ADInstruments DTVLINK-T, DTVLINK-T2 Operation Manual

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ADInstruments DTVLINK-T, DTVLINK-T2 Operation Manual | Manualzz

O p e r r a t t i i o n M a n u a l l

D T V L L I I N K T 2 D V B T 2 S i i g n a l l A n a l l y s s i i s s M e t t e r r

V e r r : 1 .

.

2 0

© AD INSTRUMENTS

AD INSTRUMENTS Part No.: DTVLINK-T2

All rights reserved.

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.

I

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

II

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

III

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

IV

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

V

DTVLINK-T2 Operation Manual

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

Option included

DVB-T

DVB-C

DVB-T2

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DTVLINK-T2 Operation Manual

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

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DTVLINK-T2 Operation Manual

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

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DTVLINK-T2 Operation Manual 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

4

DTVLINK-T2 Operation Manual 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.

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DTVLINK-T2 Operation Manual

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.

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DTVLINK-T2 Operation Manual

2. Introduction

2.1 Appearance

Get acquainted with the appearance before use :

RF Interface

LCD

POWER

Serial

Port

Charge

Interface

Keyboard

Charge Status

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DTVLINK-T2 Operation Manual

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.

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DTVLINK-T2 Operation Manual

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.

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DTVLINK-T2 Operation Manual

2.3 Display Description

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DTVLINK-T2 Operation Manual

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.

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DTVLINK-T2 Operation Manual

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.

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DTVLINK-T2 Operation Manual

3.2 Learn User Channel Plan

In order to enhance your work efficiency, please create user channel plan before measurement.

DTVLINK-T2 will choose all effective channels in the cable system automatically and save in this channel plan.

The User Channel Plan includes three elements as follows:

* Channel number

* Channel format (TV, DIGI)

* Carriers frequency (video and audio)

The following is the step of setup user channel plan.

1 . Connect the instrument with the cable system or signal receiving antenna.

2 . Press return to main menu, and select the

Setup shortcut like Figure3-2-1, then press into Setup Menu.

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DTVLINK-T2 Operation Manual

Figure3-2-1

Then press the or

CHANNEL PLAN item, as Figure3-2-2.

select the

14

Figure3-2-2

Now press

PLAN, then press plan.

into Figure3-2-3 CHANNEL

select the user channel

DTVLINK-T2 Operation Manual

Figure3-2-3

3.

Press or to select the LEARN

CHANNEL PLAN item, and press , the

LEARN CHANNEL PLAN function displays as

Figure 3-2-4.

Press

Figure3-2-4

to select one channel type.

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DTVLINK-T2 Operation Manual

4.

Press or into Parameter setting, you can define the channel plan as Analogue channel plan, digital channel plan or analog/digital mixed channel plan. Also you can edit “Bandwidth,

Modulation type, Symbol Rate” in digital channel plan. When your setup is completed, please press

or to START, then press to creat your user channel plan. For a while, new user plan will be saved automatically.

NOTE: The analog channels with level higher than

45dBμV and digital channel with power level higher than 32dBμV will be enabled in standard channel plan.

Only the enabled channels will be displayed in each measurement interface. After setup your user channel plan, you can also enable or disable channels.

When the learning the channel plan, please keep the power on and don’t interrupt the process, otherwise it will create a wrong channel plan.

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DTVLINK-T2 Operation Manual

3.3 Level Measurement

Press return to main menu, press the or

to select the LEVEL shortcut as Figure3-3-1.Then press .

Figure3-3-1

17

DTVLINK-T2 Operation Manual

If there is no valid channel to test, the screen will display as figure 3-3-2. Now, if you want to do any test in this function, you have to create a valid channel with press .

Figure3-3-2

The channel list will display as figure 3-3-3. Press or to select the channel, and here, Press or

Then press

3-3-4.

will page up or page down the channel list.

into channel information as figure

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DTVLINK-T2 Operation Manual

Figure 3-3-3

Figure 3-3-4

Press or to select the channel parameters, if the selected parameter could be changed, press to change. As the figure 3-3-4, ensuring the STATUS is enable, the channel will be enabled.

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DTVLINK-T2 Operation Manual

3.3.1 Analogue channel measurement

If the current channel is a valid analogue channel, The

Level function will display as Figure3-3-5, three test results are displayed in the screen, include Video, audio and V/A.

: Video Level

: Audio Level

Figure3-3-5

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DTVLINK-T2 Operation Manual

CH INFO ( ): Press this button will display the channel information of this analogue channel as figure

3-3-6. The channel parameters also can be modified in this screen.

Figure 3-3-6

ONE CHN/ADJ CHN ( ): The user can switch display mode between One Channel and ADJ Channel.

One Channel Mode: The histogram shows the video and audio of current channel only, as figure 3-3-5

ADJ Channel Mode: The histogram shows the video and audio of current channel, and also show the level of two adjacent channels with gray color, if the adjacent channels are valid. Refer to figure 3-3-7.

21

DTVLINK-T2 Operation Manual

Figure 3-3-7

and is used for switch channels circularly.

If the next channel is digital channel, the screen will be changed. (Refer to

chapter

3.3.2.)

( ): Press this button to next page as figure 3-3-8, the user can press this button again to return.

22

Figure 3-3-8

DTVLINK-T2 Operation Manual

FREQ( ): Press this button to show single frequency measurement interface as figure 3-3-9, the user can modify the frequency, press this button again to return. and frequency circularly.

is used for switch

SAVE( ): Press this button to save the result of level test.

Figure 3-3-9

REFRESH( ): Press this button can test again.

23

DTVLINK-T2 Operation Manual

3.3.2 Digital channel measurement

DTVLINK-T2 is able to measure POWER, MER and BER.

As figure 3-3-10.

Figure3-3-10

CH INFO ( ): Press this button will display the channel information of the current channel, as figure

3-3-11. The channel parameters also can be modified in this screen.

24

DTVLINK-T2 Operation Manual

Figure 3-3-11

ONE CHN/ADJ CHN ( ): The user can switch display mode between One channel and ADJ channel.

One channel mode: The histogram shows the Power of current channel only.

ADJ channel mode: The histogram shows the Power of current channel, and also show the Power of two adjacent channels with gray color ,if the adjacent channels are valid. Refer to figure 3-3-12.

25

DTVLINK-T2 Operation Manual

Figure 3-3-12

( ): Press this button to next page as figure

3-3-13, the user can press this button again to return.

Figure 3-3-13

26

DTVLINK-T2 Operation Manual

and are used for switching channels circularly. If the next channel is analogue channel, the screen will be displayed as figure 3-3-5, and if the next channel is digital channel, the screen will be display as figure 3-3-10.

FREQ( ): Press this button into frequency measurement interface as figure 3-3-14, In this mode, the user can easily modify the central frequency, but the other parameters of digital channel will be the same as channel mode, press this button again to return.

Figure 3-3-14

SAVE( ): Press this button to save the result of level test.

REFRESH( ): Press this button can test again.

27

DTVLINK-T2 Operation Manual

3.3.3 Limit Display

A PASS or FAIL in big font is displayed in the screen to indicate the quality of current channel as the figure

3-3-5 and figure 3-3-10, the limit value to judge the quality of channel can be showed in the measurement setup menu, and also can be modified.

And also it can disable the judge of channel quality of in the measurement setup menu.

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DTVLINK-T2 Operation Manual

3.4 Constellation Diagram

Press press press

to return to main menu interface, and

or choose CONSTEL icon, and then

to enter constellation measurement.

DTVLINK-T2 constellation diagram function supports modes of QAM and QPSK. Here, you can get channel

POWER, MER, BER (CBER and VBER) and constellation diagram, Constellation diagram shows as figure 3-4-1.

Figure 3-4-1

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DTVLINK-T2 Operation Manual

Soft Keys Operation:

CH INFO ( ): Press this button to display the current channel information as figure 3-4-2,and user can modify all of the parameters in this menu.

Figure 3-4-2

FREQ ( ): Press this button to display the current frequency POWER, MER, BER (CBER and VBER) and constellation diagram as figure 3-4-3, press this button again to return.

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DTVLINK-T2 Operation Manual

Figure 3-4-3

3-4-4,

( ):Press this button to next page as figure

Figure 3-4-4

31

DTVLINK-T2 Operation Manual

CARRIER( ): Press this button, user can modify the carrier number by keyboard as figure 3-4-5.

Note: Here, the MER just measure one carrier which you modified by the keyboard.

Or it is the average MER for all carriers when the

“CARR” display “ALL” as figure 3-4-4.

Press this button again to return to figure 3-4-4.

Figure 3-4-5

( ): Press this button to next page as figure 3-4-6.

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DTVLINK-T2 Operation Manual

Figure 3-4-6

QUADRANT ( ): Press this button, switch the select quadrant on clockwise direction.

ZOOM IN/ZOOM OUT ( ): Press this button and switch the status of constellation diagram between zoom in and normal mode. Press zoom in key again, the selected quadrant will be zoom in, and the zoom in flag will be displayed on the top of the screen as figure 3-4-7.

33

DTVLINK-T2 Operation Manual

Figure3-4-7

and are used for switching digital channels circularly.

34

DTVLINK-T2 Operation Manual

Note: This function only supports digital channels, if the current user plan doesn’t have any digital channels, the screen will show as figure 3-4-8.

Figure 3-4-8

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DTVLINK-T2 Operation Manual

3.5 BER Statistics Measurement

Press press then press

to return to main menu interface, and

or choose BER statistics icon, and

to enter statistics measurement.

DTVLINK-T2 is able to make BER statistics during set time, the user can get MER, BER, ES, SES, COR, UNCOR,

SUM bits and TOTAL BER as figure 3-5-1.

Figure 3-5-1

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DTVLINK-T2 Operation Manual

3.5.1 Parameter Description abbreviations

ES

SES

COR

UNCOR

SUM

TOTAL

PRE-BER

TOTAL

POST-BER meaning

Error seconds

During 1s, there are one or more mistakes which can be corrected or not be corrected, and then ES plus1

Serious error seconds,

During 1s, if the result of the number of errors that can not be correct divided the total bits >

1.1E-3, SES plus1

Corrected error bits

Uncorrected error bits

Total bits

(COR+UNCOR)/SUM

UNCOR/SUM

3.5.2 Soft Keys Operations

CH INFO ( )

:

Press this button can check the current channel information, and user can modify all of the parameters in this menu.

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DTVLINK-T2 Operation Manual

TIME ( ): Press this button to set the statistics time, DTVLINK-T2 supports several fixed time(5 minutes, 15 minutes, 30 minutes, 60 minutes, 2 hours,

6 hours, 12 hours, 24 hours, and 48hours).

START/STOP ( ):Press this button will start or stop the statistics process and the screen will show as figure 3-5-2. Now any key pressed can not be respond except HOMEF3 and POWER, until the end of the statistics time.

Figure 3-5-2

38

DTVLINK-T2 Operation Manual

3.6 Spectrum Scanning

Press to return to main menu interface and press then press

or to select the SPECT icon, and

to enter spectrum function.

DTVLINK-T2’s spectrum function supports double-marker display and peak-hold function as

Figure 3-6-1. Here, you can set up span, frequency(5MHz~1052MHz), sampling mode and etc….

Press can modify the cursor location.

Figure3-6-1

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DTVLINK-T2 Operation Manual

3.6.1 Soft Keys Operation

TAB ( ): Press to modify the cursor location, and the selected parameter can be modified by press

or ,or by figure Input directly.

AUTO ( ): Press AUTO soft key to adjust reference level and scale quickly. The meter will automatically adjust them to most optimal state.

( ):Press this button to change the soft menu as figure 3-6-2, the user can press this button again to return.

Figure 3-6-2

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DTVLINK-T2 Operation Manual

STOP ( ): Pressing STOP soft key, the scanning will be stopped, and you can continue the scanning by press it again.

SAVE ( ):Press SAVE soft key to save the result of scan test.

3.6.2 Parameter Setting

You can modify or adjust measurement parameter.

Press can highlight the selected parameter and then press keys directly.

or , or press the character/digit

Figure3-6-3

41

DTVLINK-T2 Operation Manual

REF(REFERENCE LEVEL): After selecting the REF parameter, show as figure 3-6-3, press to adjust the reference level.

or

Note: The character/digit keys input is not support in

REF term.

TRC: After selecting the TRC parameter, press

to select the sampling mode (AVG or PEAK),

or

AVG: sample average mode, the display result of each point will be an average of several sample value. It will be faster than the PEAK mode, and also if you want to measure the noise of the system, you need to select this mode.

PEAK: positive-peak mode, the display result of each point will be peak value of several sample value. It will be necessary to select this mode to measure the video or audio level of analogue channels. Show as figure

3-6-4.

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DTVLINK-T2 Operation Manual

Figure 3-6-4

SCALE: After selecting the SCALE parameter, press

or to choose one scale from 1dB/, 2dB/,

5dB/ and 10dB/.

CENT(CENTER FREQUENCY): After selecting the CENT parameter, you can input the center frequency by the character/digit keys.

Note: In Spectrum Scanning function, any frequency from 5 to 1052MHz can be input.

SPAN: After selecting the SPAN parameter, press or to adjust the span among 2.5MHz, 6.25MHz,

12.5MHz, 25MHz, 62.5MHz and FullBand.

MAX: After selecting the MAX-HOLD parameter, if you select the MAX-HOLD by pressing or , the

43

DTVLINK-T2 Operation Manual screen will display both the max value and the real-time value of each point.

MARKER A: After selecting the MARKER A parameter, the red marker A becomes active marker, pressing

or

can move the red marker to the wanted view point.

MARKER B: After selecting the MARKER B parameter, the purple marker B becomes active marker, pressing

or can move the purple marker to the wanted view point.

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DTVLINK-T2 Operation Manual

3.7 Tilt/Level List Measurement

Tilt/Level list test is the effective solution to check the flatness and splitter’s gain of cable system,

DTVLINK-T2 can get levels of 12 channels and observe the measurement result and graph easily.

Press press press

to return to main menu interface, and

or and choose FAV/TILT icon, then

to enter Tilt/Level List measurement.

Please select at least four channels to do tilt test, otherwise it will pop-up one dialog box as Figure

3-7-1.

Figure 3-7-1

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DTVLINK-T2 Operation Manual

In Figure 3-7-1, press to enter the tilt channels setup menu, select the channels that you want to do tilt test as Figure 3-7-2; press or to change the highlight line, and then press the select or unselect the channel,

to

Here, the and button have been defined to page up and page down.

The "√" means this channel is selected. If you want to cancel this selection, please press

again and "√" will disappeared. The channel No. of all channels selected will be saved and displayed at the left blocks

Figure3-7-2

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DTVLINK-T2 Operation Manual

After selected , Press to return to main menu interface, and press the again to enter the

Tilt/Level List measurement. Now the Tilt measurement can be continued.

3.7.1 Tilt Graph Mode

In tilt test interface, the channels will be displayed as histogram, and test result will be displayed at the bottom of screen as Figure 3-7-3.

Figure 3-7-3

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DTVLINK-T2 Operation Manual

3.7.1.1 Soft Keys Operation

LIST ( ): Press LIST soft key to enter level list mode, as Figure 3-7-4.

Figure 3-7-4

SAVE ( ):Press this button to save the result of tilt test.

SETUP ( ): When testing, press this button to enter into Figure 3-7-2 to re-select tested channels.

3.7.2 Tilt List Mode

In figure 3-7-4, you press to switch the modes between Tilt Graph and Tilt List. In Tilt List mode, you can easily get level value of the channels tested.

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DTVLINK-T2 Operation Manual

3.7.2.1 Soft Keys Operation

GRAPH(

Figure 3-7-3.

): Press this button to enter Tilt mode, as

SAVE ( ):Press this button to save the result of level test.

SETUP ( ): When testing, press this button to enter into Figure 3-7-2 to re-select tested channels.

Here, the and button is defined to switch the tilt channel which’s test result will be displayed at the bottom of screen.

A PASS or FAIL will be displayed at the bottom of the screen, the Limit value can be modified in

Measurement Setup ( Refer to 4.4.3

) .

And also we can disable the judge of quality of channel in the Measurement Setup.

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DTVLINK-T2 Operation Manual

3.8 Channel Scanning

DTVLINK-T2 support channel scanning function in order to test the flatness and amplitude of cable TV system quickly.

Press press then press

to return to main menu interface and

or as Figure 3-8-1.

to select the SCAN icon, and

to enter Channel Scanning function

The scanning graph of current user plan is displayed on the screen, a slider in red color shows the current scanning channel.

Figure 3-8-1

Green color represents video level of analogue channels.

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DTVLINK-T2 Operation Manual

Yellow color represents audio level of analogue channels.

Blue color represents power of digital channels.

The scan function also display the channel number of scanning start channel and end channel.

3.8.1 Soft Keys Operation

TAB ( ): Press this button can modify the cursor location. Then the parameter which highlighted on the yellow color background can be modified by

.

or

MARK: In figure 3-8-1, press the or and the marker with red color will move left or right. And the test result of channel at the position of marker will be displayed on the bottom of the screen.

REFERENCE LEVEL: Press TAB to select the REF, and then it can be modified by press range of reference level: 0-120 dBuV .

or , the

VIEW: Press TAB to select the VIEW and switch between ×1, ×2, ×3, ×4 and ×5 by pressing

.

or

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DTVLINK-T2 Operation Manual

×1: Max display 30 channels in the screen.

×2: Max display 50 channels in the screen.

×3: Max display 75 channels in the screen.

×4: Max display 150 channels in the screen.

×5: Max display 255 channels in the screen.

SCALE: Press TAB to select the SCALE , and switch between 1dB, 2dB, 5dB and 10dB by pressing or

.

AUTO ( ):Press AUTO soft key to adjust reference level and scale quickly . The meter will automatically adjust them to most optimal state.

( ):Press this button to next page as figure

3-8-2, the user can press this button again to return.

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DTVLINK-T2 Operation Manual

Figure 3-8-2

STOP ( ): Press STOP soft key, the scanning will stop, and you can continue the scanning by pressing it again.

SAVE ( ):Press this button to save the result of scan test.

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DTVLINK-T2 Operation Manual

3.9 HUM Measurement

DTVLINK-T2 support HUM measurement to analogue channel.

Press press then press

to return to main menu interface and

or

Figure 3-9-1.

to select the HUM icon, and

to enter HUM function. Show as

HUM modulation is also named power hum modulation distortion, which caused by low-frequency interference of the power. (It is 50Hz in China)

Figure 3-9-1

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DTVLINK-T2 Operation Manual

3.11.1 Soft Keys Operation

50Hz/60Hz( ): Press to switch the frequency of system power between 50Hz and

60Hz,as figure 3-9-2.

Figure 3-9-2

SAVE ( ):Press this button to save the result of

HUM test .

or are used to switch analogue channels circularly. Also you can input the channel number using the character/digit keys.

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DTVLINK-T2 Operation Manual

3.10 Limit Measurement

Press press

to return to main menu interface and

or then press figure 3-10-1,

to select the LIMIT icon, and

to enter LIMIT function. As shown in

Figure 3-10-1

DTVLINK-T2 is able to detect cable TV system rapidly, and check out the number of unqualified channels and the reason of unqualified channels. The amplitude of each channel of selected user plan is checked one by one. The channel number, video level and audio level whether or not acceptable will be shown.

NOTE: DTVLINK-T2 checks the analog channel only in

Limit Test mode .

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DTVLINK-T2 Operation Manual

3.10.1 Test Results List

After the limit test scanning, the general test results of cable system will be listed. The test items are consist of minimum video level, maximum video level, maximum delta video level, minimum △ V/A, maximum △ V/A and maximum △ ADJ channels. Refer to figure 3-10-2.

Figure 3-10-2

57

Press

DTVLINK-T2 Operation Manual

to list as figure 3-10-3.

Press

Figure 3-10-3

to view the graph as figure 3-10-4.

Figure 3-10-4

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DTVLINK-T2 Operation Manual

( ):Press this button to next page as figure

3-10-5, the user can press this button again to return.

RETEST (

Figure 3-10-5

):Press RETEST to retest.

SAVE ( ):Press SAVE soft key to save the result of

Limit test .

3.10.2 Limit Edit

You can edit the limit setup in SETUP. First enter into

SETUP menu, press into MEASUREMENT

Setting, highlight LIMIT SETUP by screen displays as figure 3-10-6.

or , the

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DTVLINK-T2 Operation Manual

Figure 3-10-6

If you want to change a parameter ,press

to select the parameter, press

or

to change.

Press

to LOAD DEFAULT ,and then press you can select the default. (To view the detailed setting,please refer to 4.4.3)

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DTVLINK-T2 Operation Manual

3.11 Return Path Spectrum

Press press then press

3-11-1.

to return to main menu interface and

or to select the R-PATH icon, and

to enter R-PATH function, as Figure

Figure3-11-1

In the interface of the R-PATH function, the default parameter set is Start frequency: 5MHz, Stop frequency: 45MHz, Reference: 40dBuV, Scale: 5dB/div,

Demodulation mode: peak mode.

In this function , to view the detailed soft key instruction, please refer to 3.6.1 and 3.6.2.

Note: In Return Path Spectrum function, you can only setup the range of return path frequency by

5MHz~45MHz and 5MHz~65MHz.

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DTVLINK-T2 Operation Manual

3.12 File Management

Press press

to return to main menu interface and

or to select the FILES icon, and then press as Figure 3-12-1.

to enter FILE management function

Figure 3-12-1

DTVLINK-T2 has independent memory space to store the measurement data, which includes level, scan, tilt, limit, spectrum and HUM test results.

3.12.1 File Directory

In file list menu, All saved files was list with file names, date and time.

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DTVLINK-T2 Operation Manual

3.12.2 Save File

If you have made measurements in LEVEL, TILT, SCAN,

SPECT, LIMIT and HUM (at least one of them), Press

and select the FILE icon and then press

, the file list menu will display as figure3-12-2.

Figure 3-12-2

NEW( ) : press this button, a “SAVE THE FILE” dialog show as figure 3-12-3.

DTVLINK-T2 will give a default name for new file, also you can rename it using the character/digit keys.

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DTVLINK-T2 Operation Manual

Figure 3-12-3

After rename the new file, press or to

DATA LIST, all the parameters could be saved have been listed, and the default status is that all parameters have been selected as figure 3-12-4.

Figure 3-12-4

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DTVLINK-T2 Operation Manual

Press or to modify the cursor location, and then press item as figure 3-12-5.

to select or unselect the data

Figure 3-12-5

SAVE( ): Press this button to finish saving a file, after finished save file, the screen will return file list menu. as figure 3-12-2.

3.12.3 Read File

Press or to select the file you would like to read, and then press to Load the file. ” LOAD

THE FILE ” dialog will display as figure 3-12-6.

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DTVLINK-T2 Operation Manual

Figure 3-12-6

Normally, the data items can be opened using LIST mode( ),

Press or to select the data item, and then press (LIST) to list a data item in LIST mode as figure 3-12-7, 3-12-8, 3-12-9, 3-12-10, 3-12-11,

3-12-12.

Figure 3-12-7 is Level measurement results List.

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DTVLINK-T2 Operation Manual

Figure 3-12-7

Figure 3-14-8 is Tilt measurement results List.

Figure 3-12-8

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DTVLINK-T2 Operation Manual

Figure 3-12-9 is Scan measurement results List.

Figure 3-12-9

Figure 3-12-10 is spectrum measurement results List.

Figure 3-12-10

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DTVLINK-T2 Operation Manual

Figure 3-12-11 is HUM measurement results List.

Figure 3-12-11

Figure 3-12-12 is Limit measurement results List.

Figure 3-12-12

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DTVLINK-T2 Operation Manual

3.12.4 Delete File

In file list menu as figure 3-12-2, Select one file by press or and press DELETE( ) to delete this selected file, the “DELETE FILE” dialog will display as figure 3-12-13.

Figure 3-12-13

Press (YES) in figure 3-12-13 to return file list menu with delete select file.

Press (NO) in figure 3-12-13 to return file list menu without delete file.

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DTVLINK-T2 Operation Manual

4. Setup

4.1 Brief Introduction

Press

or press

to return to main interface and press

to select the SETUP icon, and then

to enter SETUP menu as Figure 4-1-1.

Figure 4-1-1

*INFORMATION: General information of the

DTVLINK-T2, includes manufacturer information, version and so on.

*GENERAL: The setup includes auto shutdown time setting, language selection, date and time setting, files status and option selection(Select the DVB-C

/DVB-T2 option).

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DTVLINK-T2 Operation Manual

*MEASUREMENT: Level unit, Level Calibrate, Limit setup, Auto Diagnosis and Voltage & temperature measurement.

*CHANNEL PLAN : The setup for channel plan includes user plan selection, learn and edit user plan.

*LOAD DEFAULT : Load the default values of system configuration.

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DTVLINK-T2 Operation Manual

4.2 INFORMATION

This is the information of the instrument, Refer to

Figure 4-2-1. It includes serial number, software version, hardware version, calibration date and so on.

Figure 4-2-1

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DTVLINK-T2 Operation Manual

4.3 GENERAL

4.3.1 Shutdown Time

To save the power, the instrument can be set to shutdown automatically for inactive keypad after 3 minutes, 5 minutes, 10 minutes ,30 minutes and

ON(never shutdown mode ), as Figure 4-3-1.

Figure 4-3-1

4.3.2 Language Selection

The language of DTVLINK-T2 can switch among English,

Turkish, Spanish and Chinese as figure 4-3-2. After choose, instrument will transform menu automatically.

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DTVLINK-T2 Operation Manual

Figure 4-3-2

Note : Contact AD INSTRUMENTS for more languages.

4.3.3 Date and Time

When there is something wrong in system date or clock, user can calibrate new date or time, as Figure

4-3-3.

Figure 4-3-3

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DTVLINK-T2 Operation Manual

4.3.4 Files Status

This interface shows the number of files have been saved, and also show the Memory status as figure

4-3-4.

Figure 4-3-4

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DTVLINK-T2 Operation Manual

4.3.5 Option

This section is used for user to enable or disable the optional functions by grant authorization. as figure

4-3-5.

Figure 4-3-5

In figure 4-3-5, press ENTER( ) and input correct code to enter the option interface, as figure 4-3-6,4-3-7.

Figure 4-3-6

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DTVLINK-T2 Operation Manual

Figure 4-3-7

Note : Please contact AD INSTRUMENTS or our local distributor to buy the option password.

Enable/Disable( ): In figure 4-3-7, user can press

to enable or disable the DVB-C option.

4.3.5.1 Enable Optional Function

Press ENABLE ( ), screen will display a dialogue to ask for the corresponding password. as figure 4-3-8

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DTVLINK-T2 Operation Manual

Figure 4-3-8

Note : Please contact AD INSTRUMENTS or our local distributor to buy the DVB-C/T2 function code.

Here user need to input password by character/digit,

and keys, as figure 4-3-9.

Figure 4-3-9

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DTVLINK-T2 Operation Manual

After inputting correct password and press ENTER( ), the corresponding optional function will be enabled, in figure 4-3-10.

Figure 4-3-10

4.3.5.2 Disable Optional Function

In figure 4-3-10, press DISABLE ( ) to disable the optional function, screen will display as figure 4-3-11.

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DTVLINK-T2 Operation Manual

Figure 4-3-11

In figure 4-3-11, if press YES ( ), the corresponding optional function will be disabled, but if press NO ( ), the disable command will be canceled and screen will still display as figure 4-3-10.

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DTVLINK-T2 Operation Manual

4.4 Measurement Parameter Setup

4.4.1 Level Unit

4.4.2 Level Calibrate

Figure 4-4-1

Figure 4-4-2

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DTVLINK-T2 Operation Manual

User can make amendment and compensation of the measure data in all level measurement function, press

MODIFY( ) to highlight the level offset box and then press or to adjust it and press

ENTER( ) to enable the input data.

4.4.3 Limit Setup

`

Figure 4-4-4

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DTVLINK-T2 Operation Manual

Figure 4-4-5

Figure 4-4-6

Four pages of Limit setting have been provided as

Figure 4-4-3, Figure 4-4-4, Figure 4-4-5 and Figure

4-4-6. Five Limit items included in page one(1/4) , which is used for DVB-T singles test. The default value of these Limit items are list as Table 4-4-1. The difference between MAX POWER and MIN POWER

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DTVLINK-T2 Operation Manual must be larger than six dB.

Table 4-4-1

Item

Minimum Power

Maximum Power

MIN MER

CBER

VBER

Page two(2/4) is used for analog TV test.

Limit

50dBμV

90dBμV

10dB

1E-5

1E-7

The default value of these Limit items are list as Table

4-4-2.

The difference between MAX VIDEO and MIN

VIDEO must be larger than six dB.

Table 4-4-2

Item

Minimum Video level

Maximum Video level

Minimum △ V/A

Maximum △ V/A

Maximum VID

Maximum VID DEV

Limit

60dBμV

100dBμV

10dB

20dB

10dB

3dB

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DTVLINK-T2 Operation Manual

Page three(3/4) is used for DVB-C singles test. five limit items list include of MIN POWER, MAX POWER, MIN

MER, MAX PRE-BER and MAX POST-BER. The default value of these Limit items are list as Table 4-4-3.

The difference between MAX POWER and MIN POWER must be larger than six dB.

Table 4-4-3

Item

Minimum Power level

Maximum Power level

Minimum MER

Maximum PRE-BER

Maximum POST-BER

Limit

50dBμV

90dBμV

32dB

1.0E-7

1.0E-9

Page three(4/4) is used for tilt measurement, two limit items list including of MIN TILT and MAX NOISE. The default value of these Limit items are list as Table

4-4-4.

Item

MAX TILT

MAX NOISE

Table 4-4-4

Limit

10dBμV

30 dBμV

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DTVLINK-T2 Operation Manual

To set the test limit, you can choose limit item by press

TAB( ), and then press or to adjust it.

If you want to load default values of all limit items on each page, please press the TAB( ) to choose the

LOAD DEFAULT button on the bottom of that page, and then press to confirm.

NOTE: If the digital channels have been included in tilt measurement with analogue channels, the power of digital channels will be add a fixed offset so that it can be compare with video of analogue channels.

4.4.4 Auto Diagnosis

You can enable the auto diagnosis function( PASS and

FAIL , refer to 3.3.3) as figure 4-4-7.

Figure 4-4-7

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DTVLINK-T2 Operation Manual

NOTE: Before the auto diagnosis function can be work correctly, the Limit items in section 4-4-3 must be set the valid values.

4.4.5 Voltage and temperature

The button “VOL & TEMP” here is used to enter the measurement interface Figure 4-4-8.

4.4.5.1 Battery Voltage

As Figure 4-4-8, battery voltage will be displayed on the screen. When it is lower than 10.6V, this meter will remind that it will shut down automatically soon.

Figure 4-4-8

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DTVLINK-T2 Operation Manual

4.4.5.2 Trunk Voltage(AC LINE)

This meter will automatically judge whether it is AC or

DC in the trunk, and display the trunk voltage on the screen as Figure 4-4-9.

Figure 4-4-9

4.4.5.3 Temperature Inside

DTVLINK-T2 can monitor inside temperature itself, and you can press or to choose the display unit: Celsius or Fahrenheit, refer to Figure 4-4-10 and

Figure 4-4-11.

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DTVLINK-T2 Operation Manual

Figure4-4-10

90

Figure4-4-11

DTVLINK-T2 Operation Manual

4.5 Channel Plan

4.5.1 Select User Plan

Up to five user plans can be built and saved. The user plans are labeled as A, B, C, D, and E. User can choose one as current user plan as Figure 4-5-1. Then, the meter will measure according to the selected the user plan.

Figure 4-5-1

NOTE: DTVLINK-T2 has five default user plans.

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DTVLINK-T2 Operation Manual

4.5.2 Channel Number Type

You can set the channel number to be displayed in digital(numeric) mode or standard (alphanumeric) mode. After choose, the meter will show the channel number as you desired in any measurement mode.

Refer to Figure 4-5-2.

Figure 4-5-2

4.5.3 Learn User Plan

You can build and store up to five user plans in meter.

Before first measurement, you should build the user plan to make the meter be compatible with your cable system.

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DTVLINK-T2 Operation Manual

NOTE: The LEARN USER PLAN will build the new user plan and replace the current selected user plan. If build other user plans, you can enter into SELECT USER

PLAN and then make the LEARN USER PLAN operation.

Detailed operation refer to 3.2.

4.5.4 Edit User Plan

The user plan is combined by following:

* Digital (numeric) channel number

* Standard (alphanumeric) channel number

* Channel type (Analogue, DIGI, Single Freq, DUAL )

* Carrier frequency

* Audio offset

* Activation status

* Modulation

* SR (Symbol rate)

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DTVLINK-T2 Operation Manual

Figure 4-5-3

EDIT CHANNEL PLAN will show the channels list on the screen as Figure4-5-3 , you can only exit this function by press the HOME( ) key, press or

to highlight one channel, and press edit status as Figure 4-5-4.

to

Figure 4-5-4

NOTE : Any edit here will be saved when you exit the screen.

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DTVLINK-T2 Operation Manual

5. Power Supply

5.1 Battery

DTVLINK-T2 uses built-in 12.6V 1.5AH Li-Polymer battery and works over 5 when fully charged. When the voltage of the battery drops below 11V, the battery icon flashes in screen. Once the voltage of the battery is lower than 10.6V, the instrument will shut down automatically. The charge time is about 3 hours.

NOTE :

1.The meter can be only charged by the charger provided together with DTVLINK-T2.

2.When upgrading the software, please keep the power on and don’t interrupt the process, otherwise it will cause the meter frozen.

3.Low temperature may reduce the capability of the battery, but the battery will not be damaged.

4.Please replace the battery when its working hours shorten distinctly.

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DTVLINK-T2 Operation Manual

5.2 Charging

Please charge the instrument as following charging process:

1.

Insert the charger output plug to DTVLINK-T2’ DC charge socket.

2.

Connect the charger to AC 100V-240V Power and the charger indicator will light with red.

3.

When indicator become to green, the instrument has been fully charged(It is suggested to charge another one hour after indicator change to green.

This way can extend the battery life). Then you can disconnect the charger input plug with power and pull out the charger output plug.

NOTE:

The instrument can not be charged in the temperature beyond 10 ℃ ~35 ℃ , otherwise the battery life will be shorten.

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DTVLINK-T2 Operation Manual

6. Port

The instrument can communicate with a PC through the 5 Pin communication port. Refer to figure 6-1.

Figure 6-1

1 ---- TXD 2 ---- RXD 3 ---- NC

4 ----+5V 5 ---- GND

Management PC software- Toolbox is provided as standard. You can remotely control the instrument to do the measurement and the measurement data will be displayed as graph on the PC monitor for analysis and printing.

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DTVLINK-T2 Operation Manual

7. Specification

DVB-T

Frequency

Range

Function

DVB-T Signal

Parameters

Channel

Power

MER

BER

5~1052MHz

Power, MER, CBER, VBER

Carriers 2K/8K(Set by user)

Guard Interval 1/4 、 1/8 、 1/16 、

Code Rate

1/32(Set by user)

1/2 、 2/3 、 3/4 、 5/6 、

Modulation

7/8

QPSK 、 16QAM 、

64QAM

Spectral

Inversion

Range

Automatic

30~100dBuV

Accuracy

Range

Accuracy

±2.0dB

~30dB

±2.0dB

CBER,VBER

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DTVLINK-T2 Operation Manual

DVB-T2

Frequency

Range

Function

DVB-T2

Signal

Parameters

Channel

Power

MER

BER

5~1052MHz

Power, MER, CBER, LBER

Carriers

Guard

Interval

2K/8K/4K/1K/16K/32K(Set by user)

1/32 、 1/16 、 1/8 、 1/4 、

1/128 、 19/128 、 19/256

(Set by user)

Code Rate 1/2 、 3/5 、 2/3 、 3/4 、 4/5 、

5/6

Modulation QPSK 、 16QAM 、 64QAM 、

256QAM

Spectral

Inversion

Range

Automatic

30~100dBuV

Accuracy ±2.0dB

Range ~32dB

Accuracy ±2.0dB

CBER,LBER

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DTVLINK-T2 Operation Manual

DVB-C

Frequency :

Range:

Accuracy:

Resolution:

Receive bandwidth:

Channel Type:

5MHz to 1052MHz

±50×10

10 KHz

-6

280 KHz

(20 ℃ ±5 ℃ )

Analogue TV: TV

Digital TV: 16/32/64/128/256 QAM

Analog Level Measurement:

Range:

Accuracy:

Resolution:

Input impedance :

Digital Channel:

30dB

0.1dB

75Ω

±1.5dB

V to 120dB

V demodulation type: support :

SR: standard : ITU-T J.83 Annex

A/B/C standard.

16/32/64/128/256 QAM

1MS/S-7MS/S

100

DTVLINK-T2 Operation Manual bandwidth : 6/8MHz

MER:

Accuracy :

BER:

39dB

±2dB

( representative )

1E-3 to 1E-9 Before and After R-S

Decoding

Power measure type:

Average Power

QAM

Level range:

Accuracy : resolution : 0.1dB

Channel Scan :

30dB

V to 110dB

V

±2.0dB

Number of channels:

Zoom:

160 channels max.

Scanning speed: 5 channels/ s

Scale: 1, 2, 5, 10 dB/div

1X, 2X, 3X, 4X, 5X five levels of magnification

Frequency spectrum :

Bandwidth:

Scale:

Tilt measurement:

2.5MHz, 6.25MHz, 12.5MHz,

25MHz, 62.5MHz, fullband

1, 2, 5, 10 dB/ div

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DTVLINK-T2 Operation Manual

Number of channels:

Resolution:

4 to 12

0.1dB

Trunk Voltage measurement:

Input range:

Accuracy:

Resolution:

0V to 100V (AC/DC)

±2V

0.1V

Other function:

Storage:

Communication

Port:

Store

Temperature:

Dimensions:

Weight:

Display:

512K byte

RS 232C

-20 ℃~ 50 ℃

Handset about

218mm×95mm×49mm

Handset about 700g

320×240 OLED

Power supply

Battery:

Charger:

Work time:

Charge time:

12.6V 1.6AH LiIon battery

AC 100 V to 240V 50-60Hz

4 .5hours(full charged battery)

~ 3hours

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DTVLINK-T2 Operation Manual

8. Standard Accessories

Standard Accessories

DTVLINK-T2

AC-DC power adapter/charger

Data cable(Serial to USB)

Carrying bag

F connector

Manual and Toolbox software CD

Quantit

1

1

1

2

1

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DTVLINK-T2 Operation Manual

Add: Cardeña 9, local

28053 – Madrid – Spain

Tel: +34 91 661 30 37

Fax: +34 91 661 49 17

Http:// www.adinstruments.es

E-Mail: [email protected]

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