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WWG SDA-5000
Getting Started with
The New SDA
Stealth Digital Analyzer
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GETTING STARTED WITH THE
NEW STEALTH DIGITAL ANALYZER (SDA)
Table of Contents
Stealth to SDA Series Replacement Guide
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1
Stealth Versus SDA Sweep Compatibility
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1
Functional Differences Between the Stealth and SDA
.....................................
SDA-5500 Sweep Set-Up
.....................................
SDA-5000 Test Point Compensation / Reverse
Sweep Level
.....................................
Reverse Compensation and Reverse
Sweep / Telemetry Levels
.....................................
Reverse Compensation Information Screen
.....................................
Forward Compensation
.....................................
Saving Test Point Compensation Files
.....................................
page 1
page 1
page 1
page 1
page 2
page 2
page 2
New Features on the SDA Series Meters
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2
SDA-5000 (with OPT. 1) CW Loopback
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2
SDA-5000 (with OPT. 2) Loopback Sweep
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3
Digital Carriers - Automatic Center Frequency Default
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3
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Stealth / SDA Replacement
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Step 1. To begin sweep configuration of the SDA transmitter,
The following chart shows the SDA replacements for current
Stealth meters.
Stealth Model
3ST
3HRV
3SR
3SRV option
3SRT option
PathTrak Field View Option
SDA Replacement
SDA-5500
SDA-5510
SDA-5000
Option #1 SDA-5000
Option #2 SDA-5000
Option #3 SDA-5000
Stealth and SDA Sweep Compatibility
Your new SDA meter is fully forward and reverse sweep compatible with older Stealth units! For example, an SDA-5500
Sweep Transceiver (replaces the 3ST) will operate as normal
with your existing 3SR, 3SRV, 3SRT, 3HRV or StealthTrak SSA1000. Alternatively, your 3ST will operate with the new SDA5000 series (replaces the 3SR and SSA-1000). The reverse
sweep operates in the same manner with all Stealth or SDA
field instruments whether you are using the 3HRV or it’s
replacement, the SDA-5510 Reverse Sweep Manager.
The only requirement for backwards compatibility is that the
3ST and 3HRV must have at least firmware version 9.3
installed. This firmware upgrade is free from the WWG web site.
select the front panel Navigator key (Figure 1).
Step 2. Select SWEEP in the CONFIGURE menu (Figure 2).
Step 3. Select TRANSMIT in the SWEEP MODE if all field
technicians in your system are not using SDA-5000
sweep receivers (Figure 3). By selecting TRANSMIT
mode, all Stealth models (3Sx, SSA-1000) and the
SDA-5000 are compatible with the SDA-5500. The
sweep speed is the same as the Stealth sweep using
firmware version 9.3. Your sweep channel plan
should be configured as used in the model 3ST.
Step 4. Select TRANSMIT (SDA COMPATIBLE) if all field
technicians are using SDA-5000 field receivers
(Figure 4). This selection provides greater forward
sweep speed when compared to the 3ST, especially
when operating with a channel plan that includes
multiple scrambled and digital signal types. By the
way, when constructing a sweep channel plan and
using the SDA compatible mode, you may now reference 64/256 QAM digital carriers as you would an
analog video or scrambled channel. Remember, the
Transmit (SDA Compatible) mode should only be
used if all field sweep technicians have meters that
are upgraded to the SDA series.
To take advantage of the new digital compatible forward
sweep, all field and rack mount instruments must be SDA
series and the transmitter/receivers programmed for Stealth
(SDA Compatible) sweep.
Figure 1
Note: When configuring your SDA instruments for forward or
reverse sweeping, make sure that STEALTH SWEEP is
selected in SWEEP MODE unless all instruments in
your system are SDA series!
Functionality Variations Between
the Stealth and SDA
The new SDA user interface is nearly identical to the
Stealth series, and all of the same features found on the
Stealth are included on the SDA. What you will immediately
notice is the NAVIGATOR menu is now standard on all
instruments, providing the same consistent "feel" from
meter to meter. You will also see some improvements in
the Test Point Compensation set-up and sweep transmitter
configuration. Best of all, you’ll see new features like digital
compatible forward sweep and a valuable Loopback feature
for in-field component troubleshooting.
SDA-5500 versus 3ST Sweep Configuration
Sweep configuration of the SDA-5500 is much the same as the
3ST. The primary differences are: 1) the Navigator replaces the
3ST SET-UP screen, and 2) there is an additional TRANSMIT
selection for Stealth Sweep or SDA Sweep. The following
instructional sequence will guide you through these differences.
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Figure 2
Figure 3
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SDA-5000 Test Point Compensation / Reverse
Level Configuration
A new graphical user interface has been added to simplify
programming of the forward and reverse test point compensation. Test point compensation can be accessed by either
sequentially pressing the FUNCTION (green) and 7 keys, or
selecting the TEST POINT icon in the NAVIGATOR menu.
Figure 6
Reverse Compensation and Reverse Sweep / Telemetry Levels
Reverse test point compensation values and reverse telemetry and sweep level values are now programmed from the
same screen (Figure 5). Losses internal or external to the
device under test may be entered.
Figure 7
The reverse telemetry level and sweep levels are also entered
on the reverse compensation screen. When adjusting the levels please note the following program sequence:
•
•
•
Entering the telemetry value will change the sweep value
to same level. That is, the sweep value will always "track"
the telemetry value unless the sweep value is changed
independently. This feature was implemented since both
telemetry values and sweep values are the same under
most circumstances.
If the device being tested requires different values for
telemetry and sweep, simply enter the desired telemetry
value first, followed by the sweep value.
Always remember to enter the desired level that you
want injected to the device under test. The user will be
warned if the desired input level is not achievable given
the test point compensation values (transmitter output
is adjustable from +20 to +50 dBmV).
Reverse Compensation Information Screen
The reverse compensation information screen provides additional detail to the reverse TP set-up screen (Figure 6).
Information includes the transmitted output level from the
SDA-5000, and the actual level at the device under test.
•
Please note the REVERSE TELEMETRY FREQUENCY
header at the top of Figure 6. This reference frequency
that appears in the header is actually programmed in the
3ST, 3HRV, SDA-5500 or SDA-5510, but is displayed after
you perform the first reverse sweep. Therefore, the
default frequency will always be 40 MHz until you perform a reverse sweep, and then this frequency will
change depending on what frequency was programmed
in the headend unit.
Forward Compensation
Forward Path external and probe compensation values are
also programmed in the testpoint compensation screen
(Figure 7).
Saving Test Point Compensation Files
Test point screens can now be saved by sequentially pressing
the FUNCTION (green) key and #2 key. Common test point
configurations can be saved with a descriptive name of the
node type, amplifier type or location. The files can then be
recalled and applied to the appropriate device under test.
NEW FEATURES ON THE SDA SERIES METERS
SDA-5000 (with OPT. 1) CW Loopback
CW Loopback allows the user to generate and receive a single
CW frequency using one unit (Figure 8). Connect the output
(opt. port) of the SDA-5000 to the input of the device under
test (DUT), and connect the SDA receiver input to the output
of the DUT. The CW Loopback measurement can be accessed
by selecting the LOOPBACK icon in the NAVIGATOR mode
(Figure 9).
•
This feature is ideal for simple troubleshooting of a field
active/passive device to determine gain, loss or continuity. Any frequency from 5-1000 MHz can be selected, and
the output is adjustable from +20 to +50 dBmV.
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•
•
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Inc. for Sweep
The transmitter is
the maximum
output of
+50 dBmV
• A dedicated
channelServices
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the transmitLoopback, and building the plan is similar to building a
ted output level by scaling the attenuator (Figure 10) for
reverse plan (Figure 12). The channel plan is constructed
the desired output level.
by selecting a start / stop frequency and interval between
frequencies. Channel plans may be built from 5-1000
Test point compensation can be enabled, if desired, for
MHz. Channel frequencies may be edited as needed. Tilt
the CW Loopback mode. This mode recognizes the forchannels are enabled at the highest and lowest frequenward test point compensation values, regardless of the
cies built in the plan.
frequency that is being generated. If enabled, the test
point compensation value will be displayed in the lower
*WARNING! TO AVOID INTERFERENCE WITH ACTIVE
left corner of the Loopback display.
SERVICES ON THE CABLE SYSTEM, MAKE SURE THAT
THE LOOPBACK SWEEP TEST IS PERFORMED OUT-OFFigure 8
SERVICE, OR BUILD SWEEP CHANNELS AROUND ANY
ACTIVE SERVICES!
•
After the channel plan is built, select the desired sweep
insertion level into the device being tested (Figure 13).
•
Press the front panel sweep key to begin the Sweep
Loopback measurement. A reference will typically need
to be established to account for any test cable losses or
mismatches. This is accomplished by connecting the test
cables from the SDA-5000 transmitter output (OPT port)
to the input port. Press the FUNCTION key followed by
the #6 key to store a reference (Figure 14).
Figure 9
Note: The level reading is an absolute measurement
(example: dBmV units) prior to establishing a reference. After the reference has been established, the
meter will read in relative units (dB).
•
Figure 10
Connect the transmitter output of the SDA-5000 to the
input of the DUT, and connect the receiver input to the
output of the DUT. In Figure 15, the sweep loopback
measurement is used to check the frequency response of
a line extender.
Figure 11
Loopback Sweep
Transmitting and receiving a sweep signal from a single SDA5000 (OPT. 2 required) meter can be achieved through the
Loopback Sweep mode. The Loopback Sweep mode is an
ideal solution for characterizing frequency response of network active and passive devices.
•
The Loopback Sweep feature is selected in the SWEEP
MODE menu in the SWEEP CONFIGURATION menu
(Figure 11). Cabling the Sweep Loopback is nearly identical
to the CW Loopback. The SDA-5000 transmitter output
(OPT. port) is cabled to the input of the device under test
(DUT). The SDA receiver input is cabled to the DUT output.
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Figure 12
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Figure
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nel to a digital channel. The video frequency is 613.25 MHz,
and the measurement BW is 4 MHz (Figure 16). After converting the channel to a digital carrier, the center frequency is
615.00 MHz, and the measurement bandwidth is 5.6 MHz
(Figure 17).
Figure 16
Figure 14
Figure 17
Figure 15
AUTOMATIC CENTER FREQUENCY DEFAULT –
NTSC DIGITAL CARRIERS
If a digital channel is being enabled in the channel plan editor, please observe that an auto center frequency feature has
been implemented for NTSC channel plans. This feature adds
1.75 MHz to the video frequency of the channel being modified, and the measurement bandwidth now defaults to 5.6
MHz. Adding 1.75 MHz to the video frequency establishes the
center frequency in a standard 6 MHz bandwidth. The user
should always verify the 5.6 MHz measurement bandwidth
with the system operator, and adjust as needed.
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OTHER NEW STEALTH DIGITAL ANALYZER
(SDA) LITERATURE:
SDA-5000 Data Sheet
SDA-4040D Data Sheet
SDA Family Color Sell
Wavelengths Newsletter, January 2000 issue
SDA-5000 Sweep Training CD-ROM
SDA Product Poster
SDA-5000 & 4040D PR Photographs
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Wavetek Wandel Goltermann Sales Offices
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Internet Address
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P.O. Box 13585
Research Triangle Park, NC
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Tel. +1 919 941-5730
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© 2000 Wavetek Wandel Goltermann, Inc. • Specifications subject to change without notice.
CNIN01650300AE
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