Transcript
DVB-S2 & DVB-S2X Signal Generation in K-Band and Analysis Application Note Products: ı
R&S®BTC
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R&S®FSW
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R&S®SGS
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R&S®SGU
The application note addresses test and measurement possibilities for DVB-S2 and DVB-S2X signals in the Ku & Ka -band. The AN includes detailed description of measurement setups, DVB-S2 and DVB-S2X signal generation, up-conversion and signal quality (Error Vector Magnitude (EVM) and Modulation Error Ratio (MER)) analysis in the Ku & Ka-band using Rohde & Schwarz instruments. This paper is intended towards satellite equipment manufacturers, network operators, government & authorities, CE receiver chip set manufacturers, car manufacturer and automotive infotainment system manufactures.
Note: Please find up to date document on our homepage http://www.rohde-schwarz.com/appnote/1MA273
Application Note M.Naseef, F.Ramian, Y.Shavit 3.2016 – 1MA273_0e
Application Note: DVB-S2 & DVB-S2X Signal Generation in K-Band and Analysis
Table of Contents
Table of Contents Abstract ............................................................................................... 3 1 Evolution of DVB-S2 to DVB-S2X ...................................................... 5 2 Configuring for APSK Measurements ............................................... 6 2.1
Custom Mappings for the Vector Signal Analyzer ...................................................6
2.1.1
Inserting Pattern and Mapping Files in FSW .................................................................6
2.2
Selecting the Right DVB-S2X Mapping Files into FSW ............................................7
3 Signal Generation, Up-conversion to K-band and Measurement ... 9 3.1
Signal Generation Setup using BTC + SGMA Instrument .......................................9
3.2
DVB-S2 Signal Generation in K-band (Parametric Configuration on BTC-GUI) ..10
3.3
DVB-S2X Signal Generation in K-band (Parametric Configuration on BTC-GUI)12
3.4
Additional Features ...................................................................................................16
3.4.1
AWGN Simulation on Up- and Downlink .....................................................................16
3.4.2
Signal Fading Simulation .............................................................................................17
3.4.3
DVB-CID Waveform Generation ..................................................................................18
3.4.4
Satellite Interference Signals .......................................................................................18
3.5
Measurement Setup and Signal Analysis ...............................................................19
3.5.1
Measurement Setup.....................................................................................................19
3.5.2
DVB Signal Analysis Configuration ..............................................................................21
4 Literature ........................................................................................... 28 5 Ordering Information ........................................................................ 29
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Abstract
Abstract The Digital Video Broadcasting (DVB) suite of standards provides methods of communicating data and video signals through different medium including cable, terrestrial, mobile, and satellite. The first DVB System for satellite communication (DVB-S) was adopted in 1994, using QPSK. A second-generation DVB system for satellite communication (data, broadcasting and unicasting) named DVB-S2 was published in 2005 and since then the satellite communication industry has undergone many changes. Emerging technologies such as high efficiency video coding (HEVC), ultra-high definition TV (UHDTV) and high throughput satellite (HTS) require higher data rates. Migration from DVB-S to DVB-S2 meant achieving significantly better performance using the same satellite transponder bandwidth and emitted signal power. The measured DVB-S2 performance gain over DVB-S is around 30% for both, single-carrier and multiple-carrier-per-transponder configurations [1]. This capacity enhancement is a direct result of the higher order modulation (i.e. 16-APSK, 32-APSK) used in DVB-S2 [2]. In 2014, DVB-S2X (extension to DVB-S2) was released. The new standard offers a gain in throughput of up to 20 percent in Direct-To-Home (DTH) networks and 51 percent for other professional applications (such as contribution links or IP-trunking) compared to DVB-S2 [3]. The first generation of satellites operated in the C-band (4-6 GHz) [4]. As satellite applications kept growing, so did the requirement of higher data throughput. The push for higher data rates meant engineering satellite payloads designed to operate in Ku band (10-14 GHz) [4]. However, evolution of satellite applications resulted in "exploding demand" for HD television and higher speed internet, the capacity of Ku -band operation is pushed to the limit. To keep in sync with mainstream economics of scale, communication satellites are evolving towards higher frequency in the Ka-band (18-30 GHz) and “spot-beams” in Ku -band enabled by higher gain antenna on the satellite [4]. Another reason for the industry to adapt to the K aband for High Throughput Satellites (HTS) is the exhaustion of orbital slots for other bands [4]. This application note is intended to address test and measurement possibilities for DVB-S2 and DVB-S2X signals in the Ku & Ka -band. It includes detailed description of measurement setups; DVB-S2 and DVB-S2X signal generation, up-conversion and signal quality (Error Vector Magnitude (EVM) and Modulation Error Ratio (MER)) analysis in the Ku & Ka -band using Rohde & Schwarz instruments. This AN is intended towards satellite component manufacturers, broadcast receiver manufacturers, SatCom terminal receiver manufacturers, network operators, government & authorities, CE receiver chip set manufacturers, car manufacturer, Military satellite or UAV receiver and component manufacturers and automotive infotainment system manufactures.
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Abstract
Abbreviations The following abbreviations are used in this application note for Rohde & Schwarz products: ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪
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The R&S®BTC broadcast test center is referred to as BTC The R&S®FSW signal and spectrum analyzer is referred to as FSW The R&S®SGS100A SGMA RF is referred to as SGS The R&S®SGU SGMA up-converter is referred to as SGU Digital Video Broadcasting - Satellite - Second Generation is referred to as DVB-S2 Extension to Digital Video Broadcasting - Satellite - Second Generation is referred to as DVB-S2X Amplitude Phase Shift Keying is referred to as APSK Very Small Aperture Terminal is referred to as VSAT Digital Satellite News Gathering is referred to as DSNG Direct to Home is referred to as DTH
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Evolution of DVB-S2 to DVB-S2X
1 Evolution of DVB-S2 to DVB-S2X The DVB-S2 specification was introduced in 2005 to address mainly DTH applications. The technical specification of the standard can be found as part 1 of the ESTI EN 302307. Modulation schemes such as 8PSK, 16-Amplitude Phase Shift Keying (APSK) and 32APSK were included in the DVB-S2 standard. Since then multiple new application requirements have generated a buzz in the industry. The core market segments demanding enhancement in performance are Direct to Home (DTH), contribution, VSAT and DSNG [5]. Emerging markets such as Mobile (air, sea and rail) have their eye set on increasing the range of applications [5]. DVB-S2X was introduced as an evolution of the existing DVB-S2 standard to make way for rapid market deployment [5]. The DVB-S2 (EN 302307 [2]) document has been split into two parts. Part 1 describes the original DVB-S2 standard and Part 2 addresses the DVB-S2X extensions [5]. According to definitions, "any DVB-S2X receiver is backwards compatible with the DVB-S2 specifications as the part 1 implementation is mandatory, but legacy DVB-S2 receivers are not forward compatible with the DVB-S2X extensions. Accordingly, the legacy DVB-S2 receivers will not decode transmissions using the new DVB-S2X features, while the new DVB-S2X receivers will decode both DVB-S2X and DVB-S2 transmissions"[5]. DVB-S2X improvements include (i) smaller Roll-Offs (RO), (ii) advanced filtering technologies for improved Carrier Spacing, (iii) support of Different Network Configuration, (iv) increased MODCOD (Modulation and coding) granularity, (v) higher order Modulation Schemes (64/128/256-APSK ), (vi) very low SNR for Mobile Applications, (vii) different classes for linear and non-linear MODCODs, (viii) support of Wideband Signals (up to 72Mbaud), (ix) support of Channel Bonding, (x) additional Standard Scrambling Sequence [3]. A detailed technical description of the DVB-S2X feature extensions can be found in [6]. However, a quick overview of the benefits introduced to the market through the implementation of the DVB-S2X standard are listed below.
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DTH (Direct to Home) applications: A combined implementation of the features offered by DVB-S2X standard signifies an improvement over the pre-existing DVB-S2 standard, in terms efficiency and flexibility. This paves the way for next generation services such as UHDTV [5].
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VSAT applications: Implementation of the Super-Framing structure as specified in Annex E of the DVB-S2X document, make it possible to support Intra-system Interference Mitigation, Beam-Hopping as well as Multi-format Transmission. This opens up the door for greater advancements in the field of interactive broadband networks [5].
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Professional and DSNG (Digital Satellite News Gathering) applications: DVB-S2X introduces a number of higher efficiency modulation schemes (64APSK, 128APSK & 256APSK) in addition to the previous 16APSK and 32APSK. This enables a much optimized satellite capacity usage with spectral efficiency reaching up to 6bps/Hz [5].
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Configuring for APSK Measurements
2 Configuring for APSK Measurements Detailed description of the constellations and bit mapping for DVB-S2 and DVB-S2X can be found in [2] and [6]. In order to perform analysis on DVB-S2 signals on the FSW, the mapping files are already built in the Vector Signal Analysis (FSW-K70) option. However, to analyze DVB-S2X signals, custom mapping and header files currently need to be imported into the FSW-K70. The following sub-sections describe the process of how it is done.
2.1 Custom Mappings for the Vector Signal Analyzer The FSW-K70 option for Rohde & Schwarz signal analyzers provides the possibility for the user to create custom mappings and modulations. The Vector Signal Analyzer mapping file (*.vam) can be imported into the signal analyzer and recalled during vector signal demodulation measurements. Rohde & Schwarz provides a mapping editor called MAPWIZ that can be used to generate any arbitrary mapping. For more details on how to generate custom mapping files and the MAPWIZ tool, please view the MAPWIZ manual. For this Application note, a list of relevant DVB-S2X mapping files are provided in a zip file. Download link: http://www.rohde-schwarz.com/appnote/1MA273
1MA273_DVB-S2X_Mapping_Files.zip
2.1.1 Inserting Pattern and Mapping Files in FSW After FSW boots up, the APSK pattern file needs to be inserted into the VSA pattern folder of the instrument, which is then restarted. A step-by-step instruction is shown below. ı
Switch on the FSW
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Open Windows Explorer terminal on the FSW ▪ ▪ ▪
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Start > Computer On the Search bar > C:\\R_S\Instr\user\vsa\Pattern Press Enter Paste the APSK_Header.XML and the APSK_Header_INV.XML file ▪
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APSK_Header.XML file can be found inside the additional .zip file included with this application note ▪ Incase an inverted I and Q signal is used, select the Swap I/Q ON in the FSW MSRA Master Mode. ▪ Mode > MSRA Master > MEAS > Data Acquisition > Swap I/Q > ON Restart the FSW at this point Rohde & Schwarz DVB-S2 & DVB-S2X Signal Generation in K-Band and Analysis
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Configuring for APSK Measurements
Inserting DVB-S2X mapping files on the FSW ı
Open Windows Explorer terminal on the FSW ▪ ▪ ▪
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Start > Computer On the Search bar > C:\\R_S\Instr\user\vsa\Constellation Press Enter Save a copy of the unzipped 1MA273_DVB_S2X_Mapping_Files
2.2 Selecting the Right DVB-S2X Mapping Files into FSW ı
On the FSW directory: C:\R_S\instr\user\vsa\Constellation\1MA273_DVBS2x_Mapping_Files
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Select a DVB-S2X mapping
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Choose mapping file corresponding to BTC setting (BTC ModCod number) Hint: Sx16_mc373839 means that this is the same mapping for BTC ModCod number 37, 38 and 39 Sx16_mc4041 means that this is the same mapping for BTC ModCod number 40 and 41 Sx16_mc42 means that this is the mapping for BTC ModCod number 42
Example: Sx256_63: ▪ Sx = DVB-S2X constellation ▪ 256 = 256ary ▪ 63 = Num ModCod (RS BTC)
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Configuring for APSK Measurements
The table below shows the BTC ModCod numbers for APSK modulated signals and their corresponding mapping files:
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BTC Mod.Cod Number
Mapping Flies
32: 8APSK 5/9-L Sx
Sx8_mc32.vam
33: 8APSK 26/45-L Sx
Sx8_mc33.vam
37: 16APSK 1 /2-L Sx
Sx16_mc373839.vam
38: 16APSK 8/15-Sx
Sx16_mc373839.vam
39: 16APSK 5/9-L Sx
Sx16_mc373839.vam
40: 16APSK 26/45 Sx
Sx16_mc4041.vam
41: 16APSK 3/5 Sx
Sx16_mc4041.vam
42: 16APSK 3/5 Sx
Sx16_mc42.vam
43: 16APSK 28/45 Sx
Sx16_mc43.vam
44: 16APSK 23/36 Sx
Sx16_mc4446.vam
45: 16APSK 2/3-L Sx
Sx16_mc45.vam
46: 16APSK 25/36 Sx
Sx16_mc4446.vam
47: 16APSK 13/18 Sx
Sx16_mc47.vam
48: 16APSK 7/9 Sx
Sx16_mc48.vam
49: 16APSK 77/90 Sx
Sx16_mc49.vam
50: 32APSK 2/3-L Sx
Sx32_mc50.vam
51: 32APSK 32/45 Sx
Sx32_mc51.vam
52: 32APSK 11/15 Sx
Sx32_mc52.vam
53: 32APSK 7/9 Sx
Sx32_mc53.vam
54: 64APSK 32/45-L Sx
Sx64_mc54.vam
55: 64APSK 11/15 Sx
Sx64_mc55.vam
56: 64APSK 7/9 Sx
Sx64_mc56.vam
57: 64APSK 4/5 Sx
Sx64_mc57.vam
58: 64APSK 5/6 Sx
Sx64_mc58.vam
59: 128APSK 3/4 Sx
Sx128_mc59.vam
60: 128APSK 7/9 Sx
Sx128_mc60.vam
61: 256APSK 29/45-L Sx
Sx256_61.vam
62: 256APSK 2/3 Sx
Sx256_62.vam
63:256 APSK31/45-L Sx
Sx256_63.vam
64: 256APSK 32/45 Sx
Sx256_64.vam
65: 256APSK 11/15-L Sx
Sx256_65.vam
66: 256APSK 3/45 Sx
Sx256_66.vam
77: 16APSK 7/15 Sx
Sx16_mc77.vam
78: 16APSK 8/15 Sx
Sx16_mc78.vam
79: 16APSK 26/45 Sx
Sx16_mc7980.vam
80: 16APSK 3/5 Sx
Sx16_mc7980.vam
81: 16APSK32/45 Sx
Sx16_mc81.vam
82: 32APSK 2/3 Sx
Sx32_mc82.vam
83: 32APSK 32/45 Sx
Sx32_mc83.vam
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Signal Generation, Up-conversion to K-band and Measurement
3 Signal Generation, Up-conversion to Kband and Measurement The BTC alone can generate RF signals up to 6 GHz. For frequencies higher than 6 GHz up to 40 GHz, the SGMA (SGU and SGS) instruments are required to up convert the signal. The BTC also supports third party up-converters.
3.1 Signal Generation Setup using BTC + SGMA Instrument In order to up-convert the DVB-S2 and DVB-S2X signals to the K-band, a combination of the BTC and SGMA (SGS and SGU) equipment is used. RF2
RF1
SGU
SGU LAN
LAN
SGS
PCIe
SGS
PCIe
BTC Q
Q
I
I
Front Panel View
LAN
RF1
LAN
SGU
SGU
SGS
SGS
RF2
BTC
I
Q
I
Q
Back Panel View
Fig. 3-1: Front & Back Panel View of Equipment Connection
Fig. 3-1 shows the front panel view and back panel view for the instrumental connection between BTC and SGMA instruments. 1MA273_0e
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Signal Generation, Up-conversion to K-band and Measurement
3.2 DVB-S2 Signal Generation in K-band (Parametric Configuration on BTC-GUI) This section explains how to generate DVB-S2 Signals and the parametric configuration on the BTC Graphical User Interface (GUI).
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Preset the BTC
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Click on the TX settings box
NOTE: The back button (marked in Blue) on the top right corner is used to go back to home screen
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To switch on I/Q Analog Output A, click on TX tab (#1) and then the BNC icon (#2)
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Signal Generation, Up-conversion to K-band and Measurement
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Switch On the I/Q Analog Output A as shown in the figure below
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Click on the back button
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Click on Modulation and switch On the Modulation
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Click on the back button
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Click on Modulation A (#1)
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Select the DVB-S2 Mode (#2) and select the desired Mod.Cod scheme (#3)
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Signal Generation, Up-conversion to K-band and Measurement
3.3 DVB-S2X Signal Generation in K-band (Parametric Configuration on BTC-GUI) This section explains how to generate DVB-S2 Signals and the parametric configuration on the BTC Graphical User Interface (GUI).
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Preset the BTC
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Click on the TX settings box
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To switch on I/Q Analog Output A, click on TX tab (#1) and then the BNC icon (#2)
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Signal Generation, Up-conversion to K-band and Measurement
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Switch On the I/Q Analog Output A as shown in the figure below
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Click on the back button
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Click on Modulation and switch On the Modulation
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Click on the back button
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Click on Modulation A (#1)
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Select the DVB-S2 Mode (#2)
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Signal Generation, Up-conversion to K-band and Measurement
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From the SignalGen A menu, select Coding and configure the parameters as shown in the figure below in the following order
▪
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Pilots can be ON or OFF (Depends on user need). Depending on the state of the pilot settings on the BTC, the FSW analysis must be properly configured for performing DVB-S2 payload measurements. (Explained in Section 3.5.2.2)
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Select the desired DVB-S2X Mod.Cod from the drop down box
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If Annex is Switched ON, number of Time Slice can be adjusted from 1 to 8
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Signal Generation, Up-conversion to K-band and Measurement
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Time Slice configurations can be performed from the TSL menu
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Signal Generation, Up-conversion to K-band and Measurement
3.4 Additional Features Satellite communication links are subject to, amongst other impairments, noise (AWGN) and fading. However, the noise contribution on the uplink and downlink signals are different. The BTC offers the possibility to simulate the complete satellite link and works fully independently for up- and downlink. Satellite transmission links are not immune to fading effects (i.e. rain fade and multipath). The fading effect depends on the location of transmitting earth station and the receiving earth station. The BTC also add the capability to simulate complex fading scenarios, with a choice of multiple fading profiles and up to 40 independent fading paths. According to ETSI TS 103129, DVB-CID (Carrier Identity) technology is described as a mechanism to trace and avoid interference on satellite uplinks. DVB-CID is a Global Unique Identifier (GUI) with GPS coordinates and contact details. The BTC can generate DVB-CID signals with only a few button clicks. In order to simulate downlink interface signals, up to eight interferers can emulated with the BTC. Eight different waveforms of up to 160 MHz bandwidth can be loaded on to the internal arbitary waveform generator (ARB). Predefined signals are also available as waveform libraries.
3.4.1 AWGN Simulation on Up- and Downlink Simulating AWGN noise on the uplink signal ı
Click SignalGen A
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Switch AWGN option ON
AWGN before fading for uplink channel simulation
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Signal Generation, Up-conversion to K-band and Measurement
Simulating AWGN noise on the downlink signal ı
Select Add Noise (After Fader A on the home screen)
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Switch On AWGN
after fading AWGNAWGN after fading for downlink channel simulation for downlink channel simulation
3.4.2 Signal Fading Simulation To configure the Baseband Fader of the BTC
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Select the Fader on the home screen
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Configure the Fading/Baseband Config. as shown in the figure below
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Configure the Profile according to use case
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Signal Generation, Up-conversion to K-band and Measurement
3.4.3 DVB-CID Waveform Generation ı
Select the SignalGen A Mode on the BTC
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Select the CID Menu
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Switch On the CID and configure the parameter according to application requirement
3.4.4 Satellite Interference Signals
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Configure the Interferer A in ARB Mode
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Select or load the required signal files in Waveform tab
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Switch State On
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Signal Generation, Up-conversion to K-band and Measurement
3.5 Measurement Setup and Signal Analysis Using the measurement setup shown in Section 3.5.1, both transmitter side and receiver side (end-to-end) measurement can be performed. For performing the transmitter side measurement, the DVB-S2 or DVB-S2X signal from the BTC and SGMA combination feeds into the DUT. The output of the DUT connects to the FSW to perform measurements. For performing receiver side measurement, the BTC is capable of simulating an endto-end signal, which feeds into the input of the DUT and the output of which connects to the FSW for analysis.
3.5.1 Measurement Setup
RF2 SGU
HMP4030
Incase the BTC is configured with a second RF path
RF1
SGU LAN
LAN SGS
BTC Q I
PCIe
SGS
FSW
PCIe
Q I
DC
RFIN
DUT REF 10 MHz DUT
Fig. 3-2: Generated DVB-S2 & DVB-S2X Test Signal Quality Analysis
Fig. 3-2 shows the measurement setup for generating a DVB-S2 or DVB-S2X test signal and characterizing the performance (in terms of EVM and MER) of a DUT using the FSW. However, this application note is intended at providing the reader with a clear idea of the quality of the generated K-band DVB-S2 and DVB-S2X signal. With that in mind, a direct connection is setup from the signal generator to the signal and spectrum analyzer. The quality of the test signal is then measured. The following sections describe how to configure the signal generator, SGMA instruments and the spectrum analyzer in order to perform measurements on your DUT.
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Signal Generation, Up-conversion to K-band and Measurement
3.5.1.1 SGMA (SGU+SGS) Instruments GUI Configuration for Signal Upconversion The SGMA instruments do not have on board displays and thus require to be remotely controlled using the Graphical User Interface (GUI) from a computer via LAN. The Software can be downloaded free from the Rohde & Schwarz website. http://www.rohde-schwarz.com/en/software/sgu100a/
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Open SGMA-GUI
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Setup > Instrument > Scan
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Select SGS and SGU and press ON
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Select SGS-xxxxxx > Extension > ON > Test
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Signal Generation, Up-conversion to K-band and Measurement
3.5.2 DVB Signal Analysis Configuration A DVB-S2X signal comprises two different modulation schemes; the header and the pilot section uses π/2-DBPSK whilst the payload employs an M-ary (A)PSK modulation. The vector signal analysis software analyses one modulation scheme at a time. Therefore, the header and payload must be analyzed separately. The FSW provides the Multi Standard Radio Analyzer (MSRA). This mode of operation allows multiple personalities or multiple instances of the same personality to access and analyze the same set of captured data. The functionality provided by this mode is time correlation between the header segment and the following payload section.
3.5.2.1 DVB-S2X Header Analysis Settings on the FSW Signal Generation configuration on BTC ı
Perform the signal generator connection as described in Section 3.1
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Generate a DVB-S2 signal as described in Section 3.2 or a DVB-S2X signal as described in Section 3.3
Signal Analysis configuration on FSW ı
On the FSW hard keys, press Mode and then switch ON the Multi-Standard Radio Analyzer Mode
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On the FSW hard keys, press FREQ
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Center = (as required, for example 27 GHz)
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MEAS CONFIG > Data Acquisition > ▪ ▪
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Recommended (Sample Rate = 80 MHz, Record Length >160000) Or default values can also be used
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Next on the FSW hard keys, press Mode and then select VSA
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Perform signal description settings as shown below
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Signal Generation, Up-conversion to K-band and Measurement
▪ ▪ ▪ ▪
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MEAS CONFIG > Signal Description > Modulation (shown above) Signal Description > Signal Structure (shown above) Signal Description > Signal Structure > Pattern Config Choose APSK_Header > Select Add to Standard
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MEAS CONFIG > Signal Capture > Data Acquisition > 40000 symbols
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MEAS CONFIG > Burst & Pattern Search > Pattern Search
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MEAS CONFIG > Range Settings > Result Range > 90 Symbols
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Signal Generation, Up-conversion to K-band and Measurement
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Header Measurement Results
▪
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The red circle is the Trigger Offset value for payload measurement in the next section
This header measurement settings is valid for all DVB-S2X MOD.CODs
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Signal Generation, Up-conversion to K-band and Measurement
3.5.2.2 DVB-S2X Signal Analysis Settings on the FSW ı
On the FSW hard keys, select Mode > Duplicate Current Channel
Footer: >Insert >Header & Footer
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Perform signal description settings as shown below
▪ ▪ ▪ ▪
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MEAS CONFIG > Signal Description > Modulation (shown above) Set Type > User Modulation Select User Modulation > Desired mapping file as explained in 2.1.1 Select Symbol Rate and Filter type same as the input signal
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MEAS CONFIG > Range Settings > Result Length > According to table below
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MEAS CONFIG > Signal Capture > Data Acquisition > According to table below
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MEAS CONFIG > Range Settings > Evaluation Range > Entire Result Length Rohde & Schwarz DVB-S2 & DVB-S2X Signal Generation in K-Band and Analysis
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Signal Generation, Up-conversion to K-band and Measurement
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On the FSW hard keys, Select Run Single
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On the FSW hard keys, Select TRIG > Capture Offset > (Use value from the VSA window used to measure the Header signal)
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On the FSW hard keys, Select Sweep > Refresh
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From the Result Summary window, all relevant signal characteristics can be monitored
Signal Type: ▪ ▪
256APSK 32/45 Sx (Mod.Cod 64 on BTC) Symbol Rate : 20 MS/s, Roll Off : 0.2
Fig. 3-3: EVM measurement on DVB-S2X 256APSK signal generated using R&S signal generators and analyzed using FSW at different frequencies
Fig. 3-3 shows the EVM measurements on DVB-S2X signals. The FSW is capable of analyzing RF signal up to 85 GHz without the need of external down conversion.
Fig. 3-4: 256APSK modulated DVB-S2X signal measurement on the FSW at 27 GHz
Fig. 3-4 shows the DVB-S2X signal with 256APSK modulation being analyzed at 27 GHz.
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Signal Generation, Up-conversion to K-band and Measurement
3.5.2.3 DVB-S2 Signal Analysis Settings on the FSW On the FSW: DVB-S2 measurements are performed in Signal + Spectrum Analyzer mode of the FSW.
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Press the MODE > VSA
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MEAS > Digital Standards >
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From the drop down box select DVB_S2 > for this example DVB_S2_32APSK.xml
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MEAS CONFIG > Signal Description
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Define Modulation parameters
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MEAS CONFIG > Range Settings > Result Length > According to table below
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MEAS CONFIG > Signal Capture > Data Acquisition > According to table below
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MEAS CONFIG > Range Settings > Evaluation Range > Entire Result Length
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On the FSW hard keys, Select Run Single
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Signal Generation, Up-conversion to K-band and Measurement
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From the Result Summary window, all relevant signal characteristics can be monitored
Fig. 3-5: DVB-S2 Signal Analysis using FSW-K70 at 21 GHz
Fig. 3-6: DVB-S2 Signal Analysis using FSW-K70 at 30 GHz
Fig. 3-5 and Fig. 3-6 shows the DVB-S2 signal with 32APSK modulation (Roll-off = 0.25, Symbol Rate = 20 MS/s and code rate 4/5) being analyzed at 21 GHz and 30 GHz.
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Literature
4 Literature 1. "Laboratory evaluation of DVB-S2 state-of-the-art equipment", A. Bertella, V. Mignone, B. Sacco, M. Tabone; RAI-CRIT 2. "ETSI EN 302 307 V1.2.1 (2009-08)", European Standard (Telecommunications series) 3. "DVB-S2X Demystified", Koen Willems, White Paper, Newtec 4. "The view from JUPITER: High-Throughput Satellite Systems (July 2013)", White Paper, HUGHES 5. "White Paper on the use of DVB-S2X for DTH applications, DSNG & Professional Services, Broadband Interactive Services and VL-SNR applications", TM-S ad-hoc group, DVB Document A172 6. "ETSI EN 302 307-2 V1.1.1 (20014-10)", European Standard (Telecommunications series)
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Ordering Information
5 Ordering Information Designation
Type
Order No.
R&S®BTC
Broadcast Test Center
2114.3000.02
R&S®BTC-B3106
Frequency range 100 kHz up to 6 2114.3200.02 GHz, RF Path A
R&S®BTC-B3206
100 kHz to 6 GHz, RF path B
2114.3400.02
R&S®BTC-B1
Baseband Generator 1st channel
2114.3500.02
R&S®BTC-B2
Baseband Generator 2nd channel 2114.3600.02
R&S®BTC-K2500
Extended I/Q Interfaces Analog and digital IQ-Inputs and Outputs Enables installed hardware interfaces
2114.7293
R&S®BTC-B11
Baseband Main Module, one I/Q path to RF
2114.6500.02
R&S®BTC-B12
Baseband Main Module, two I/Q paths to RF
2114.6600.02
R&S®BTC-B3206
100 kHz to 6 GHz,
Broadcast Test Center*
RF path B ®
R&S BTC-B3100
Low Phase Noise
2114.6000.02
R&S®BTC-K35
Arbitrary Waveform Generator, 1GSample
2114.6974.02
R&S®BTC-K508
DVB-S/S2, real-time coder
2114.7093.02
R&S®BTC-K510
DVB-S2X, real-time coder S2/S2X-/S2X VL-SNR MODCODs
2114.7170.02
R&S®BTC-B1031
Path A Fading Simulator
2114.3700.02
R&S®BTC-B1032
Path B Fading Simulator, (HW opt.)
2114.3800.02
R&S®BTC-K1031
Dynamic Fading
2114.7158
Additional fading profiles Birth Death, Moving propagation and more
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R&S®BTC-K1040
AWGN Generator Package up to 160 MHz bandwidth, additive white gaussian noise, option package (2 paths)
R&S®BTC-K1043
2114.7787.02 Extended AWGN Generator, option package (SL) Additive White Gaussian Noise Generator, phase noise, impulsive noise, option package (2 paths)
R&S®WV-K810
DVB-CID Waveforms
2114.7770.02
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Ordering Information
R&S®WV-K1123
Satellite Interferers
2116.9970.02
SGMA RF Source and Upconverter* R&S®SGS100A
SGMA RF Source
1416.0505.02
R&S®R&S®B106V
1 MHz to 6 GHz, I/Q (with vector modulation)
1416.2350.02
R&S®SGS-B112V
Frequency Extension to 12.75 GHz, IQ
1416.1576.02
R&S®SGS-B1
Reference Oscillator OCXO
1416.2408.02
R&S®SGS-B26
Electronic Step Attenuator
1416.1353.02
R&S®SGU100A
SGMA Upconverter
1416.0808.02
R&S®SGU-B120V
10 MHz to 20 GHz, I/Q (with vector modulation)
1418.2657.02
R&S®SGU-B140V
Frequency extension to 40 GHz, I/Q
1418.2928.02
R&S®SGU-B26
Mechanical Step Attenuator
1418.3401.02
R&S®SGU-Z4
Connection Kit SGU100A to SGS100A
1418.3701.02
R&S®FSW43
Signal und spectrum analyzer 2 Hz to 43.5 GHz
1312.8000.43
R&S®FSW-B24
RF preamplifier, 100 kHz to 43 GHz
1313.0832.43
R&S®FSW-B8
Resolution bandwidth > 10 MHz
1313.2464.02
R&S®FSW-B160
160 MHz Analysis Bandwidth,
1313.1668.02
R&S®FSW-K70
Vector Signal Analysis
1313.1416.02
R&S®FSW-B500
500 MHz Analysis Bandwidth
1313.4296.02
R&S®FSW-B4
OCXO Precision Reference Frequency
1313.0703.02
R&S®FSW-B25
Electronic Attenuator, 1 dB steps
1313.0990.02
Signal and Spectrum Analyzer*
*Other ZVA, FSW, RTO, vector signal generator (SMW, SGU, SGS, SGT), BTC, Power Sensor, Power Meter are available as well. More Options are available. The instrument's minimum configuration for this application is shown in the table. Please ask your local representative for a suitable configuration according to your needs.
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Rohde & Schwarz
Regional contact
The Rohde & Schwarz electronics group offers innovative solutions in the following business fields: test and measurement, broadcast and media, secure communications, cybersecurity, radiomonitoring and radiolocation. Founded more than 80 years ago, this independent company has an extensive sales and service network and is present in more than 70 countries.
Europe, Africa, Middle East +49 89 4129 12345
[email protected]
The electronics group is among the world market leaders in its established business fields. The company is headquartered in Munich, Germany. It also has regional headquarters in Singapore and Columbia, Maryland, USA, to manage its operations in these regions.
North America 1 888 TEST RSA (1 888 837 87 72)
[email protected] Latin America +1 410 910 79 88
[email protected] Asia Pacific +65 65 13 04 88
[email protected] China +86 800 810 82 28 |+86 400 650 58 96
[email protected] Sustainable product design ı
Environmental compatibility and eco-footprint
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Energy efficiency and low emissions
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Longevity and optimized total cost of ownership
This application note and the supplied programs may only be used subject to the conditions of use set forth in the download area of the Rohde & Schwarz website.
PAD-T-M: 3573.7380.02/02.05/EN/
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG; Trade names are trademarks of the owners.
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Rohde & Schwarz GmbH & Co. KG Mühldorfstraße 15 | 81671 Munich, Germany DVB-S2 & DVB-S2X in K-Band Analysis Phone +Signal 49 89 Generation 4129 - 0 | Fax + 49 89and 4129 – 13777 www.rohde-schwarz.com
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