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keysight technologies dtmb (cttb) x-series measurement application N6156A & w6156a technical overview
introduction C measure dtmb (cttb) transmitters, exciters, modulators, gap-fllers, tuners, or amplifers performance C perform one-button tests with pass/fail limit per dtmb (cttb) standards C use hardkey/softkey manual user interface or scpi remote user interface C leverage built-in, context-sensitive help C move the application between x-series signal analyzers with transportable licensing
03 | keysight | dtmb (cttb) x-series measurement application N6156A & w6156a - technical overview dtmb (cttb) measurement application the keysight technologies, inc. dtmb (cttb) measurement applica - tion provides one-button standard- based power and modulation analysis capabilities to help your design, evaluation, and manufacturing of dtmb (cttb) modulators, transmit - ters, amplifers, tuners, and gap-fll - ers/repeaters. furthermore, with the optional analog baseband iq inputs in the pxa or mxa signal analyzer, it can provide you the fexibility of mea - suring the signal quality and modula - tion accuracy with rf input or analog iq input. key parameter setup C carrier mode: ofdm (c = 3780) and single carrier (c = 1) C device type: transmitter/exciter C bandwidth: 6 and 8 mhz C header type: pn 420/595/945 C modulation: 4qam-nr/4qam/ 16qam/32qam/64qam C input: rf or analog iq (available in the n9030a pxa or n9020a mxa) for signal quality and modulation accuracy measure - ments the dtmb (cttb) measurement application is just one in a common library of more than 25 measurement applications in the keysight x-series, an evolutionary approach to signal analysis that spans instrumentation, measurements, and software. the x-series analyzers, with upgradeable cpu, memory, disk drives, and i/o ports, enable you to keep your test assets current and extend instrument longevity. proven algorithms, 100% code-compatibility, and a common ui across the x-series create a consis - tent measurement framework for sig - nal analysis that ensures repeatable results and measurement integrity so you can leverage your test system software through all phases of prod - uct development. in addition to fxed, perpetual licenses for our x-series measurement applications, we also offer transportable licenses which can increase the value of your invest - ment by allowing to you transport the application to multiple x-series analyzers. try before you buy! free 30-day trials of x-series measurement applications provide unre - stricted use of each applications features and functionality on your x-series analyzer. redeem a trial license online today: www.keysight.com/fnd/x-series_trial
04 | keysight | dtmb (cttb) x-series measurement application N6156A & w6156a - technical overview technology overview digital terrestrial/television multi - media broadcasting (dtmb), also known as china terrestrial television broadcasting (cttb), is the chi - nese national terrestrial digital tv broadcasting standard which was announced on august 18, 2006 and implemented from august 1, 2007. dtmb supports both multi-carrier (c=3780) and single-carrier (c=1) modulation scheme. both schemes use low density parity check (ldpc) coding in forward error correction (fec), which can provide superior error correction capability for a bet - ter sensitivity especially at higher code rate. time domain synchronized orthogonal frequency division multi - plexing (tds-ofdm ) is implemented to deliver fast system synchronization and precise channel estimation. the dtmb (cttb) measurement ap - plication gives more convenience to your dtmb (cttb) system develop - ment and manufacturing, including both multi-carrier and single-carrier schemes with one-button measure - ments including standard presets and remote scpi programming capabili - ties on x-series signal analyzers. figure 1. block diagram of dtmb (cttb) system scrambler mapping and interleaver mux frame head frame body processing combine baseband processing up converter rf output system information fec data input
05 | keysight | dtmb (cttb) x-series measurement application N6156A & w6156a - technical overview rf transmitter tests the rf transmitter test requirements for dtmb transmitter and exciter are defned in gy/t 229.4 2008 and gy/t 229.2 2008 standards. table 1 shows rf transmitter and exciter tests defned by the specifcation along with the corresponding measure - ments provided by the dtmb (cttb) measurement application. table 1. required rf transmitter and exciter measurements and the corresponding measurements in n/w6156a and other modes test item gy/t 229.4 2008 (for transmitter measurement) gy/t 229.2 2008 (for exciter measurement) n/w6156a dtmb(cttb) measurement application frequency adjustable step spectrum analyzer mode (marker counter function) frequency stability spectrum analyzer mode (marker counter function) frequency accuracy spectrum analyzer mode (marker counter) rf power channel power (rf spectrum view) rf power stability channel power (rf spectrum view) rf effective bandwidth spectrum analyzer mode (marker counter function) roll factor spectrum analyzer mode (marker counter function) shoulder attenuation channel power (shoulder attenuation view) spectrum mask channel power (spectrum mask view) or spectrum emission mask in-band spectrum fatness modulation accuracy (spectral fatness view) useless power in adjacent channel acp power outside adjacent channel acp phase noise n/w9068a phase noise measurement application peak-to-average power ratio power stat ccdf modulation error ratio modulation accuracy (i/q measured polar graph view)
06 | keysight | dtmb (cttb) x-series measurement application N6156A & w6156a - technical overview measurement details all of the rf transmitter measure - ments as defned by the dtmb (cttb) standard, as well as a wide range of additional measurements and analysis tools, are available with a press of a button (table 2). these measurements are fully remote con - trollable via the iec/ieee bus or lan, using scpi commands. analog baseband measurements are available on the pxa or mxa signal analyzer equipped with bbiq hardware. supported baseband mea - surements include all of the modula - tion quality plus i/q waveform and ccdf measurements. table 2. one-button measurements provided by the n/w6156a measurement application technology dtmb (cttb) measurements channel power rf spectrum shoulder attenuation spectrum mask (with analog tv in adjacent channel) adjacent channel power spectrum emission mask monitor spectrum iq waveform modulation accuracy rms evm (%) peak evm (%) position of peak evm rms mer (db) peak mer (db) position of peak mer rms mag error (%) peak mag error (%) position of peak mag error rms phase error (deg) peak phase error (deg) position of peak phase error frequency error (hz) clock error (hz) tx power (dbm) quadrature error (deg) amplitude imbalance (%) mer/evm vs. subcarriers/frequency ampt vs subcarriers (db) phase vs subcarriers (deg) group delay vs subcarriers (ns) channel impulse response (db) mer of data block (db) mer of system info (db) mer of header (db) in-band spectrum ripple amax-ac (db) in-band spectrum ripple amin-ac (db)
07 | keysight | dtmb (cttb) x-series measurement application N6156A & w6156a - technical overview figure 2. dtmb (cttb) constellation and mer results figure 3. dtmb (cttb) iq quad view figure 4. dtmb (cttb) result metrics view
08 | keysight | dtmb (cttb) x-series measurement application N6156A & w6156a - technical overview figure 6. dtmb (cttb) spectrum emission mask figure 5. dtmb (cttb) shoulder attenuation
09 | keysight | dtmb (cttb) x-series measurement application N6156A & w6156a - technical overview key specifcations defnitions C specifcations describe the performance of parameters covered by the product warranty. C 95th percentile values indicate the breadth of the population (2) of performance tolerances expected to be met in 95% of cases with a 95% confdence. these values are not covered by the product warranty. C typical values are designated with the abbreviation "typ." these are performance beyond specifcation that 80% of the units exhibit with a 95% confdence. these values are not covered by the product warranty. C nominal values are designated with the abbreviation "nom." these values indicate expected performance, or describe product performance that is useful in the application of the product, but is not covered by the product warranty. C pxa and exa specifcations apply to analyzers with frequency options of 526 and lower. for analyzers with higher frequency options, specifcations are not warranted but performance will nominally be close to that shown in this section. note: data subject to change description pxa mxa exa cxa channel power 8 mhz integration bandwidth ?50 dbm (nom) C50 dbm (nom) C50 dbm (nom) C50 dbm (nom) absolute power accuracy 20 to 30 c 0.61 db ( 0.19 db 95%) 0.82 db ( 0.23 db 95%) 0.94 db ( 0.27 db 95%) 1.33 db ( 0.61 db 95%) measurement foor ?85.7 dbm C82.7 dbm C78.7 dbm C75.7 dbm channel power with shoulder attenuation view 7.61 mhz integration bandwidth ml 1 = C 14.0 dbm (nom) ml 1 = C16.0 dbm (nom) ml 1 = C16.0 dbm (nom) ml 1 = C15.0 dbm (nom) dynamic range, relative offset frequency 4.2 mhz 98.4 db (103.7 db typ) 92.2 db (98.5 db typ) 86.9 db (94.0 db typ) 84.5 db (91.7 db typ) power statistics ccdf minimum power at rf input ?50 dbm (nom) C50 dbm (nom) C50 dbm (nom) ?50 dbm (nom) histogram resolution 0.01 db 0.01 db 0.01 db 0.01 db adjacent channel power minimum power at rf input; 0 to 55 c ?36 dbm (nom) ?36 dbm (nom) ?36 dbm (nom) ?36 dbm (nom) acpr accuracy 7.56 mhz noise bandwidth, method = ibw offset frequency 10 mhz 0.18 db 0.44 db 0.93 db 1.36 db 1. ml (mixer level) is rf input power minus attenuation you can upgrade! options can be added after your initial purchase. all of our x-series application options are license-key upgradeable. up grade
10 | keysight | dtmb (cttb) x-series measurement application N6156A & w6156a - technical overview description pxa mxa exa cxa spectrum emission mask 7.56 mhz integration bw, rbw=3.9 khz 4.2 mhz offset dynamic range, relative 98.4 db (103.7 db typ) 92.2 db (98.5 db typ) 86.9 db (94.0 db typ) 84.5 db (91.7 db typ) sensitivity, absolute C114.5 db (C118.5 dbm typ) C110.5 dbm (-115.5 dbm typ) C105.5 dbm (C111.5 dbm typ) C102.5 dbm (C108.5 dbm typ) accuracy relative 0.10 db 0.18 db 0.18 db 0.27 db absolute, 20 to 30 c 0.62 db ( 0.20 db 95%) 0.88 db ( 0.23 db 95%) 1.05 db ( 0.31 db 95%) 1.53 db ( 0.64 db 95%) 10.0 mhz offset dynamic range, relative 100.8 db (106.1 db typ) 94.6 db (100.6 db typ) 89.3 db (96.0 db typ) 87.1 db (95.0 db typ) sensitivity, absolute C114.5 db (C118.5 dbm typ) C110.5 dbm (C115.5 dbm typ) C105.5dbm (C111.5 dbm typ) C102.5 dbm (C108.5 dbm typ) accuracy relative 0.12 db 0.21 db 0.21 db 0.36 db absolute 0.62 db ( 0.20 db 95%) 0.88 db ( 0.23 db 95%) 1.05 db ( 0.31 db 95%) 1.53 db ( 0.64 db 95%) mod accuracy 16qam evm, ml 1 = C20 dbm, 20 to 30 c sub-carrier number: 3780, frame header: pn420, code rate: 0.8, interleaver type: b=52, m=720, pn phase change: true evm eq off operating range 0 to 7% 0 to 7% 0 to 7% 0 to 7% floor 0.27% 0.47% 0.60% 0.79% accuracy from 0.3 to 1.4% (from 0.5% for mxa, 0.6% for exa) 0.20% 0.20% 0.30% from 1.4 to 2.0% 0.20% 0.30% 0.30% from 2.0 to 7.0% 0.70% 0.70% 0.70% mer eq off operating range 23 db 23 db 23 db 23 db floor 51 db 47 db 45 db 42 db accuracy from 37 to 51 db (to 46 db for mxa, 44 for exa) 2.90 db 2.88 db 2.96 db from 34 to 37 db 0.82 db 0.92 db 1.09 db from 23 to 34 db 0.81 db 0.84 db 0.89 db 16qam evm, ml 1 = C20 dbm, 20 to 30 c sub-carrier number: 1, frame header: pn595, code rate: 0.8, interleaver type: b=52, m=720, pn phase change: true, insert pilot: false evm eq off operating range 0 to 8% 0 to 8% 0 to 8% 0 to 8% floor 1.20% 1.28% 1.36% 1.10% accuracy from 1.2%/1.3%/1.4% (pxa/mxa/exa) to 2.0% 0.50% 0.60% 0.60% from 2.0 to 8.0% 0.40% 0.40% 0.50% mer eq off operating range 22 db 22 db 22 db 22 db floor 39 db 38 db 38 db 39.2 db accuracy from 34 to 38 db/37 db/37 db (pxa/mxa/exa) 2.76 db 2.59 db 2.81 db from 22 to 34 db 1.30 db 1.48 db 1.62 db 1. ml (mixer level) is rf input power minus attenuation
11 | keysight | dtmb (cttb) x-series measurement application N6156A & w6156a - technical overview ordering information the table below contains information on our fxed, perpetual licenses. for more information, please visit the product web pages. N6156A & w6156a dtmb (cttb) x-series measurement application description model-option model-option additional information pxa, mxa, exa cxa/cxa-m 1 dtmb (cttb) N6156A-2fp w6156a-2fp 1. the cxa-m only supports transportable license. visit the product web page for further information. for a complete list of specifications refer to the appropriate specifications guide. pxa: nvljkwrpilsdvslildwlrv mxa: nvljkwrpilpdvslildwlrv exa: www.keysight.com/find/exa/specifications cxa: nvljkwrpildvslildwlrv software licensing and confguration choose from two license types: C )lsuswxdoolv this allows you to run the appli - cation in the x-series analyzer in which it is initially installed. C udvsruwdosuswxdoolv this allows you to run the appli - cation in the x-series analyzer in which it is initially installed, plus it may be transferred from one x-series analyzer to another. try before you buy! free 30-day trials of x-series measurement applications provide unre - stricted use of each applications features and functionality on your x-series analyzer. redeem a trial license online today: www.keysight.com/fnd/x-seriestrial
12 | keysight | dtmb (cttb) x-series measurement application N6156A & w6156a - technical overview hardware confgurations n9030a pxa signal analyzer description model-option additional information 3.6, 8.4, 13.6, 42.98, 44 or 50 ghz frequency range n9030a-503, -508, -513, -526, -543, -544, or -550 one required analog baseband iq (bbiq) inputs n9030a-bba required for analog baseband measurement precision frequency reference n9030a-pfr recommended electronic attenuator, 3.6 ghz n9030a-ea3 recommended preamplifer, 3.6, 8.4, 13.6, 42.98, 44 or 50 ghz n9030a-p03, -p08, -p13, -p26, -p43, -544, or -550 analysis bandwidth to 25, 40, or 160 mhz n9030a-b25, -b40, or -b1x one optional wideband if output n9030a-cr3 optional programmable if output n9030a-crp optional n9020a mxa signal analyzer description model-option additional information 3.6, 8.4, 13.6, or 26.5 ghz frequency range n9020a-503, -508, -513, or -526 one required analog baseband iq (bbiq) inputs n9020a-bba required for analog baseband measurement precision frequency reference n9020a-pfr recommended electronic attenuator, 3.6 ghz n9020a-ea3 recommended preamplifer, 3.6, 8.4, 13.6, or 26.5 ghz n9020a-p03, -p08, -p13, or -p26 one recommended analysis bandwidth to 25 or 40 mhz n9020a-b25, -b40 one optional wideband if output n9020a-cr3 optional programmable if output n9020a-crp optional n9010a exa signal analyzer description model-option additional information 3.6, 7.0, 13.6, or 26.5 ghz frequency range n9010a-503, -507, -513, or -526 one required precision frequency reference n9010a-pfr recommended fine step attenuator n9010a-fsa recommended electronic attenuator, 3.6 ghz n9010a-ea3 recommended preamplifer, 3.6 or 7.0 ghz n9010a-p03 or -p07 one recommended analysis bandwidth to 25 or 40 mhz n9010a-b25, -b40 one optional wideband if output n9010a-cr3 optional programmable if output n9010a-crp optional n9000a cxa signal analyzer description model-option additional information 3.0, 7.5, 13.6, or 26.5 ghz frequency range n9000a-503, -507, -513, or -526 one required precision frequency reference n9000a-pfr recommended analysis bandwidth to 25 mhz n9000a-b25 optional tracking generator, 9 khz to 3ghz or 6 ghz n9000a-t03 or t06 one optional fine step attenuator n9000a-fsa recommended preamplifer, 3.0, 7.5, 13.6, or 26.5 ghz n9000a-p03, -p07, -p13, or -p26 one recommended wideband if output n9000a-cr3 optional
13 | keysight | dtmb (cttb) x-series measurement application N6156A & w6156a - technical overview related literature N6156A and w6156a dtmb (cttb) measurement application, demonstration guide, literature number 5990-5933en N6156A & w6156a dtmb(cttb) measurement application, measurement guide, part number n6156-90004 N6156A & w6156a dtmb(cttb) measurement application, user's and programmer's reference, part number n6156-90001 web product page: www.keysight.com/find/n6153a www.keysight.com/find/w6153a x-series measurement applications: www.keysight.com/find/x-series_apps x-series signal analyzers: www.keysight.com/find/x-series application pages: www.keysight.com/find/digitalvideo digital video solution table: www.keysight.com/find/digitalvideo_solution
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