IT-19C
QAM SIGNAL ANALYZER
OPERATING MANUAL
Revision 1.0 of 06.2019
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Table of contents
1 Introduction ................................................................................................................. 4
2 General Description and Principle of Operation ............................................................ 6
2.1 Function .......................................................................................................................... 6
2.2 Environmental Conditions .............................................................................................. 6
2.3 Package Contents ........................................................................................................... 6
2.4 Specifications .................................................................................................................. 7
2.5 Application Area ............................................................................................................. 8
3 Preparation for Operation ............................................................................................ 8
4 Operation Procedure .................................................................................................... 9
4.1 Controls and Indicators .................................................................................................. 9
4.2 Preparations for Measurement...................................................................................... 9
4.3 Measurement Procedure ............................................................................................. 10
4.3.1 General Information .............................................................................................. 10
4.3.2 Channel Measurement Mode ............................................................................... 11
4.3.3 Scan Measurement Mode ..................................................................................... 12
4.3.4 Spectrum Measurement Mode ............................................................................. 14
4.4 Data Logger Function ................................................................................................... 15
4.4.1 General Information .............................................................................................. 15
4.4.2 Channel Plan List ................................................................................................... 15
4.4.3 List of Limit Plans ................................................................................................... 18
4.4.4 Channel Data Logger ............................................................................................. 20
4.5 General Settings ........................................................................................................... 24
4.6 Analyzer Self-Test ......................................................................................................... 25
4.7 Identification Data Readout ......................................................................................... 26
4.8 Operation Controlled by PC ......................................................................................... 26
4.8.1 General Information .............................................................................................. 26
4.8.2 ViewIt19C Software ............................................................................................... 26
4.8.3 SoftManager PC Software ..................................................................................... 27
4.8.4 Connection to a PC ................................................................................................ 28
4.9 Updating Firmware....................................................................................................... 28
4.9.1 General Information .............................................................................................. 28
4.9.2 Updating Firmware Via Internet ............................................................................ 29
4.9.3 Manual Firmware Updating .................................................................................. 29
4.9.4 Emergency Firmware Update ................................................................................ 29
4.10 Battery Operation ...................................................................................................... 30
5 Maintenance .............................................................................................................. 31
6 Troubleshooting ......................................................................................................... 31
7 Storage....................................................................................................................... 32
8 Transportation ........................................................................................................... 32
9 Labeling...................................................................................................................... 32
10 Warranty Information .............................................................................................. 32
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1 Introduction
This Operating Manual is intended for introducing the design, functions, and basic instructions
related to operation and servicing of the IT-19C QAM Signal Analyzer (Analyzer).
Reliability of IT-19C is ensured by fulfilment of regular maintenance procedures. These procedures
and their intervals are described in Section 5.
Repair of the Analyzer should be performed at the factory of origin or in places with special
equipment by people with special training who are familiar with the device and its principle of
operation. During the start-up process the special equipment is used, therefore the adjustment of
the Analyzer or replacing elements that affect the measurement accuracy is prohibited.
Follow the rules of storage and transportation in sections 7 and 8 in order to avoid any mechanical
damage of the Analyzer.
In this manual the following abbreviations are used:
• AC – alternating current;
• BER - Bit Error Ratio;
• DC – direct current;
• MPEG - Motion Pictures Expert Group (the name of the video and audio compression
standard);
• PC - Personal Computer;
• PER – Packet Error Ratio;
• RF - radio frequency;
• TV – television;
• USB – Universal Serial Bus.
The appearance of the Analyzer and its components are displayed in Figure 1.1 and Figure 1.2.
The Analyzer has a plastic impact-resistant collapsible housing. IT-19C Analyzer’s overall
dimensions are 193x94x53 mm.
There is a keypad and a graphic display on the top panel of the base module (Figure 1.1). On the
front panel, there is a connector for connecting the device to a computer and a connector for
connecting an external power source (Figure 1.2). There is a 75 input “F-male” connector on the
back panel .
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Figure 1.1
Figure 1.2
This Operating Manual is made for the 02.019.02 hardware version of IT-19C Base Unit, software
version 01.01.XX.XX of IT-19C and ViewIt19С software version for PC.
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2 General Description and Principle of Operation
2.1 Function
TheDVB-C IT-19C signal Analyzer is designed formeasuringparameters of TV channels with
analog modulation: video level, video level to sound level ratio, video level to noise level ratio. You
can also measure power of TV channel with digital modulation.
For signals of DVB-C and J.83 Annex B digital cable television standards, the Analyzer allows to
measure parameters of reception quality — Modulation Error Ratio (MER), Bit Error Ratio (BER),
the number of wrong MPEG stream packets, the noise immunity margin (MARGIN), and the
constellation diagram (on PC screen).
IT-19C provides with the automatic settings detection mode (channel frequency, symbol rate,
modulation type). There is a spectrum analysis mode aimed at searching for any unwanted signal.
The Analyzer can be connected to a PC for additional service modes. The Analyzer allows you to
measure the direct and alternating voltage of remote distribution receiving systems of TV and
radio broadcasting network power supply.
2.2 Environmental Conditions
Normal operation conditions:
1) ambient temperature (23±5) ºС;
2) relative air humidity(55±25)%;
3) atmospheric pressure 84-106 kPa (630-795 mm Hg);
4) voltage transmitters correspond to CAT. II installation category.
Rated operation conditions:
1) ambient temperature -10 to 5°С;
2) relative air humidity 90% to 25 ºС temperature;
3) atmospheric pressure 84-106 kPa630-795 mm Hg).
2.3 Package Contents
The Analyzer package includes:
1) The IT-19C Analyzer ............................................................... 1 pc.;
2) Rubber boot ........................................................................... 1 pc.;
3) Li-Po battery .......................................................................... 1 pc.;
4) F-F RF adapter ........................................................................ 1 pc.;
5) 12V/1.2A charger ................................................................... 1 pc.;
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6) Reference card ....................................................................... 1 pc.;
Input parameters:
- input impedance within operating frequency range:……………………. 75 Ohm;
- input impedance for frequencies up to 50 Hz:……………… at least 200 kOhm.
Allowed resulting value of AC input voltage for frequencies over 5 MHz:...3 V.
Allowed resulting value of AC and DC input voltage for frequencies
under 100 Hz: …………………………………………………………………………………….. 150 V.
7) Quick start guide .................................................................... 1 pc.;
8) Operating manual is available for download from http://www.planarchel.ru.
2.4 Specifications
Operating frequency range .......................................................................................... 5 to 1006 MHz
Frequency resolution ............................................................................................................... 125 kHz
Measurement level range ............................................................................................ 30 to 120 dBμV
Measurement level resolution .................................................................................................... 0.1 dB
Level measurement accuracy at 23 0C operation temperature ................................................ ±1.5 dB
Level measurement accuracy at rated operating temperature ................................................ ±2.0 dB
Level measurement channel passband ............................................................................. 230 ± 60 kHz
Frequency indication .......................................................................................................... 6 characters
Channel number indication ................................................................................................ 3 characters
Signal level indication......................................................................................................... 4 characters
Digital TV standards ........................................................................................ ITU-T J.83 ANNEX A/B/C
Modulation types ...................................................................................................... QAM 64, 128, 256
Symbol rate ................................................................................................................... 5.0 to 7.2 MSps
MER measurement range ................................................................................................... 28 to 40 dB
MER measurement resolution ..................................................................................................... 0.1 dB
MER measurement accuracy at the digital channel power value not less than 60 dBμV ......... ±2.0 dB
BER measurement range ....................................................................................... 4.0x10-3 to 1.0x10
Digital channel power limit, which provides quasi error-free decoding ................................ 45 dBμV
Automatic frequency adjustment in the digital channel parameters changing mode......... ±0.25 MHz
Warm-up time ....................................................................................................................... 2 minutes
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IT-19C can be powered by:
• AC circuit with 220 ± 22 V voltage, 50 ± 0.5 Hz frequency with no more than 5% harmonic
content, via 12V/1.2A Charger;
• external DC source with 11 to 13 V voltage, and no more than 0.25 V ripple;
• built-in battery.
Current consumed from external power source or battery, not more than ................................. 1.2A
Continuous stable operation under normal conditions
(when powered by external source), not less than ................................................................ 24 hours
Battery life, not less than .......................................................................................................... 5 hours
Dimensions:
- analyzer ............................................................................................................. 193x94x53 mm
- package ........................................................................................................... 255х180х70 mm
Weight:
- analyzer ............................................................................................................................ 0.5 kg
- analyzer in a package ...................................................................................................... 1.0 kg.
2.5 Application Area
IT-19C analyzer can be used when checking and setting the networks of distribution and receiving
the TV and radio broadcasting, individual network elements and other electronic devices. The
Analyzer allows you to measure the voltage level of a radio-frequency signal, parameters of a TV
radio-frequency signal with analog and digital modulation of the DVB-C and J.83 Annex B
standards. The Spectrum measurement mode makes it possible to search for any unwanted signal.
The Analyzer can be used both in laboratory conditions with power supply from an external power
source, and in outdoors being powered by the in-built battery or from the vehicle electrical
system.
3 Preparation for Operation
Perform external examination to make sure your IT-19C has no visible mechanical damage.
Upon the arrival of the package, check the availability of all the items contained in it against the
list provided (Section 2.3).
If the IT-19C has been kept in the environment other than the rated operating conditions, leave
your Analyzer in the environment with normal operating conditions for at least 2 hours before
operation.
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4 Operation Procedure
4.1 Controls and Indicators
The location of controls, indicators and connectors is shown in Figure 1.1.
Functions of the elements are the following:
1) «F1», «F2», «F3» functional keys are designed for enabling the commands
corresponding to the icons displayed on the screen of the Analyzer;
2) The « » key allows you to go to the previous level of the menu;
3) The « » key is used to confirm the command;
4) « », « », «◄» and «►» arrows allow editing in the current operation mode;
5) The « » key provides additional features;
6) The « » key turns the Analyzer on and off;
7) The « 12V DC 1.2A» connector provides connection to an external power source;
8) The «USB » connector provides connection to the PC;
9) The «INPUT» connector is designed for the signal input, “F-male”-type connector.
4.2 Preparations for Measurement
Before you operate your IT-19C, make sure to read this Operating Manual carefully, as well as to
inspect the location of the controls and indicators of the Analyzer (Section 4.1).
To prepare your Analyzer for operation with the external power source, do the following:
1) connect the power source to the connector located on the side panel of IT-19C;
2) turn on the power source.
To prepare your IT-19C for operation in stand-alone mode, powered by the battery, press and hold
down « » until the display lights up.
The name and type of the Analyzer will be shown on the screen. After 1 second, either the main
mode-selection menu (main menu) will appear (Figure 4.1), or the last measurement mode used
before turning the power supply off (Section 4.5).
When you first turn on the analyzer, you need to configure the basic operation parameters. To
perform the setting, select the settings tab in the main menu mode using «◄» и «►» and
set the icon in the bottom line of the screen using « » и « ». Press «F1». In the parameter
table that appears, select the required ones in turn and set the parameter values using the «◄»
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and «►». For the proper functioning of the analyzer, the following parameters must be
Channel
TV channel parameter measurement
Scan
Channel level, ripple and tilt measurement
Spectrum
Radio-frequency signal spectrum measurement
configured:
• Language . Used language for user interface. Possible values are: English(USA),
Русский.
• Level units. Level units of measure. Possible values are dBuV, dBmV, dBm.
• Channel template. Channel allocation standard. Possible values are OIRT, CCIR,
Australian, Australian SBAND.
The purpose of the remaining parameters is described in section 4.5. After setting the parameters,
press the «F1/Save» to save the settings or «F3/Cancel» to restore the old values.
4.3 Measurement Procedure
4.3.1 General Information
IT-19C analyzer offers three measurement modes:
Set the icon of the required mode at the bottom of the screen by pressing and in the main
menu (Figure 4.1).
Figure 4.1
Press one of the buttons of the functional group (F1, F2, F3), above which there is the desired icon
for selecting the measurement mode. Return to the selection menu by pressing . For a quick
switch between measurement modes (without entering the menu) press . The line of the
function buttons (F1, F2, F3) will display names of measurement modes on a yellow background.
Click the desired button.
When selecting the measurement mode, the name of the selected channel plan (Section 4.4.2) is
displayed in the status bar for a few seconds.
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