Labgear DAT103 Manuale utente
DAT103
DVB-T SIGNAL ANALYZER
Operating Manual
3
TABLE OF CONTENTS
TABLE OF CONTENTS................................................................................................................... 3
1 GENERAL INFORMATION ................................................................................................... 4
1.1 I
NTRODU TION
............................................................................................................4
1.2 S
AFETY PRE AUTIONS
.................................................................................................4
2 GENERAL DESCRIPTION AND PRINCIPLE OF OPERATION..................................... 5
2.1 F
UN TIONS
.................................................................................................................5
2.2 E
NVIRONMENTAL ONDITIONS
.......................................................................................6
2.3 P
A KAGE ONTENTS
....................................................................................................6
2.4 S
PE IFI ATION
............................................................................................................6
2.4.1 Construction.................................................................................................................7
3 PREPARING TO OPERATE................................................................................................... 7
4 PREPARING PROCEDURES ................................................................................................. 8
4.1
ONTROLS AND INDI ATORS
.........................................................................................8
4.2 P
REPARING FOR MEASUREMENT
...................................................................................8
4.3 M
EASUREMENT PRO EDURE
.........................................................................................8
4.3.1 General information.....................................................................................................8
4.3.2 LEVEL measurement mode........................................................................................10
4.3.3 SCAN measurement mode..........................................................................................12
4.3.4 IPPLE measurement mode ......................................................................................13
4.3.5 EXPANDED SPECT UM measurement mode..........................................................14
4.3.6 ME /BE measurement mode ...................................................................................14
4.3.7 CONSTELLATION measurement mode.....................................................................16
4.3.8 AMP Power Control...................................................................................................17
4.4 D
ATA MANAGER
.........................................................................................................18
4.4.1 General information...................................................................................................18
4.4.2 Channel plan manager...............................................................................................18
4.4.3 Data log manager ......................................................................................................21
4.5 S
ETUP
......................................................................................................................24
4.6 S
ELF
-
TEST
................................................................................................................25
4.7 I
DENTIFI ATION
.........................................................................................................26
4.8 P
OMMUNI ATION
..................................................................................................26
4.8.1 General information...................................................................................................26
4.8.2 Software installation ..................................................................................................27
4.8.3 USB driver installation ..............................................................................................27
4.8.4 PC communication launch .........................................................................................27
4.8.5 Firmware update........................................................................................................27
4.8.6 Channel template edit ................................................................................................28
5 MAINTENANCE ..................................................................................................................... 30
6 TROUBLESHOOTING .......................................................................................................... 30
7 STORAGE ................................................................................................................................ 31
8 TRANSPORTATION .............................................................................................................. 31
4
1 GENERAL INFORMATION
1.1 Introduction
This operating manual introduces the design, functions and basic instructions for
operation of the LABGEAR DAT103 Digital and Analogue Television analyzer.
DAT103 is designed to permit optimal testing and adjustment of complete television
and broadcast distribution networks, network components and related electronic products.
The analyzer allows measurement DVB-T Digital and Analogue TV signals.
DAT103 can be useful in a laboratory, or in the field thanks to flexible powering options
that includes an internal re-chargeable Li-ion battery.
In this manual the following abbreviations are used:
AD - Analog-to-Digital onverter
BER - Bit Error Ratio
D - compact disk
OFDM - oded Orthogonal Frequency Division Multiplexing
DVB-T - Digital Video Broadcasting - Terrestrial
IF - Intermediate Frequency
L D - Liquid rystal Display
MER - Modulation Error Ratio
MPEG2 - Motion Pictures Expert Group
P - Personal omputer
preBER - BER before Viterbi decoder
postBER - BER after Viterbi decoder
QAM - Quadrature Amplitude Modulation
QPSK - Quadrature Phase Shift Keying
1.2 Saf ty pr cautions
Thoroughly inspect the product and carefully read the related documentation to get
acquainted with all the safety markings and instructions before you start to operate the
analyzer.
WARNING Only trained service personnel should attempt to repair this analyzer.
CAUTION Tuning the analyzer and replacement of the components that influence the
accuracy of measurements without service personnel is strictly prohibited, since the
components used in the Analyzer are purpose-made and their replacement will result in
inaccurate operation of the Analyzer. To exclude the possibility of mechanical damage to
the DAT103, the instructions regarding the storage and transportation (Sections 7 and 8)
of the analyzer must be observed.
Take care to keep coax braid wire cuttings away from your analyzer. Just one piece
inside can be expensive to locate and remove and may even cause permanently damage.
5
2 GENERAL DESCRIPTION AND PRINCIPLE OF OPERATION
2.1 Functions
The DAT103 offers measurement of the following parameters:
• Analog channels: video carrier level, V/A ratio, and /N ratio.
• Digital channels: signal level measured in channel power.
• DVB-T signals: measurement of reception quality parameters:
• Modulation Error Ratio (MER)
• Bit Error Ratio (BER) before and after Viterbi decoder
• Error packets after Reed-Solomon decoder counter
• onstellation diagram.
DAT103 settings including channel frequency, subcarriers number, subcarriers
modulation type, guard interval, code rate and spectrum inversion are set
automatically. The DAT103 can be connected to a personal computer to access
additional functions. The analyzer also measures D and A voltages of line
power supplies in TV and broadcasting distribution networks.
Front and bottom views of the analyzer are shown in Figure 1.1. and Figure 1.2.
Figure 1.1 Figure 1.2
6
2.2 Environm ntal conditions
Normal operating conditions:
a) ambient temperature (23±5) °С;
b) relative air humidity (55±25)%;
c) atmospheric pressure 84-106 kPa (630-795 mm Hg);
d) voltage transients correspond to installation category AT. II.
Rated operating conditions:
a) ambient temperature from -10 to 50 °С;
b) relative air humidity not greater than 90% at 25 ºС temperature;
c) atmospheric pressure 84-106 kPa (630-795 mm Hg).
2.3 Packag cont nts
The analyzer package includes:
a) DAT103 DVB-T Signal Analyzer .......................................1 pc;
b) Impact resistant holster ....................................................1 pc;
c) Li-ion battery (internal) ......................................................1 pc;
d) “F”-”F” adapter...................................................................1 pc;
e) 12V/1.2A charger ..............................................................1 pc;
f) ompact disc ....................................................................1 pc;
g) Reference plastic card ......................................................1 pc;
h) Operating Manual..............................................................1 pc.
2.4 Sp cification
Operating frequency range .......................................................... 45 to 900 MHz
Frequency Resolution.................................................................. 125 kHz
hannel plans.............................................................................. Australia, NewZealand
and one, ustomized plan loaded from Personal omputer (section 4.9.6)
Input parameters:
input impedance within operating frequency range.......................................75 Ohm
input impedance for frequencies up to 50 Hz................................at least 200 kOhm
A input voltage range for frequencies over 5 MHz……………………3 V
A and D input voltage range for frequencies under 100Hz………..30V
Signal level measurement range, Analogue ................................ 30 to 120 dBµV
Measurement level resolution ...................................................... 0.1 dB
Accuracy within 30 – 120 dBµV level range................................. ±1.5 dB
Accuracy at operating temperature.............................................. ±2.2 dB
Measurement channel bandwidth for -3 dB level ......................... 230 ± 60 kHz
Frequency indication.................................................................... 6 character L D
hannel number indication .......................................................... 3 character L D
Signal level indication .................................................................. 4 character L D
Input signal parameters
hannel bandwidth................................................................. 7 or 8 MHz
Modulation type ...................................................................... OFDM
Subcarrier modulation type..................................................... QPSK, QAM16, QAM64
Subcarrier number.................................................................. 2k, 4k or 8k
7
Guard interval......................................................................... 1/32, 1/16, 1/8, 1/4
Hierarchical modulation type .................................................. α=1, α=2, α=4
ode rate................................................................................ 1/2, 2/3, 3/4, 5/6, 7/8
hannel power range, Digital....................................................... 30 to 110 dBµV
MER measurement range (for QAM64, code rate 3/4) ................ 14 to 35 dB
MER measurement resolution ..................................................... 0.1 dB
MER measurement accuracy at operating channel power........... ±2.0 dB
BER measurement range
preBER................................................................................... 1.0x10
-1
to 1.0x10
-8
postBER ................................................................................. 1.0x10
-2
to 1.0x10
-8
hannel power threshold (postBER less than 2x10
-4
)
For QAM64, code rate 3/4, SNR=46 dB ................................. 40 dBµV
Frequency auto tuning range ....................................................... ±0.500 MHz
Warm-up time, less than .............................................................. 5 min
DAT103 powering options:
A mains via 90-264V 50/60 Hz 12V/1.2A charger included
10 to 14 V D external source, with ripple level no greater than …………0.5 V
internal Li-ion battery of 1500 mAh capacity
urrent consumed from external power source or batteries, not greater than …0.6 A
AMP power supply voltage settings…………………….……..…… 12V or 24V
AMP power supply power, no more than………………………..…. 3 W
Power from external D continually for no more than ………………………….…24 hrs
Typical battery charge life under normal conditions (1500 mAh capacity)……… 3 hrs
Mean time between failures, no less than.................................... 10,000 hours
Average life expectancy............................................................... exceeds 5 years
Dimensions.................................................................................. 193 x 94 x 53 mm
Package dimensions.................................................................... 255 х 180 х 70 mm
Weight.......................................................................................... 0.5 kg
Weight in package ....................................................................... 0.95 kg
2.4.1 Construction
The DAT103 is a quality handheld electronic instrument built in a tough plastic field
case that fits snugly in its matching soft shockproof holster.
The front of the Analyzer includes a silicon keypad and a graphical Liquid rystal
Display (Figure 1.1). The bottom panel has a USB P connector and an external power
source connector (Figure 1.2). The 75-Ohm RF input on the top panel is an “F”-male
connector to which an “F” female – female adapter should be used, which makes the RF
input connector replaceable.
3 PREPARING TO OPERATE
When you first receive your instrument, check the contents against the list provided
(Section 2.3). heck the outside of your instrument to make sure your DAT103 is free
from any signs of mechanical damage.
If the DAT103 has been stored in an extremely humid, hot or cold environment, allow it
to acclimatize for at least for 2 hours before powering up.
8
4
PREPARING PROCEDURES
4.1 Controls and indicators
The location of controls, indicators and connectors is shown in Figure 1.1. These
elements have the following functions:
a) F1, F2, F3 keys enable functions that correspond to the on screen icons;
b) key allows you to return to the previous menu level;
c) key enables AMP power supply control;
d) , , ◄ , and ► arrows allow you to edit the current operation mode;
e) key allows selection of an item from a list;
f) key switches the Power of on/off;
g) 12V DC 1.2A connector is for an external power source;
h) USB is for connection to a host computer;
i) «INPUT» is an “F”-male connector for RF signal input.
4.2 Pr paring for m asur m nt
Before operating your DAT103, read this Operating Manual carefully, identifying the
location of the controls and indicators (Section 4.1).
For operation with the external power source, connect the charger to the D connector
on the bottom panel of the DAT103 and then to mains power.
Default DAT103 power for stand-alone operation is the internal battery. Push and hold
the key until the L D backlight turns on to start.
The following message (see Figure 4.2.1) will appear on the screen:
Figure 4.2.1
The screen displays the name and model of the Analyzer. After approximately 1
second, the Analyzer will open the main mode-selection menu (Figure 4.3.1), further
referred to as “Main menu”.
4.3 M asur m nt proc dur
4.3.1 G n ral information
The Analyzer features on-screen menus for selection of modes of operation. The icons
of the menu correspond to various functions. The Main menu (see Figure 4.3.1) will
appear on the screen after the Analyzer has completed its power up sequence.
9
The Main menu is divided into 2 halves, to step between press the or arrow. You
will see the other Main menu options (Figure 4.3.2). To return to the previous line press
the or arrow again. Function of menu are selectable with the function keys F1, F2 and
F3, which are located under each icon. To return to the Main menu from any function,
press key.
The 6 Main menu functions are accessed with the following icons:
a) LEVEL measurement ........................................................ ;
b) S AN measurement ......................................................... ;
c) MER/BER measurement................................................... ;
d) Service menu .................................................................... ;
e) Data manager menu ......................................................... ;
f) P connection................................................................... .
When is chosen from the Main menu, the Service menu appears on screen
(Figure 4.3.3), and when is chosen, the Data manager menu appears (Figure 4.3.4).
Function of service menu and data manager menu are selectable with function keys
F1, F2 and F3, which are under the relevant icons. To return to previous menu from the
selected function, press key. To return to the Main menu press again.
The 5 Service menu and data manager functions are accessed with the following icons:
a) Setup................................................................................. ;
b) Self-test............................................................................. ;
c) Identification...................................................................... ;
d) hannel plans manager .................................................... ;
e) Data log manager.............................................................. ;
Figure 4.3.1 Figure 4.3.2
Figure 4.3.3 Figure 4.3.4
10
The Analyzer offers six modes to measure TV signal parameters:
1- TV channel signal level and power selected by frequency, V/A and /N ratios, as
well as A and D voltages at the input of the Analyzer in LEVEL mode;
2- TV channel level in S AN mode;
3- TV channel level ripple in RIPPLE mode;
4- Signal spectrum view in SPE TRUM mode;
5- DVB-T signal quality parameters in MER / BER mode;
6- DVB-T relative constellation diagram in ONSTELLATION mode.
LEVEL, S AN and MER/BER modes are selectable from the Main menu. SPE TRUM
and RIPPLE mode are selectable from S AN mode by pressing function keys F2 and F3,
correspondingly. ONSTELLATION mode is selected from MER/BER mode by pressing
F2 function key.
4.3.2 LEVEL m asur m nt mod
The icon in the Main menu refers to Level mode. In this mode you can measure
TV channel parameters and signal level at a selected channel or frequency.
The screen view and channel parameter measurement mode is represented in Figure
4.3.5 (for an analog channel) and in Figure 4.3.6 (for a digital channel).
You will see the following data on the screen:
1 – hannel number
2 – hannel level measured in dBµV, dBmV or dBm
3 – Selected frequency in MHz
4 – Vision to Audio carrier ratio in dB for Analogue, D indicates Digital signal detected.
5 – ommand line with commands activated by F1, F2 or F3 keys
6 – hannel name (when working with selected channel plan)
7 – Direct voltage or effective alternating voltage at the input of the Analyzer, at 50/60
Hz frequency, in V
8 – Status of AMP power supply (Section 4.3.8)
9 – arrier to Noise ratio in dB.
When a digital channel is detected the analyzer will show ‘D’ in place of ‘V/A’.
When you open LEVEL mode, you can see the channel plan name indicated by
«Plan:», if one has been selected.
When the LEVEL function is activated, the DAT103 measures the parameters of the TV
channel, which was last selected in one of the measurement modes. This mode will be
indicated by Ch shortcut in command line. Digital or analog modulation type corresponds
Figure 4.3.5 Figure 4.3.6
11
to the selected channel plan. If a channel plan has not been selected, the modulation type
is detected automatically.
Three analog channel parameters are measured. Video carrier level at the frequency
tuned. If a channel plan has been selected, the frequency tuned will follow the selected
plan. Vision to Audio ratio is determined by also measuring the audio carrier level and
subtracting this value from the video carrier. The V/A value will be displayed on the screen
in position 4 (Figure 4.3.5).
To measure analogue arrier to Noise ratio the Analyzer compares a measurement at
the tuned frequency with the lowest content of the useful components of RF signal within
the channel bandwidth. /N ratio will appear in position 8 (Figure 4.3.5).
For digital channels, the Analyzer measures signal power within the channel bandwidth
and /N ratio. To measure /N ratio, the Analyzer compares a measurement at the tuned
frequency with the lowest content of the useful components of RF signal outside the
channel bandwidth. /N ratio will appear in (Figure 4.3.6).
The range of voltage measurement at the Analyzer input is from 10 to 100 V. The
absolute error of the measurement is lower than ±1.5 V. The measured value of the
voltage is indicated in position 7 (Figure 4.3.5). If the voltage is D you will see V= on the
screen, if it is A V~ will appear.
To measure channel parameters, select the required channel by ◄ and ► arrows.
If no channel plan is selected, using ◄ and ► arrows you can switch to any channel in
accordance with the channel template (Section 4.7).
Once a signal is detected, the Analyzer will automatically determine the channel type.
The measurements will be performed in accordance with these parameters.
If a channel plan has been selected (Section 4.5), the selection will be performed
between the channels of the plan.
You can access other measurement modes using functional keys. F1 key will open
S AN mode (Section 4.3.3). F2 key will activate the mode of signal level measurement in
a frequency point. F3 key will open MER/BER measurement mode (Section 4.3.6), if the
selected channel is digital.
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