H30EVOLUTION handheld DVB meter /
Analyzer
16
(powering), and DiSEqC. In addition, a SCR
icon will be shown in the bar at the top (SCR3)
to indicate thar the slot is enabled.
While the slot is enabled, all the setting
changes of the meter, will be applied to the
currently slot (SCR3).
- Ref. Level:
Select the reference level of the
bar graph.
- Channels:
Select the number of channels as
well as the channels from the channel plan.
6. Learning plan
Analyzes the input signal to the meter and
automatically detects all channels.
This feature automatically identifies the channels
as either analog or digital and performs
measurements on each.
A bar graph is displayed with the height
representing the power for digital channels and the
level of the video carrier for the analog channels.
The measurements made for analog channels are
video carrier level and V/A. For digital channels the
measurements are power and C/N.
The analog channels will have an extra, smaller
white bar indicating the level of the audio carrier.
6.1. Main window
Below is a capture of a Learning Plan window with
a brief explanation of its features:
List of measurements
with pass/fail indicators
Bar graph representing
found channels
Color according to
checkmarks
Indicates that the
scan is finished.
Press
to save
the plan
Selected channel
Change using
7. Constellation
Digital video often does not show signal
impairment until it is too late due to the small
margin between acceptable quality and failure.
Constellation diagrams are an indispensable tool
to help detect the presence of noise, phase jitter,
interference, and gain compression, all of which
impact overall signal quality and thus reduce
Modulation Error Ratio (MER).
Ideally, each of the symbols in a constellation
diagram should display a clean dot indicating a
perfect signal.
The
H30Evolution
’s real time constellation, allows
the installer to assess the size and shape of the build
up of dots indicative of problems which contribute
to bit errors leading to service disruption
7.1. Main window
Below is a capture of a Constellation window with
a brief explanation of its features:
Summary of Contents for 593501
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