Wavetek | 3ST | Stealth Sweep System DS

Stealth Sweep System
Forward & Reverse Sweep & Signal Analysis
♦ Continuously Referenced,
Non-Interfering Sweep
Frequency Response
♦ 5 MHz to 1 GHz Frequency
♦ Easy to Read Graphic Signal
Level Measurement; High
Resolution LCD (320 x 240
dot matrix)
♦ Durable, Water Resistant
Receiver can be Used in Rain
♦ Excellent Level Accuracy over
a Wide Temperature Range
♦ Broad Scope of Measurement
♦ Spectrum Analyzer Display
♦ Automated 24 Hour FCC
Proof Measurements
♦ Digital QAM Carrier Average
Power Measurement Option
Reverse Sweep Option (3SRV)
♦ Reverse Sweep Transmitter
Built Into Hand-Held Sweep
♦ Enables Simple Bi-Directional
Alignment by One Man, Using
One Hand-Held Instrument
♦ Reverse Noise Feature Helps
Troubleshoot Reverse Path
Noise and Ingross Problems
Hand-Held Transmitter Option (3SRT)
♦ Full Transmit, Receive and
Reverse Sweep Capability
♦ Useful in Sweep-From-Node
♦ Used to Isolate Specific
Portions of Plant for Testing
♦ Can be Used to Test Cable
Insertion and Structural Return
Loss in the Field
he Stealth Sweep System is a
comprehensive measurement tool
designed for testing a wide range
of critical parameters for proving
system performance and conducting
preventative maintenance. Users can
test frequency response, signal levels,
C/N, hum, depth of modulation,
CSO/CTB and intermodulation
distortion. These levels can be
displayed in the form of a single
channel with both video and audio
levels shown graphically and
numerically, in a tilt mode with up to
nine channels displayed on a bar
graph, or in a scan mode with all of
the channels (including video and
audio carriers) displayed. A spectrum
display provides a means of checking
distortion and ingress.
Tough, Weatherproof Hand-Held Tool
The 3SR Receiver (Stealth System
Sweep Receiver) is very small and
lightweight, but there's no shortcut on
its measurement capability or its
means of display.
The 3SR Receiver’s high resolution
display (320 X 240 Dot Matrix LCD)
presents extensive measurement
information simultaneously.
Along with its high accuracy and
precision, the 3SR Receiver is tough
and durable — made for use in field
conditions. No waiting for the rain to
stop before making measurements —
the 3SR Receiver is a reliable partner,
ready when you are.
Non-Interfering, Continuously
Referenced Sweep
The 3SR Receiver references
existing carriers when possible, and
the 3ST Transmitter (Stealth System
Sweep Transmitter) transmits a
sweep to fill vacant spectrum areas.
To avoid headend level drift or
adjustment from affecting the sweep
response, the 3ST Transmitter
monitors the levels and transmits new
reference information with every
sweep. This means if the signal
levels are changing in the headend,
they won’t effect the sweep response
measurement. The 3ST Transmitter
has all of the measurement capability
of the 3SR Receiver, so the Headend
Technician can closely monitor
headend levels.
Stealth Sweep System
Comprehensive Testing
The 3SR Receiver is a full-featured
signal analysis meter with a full
spectrum display and analog representation of single channel
measurement data. When tuned to
a channel, comprehensive information is provided: tuned channel,
video frequency and level, audio
frequency and level, the difference
between video and audio carrier
levels and battery charge condition.
Measuring hum on a channel is
as simple as pressing the “HUM”
key. A CW carrier is no longer
required, but the channel must not
be scrambled. A carrier-to-noise
measurement is just as simple, and
again, there is no need to remove
modulation from the video carrier.
Digital QAM Carrier Level
This feature permits accurate
average power measurements of
digitally modulated (16 and 64
QAM) carriers. The user simply
specifies that the channel is a
"digital carrier" type in the channel
plan, and then indicates the
bandwidth of the carrier to be
measured. When a digital channel
is selected, the instrument automatically switches to an RMS
detection mode, makes and
processes the measurement and
displays the result on the LCD.
The levels are displayed in similar
fashion to "single" carrier types.
These screens may be printed
directly, and the levels may be
stored and printed or uploaded to a
PC as part of an Autotest.
Extensive Auto Test Capability
Automated tests can be scheduled
to perform either FCC compliance
tests, or they can be initiated
immediately in order to log
performance at individual nodes,
amplifiers, or other test points.
A wide range of tests can be
performed automatically, including
signal levels, C/N, hum and depth
of modulation. Providing
unprecedented flexibility, the
Stealth enables the operator to
designate which tests to perform on
which channels. Because tests are
non-intrusive, it’s no problem to
test all parameters on all channels.
After a test is performed, results
can be displayed on the Stealth
screen with a pass/fail indication on
a variety of limits. Limits can be
set for FCC or other government
standards, or to system preferences.
Data taken during any automated
test, or sequence of automated
tests, can be viewed with a pass/fail
indication for each of the limits,
and the operator can scroll through
the stored data to look at specific
measurement results. Automated
test results can be printed directly
to a printer or uploaded to a PC
using StealthWare to store and
manage the data or format reports.
Informative Tilt Display
Before initiating a sweep at a
specific amplifier test point, the
technician typically balances the
pilot levels. The “tilt” mode
simplifies this step by displaying a
bar graph with up to nine different user-selected video carrier
levels represented. The levels of
high and low pilots are shown,
along with the difference between
these carrier levels. From this
mode, the operator can quickly
switch to sweep by pressing the
“sweep” key.
Channel Scan Mode
To get a quick look at absolute
carrier levels, the “scan” mode is
used. A bar graph showing all
carrier levels is displayed. A
marker selects which of the
carrier's level is displayed on the
bottom of the screen. Pressing
the “level” key quickly changes
the mode to show more detailed
measurement information about
the marked channel.
A “scan limits” feature enables
a quick Go/No-Go test based on
user-defined limits for minimum
video carrier levels, maximum and
minimum difference between
video and audio carrier levels,
maximum level difference between adjacent video carriers, and
maximum level difference over
the entire band. This allows the
operator to quickly check to make
sure the subscriber drop is within
FCC specifications before initiating the 24 hour test.
In-Service C/N Measurement
Video Depth of Modulation
To receive a C/N measurement
simply press the “C/N” key. The
C/N ratio of the last tuned channel
will be displayed, along with the
noise measurement frequency and
bandwidth. The C/N measurement bandwidth and the frequency
offset for the noise measurement
may be controlled from the measurement screen.
The video depth of modulation
screen provides percent modulation
in both graphical and precise
numeric format. This feature on
the model 3ST makes it easy for
the headend technician to do a
quick check-up on modulation
depth without having to set up
special equipment.
Sweep Display
The Stealth sweep method is fast,
accurate, and non-interfering. The
levels are measured and stored at a
reference point (headend, hub site,
or first amplifier) and then compared on a sweep display at subsequent test points.
The Stealth System Sweep
automatically searches for a quiet
line in the vertical interval and
acquires the noise measurement
during that line. Preselection is not
required for up to 78 channels at a
+10 dBmV input level.
In-Service Hum Measurement
Dynamic nonvolatile memory
enables the storage of at least 50
sweep traces for later viewing and
at least 16 references may be
stored, enabling the operator to test
the response from any specific
point in the system (bridger, fiber
node, splitter, etc.).
A tilt compensation feature
enables consistent measurement
accuracy when specified tilt
changes in the system, eliminating
the need to store a new reference.
For a hum measurement simply
press the “hum” key. The hum
modulation of the last tuned channel
will be displayed in either % or dB,
as selected by the operator. Soft
keys allow the selection of 60, 120
(50 or 100 for PAL systems) or
<1,000 Hz filters for help in
troubleshooting. Stealth’s hum
measurement tech-nique permits
testing modulated carriers.
Spectrum Analyzer Display
Stealth’s spectrum analyzer display
provides a view of the system
spectrum with variable spans from
3 MHz to 50 MHz and a dynamic
range of better that 60 dB. The
“max hold” function ensures that
the highest signal over multiple
sweeps is displayed. The spectrum
analyzer display can even make
FCC in-channel response measurements. Composite second order
and composite third order intermodulation distortion tests are
simplified with user prompted
automated measurement processes.
Preselection is required for accuracy in this measurement.
CSO and CTB Display
Data Analysis and Management
With StealthWare
Any stored Stealth measurement
information can be uploaded to a
PC using StealthWare, a
Windows™ based data
management package. Stored
sweep, scan, or spectrum screens
can be viewed on the PC and
analyzed with marker movement
and readout information just as on
the actual unit. StealthWare allows
the operator to build channel plans
and edit site locations which can
then be downloaded to multiple
Stealth instruments. Additionally,
channel plans can be uploaded to
the PC, modified in StealthWare,
and then downloaded back to the
Stealth instrument.
Forward (outbound) and reverse
(inbound) path alignment can be
done simultaneously by one
person. The operator simply
indicates which screen to be
viewed, one being the response
from the headend to the test point,
the other being the response from
the test point to the headend.
There is a contention mechanism
in place that permits multiple
users to perform forward and
reverse alignment.
Because the reverse sweep
consists of only inserted sweep
signals, and the bandwidth is
typically relatively narrow (5 to 30
MHz), the sweep update is
remarkably quick.
Reverse Noise
There are two key requirements
to ensuring the proper operation of
the reverse path. One is that the
amplifiers be properly aligned to
ensure that the digital signals are
not clipped or compressed. The
other is to maintain a proper
carrier-to-noise and carrier-toingress ratio.
Reverse Sweep Option
A Stealth Sweep System
configured with a Reverse Sweep
(3SRV) option allows simple,
practical testing of the frequency
response of the reverse path,
regardless of the frequency passband (5 to 1,000 MHz range). No
special pilot modules are required,
as the 3ST transmitter and the
3SR receiver have frequency agile
telemetry and can be configured to
communicate on both the forward
and reverse paths.
The Reverse Noise feature of
the 3SRV option enables a quick
swept noise test at the reverse
sweep point frequencies. The
operator simply presses the
“Noise” soft key while sweeping
reverse, and the display changes to
a noise response indicating the
noise level at the reverse sweep
insertion frequencies. This
provides for simple, comprehensive
testing of both amplifier alignment
and C/N in the headend based on
the signal injected at a specific test
Portable Transmitter Option
The Model 3SR with a 3SRT
option provides a flexible, portable
solution for testing particular
segments of a network. It is also a
convenient problem solver for the
contractor who may not have ready
access to the headend, or who
wants to be ready for anything
This hand-held instrument not
only receives sweep and performs
the reverse sweep, but it can be
configured to operate exactly like
the 19" rack-mounted Model 3ST
Transmitter. Applications for this
include situations where it might
be desirable to test a specific
portion of the plant, while
remaining unconnected to the
headend. This might occur in new
or rebuild cases in which physical
or bureaucratic barriers impede
connection to the headend. The
3SRT is also useful in construction
situations where it is desirable to
sweep cable prior to the
installation of active components.
Stealth Sweep System
Reverse Option Transmitter Output Level:
+10 to +40 dBmV, settable in 2 dB increments
Range: 5 to 1,000 MHz
Accuracy: ± 10 ppm at 25°C; ± 10 ppm drift
over temp.; ± 3 ppm/year aging
Resolution Bandwidths: 30 and 280 kHz
(30 kHz for CTB/CSO only)
Tuning Resolutions: 10 kHz
Sweep Resolution: 250 kHz maximum
Level Measurement
Range: -40 to +60 dBmV
Resolution: 0.1 dB
Accuracy: ± 1.0 dB from -20 to +50°C 1, 2
16/64 QAM Digital Carrier Power
Measurement Option: ±1.8 dB @ 25° C
Hum Measurement
Carrier level must be ≥ -0 dBmV.
Non-scrambled channels only.
Range: 0 to 10%
Resolution: < 0.2%
Accuracy: ± 0.7%
Frequency Range: 5 to 1,000 MHz
Level Range: +10 to +40 dBmV; settable in
2 dB increments
Spectral Purity: Hars -30 dBc; Spurs -35 dBc
Frequency: User defined, 5 to 1,000 MHz
Modulation: FSK 100 kHz deviation
Spectrum Required: ≈1 MHz recommended
Spectrum Mode
Spans: 3, 5, 10, 20, and 50 MHz
(0.5, 1, 2, and 5 MHz/div)
Sweep Rates: 2 seconds (50 & 5 MHz)
Display Scaling and Range: 0.5, 1, 2, 5, and
10 dB/division; 6 vertical divisions
Spurious Free Dynamic Range: 60 dB 1
Intermodulation Distortion
Range: 60 dB maximum
Resolution: 1dB
Carrier to Noise Measurement
Non-scrambled channels only. No preselection
required for 78 channels at +10 dBmV input level.
Range: 52 dB maximum
Resolution: 0.5 dB
3SR Receiver: 1.95 kg (4.3 lbs.)
3ST Transmitter: 6.8 kg (15 lbs.)
3SR w/3SRV or 3SRT option: 2.2 kg (4.9 lbs.)
Operating Temperature Range:
3SR Receiver: -20 to +50°C; 0 to 120°F
3ST Transmitter: 0 to +50°C; .32 to 120°F
3SR w/Reverse Sweep Option: -20 to +47°C;
-4 to +117°F
3SRT: -20 to +45°C; -4 to 113°F
Model 3SR Battery Life:
2.5 hours continuous (absolute worst case),
replaceable battery cartridge
Model 3SR w/3SRV or 3SRT Option:
1.75 hours continuous (absolute worst case)
Model 3SR Charge Time:
4 hours fast charge; 30 hour slow charge
(with unit operating)
Model 3ST:
47 to 63 Hz ~ 100 VA; 100 to 265 VAC
Ordering Information
Model 3SR Receiver Includes a durable
canvas carrying case, a battery charger/AC
adapter, one spare battery, and two spare "F"
type input connectors.
Model 3ST Transmitter Includes a line cord
and a channel plan transfer cable.
Depth of Modulation
Assumes presence of white reference on any VITS
line. Non-scrambled channels only.
Range: 80 to 100%
Resolution: < 0.5% at 85%
Frequency Response
Frequency Range: 5 to 1,000 MHz
(Forward or Reverse)
Sweep Rate: 3SRT ≅ 1 second for 600 MHz
sweep, no scrambled channels
Accuracy: ± 0.5 dB, normalized (dependent
on stability of referenced carriers)
Display Scaling and Range:
1, 2, 5, and 10 dB/division; 6 vertical divisions
Sweep Span: User definable from 5 to 1,000 MHz
Reference Storage: At least 16, including
Forward, Reverse, or Sweepless
Sweep Trace Storage: At least 50,
including Forward, Reverse, or Sweepless
Serial Interface
RS232; Epson, IBM Printers
Log Linearity: ± 0.5 dB 1
Flatness: ± 0.5 dB 3
3SR Receiver:
15.2 cm (W) x 25.4 cm (H) x 5.1 cm (D)
6" (W) x 10" (H) x 2" (D)
3ST Transmitter:
48.3 cm (W) x 13.3 cm (H) x 35.6 cm (D)
19" (W) x 5.25" (H) x 14" (D)
3SRV Option
Stealth Reverse Sweep Option for 3SR
3SRT Option
Portable, Hand-Held Sweep Transmitter Option
for 3SR
Digital Carrier Level Measurement Option
Windows™ Compatible Data Management
Package for Stealth Products
Optional Accessories
Cigarette lighter adapter
Charger for 1 spare battery cartridge
Charger for up to 6 spare battery cartridges
Stealth Portable Serial Thermal Fusion Printer Kit
(Citizen PN60). Includes cables and adapters
required for printing.
Stealth Sweep System
Worldwide Sales Offices
Wavetek Ges.mbH
Meidlinger Hauptstrasse 46
A-1120 Wien
Tel: 43-1-813-5628
Fax: 43-1-813-2426
Wavetek Corporation
27/F Room GH, CITIC Building
19 Jianguomenwai Dajie
Beijing, 100004
Tel: 86 10 500 2255-2768
Fax: 86 10 500 8199
Wavetek S.A.
34, rue Necker
42000 Saint Etienne Cedex 1
Tel: 33 77 478-900
Fax: 33 77 478-970
A wide variety of options and accessories make the Stealth Sweep System fit every application. Left to
right: StealthWare Data Analysis Software (PC not included), Stealth Soft Carrying Cases, Sweep
Transmitter, P-Stealth Portable Printer, Battery Chargers, Cigaretter Lighter Adapter, Chargers/Adapters,
3SR Sweep Receiver with 3SRT Option, 3SR Sweep Receiver with 3SRV Option, NS-6 Summing Network,
3SR Sweep Receiver, and Stealth Operating Manuals
Stealth Serial Printer Cable (for Kodak/Diconix
printer, 25 pin male connector)
Precision Preselector for Intermodulation Distortion
Testing (55 to 440 MHz)
Tunable Precision Preselector (55 to 110 MHz)
Tunable Precision Preselector (110 to 220 MHz)
Tunable Precision Preselector (220 to 440 MHz)
Tunable Precision Preselector (440 to 880 MHz)
Tunable Precision Preselector (31 to 62 MHz)
Tunable Precision Preselector (62 to 125 MHz)
Tunable Precision Preselector (125 to 250 MHz)
Tunable Precision Preselector (250 to 500 MHz)
3SR Battery Cartridge
Charger/Adapter 120VAC to 18VDC
Charger/Adapter 220VAC to 18VDC
3SR Soft Carrying Case
(included with Model 3SR)
Channel Plan Transfer Cable
(included with Model 3ST)
Stealth Serial Printer Cable
(included with P-Stealth printer)
WAVETEK is a registered trademark of Wavetek Corporation
WindowsTM is a registered trademark of the Microsoft Corporation
Typical Specifications
Relative to 25 ° C
@ 25 ° C, @ 20 dBmV
Specifications are subject to change without notice
Printed in the U.S.A. on recycled paper
 Wavetek Corporation, 1995
Wavetek GmbH
Gutenbergstrasse 2-4
D-85737 Ismaning
Tel: 49-89-99641-0
Fax: 49-89-99641-160
Hong Kong
Wavetek Corporation
Room 3A, HKPC Building
78 Tat Chee Avenue
Kowloon, Hong Kong
Tel: 852-2788 6221
Fax: 852-2788 6220
Wavetek K.K.
4F, Promity Fuchinobe Building
9-15, Kanumadai 1-chrome
Sagamihara-shi, Kanagawa-ken
Tel: 81-427-57-3444
Fax: 81-427-57-5722
Wavetek Asia-Pacific Pte. Ltd.
51 Goldhill Plaza #14-04/05
Singapore 1130
Tel: 65-356-2522
Fax: 65-356-2553
United Kingdom
Wavetek Limited
52 Hurricane Way
Norwich, Norfolk NR6 6JB
Tel: 44-1603-404824
Fax: 44-1603-483670
United States
Wavetek Corporation
5808 Churchman Bypass
Indianapolis, IN 46203-6109
Tel: 1-317-788-9351
Fax: 1-317-782-4607
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