Calian SED Decimator Manuel utilisateur
18 Innovation Boulevard
Saskatoon, Saskatchewan CANADA S7N 3R1
Tel: (306) 931-3425 Fax: (306) 933-1486
www.sedsystems.ca
Decimator Quick Tour
132825
Revision 3
January 26, 2018
Proprietary Notice: The information contained herein is proprietary to SED Systems, and
may not be used, reproduced, or disclosed to others except as specifically permitted in
writing by SED. The recipient of this information, by its retention and use, agrees to protect
the same and the information contained herein from loss, theft, and compromise.
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Contents
Page
1. Introduction ........................................................................................................................ 1
2. Applications........................................................................................................................ 2
3. Setup................................................................................................................................... 3
4. Getting Started Using the Decimator................................................................................ 4
5. Markers ............................................................................................................................... 6
6. Overview ............................................................................................................................. 7
7. Carrier Monitoring.............................................................................................................. 9
8. CarrierWatch..................................................................................................................... 18
9. Save and Restore ............................................................................................................. 23
10. Reporting .......................................................................................................................... 24
11. Cross-Pol Isolation Performance Testing....................................................................... 25
12. Multiuser Support............................................................................................................. 27
13. Conclusion and Contact .................................................................................................. 27
Decimator Quick Tour
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1. Introduction
SED Systems’ Decimator is an L-Band spectrum analyzer that comes in three different form factors:
Decimator Card, 4/8 Port Decimator rack-mount unit and Portable Decimator, as shown in Figure 1.
Decimator Card
4-Port / 8-Port Decimator
Portable Decimator
Figure 1Decimator Form Factors
The intention of this document is to take you through a tour of the main uses and features of the
Decimator:
●Applications
●Setup
●Getting Started
●Markers
●Overview
●Carrier Monitoring
●CarrierWatch
●Save and Restore
●Reporting
●Cross-Pol Isolation Testing
●Multi-user Support
You will be up and running very quickly, to see the ease of use, that provides instant productivity
using a cost effective solution, resulting in great ROI. As we walk you through the tour, we will
keep track of the time elapsed to give you an indication of how efficient you can be using
Decimator. It will take about 20 minutes to read through the document, and 45 minutes if you want
to follow along and perform all the operations with an actual Decimator.
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2. Applications
Depending on which model you use, the application and setup of the Decimator is slightly different.
The Decimator Card can be installed in computer’s PCIe slot, or it can be integrated into another
product or system by mounting it on standoffs and powering it from an on-board 3- pin Molex
connector. The Portable Decimator is the Decimator Card in a small enclosure, making it an ideal
solution when you need a portable spectrum analyzer, as it easily fits into a laptop case. The 4-Port
or 8-Port Decimator is a 1U rack-mount unit that is well-suited to installation in a teleport, earth
station or broadcast facility for either local or remote monitoring. Both the Portable and 4/8 Port
Decimators are powered from an external AC power source. The Decimator card and Portable
products provide an SMA RF input while for the multiport Decimator, RF signals are connected to
either a 50Ω SMA or 75Ω F-Type connector. All data communications between Decimator and the
controlling computer is via an Ethernet port.
Some typical applications, like the Decimator Spectrum Analyzer UI and the Decimator Carrier
Monitoring Software both communicate to the Decimator Card and the 4/8-Port Decimator are
shown in Figure 2. You can write your own custom Software to communicate with the Decimator
Card using an API.
Figure 2Decimator Applications
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3. Setup
We will focus our attention on using a 4-Port Decimator for simplicity, but all Decimator products
operate basically the same way. Follow these steps to setup the Decimator:
●Unpack the Decimator.
●Connect your RF feed to port 1 of the 4-Port Decimator.
●Connect a LAN cable between the Decimator and your network.
●Connect the power supply.
●Power up the Decimator and wait for a minute to let the unit boot.
●Open a browser window on a computer on the network and enter the IP Address of the
Decimator.
●The main Decimator UI is displayed in the browser as shown in Figure 3 with no need
to install any local software!
Figure 3Main Decimator UI Screen
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4. Getting Started Using the Decimator
The Decimator can be controlled remotely using the provided TCP-IP ASCII based API so that you
can integrate it into your NMS to measure a particular carrier(s), or you can use it interactively via
the web interface. We will focus our attention on using the web interface to give you a tour of the
rich features of the Decimator. The first thing you will notice about the UI as shown in Figure 3 is
that it looks like a spectrum analyzer front panel. Just wait, it feels like one too! This intuitive
design allows you to use it right out of the box, without reading the manual.
By default, the Decimator is centered at 1550.0 MHz. Let’s center the display on a carrier at 1400.0
MHz. Click the Center Frequency menu item and enter 1400 on the dialog. Click OK. You could
also use the scroll wheel on your mouse to accomplish the same thing.
Figure 4Setting Center Frequency
Let’s change the Span to zoom out to a better carrier width by setting the Span to 30 MHz. Click the
SPAN button, then the Span menu item, enter 30, keeping the units MHz and click OK.
Figure 5Setting Span
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You have now locked the display into the carrier of interest by setting the Center Frequency and
Span. There are many other settings that can be tuned, such as Number of Averages, RBW and
more. In this case, the Number of Averages was increased from 5 to 20, to produce a display for the
given modulated carrier, like that in Figure 6.
Figure 6Modulated Carrier
Total Elapsed Time: 7 minutes
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5. Markers
Of course we need to see more information about the carrier. Let’s add a marker. Click the
MARKERS button and then the Marker 1 menu item. A single marker is added at mid span with the
frequency and power shown in the Marker Legend at the bottom. Let’s move the marker to the
peak. Click the Function menu item and select Peak Search. The peak power value is shown in
Figure 7 in the Marker Legend at -57.51 dBm.
Figure 7Normal Markers
This example showed use of individual markers, but the markers can also be used in delta mode,
which will allow you to determine the total power in a modulated carrier, by placing one marker on
either side of the carrier. This is explained in more detail in the Carrier Monitoring section.
Total Elapsed Time: 9 minutes
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6. Overview
Setting the Center Frequency and Span using the menu buttons above is the traditional way to view
carriers. Let’s turn on the Overview Bar, which shows a trace of the full span to help navigate
around our spectrum. Click the OVERVIEW button, and turn the Overview Mode on by toggling it
“On” in the first menu item. The Overview Bar is shown at the bottom of Figure 8.
Figure 8Overview Bar
Notice that our modulated carrier is selected with the blue background at 1400 MHz. There appears
to be 3 other carriers present that we will have a look at in the next section, Carrier Monitoring. The
Overview Bar full span trace can be refreshed on demand at any time by clicking the Refresh button
to the left of the Overview Bar or in the OVERVIEW menu.
Mouse input changes to the Overview Bar will drive changes to the Center Frequency and possibly
Span in the plot area above. Left clicking anywhere in the Overview Bar specifies a new Center
Frequency, or if you like, dragging the blue selection bar, as shown in Figure 9, does the same thing.
Figure 9Overview Bar Drag Selected Span
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The Center Frequency preview value is shown while dragging so you know where you will end up
after you complete the operation. The 2 new span boundary line previews are also displayed while
dragging.
You can reposition one of the edge frequencies by dragging it to the left or right, which will specify
a new Center Frequency and Span. In this case, both the Center Frequency and Edge Frequency are
depicted while dragging along with the span boundary line previews. This is shown in Figure 10.
Figure 10 Overview Bar Drag Left Edge of Span
Spectrum navigation has never been easier. That’s like putting on your Spectrum Analysis glasses
when you didn’t know you need them!
Total Elapsed Time: 10 minutes
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