R&S®CLGD DOCSIS Cable Load Generator
Contents
1. Type F female 75 O Frequency range 47 MHz to 1218 MHz Return loss 47 MHz to 750 MHz 214dB 750 MHz to 870 MHz 213 dB 870 MHz to 1218 MHz 212 dB Downstream expanded frequency range Downstream High connector Type F female 75 O Frequency range 252 MHz to 1794 MHz Return loss 258 MHz to 750 MHz 214dB 750 MHz to 870 MHz 213 dB 870 MHz to 1218 MHz 212 dB 1218 MHz to 1794 MHz 2 10 dB Upstream Type F female 75 Q Frequency range 5 MHz to 204 MHz Return loss 2 10 dB CSO CTB Type F female 75 Q Frequency range 47 MHz to 1002 MHz Return loss 47 MHz to 750 MHz 2 14 dB 750 MHz to 870 MHz 213 dB 870 MHz to 1002 MHz 2 12dB Data and transport stream inputs IP data inputs 2 x SFP Control inputs and output reference input BNC 50 Q Reference frequency 10 MHz 10 24 MHz Trigger input BNC 50 Q Trigger output BNC 50 Q LAN control interface RJ 45 Control via Wi Fi with USB Wi Fi adapter Enhancements USB interfaces 2 x USB type A 10 Basically control should be possible with every commercially available USB Wi Fi adapter The function was tested with the TL WN722N adapter from TP LINK 16 Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator General data Version 02 00 August 2015 Environmental conditions Temperature Operating temperature range 0 C to 42. Phase noise R amp S CLGD K1050 option The phase noise affects all active channels Version 02 00 August 2015 Format double sideband noise integrated via a frequency decade referenced to the level of the carrier in dBc Offset from carrier 1 kHz to 100 MHz Characteristic user defined in frequency decades Setting range 1 kHz to 10 kHz offset from carrier 65 dBc to 30 dBc 10 kHz to 100 kHz offset from carrier 65 dBc to 44 dBc 100 kHz to 1 MHz offset from carrier 65 dBc to 50 dBc 1 MHz to 10 MHz offset from carrier 65 dBc to 51 dBc 10 MHz to 100 MHz offset from carrier 65 dBc to 57 dBc Step size of setting 0 1 dBc The DOCSIS 3 1 standard specifies the phase noise in this relatively unusual format The R amp S CLGD also uses this format making it easy to set the specifications found in the DOCSIS 3 1 standard The user manual describes how to convert the phase noise to the more common single sideband format with a normalized bandwidth of 1 Hz Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator 15 Version 02 00 August 2015 Interfaces RF outputs The R amp S CLGD comes with four F male F female adapters Rohde A Schwarz recommends always leaving these adapters on the RF outputs of the R amp S CLGD to prevent wear on these outputs Downstream fundamental frequency range Downstream Low connector
3. Preamble pattern user defined hex string Preamble length integer number of QPSK symbols up to 1536 bit Preamble value offset multiple of symbol size Preamble type QPSKO QPSK1 parameter k FEC error correction parameter T no FEC T 0 FEC with 2 x T parity bytes T 1 to 16 FEC codeword information bytes 16 to 253 Last codeword length fixed shortened Scrambler on off Scrambler seed 15 bit from user defined hex string Spreading intervals per frame 1 to 32 Codes per minislot 2 to 32 Active codes mode 1 64 to 128 Symbol interleaver step size 1 to 31 Codes per subframe 2 to number of active codes Code hopping seed settable Content PRBS or user defined file Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator 11 Version 02 00 August 2015 Arbitrary waveform generator Bandwidth lt 100 MHz Burst timing controlled via trigger input Number of simultaneously played ARB bandwidth lt 10 MHz max 4 waveform files bandwidth lt 100 MHz max 2 Number of RF channels per waveform bandwidth lt 10 MHz max 32 file bandwidth gt 10 MHz 1 ARB waveform files included for DOCSIS 3 0 A TDMA with 1 6 MHz bandwidth A TDMA with 3 2 MHz bandwidth A TDMA with 6 4 MHz bandwidth S CDMA with 1 6 MHz bandwidth S CDMA with 3 2 MHz bandwidth S CDMA with 6 4 MHz bandwidth for DOCSIS 3 1 OFDMA ini
4. CLGD simulates AC hum by superimposing amplitude modulation on all active channels Mains frequency 47 Hz to 200 Hz Step size of setting 0 1 Hz AM modulation depth 0 to 6 Step size of setting 0 1 Narrowband interference signal and impulsive noise R8 SSPCLGD K1050 option The narrowband interference signal can be placed on any frequency in the frequency range of the selected mode and can overlap an active channel To simulate impulsive noise the narrowband interference signal can be periodically pulsed Mode continuous or periodically pulsed Period length Osto 11 18 s Step size of setting 1 us Pulse length 0 s to 5 59 s Step size of setting 1 us Center frequency any frequency in the frequency range of the selected mode Interference signal level referred to the wanted signal 40 dB to 5 dB Step size of setting 0 1 dB Modulation AWGN Bandwidth 0 MHz to 20 MHz Step size of setting 1 Hz a 8 14 Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator The overall tilt is the sum of the frequency response of an analog filter and the level settings of the individual channels For every desired tilt the R amp S CLGD automatically finds the most favorable combination of analog filter and level setting The fact that the tilt is set by an analog filter does not deteriorate signal to noise ratio versus frequency
5. DOCSIS Cable Load Generator Version 02 00 August 2015 JE ET 16 Eet een Eege 16 Downstream fundamental frequency range Downstream LOW connector sese eee eee 16 Downstream expanded frequency range Downstream High congechor sese eee eee 16 Upstrearn cti AA A A pee eed A i idle AS bead A Di rea 16 eree A eae Lead ace ce se eed Se ed ees ee ee ne 16 Dat and transport streamy TBG ees Guisch Eed ANEN AR nse aa 16 Control inpuits AN De A Are ae Aa ee A a alae i 16 Eta COMO MESS T mane cri auc sutras ntact A A civ Out cna tse LADA EE AOS SUS Cdi ai a 16 Gora dada a ta a aia dd iba 17 Ordering 1Jnformmation E 18 Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator 3 Version 02 00 August 2015 Definitions General Product data applies under the following conditions Three hours storage at ambient temperature followed by 30 minutes warm up operation Specified environmental conditions met Recommended calibration interval adhered to All internal automatic adjustments performed if applicable Specifications with limits Represent warranted product performance by means of a range of values for the specified parameter These specifications are marked with limiting symbols such as lt lt gt gt or descriptions such as maximum limit of minimum Compliance is ensured by testing or is derived from the design Test limits are narrowed by guard bands to take into account measurement uncertainties drift and aging if
6. MHz Number of simultaneously played bandwidth lt 100 MHz ARB waveform files max 2 in addition to another max 2 in the low band broadband ARB generator 100 MHz lt bandwidth lt 200 MHz 1 in addition to another one in the low band broadband ARB generator Number of RF channels per waveform file 1 Sample rate per waveform file when 2 files are played simultaneously lt 170 Msample s when 1 file is played lt 340 Msample s Transport stream generator The R amp S CLGD comes with a built in transport stream generator that can play back MPEG 2 transport stream files The generated transport stream can be used as the content for a J 83 A B C channel Transport stream format MPEG 2 SPTS with 1 PAT and 1 PMT Packet size 188 byte Transport stream file size max 188 Mbyte File format trp ts mpg Seamless loop playback can be switched on and off for continuity counter PCR DTS PTS TDT TOT Bit rate lt bit rate of channel An ARB waveform file with a bandwidth of up to 10 MHz can be played on multiple RF channels at the same time ARB waveform files with bandwidths gt 10 MHz can be played only on one RF channel Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator 9 Version 02 00 August 2015 Upstream R amp S CLGD K300 option DOCSIS 3 1 Modulation burst OFDMA Burst timing controlled via tr
7. bytes SID wideband probe start subcarrier subcarrier skipping symbols in frame Content PRBS or user defined file 10 Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator DOCSIS 3 0 A TDMA Version 02 00 August 2015 Modulation burst A TDMA Burst timing controlled via trigger input Bandwidth 0 8 MHz 1 6 MHz 3 2 MHz 6 4 MHz Constellation QPSK DQPSK 8QAM 16QAM D16QAM 32QAM 64QAM Preamble pattern user defined hex string Preamble length integer number of QPSK symbols up to 1536 bit Preamble value offset multiple of symbol size Preamble type QPSKO QPSK1 parameter k FEC error correction parameter T no FEC T 0 FEC with 2 x T parity bytes T 1 to 16 FEC codeword information bytes 16 to 253 Last codeword length fixed shortened Reed Solomon interleaver mode disabled fixed dynamic Reed Solomon interleaver depth interleaver mode fixed 2 to 2048 k 2T Reed Solomon interleaver block size interleaver mode dynamic 2 x k 2T to 2048 Scrambler on off Scrambler seed 15 bit from user defined hex string Content PRBS or user defined file DOCSIS 3 0 S CDMA Modulation burst S CDMA Burst timing controlled via trigger input Bandwidth 1 6 MHz 3 2 MHz 6 4 MHz Constellation QPSK 8QAM 16QAM 32QAM 64QAM TCM QPSK TCM 8QAM TCM 16QAM TCM 32QAM TCM 64QAM TCM 128QAM
8. into account environmental conditions aging wear and tear Device settings and GUI parameters are indicated as follows parameter value Typical data as well as nominal and measured values are not warranted by Rohde amp Schwarz 4 Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator RF characteristics Frequency Version 02 00 August 2015 Total frequency range upstream R amp S CLGD base unit 5 MHz to 204 MHz Total frequency range downstream R amp S CLGD base unit 47 MHz to 1218 MHz with R amp S CLGD K3018 47 MHz to 1794 MHz Settable frequency range depends on selected mode see Operating modes on page 13 Step size of setting 1 Hz Level Downstream outputs low and high Maximum sum level 1 active DOCSIS 3 1 channel 59 dBmV 1 active J 83 A B C channel 62 dBmV 2 active J 83 A B C channels 61 dBmV 4 active J 83 A B C channels 60 dBmV 158 active J 83 A B C channels 57 dBmV Setting range of sum level 12 dBmV to max sum level Level setting range per channel i when more than one channel is active 0 to max level per channel d Step size of setting 0 1 dB Level uncertainty at maximum level O dB tilt and O dB attenuation 1 active channel typ 0 25 dB max lt 1 0 dB 2 2 active channels max lt 1 5 dB Upstream output Maximum sum level 1 active DOCSIS 3 1 ch
9. than 80 years ago this independent company has 1 Long term dependability an extensive sales and service network and is present in more than 70 countries 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 Sustainable product design 1 Environmental compatibility and eco footprint 1 Energy efficiency and low emissions 1 Longevity and optimized total cost of ownership Certified Quality Management Certified Environmental Management ISO 9001 150 14001 Rohde amp Schwarz GmbH amp Co KG www rohde schwarz com Regional contact 1 Europe Africa Middle East 49 89 4129 12345 customersupport rohde schwarz com 1 North America 1 888 TEST RSA 1 888 837 87 72 customer support rsa rohde schwarz com 1 Latin America 1 410 910 79 88 customersupport la rohde schwarz com 1 Asia Pacific 65 65 13 04 88 customersupport asia rohde schwarz com 1 China 86 800 810 82 28 86 400 650 58 96 customersupport china rohde schwarz com
10. 18 MHz simultaneously usable max 1146 MHz Number of DOCSIS 3 1 channels max 2 Number of single carrier QAM channels J 83 B J 83 C ISDB C max 160 J 83 A DVB C max 143 Enhanced functionality R amp S CLGD K301 8 required Settable frequency range for DOCSIS 3 1 at downstream output high 252 MHz to 1794 MHz for single carrier QAM channels at downstream output high 252 MHz to 1218 MHz Number of DOCSIS 3 1 channels max 4 Number of single carrier QAM channels J 83 B J 83 C ISDB C max 160 J 83 A DVB C max 120 Upstream signal generation Upstream signal generation requires the R amp S CLGD K200 option Cable modem emulation mode Upstream CM emulation mode Settable frequency range 5 MHz to 204 MHz Number of DOCSIS 3 1 channels max 2 Number of DOCSIS 3 0 channels with different parameters in each channel max 4 with identical parameters in each channel max 32 Upstream burst timing control Signal timing continuous burst single shot Trigger delay 0 to 9999 us Burst spacing 0 to 9999 us Trigger output 0 to 9999 ys after trigger input Resolution of timing settings 4ns P All simultaneously generated single carrier QAM channels must lie within an 1146 MHz frequency band e between 47 MHz and 1193 MHz or between 72 MHz und 1218 MHz or in a maximally 1146 MHz wide frequency band in betwe
11. 5 C Operating humidity 0 to 50 noncondensing max 80 for temperatures up to 31 C decreases linearly to 50 at 45 C Mechanical resistance Vibration operational NEBS transport NEBS transport 2B Power rating Rated voltage 120 V to 240 V AC Rated frequency 50 Hz to 60 Hz Rated power 200 VA Product conformity Electromagnetic compatibility EN 55011 EN 61326 1 EN 61326 2 2 ICES 003 Part 15 of FCC Rules radio interference class A und basic immunity requirements Electrical safety in line with EU low voltage directive applied harmonized standard 2006 95 EC EN 61010 1 USA UL 61010 1 Canada CAN CSA C22 2 No 61010 1 Calibration interval after 12 months then every 36 months Dimensions WxHxD 462 mm x 105 mm x 406 mm 19 2 HU 18 19 in x 4 13 x 15 98 in Weight 5 2 kg 11 46 lb Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator 17 Version 02 00 August 2015 Ordering information Designation Type Order No DOCSIS Cable Load Generator for TV and DOCSIS base unit R amp S CLGD 2118 6956 02 incl power cable quick start guide and CD ROM with user manual Downstream Full Channel Load Generator R amp S CLGD K200 2118 6962 02 Upstream Cable Modem Emulator R amp S CLGD K300 2118 6979 02 Downstream Frequency Range Extension to 1794 MHz R amp S CLGD K3018 2118 6985 02 Signal Interference
12. DOCSIS Cable Load Generator 7 Version 02 00 August 2015 Digital TV standards and DOCSIS 3 0 J 83 A DVB C Standard ITU T J 83 Annex A EN 300429 Modulation single carrier QAM Bandwidth 8 MHz Constellation 64QAM 256QAM Symbol rate 5 Msymbol s to 6 952 Msymbol s Rolloff 0 15 Interleaver 12 17 MER typ 45 dB Content generated internally PRBS MPEG 2 transport stream external feed MPEG 2 transport stream over IP J 83 B Standard ITU T J 83 Annex B Modulation single carrier QAM Bandwidth 6 MHz Constellation 64QAM 256QAM Symbol rate 4 Msymbol s to 5 37 Msymbol s Rolloff 0 12 0 18 Interleaver in line with ITU T J 83 Annex B MER typ 45 dB Content generated internally PRBS MPEG 2 transport stream external feed MPEG 2 transport stream over IP J 83 C ISDB C Standard ITU T J 83 Annex C Modulation single carrier QAM Bandwidth 6 MHz Constellation 64QAM 256QAM Symbol rate 4 Msymbol s to 5 325 Msymbol s Rolloff 0 13 Interleaver 12 17 MER typ 45 dB Content generated internally PRBS MPEG 2 transport stream external feed MPEG 2 transport stream over IP Analog TV standards Standards PAL NTSC Bandwidth NTSC 6 MHz PAL 7 MHz 8 MHz Content color bar test pattern with 1 kHz sinusoidal tone 8 Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator Arbit
13. M and 24 x J 83 A B C f lt 600 MHz 2 50 dB 600 MHz lt f lt 1002 MHz 2 47 dB 1002 MHz lt f lt 1218 MHz 245 dB 1 x 24 MHz OFDM f lt 600 MHz 2 48 dB 600 MHz lt f lt 1002 MHz 245 dB 1002 MHz lt f lt 1218 MHz 2 43 dB PLC location settable subcarrier index or frequency of lowest PLC carrier PLC constellation 16QAM PLC content generated internally dummy data external feed data over IP NCP constellation QPSK 16QAM 64QAM Cyclic prefix 0 us 0 9375 us 1 25 us 2 5 us 3 75 Us 5 us Windowing 0 us 0 3125 us 0 625 us 0 9375 ps 1 25 us Exclusion band up to 3 bands each specified by start subcarrier and number of subcarriers Continuous pilot parameter 48 to 120 Interleaver depth FFT size 4k 50 kHz offset from carrier max 32 FFT size 8k 25 kHz offset from carrier max 16 FEC codeword shortening on off can be set for each profile Number of profiles 1to4 Profile constellation 16QAM 64QAM 128QAM 256QAM 512QAM 1024QAM 2048QAM 4096QAM overrange S 8192QAM 16384QAM Profile content generated internally MACLFSR PRBS external feed data over IP Advanced options import and export of configuration files for complex channel configurations 3 The R amp S CLGD can generate signals with 8192QAM and 16384QAM This might however violate some specifications of this data sheet Rohde amp Schwarz R amp S CLGD
14. R amp S CLGD DOCSIS Cable Load Generator Specifications ROHDE amp SCHWARZ Broadcast amp Media Test amp Measureme nt Data Sheet 02 00 Version 02 00 August 2015 CONTENTS A CEET 4 RF Characteristics ci a 5 AS EE 5 LV EE 5 Downstream Outputs lOW and boah 5 Upstream OUP Ut gt 2D ce AA a EA AAA de AAA eet AA E ee eee hone 5 CSO GTB Output 3 23 38 a O de al bac Gis 5 Spectralipurity new haw A A ei en nie ade 6 M d lation SyS EE 7 Downstream R amp S CLGD K200 option 7 DOCSIS Bl Tianna Na A A iT a AAA A AS 7 Digital TV standards and DOCSIS ZO it 8 Analog TV Stan ars iiss ii a oe dU eed capo aed seat A Svea AA derive deed ee ered ennai 8 Arbitrary waveform Generators cision wae da el ad cay 9 Ree S GEET 9 Upstream R amp S CLGD K300 option 10 DIS Aa 10 DOCSISB DASTTDMA EE 11 DOCSIS BO S CDMA EE 11 Teen Elte GE 12 Operating Kise TE 13 Downstream signal generation sees eee eee eee eee eee 12 DOCSIS EN 13 ER 13 Upstream signal generation TE 13 Gable Modemem lation AAA NN 13 Upstream Durst timing CONTO cli AA a AA AA A A A At ta 13 Signal Interference SIMU AION EE 14 BIHA A A A A A A LEA A 14 AWGN R amp S CLGD K1050 option 14 Microreflections RSSPCLGD K1050 elle EE 14 AG hum RES CLGD K1050 opio stent ticos ad tdo Ee dE 14 Narrowband interference signal and impulsive noise RS SPCLGD K1050 elle 14 Phase Holee RESTELCOK II Nba aid 15 2 Rohde amp Schwarz R amp S CLGD
15. Simulation R amp S CLGD K1050 2118 6991 02 Rackmount Kit 19 2 HU R amp S ZZA KN2 1175 3010 00 Service options Extended Warranty one year R amp S WE1 Please contact your local Extended Warranty two years R amp S WE2 Rohde amp Schwarz sales office Extended Warranty three years R amp S WE3 Extended Warranty four years R amp S WE4 Extended warranty with a term of one to four years WE1 to WE4 Repairs carried out during the contract term are free of charge da Necessary calibration and adjustments carried out during repairs are also covered Simply contact the forwarding agent we name your product will be picked up free of charge and returned to you in top condition a couple of days later For product brochure see PD 3607 0123 12 and www rohde schwarz com 1 Excluding defects caused by incorrect operation or handling and force majeure Wear and tear parts are not included 18 Rohde 8 Schwarz R amp S CLGD DOCSIS Cable Load Generator Version 02 00 August 2015 Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator 19 About Rohde amp Schwarz Service that adds value The Rohde amp Schwarz electronics group offers innovative 1 Worldwide solutions in the following business fields test and mea 1 Local and personalized surement broadcast and media secure communications o iene cybersecurity radiomonitoring and radiolocation Founded Uncompromising quality NE E il more
16. annel 59 dBmV 1 active 6 4 MHz DOCSIS 3 0 channel 62 dBmV 2 active 6 4 MHz DOCSIS 3 0 channels 61 dBmV 4 active 6 4 MHz DOCSIS 3 0 channels 60 dBmV Setting range of sum level 12 dBmV to max sum level Level setting range per channel 1 when more than one channel is active 0 to max level per channel S Step size of setting 0 1 dB Level uncertainty at maximum level and 0 dB attenuation 1 active channel typ 0 25 dB max lt 1 0 dB 2 2 active channels max 1 5 dB CSO CTB output Maximum sum level 1 active DOCSIS 3 1 channel 27 dBmV 1 active J 83 A B C channel 30 dBmV 2 active J 83 A B C channels 29 dBmV 4 active J 83 A B C channels 28 dBmV 158 active J 83 A B C channels 25 dBmV Setting range of sum level 12 dBmV to 30 dBmV Level setting range per channel l when more than one channel is active 0 to max level per channel a Step size of setting 0 1 dB Level uncertainty at maximum level 1 active channel typ 0 25 dB max lt 1 0 dB 2 2 active channels max 1 5 dB 1 When more than one channel is active the levels of the different channels are set in the digital signal processing unit In the case of large level differences between the active channels the signal quality of the channels with low level deteriorates 2 The maximum level per channel is determined by the maximum
17. applicable Y axis Specification limit Actual values with measurement uncertainty and guard band E Specification limit X axis Measurement uncertainties gt Guard band Specifications without limits Represent warranted product performance for the specified parameter These specifications are not specially marked and represent values with no or negligible deviations from the given value e g dimensions or resolution of a setting parameter Compliance is ensured by design Typical data typ Characterizes product performance by means of representative information for the given parameter When marked with lt gt or as a range it represents the performance met by approximately 80 of the instruments at production time Otherwise it represents the mean value Nominal values nom Characterize product performance by means of a representative value for the given parameter e g nominal impedance In contrast to typical data a statistical evaluation does not take place and the parameter is not tested during production Measured values meas Characterize expected product performance by means of measurement results gained from individual samples Uncertainties Represent limits of measurement uncertainty for a given measurand Uncertainty is defined with a coverage factor of 2 and has been calculated in line with the rules of the Guide to the Expression of Uncertainty in Measurement GUM taking
18. en these two This limitation does not apply to the Downstream High output since the settable frequency band of 252 MHz to 1218 MHz for single carrier QAM channels is less than 1146 MHz Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator 13 Version 02 00 August 2015 Signal interference simulation The R amp S CLGD base unit enables the user to add a tilt to the output spectrum All other signal interference simulations require the R amp S CLGD K1050 option Tilt Total setting range 15 dB 1 GHz to 15 dB 1 GHz Step size of setting 0 1 dB Tilt caused by analog filters 15 dB 1 GHz 9 dB 1 GHz 0 9 dB 1 GHz 15 dB 1 GHz AWGN R amp S CLGD K1050 option 1 dB bandwidth 800 kHz to 200 MHz Step size of setting 1 kHz Center frequency can be set in the active frequency range Noise level 0 dBmV to 51 dBmV Step size of setting 0 1 dB Reference quantity of C N absolute noise level signal power in symbol rate of channel signal power in user defined receiver bandwidth Microreflections R amp S CLGD K1050 option The simulation of microreflections affects all active channels Number of reflections 0to5 Duration 0to5us Step size of setting 0 1 us Attenuation 0 dB to 40 dB Step size of setting 0 1 dB AC hum R amp S CLGD K1050 option The R amp S
19. igger input FFT size 2k 50 kHz offset from carrier 4k 25 kHz offset from carrier Bandwidth FFT size 2k 50 kHz offset from carrier 10 MHz to 96 MHz FFT size 4k 25 kHz offset from carrier 6 4 MHz to 96 MHz can be set as the encompassed spectrum in MHz or as the number of guard subcarriers Constellation QPSK 8QAM 16QAM 32QAM 64QAM 128QAM 256QAM 512QAM 1024QAM 2048QAM 4096QAM Cyclic prefix 0 9375 us 1 25 us 1 525 us 1 875 us 2 1875 ys 2 5 us 2 8125 us 3 125 us 3 75 ys 5 us 6 25 us Windowing 0 us 0 3125 us 0 625 ys 0 9375 ys 1 25 us 1 5625 us 1 875 ys 2 1875 ys Pilot structure FFT size 2k 50 kHz offset from carrier 1to7 FFT size 4k 25 kHz offset from carrier 8 to 14 with pilot boosting 5 to 7 and 12 to 14 Burst types data initial ranging fine ranging bandwidth request wideband probe Settable parameters data pilot pattern constellation scrambler scrambler seed number of frames user starting minislot user ending minislot content initial ranging number of subcarriers number of minislots starting minislot preamble pattern preamble value offset preamble length MAC address downstream channel ID fine ranging number of subcarriers number of minislots starting minislot preamble pattern preamble value offset data bandwidth request number of minislots symbols subslot requested number of
20. rary waveform generator Version 02 00 August 2015 Number of samples per ARB waveform file lt 67 1 Msample 2 samples Value range lt 32767 File size lt 256 Mbyte Included ARB waveform files for analog TV NTSC PAL with 7 MHz bandwidth PAL with 8 MHz bandwidth for digital TV and DOCSIS 3 0 DVB C with 64QAM DVB C with 256QAM J 83 B with 64QAM J 83 B with 256QAM J 83 C with 64QAM J 83 C with 256QAM ISDB T for DOCSIS 3 1 DOCSIS 3 1 with 192 MHz bandwidth Narrowband ARB generator in fundamental frequency range Frequency range 47 MHz to 1002 MHz ARB bandwidth lt 10 MHz Number of simultaneously played max 4 ARB waveform files Number of RF channels per waveform file max 160 Sample rate per waveform file when 4 files are played simultaneously lt 18 Msample s Broadband ARB generator in fundamental frequency range Frequency range 47 MHz to 1218 MHz ARB bandwidth lt 200 MHz Number of simultaneously played bandwidth lt 100 MHz max 2 ARB waveform files 100 MHz lt bandwidth lt 200 MHz 1 Number of RF channels per waveform file 1 Sample rate per waveform file when 2 files are played simultaneously lt 170 Msample s when 1 file is played lt 340 Msample s Broadband ARB generator in expanded frequency range R amp S CLGD K3018 required Frequency range 1218 MHz to 1794 MHz ARB bandwidth lt 200
21. sum level divided by the number of active channels Rohde 8 Schwarz R amp S CLGD DOCSIS Cable Load Generator 5 Version 02 00 August 2015 Spectral purity CSO CTB with CW carriers in 80 channels at typ 70 dB CSO CTB output in line with ANSI SCTE 06 2009 and ANSI SCTE 161 2009 SNR with 157 active J 83 A B C channels 50 MHz to 350 MHz gt 52 dB 350 MHz to 700 MHz gt 51 dB 700 MHz to 1000 MHz gt 50 dB Spurious 50 MHz to 1000 MHz lt 63 dBc 1000 MHz to 1218 MHz lt 59 dBc Single sideband phase noise 1 kHz to 10 kHz lt 56 dBc 10 kHz to 100 kHz lt 60 dBc 100 kHz to 1 MHz lt 68 dBc 1 MHz to 10 MHz lt 70 dBc 10 MHz to 100 MHz lt 61 dBc 6 Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator Modulation systems Downstream R amp S CLGD K200 option Version 02 00 August 2015 DOCSIS 3 1 Modulation COFDM Bandwidth 24 MHz to 192 MHz can be set as the encompassed spectrum in MHz or as the number of guard subcarriers Frequency can be set as the frequency of the Oth subcarrier or as the channel center frequency FFT size 4k 50 kHz offset from carrier 8k 25 kHz offset from carrier Guard subcarrier FFT size 4k 50 kHz offset from carrier 148 to 2048 FFT size 8k 25 kHz offset from carrier 296 to 4096 MER f 500 MHz bandwidth 192 MHz typ gt 53 dB 2 x 192 MHz OFD
22. tial ranging OFDMA fine ranging OFDMA wideband probe OFDMA bandwidth request OFDMA data packet 5 An ARB waveform file with a bandwidth of up to 10 MHz can be played on multiple RF channels at the same time ARB waveform files with bandwidths gt 10 MHz can be played only on one RF channel 12 Rohde amp Schwarz R amp S CLGD DOCSIS Cable Load Generator Operating modes Version 02 00 August 2015 Since only one operating mode at a time can be active the R amp S CLGD cannot generate downstream and upstream signals simultaneously Downstream signal generation Downstream signal generation requires the R amp S CLGD K200 option The R amp S CLGD K3018 frequency range extension is required for the enhanced downstream signal generation functionality DOCSIS 3 1 mode Basic functionality Settable frequency range downstream output low 108 MHz to 1218 MHz Number of DOCSIS 3 1 channels max 5 Number of single carrier QAM channels 0 Enhanced functionality R amp S CLGD K301 8 required Settable frequency range downstream output high 252 MHz to 1794 MHz Number of DOCSIS 3 1 channels max 8 Number of single carrier QAM channels 0 Mixed mode Basic functionality Settable frequency range for DOCSIS 3 1 at downstream output low 108 MHz to 1218 MHz for single carrier QAM channels at downstream output low 47 MHz to 12
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