Atec Wavetek-SDA-5000-5500-5510 - Manual (Page 5)

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Comprehensive Testing
The SDA provides an extensive set of signal analysis fea-
tures designed for proving, and improving, network quality.
All tests utilize a practical user interface, normally requiring
only the push of a button.
Level Measurement
The SDA instruments have a comprehensive single-channel
level display that indicates tuned channel, video frequency
and level, audio frequency and level, and the difference
between video and audio carrier levels.
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Making accurate digital average power measurements is
addressed with the digiCheck measurement function. The
digiCheck feature is compatible with most "non-bursty"
digital modulations in use today (i.e., 16, 32, 64, and 256
QAM, QPR, QPSK, VSB, CAP16, etc.).
Analog and Digital Signal Limits
Analog signal threshold limits have always been a techni-
cian’s favorite feature of Acterna instruments. Automatic
limit checks provide a quick go/no-go status for audio and
video levels. The SDA series extends this capability with a
dedicated digital limit set that can be applied exclusively to
the forward digital carriers defined in a channel plan. By
assigning separate analog and digital limits, test time is
reduced since no calculation is necessary to determine if
analog and digital level relationships are within system
specifications. Analog and digital limit capability is avail-
able in both the Scan and Autotest modes.
Tilt Measurement
Tilt is the easiest and most efficient tool for balancing
amplifiers. For cable plants requiring multiple tilt measure-
ments, such as comparing today’s tilt measurement with a
historical record and then taking an additional measure-
ment for a new wider channel plan, the technician simply
uses markers to indicate the tilt channels that define the
new limits.
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The CTB/CSO mode is used for automatically
making intermodulation measurements.
Scan Measurement
Scan mode provides a quick graphical view of the entire
channel plan with bars representing the video level for each
channel. Both video and audio may be displayed.
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