4
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 .
