurement ······································ 56
3.12.1 Test Results List ······································57

IV
3.12.2 Limit Edit··············································· 59
3.13 Return Path Spectrum ·································· 61
3.14 File Management ··········································62
3.14.1 File Directory ·········································62
3.14.2 Save File················································ 63
3.14.3 Read File ··············································· 65
3.14.4 Delete File··············································70
4. Setup ..................................................................71
4.1 Brief Introduction ··········································· 71
4.2 INFORMATION ················································ 73
4.3 GENERAL··························································74
4.3.1 Shutdown Time········································74
4.3.2 Language Selection ··································74
4.3.3 Date and Time ········································ 75
4.3.4 Files Status···············································76
4.3.5 Option····················································· 77
4.3.5.1 Enable Optional Function······················78
4.3.5.2 Disable Optional Function···················· 80
4.4 Measurement Parameter Setup ····················· 82
4.4.1 Level Unit ················································ 82
4.4.2 Level Calibrate········································· 82
4.4.3 Limit Setup·············································· 83
4.4.4 Auto Diagnosis ·········································87
4.4.5 Voltage and temperature························ 88
4.4.5.1 Battery Voltage ···································· 88
4.4.5.2 Trunk Voltage(AC LINE) ························ 89

V
4.4.5.3 Temperature Inside ······························ 89
4.5 Channel Plan··················································· 91
4.5.1 Select User Plan ······································ 91
4.5.2 Channel Number Type ·····························92
4.5.3 Learn User Plan ········································92
4.5.4 Edit User Plan·········································· 93
5. Power Supply......................................................95
5.1 Battery···························································· 95
5.2 Charging ························································· 96
6. Port ....................................................................97
7. Specification .......................................................98
8. Standard Accessories ........................................103

DTVLINK-T2 Operation Manual
1
1. General Introduction
DTVLINK-T2 is an ideal meter for DVB-T/T2 and DVB-C
signals testing, which is a new model with color screen
and high performance. It demodulates and accurately
measure the COFDM signals carried through the
terrestrial TV system. Also it supports main function of
CATV system measurement, including digital TV and
analog TV. This model can measure and display most
indexes of Digital TV (Channel Power, MER, BER,
Constellation Diagram); Analog TV(Single-frequency
Level, Carrier Level of Full Channels Spectrum, HUM).
Also DTVLINK-T2 can measure Frequency Spectrum
Scanning, Trunk Voltage and Battery Voltage.
DTVLINK-T2 has RS-232 port for communicating with
PC software –TOOLBOX which can manage and
analyze the testing result file.
Configuration:
DTVLINK-T2
Standard
DVB-T
Option included
DVB-C
DVB-T2

DTVLINK-T2 Operation Manual
2
Features:
* QAM and QPSK Test
* Level Test
* Constellation Diagram
* Channel Scanning
* Spectrum Scanning
* Tilt Test
* Limit Test
* HUM
* Voltage Measurement
* Multiple User Channel Plan Setup
* File Management
* Multi languages support
* BER Statistics

DTVLINK-T2 Operation Manual
3
Basic Functions Overview
1.1 Channel Measurement
DTVLINK-T2 supports accurate signal level test in
analogue TV, DVB-T/T2 signals and single frequency
modes.
For Analogue channels, you can get video level, audio
level and △V/A etc.
For DVB-T channels, DTVLINK-T2 supports modulation
modes of QAM and QPSK. Here, you can get Channel
Power, MER and BER and Constellation Diagram.
NOTE: For DVB-T channels, MER and BER test is only in
QPSK and QAM(16/64QAM) Modulation Mode.
1.2 Constellation Diagram
For DVB-T channels, Constellation diagram function
supports modulation modes of 16QAM ,64QAM and
QPSK. Here, you can get Channel Power, MER, CBER,
VBER, CARRIER and Constellation diagram.
1.3 Tilt/Level List
Tilt/Level list test is the effective solution to check the
flatness and amplitude, and DTVLINK-T2 support 12

DTVLINK-T2 Operation Manual
4
channels tilt max.
1.4 Hum Measurement
HUM is also named as power supply hum modulation
distortion, which comes from the low-frequency
interference of power supply.
1.5 Channel Scanning
DTVLINK-T2 supports video and audio level display of
all channels, which could up to 160 channels most.
Also 5 steps zoom in/out and marker function make
your observation easier.
1.6 Spectrum Scanning
DTVLINK-T2 has spectrum function which provides
several spans, and two sample modes (AVG and
PEAK).In order to detect and know the interference, it
has peak-hold function which shows the difference
between peak spectrum and current spectrum by
marker and double-marker function.
1.7 Limit Measurement
DTVLINK-T2 can fast check the cable system by the
limit test function. Each enabled channel will be tested
according to the limits setup by user, and after the

DTVLINK-T2 Operation Manual
5
testing, pass/fail indicator can be viewed.
1.8 Voltage Measurement
DTVLINK-T2 can measure battery voltage, trunk
voltage and identify AC or DC automatically of the
cable system.
1.9 Multiple User Channel
DTVLINK-T2 can create five user channel plans max,
which contains digital channels or analog channels or
mixed channels. Also they can be switched easily. So it
is very suitable for multi-network maintenance.
1.10 File Management
DTVLINK-T2 can store the results of channel level test,
constellation test, tilt test, channel scanning, spectrum
scanning and HUM test for analogue TV channel. User
can manage and analyze these files via meter or PC.
1.11 Intelligent Power Management
DTVLINK-T2 with full charged is able to work over 5
hours. The power supply monitoring system will
monitor the status of power and ensure the
instrument in power saving mode.

DTVLINK-T2 Operation Manual
6
NOTE: Charge the battery before first use. Refer to 5.2
1.12 DVB-C channel measurement
DTVLINK-T2 supports accurate signal level test in
DVB-C signals mode.
For DVB-C channels, DTVLINK-T2 supports modulation
mode of QAM. Here, you can get Channel Power, MER
and BER and Constellation Diagram.
NOTE:For DVB-C channels, MER and BER test is only in
QAM(16/32/64/128/256QAM) Modulation Mode.
1.13 BER Statistics
For DVB-C channels, you can get MER, BER, ES, SES,
COR, UNCOR and etc…
1.14 DVB-T2 channel measurement
DTVLINK-T2 supports accurate signal level test in
DVB-T2 signals mode.
For DVB-T2 channels, DTVLINK-T2 supports
modulation mode of QAM. Here, you can get Channel
Power, MER and BER and Constellation Diagram.

DTVLINK-T2 Operation Manual
7
2. Introduction
2.1 Appearance
Get acquainted with the appearance before use：
Serial
Port
RF Interface
LCD
Keyboard
Charge Status
POWER
Charge
Interface

DTVLINK-T2 Operation Manual
8
2.2 Keypad
2.2.1 Soft keys
There are three soft keys ( , and )
located under the screen. They are used to access the
functions represented by the icons displayed on the
bottom of screen.
2.2.2 Shortcut keys
There are three keys below the three soft keys
including , , .
Press key can directly back to menu screen.
and key is used as different functions in
different screen.
2.2.3 Character/Digit Input
Entering Numeric Values:
Within several displays, you must enter numeric
values. Here, press the number buttons to enter the
desired value directly. Then press ENTER( ) key to
enter the value into the DTVLINK-T2.

DTVLINK-T2 Operation Manual
9
Entering Alphanumeric Characters:
Similarly, you must enter alphanumeric data on
several screens, such as file names, Channel labels and
the password of DVB-C option. As before, you press
the buttons to enter the desired value directly. When
you press a button, the first entry is the number
associated with the button, after which you press the
same button repeatedly to scroll through the letters
associated with the button. To enter a second letter or
number using a different button, you can go directly
to the second button for entry. If you want to enter a
second letter or number using the same button as the
preceding character, you must press the key to
shift the DTVLINK-T2 control to a new number or
letter.
NOTE: If you make an error when entering a number
or a name, you can press BACK( ) key to go back
and then re-enter it. Press ESC( ) key to escape
from the operation.

DTVLINK-T2 Operation Manual
10
2.3 Display Description

DTVLINK-T2 Operation Manual
11
3. Using the Instrument
3.1 Function Menu Display
Figure3-1-1
The Figure 3-1-1 Display the Main Menu which include all
of the function icons.
Soft Keys:
: Enter the selected shortcut interface.
: Switch the selected shortcut on the left
direction circularly.
: Switch the selected shortcut on the right
direction circularly.

DTVLINK-T2 Operation Manual
12
Function keys:
: Switch the selected shortcut on the up direction
circularly.
: Switch the selected shortcut on the down
direction circularly.
The selected shortcut will displays in highlight.