Deviser DS2831 - Chapter 1: General Information; About the DS2831 Digital TV Spectrum Analyzer

Part I: DS2831 Basics
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Chapter 1: General Information
The DS2831 is a Digital TV spectrum analyzer that integrates multiple measurement applications in a single
instrument, ideal for use by CATV field technicians and HE engineers.
The firmware installed on the DS2831 is updated on a regular basis. This User Guide describes procedures for
operating the instrument, based on the most recent firmware version up to the date listed on the guide.
1-1 About the DS2831 Digital TV Spectrum Analyzer
With the latest in RF test and measurement technology, this DS2831 spectrum analyzer includes a host of
features typically found in more expensive instruments and provides outstanding performance for value.
The RF front end of this true spectrum analyzer offers a dynamic range of 80dB @ 30kHz RBW.
The state-of-the-art cable modem supports DOCSIS 3.1 measurements; in addition to standard SCQAM
capabilities (32 downstream carriers, 8 upstream carriers), the DS2831 now offers OFDM demodulation for
downstream channels up to 192 MHz wide and upstream channels either 48 or 96 MHz wide.
The DS2831 adds a capacitive LCD touchscreen and a host of crucial functions, enabling field engineers to
perform in-service measurements and identify interference signals that are invisible to many field analyzers
currently available on the RF test equipment market. Spectrum & QAM analyses are shown simultaneously,
allowing the user to verify analog / digital characteristics of the same carrier at the same time. With the
upstream spectrum analysis tool, users can perform persistence tests (up to a span of 206MHz) to find
intermittent impairments that traditional spectrum analyzers fail to see.
Gated C/N, CSO, and CTB measurements, triggering on VITS test signals, allow for non-interfering in-service
basic CATV channel tests. By using the appropriate VITS test signal on a specific video line, the DS2831 can
also perform video parameter measurements such as differential gain/phase – which the FCC requires to
be tested every 3 years. With the advent of LTE interference ingress signals, the DS2831’s EVS (Error Vector
Spectrum) Frequency or Time function enables non-interfering tests “under the QAM signal”.
As another example of the DS2831’s exceptional versatility, it also supports MPEG TS (transport stream)
analysis. This function provides the MPEG program information and channel frequency list – so that, when
attempting to troubleshoot, a field engineer can easily identify the QAM carrier of interest based on the
particular program complaint from the customer. When used in conjunction with the DS1610 broadband
network monitoring system, the instrument can also capture a sweep response trace of the upstream path.
The DS2831 is supported by the cloud-based Deviser EDGE platform for asset & data management.
Each instrument comes with Measurement, Constellation, Spectrum, Tilt, Scan, and Mini-Scan downstream
functions, and Cable Modem, Spectrum, Ping, FTP, Traceroute, PPPoE, and Browser modes. Optional tools
may be enabled either at the time of purchase, or at a later date as your test needs evolve.
•
I
n
-
service C/N, CSO, and CTB gated
testing
•
Data management
app, Deviser EDGE
•
Supports optical fiber tools,
such as
power
meter, fault locator, & inspection probe
•
EVS: in
-
service interference location
under a QAM carrier (e.g. LTE)
•
Analog TV
video gated measurement
•
TR 101 290 monitoring
•
Upstream spectrum persistence analysis
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Reverse path sweep
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Wi
-
Fi measurements
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Analog CATV measurement suite
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Upstream signal generator (up to QAM256)
•
32x8 cable modem with OFDM