rohde & schwarz cmu300
Contents
1. Universal Radio Communication Tester CMU 300 The base station tester for current and future mobile radio networks Extremely high speed testing Highly accurate measurements Modular future proof design Comprehensive spectrum analyzer and signal generator Upgradability to 3rd generation technologies ROHDE amp SCHWARZ The CMU300 a new generation in base station testing Rohde amp Schwarz milestones in digital testing 1990 CMTA94 The first test set for GSM transmitter and receiver testing 1991 CRTS02 04 Signalling tester for GSM mobile and base stations 1992 FTA Sole supplier of the GSM900 system simulator for conformance testing of mobiles 1993 ITA Sole supplier of GSM900 interim conformance test system upgradable to GSM1800 1994 CMD 55 57 The world s first com pact digital radiocommunication tester for GSM mobiles and base stations 1996 CRTP C02 Approved as standalone tester for conformance testing of GSM900 1800 phase II mobiles 1997 TS8915 Supplier of the first con formance test system for GSM1900 1997 CMD65 The world s first compact digital radiocommunication tester for GSM900 1800 1900 and DECT 1999 CMU 200 THE cellphone tester for current and future mobile radio networks 2000 CMU 300 Base station tester for current and future mobile radio networks 2 Universal Radio Communication Tester CMU 300 Rohde amp Schwarz has always been at the forefront of mobile radio t2. BER test of TCHs Circuit switched traffic channels can be tested in the BER or residual BER RBER frame erasure rate FER test modes The instrument supports the RF loop and the Apis loop option CMU B 1 required A cyclic redundancy check CRC excludes bit errors on the return path downlink from the BTS to the CMU 300 Addition Overview of the CMU300 BER test capabilities Burst by BTS loop CMU RAW Receiver Quality TCH menu RF loop RBER FER mode 1 115 0 000 0 000 Meaoune Mode RBER I FER LAS TCHR ChanvTS a TCH Channel Type Speech TCHIFS used Tineciat 1070 cm ied Tire D ot Forced channel Avnet tp CMU K30 to K34 GMSK and burst demodulator BER loop setup without and CMU K41 BPSK RAW BER modulator only TCH FS signalling CMU K41 supported optional for 8PSK BER BTS BSC CMU BER loop Forced channel CMU K30 to K34 RBER IBER loop with with channel setup without CMU B71 and FER channel de decoding call procedure CMU K39 coding op optional MOC optional tional loop via MTC Aus BER BTS BSC CMU BER loop Forced channel CMU K30 to K34 Special BTS BER loop with with channel setup without test mode channel decoding signalling required decoding BER BTS BSC Forced channel CMU K30 to K34 Special BTS BER loop with setup without and CMU K41 test mode channel de signalling required
3. I 1100 7490 02 PSM B9 PCMCIA type 1 520 MB hard disk O O O 1064 5700 02 ZAA 411 19 rack adapter O O O 1096 3283 00 Comments on table v mandatory optional not applicable Depending on the required frequency band ROHDE amp SCHWARZ GmbH amp Co KG Muhldorfstrasse 15 81671 Munchen Germany P 0 B 8014 69 81614 Munchen Germany Telephone 49 8941 29 0 www rohde schwarz com CustomerSupport Tel 49 1805124242 Fax 4989 4129 13777 E mail CustomerSupport rohde schwarz com 0801 U as Printed in Germany PD757 6091 21 Universal Radio Communication Tester CMU300 Trade names are trademarks of the owners Subject to change Data without tolerances typical values
4. and downlink with packet switched channel coding being active No attach detach functionality is required because no RLC MAC layer is involved 11 TX measurements GMSK Phase and frequency error The actual phase of the signal received from the base station is recorded during the entire burst and stored The trans ferred data is demodulated and the train ing sequence searched for The middle of the training sequence transition between bits 13 and 14 is used for time synchroni zation The complete data content of the burst is then mathematically modulated using an ideal modulator The resulting ideal phase is compared with the measured phase From the difference between the two quantities the phase difference trajec tory a regression line is calculated using the mean square error method The phase error is the difference between the phase difference trajectory and the regression line it is calculated and plotted over the whole useful part of the burst The aver age frequency error in the burst is equal to the derivative of the regression line with respect to time The CMU 300 evaluates the phase error with a resolution of 4 measured values per modulated bit which corresponds to a sampling rate of approx 1 MHz Spectrum measurements The spectrum measurement serves to measure the amount of energy that spills out of the designated radio channel when the base station transmits with prede fined output power The
5. kHz resolution filter 5 pole 100 200 250 400 600 800 1000 1200 1400 1600 1800 kHz 8 50 W from 5 C to 30 C linear degradation down to 25 W at 45 C Mean value of power versus time must be equal or less than allowed continuous power The specifications apply to all cases in which interfering carriers up to the same level as the measured carrier are more than 50 GSM channels away Dynamic range noise correction mode with offset gt 1200 kHz gt 80 dB Spectrum due to switching Level range for full dynamic range RF 1 10 dBm to 47 dBm RF2 4 dBm to 33 dBm RFAIN 22 dBm to 0 dBm Test method absolute measurement max hold over several measurements Filter bandwidth 30 kHz resolution filter 5 pole Measurement at an offset of 400 600 800 1200 1800 kHz Dynamic range noise correction mode with offset gt 1200 kHz gt 80 dB General data Rated temperature range 5 C to 45 C Storage temperature range 25 C to 60 C Humidity 40 C 80 rh non condensing meets IEC 68 2 3 Display 21cm TFT colour display 8 4 Resolution 640 x 480 pixels VGA resolution Pixel failure rate 224107 Electromagnetic compatibility meets requirements of EMC Directive 89 336 EEC EN50081 1 and EN50082 2 Mechanical resistance non operating mode Vibration sinusoidal MIL I 28800 D class 5 5 Hz to 150 Hz max 2 g 99 Hz to 150 Hz 0 5 g const meets DIN IEC 68 2 36 DIN 40046 124 10 Hz t
6. measurement is performed in the time domain mode at a series of frequency points symmetrically distributed all around the nominal fre quency of the designated channel 12 Universal Radio Communication Tester CMU 300 Power measurements The signal power received from the base Station is displayed as a function of time burst analysis over one burst period The measurement graph can be further pro cessed to determine an average mini mum or maximum result as well as to cal culate the average over the whole burst In addition to the burst power measure ment a limit check with tolerances is per formed The displayed continuous mea surement is derived from 668 equidistant measurement points with a 1 4 bit spac ing covering a time range of 156 3 4 bit In the signalling mode only a second application is available the power ver sus slot measurement The power versus slot measurement determines the aver age burst power in all eight timeslots of a TDMA frame The average is taken over a section of the useful part of the burst it is not correlated to the training sequence The result is displayed as eight bar graphs one for each time slot of a single frame providing the possibility of meas uring a very large number of bursts in extremely short time Therefore this appli cation is suitable whenever the behaviour or the stability of the average burst power in consecutive timeslots is to be moni tored Another highli
7. quantities 95 th percentile Limit value below which 95 of the values of a measurement graph are located The 95 th percentile of a measured quantity has the same unit as the quantity itself The CMU 300 determines 95 th percentiles for EVM magnitude error and phase error Origin offset The origin offset in the Q constella tion diagram reflects a DC offset in the baseband signal The origin offset corresponds to an RF carrier feed through Q imbalance Amplitude difference between the in phase I and the quadrature Q com ponents of the measured signal nor malized and logarithmic The Q im balance corresponds to an unwanted signal in the opposite sideband Frequency error Difference between the measured fre quency and the expected frequency For the tolerance check all three phase error graphs can be fitted into a tolerance template and checked Power measurements The 8 PSK power versus time measure ment results are similar to the GMSK measurement results With 8PSK modula tion the time axis is scaled in symbol points 8PSK symbols and GMSK bits have the same transmission rate Owing to the characteristics of 8PSK modulation the amplitude of the RF signal varies according to the data transmitted The average setting ensures that a cor rect reference power is used the results being averaged however over a longer measurement time In data compensated mode a known data sequence i
8. the five GSM software options GSM400 CMU K30 GSM850 CMU K34 GSM900 CMU K31 GSM1800 CMU K32 GSM1900 CMU K33 In this way as an essential feature all GPRS channel coders are available in the CMU 300 The GSM functionalities can be extended to EDGE TX and RX test function ality by means of the CMU K41 software option which also adds EGPRS channel coders The CMU K39 software option allows link setup using the standard call procedures MOC MIC mobile originated terminated call The available hardware options include a highly accurate oven controlled crystal CMU B12 and an As board CMU B71 The latter is needed for BER tests where the bit pattern sent by the CMU 300 Is returned to the CMU300 via the A interface Non signalling mode This mode is particularly suitable for test ing RF boards modules with little or no signalling activity The measurement starts completely independently from external trigger signals or signalling infor mation As soon as RF power is applied to the input the tester starts to sample the incoming RF signal When the corre sponding RF parameters are calculated and displayed the instrument is ready for 8 Universal Radio Communication Tester CMU 300 the next measurement All GSM EDGE specific IX measurements on signals with appropriate modulation scheme and midamble are available In addition the CMU 300 is able to generate signals with GSM EDGE specif
9. 2700 MHz in temperature range 5 C to 45 C 50 MHz to 2200 MHz 2200 MHz to 2700 MHz RF4IN in temperature range 23 C to 35 C 50 MHz to 2200 MHz 2200 MHz to 2700 MHz in temperature range 5 C to 45 C 50 MHz to 2200 MHz 2200 MHz to 2700 MHz lt 100 dBc 1 Hz lt 110 dBc 1 Hz lt 118 dBc 1 Hz lt 50 Hz rms lt 200 Hz peak lt 5 Hz rms lt 0 02 rms 10 MHz to 2 7 GHz zero span to full span 0 1 Hz 10 Hz to 1 MHz in 1 2 3 5 steps gt 100 ms depending on RBW 560 dots horizontal up to 3 absolute relative 1 10 20 30 50 80 100 dB up to 47 dBm 50 W up to 93 dBm 200 W up to 33 dBm 2 W up to 39 dBm 8 W up to 0 dBm lt 0 5 dB lt 0 7 dB lt 1 0 dB lt 1 0 dB lt 0 7 dB lt 0 9 dB lt 1 0 dB lt 1 1 dB Reference level for full dynamic range low noise mode Logarithmic level display RF1 RF2 RF4IN 10 dBm to 47 dBm 4 dBm to 33 dBm 22 dBm to 0 dBm Universal Radio Communication Tester CMU 300 17 Displayed average noise level RBW 1 kHz low noise mode 10 MHz to 2200 MHz 2200 MHz to 2700 MHz Inherent spurious response RF1 RF2 RF4IN lt 100 dBc lt 95 dBc lt 50 dB Low distortion mode f gt 20 MHz to 2200 MHz except 1816 115 MHz Inherent harmonics fa 90 MHz to 2200 MHz up to 7 GHz RF1 RF2 RFAIN lt 30 dB lt 2 dB GSM specifications base station test RF generator Modulation Frequency ran
10. 300 19 Models and options nig j g T o kaolo gt lt z Type Option Description L Order No oe Ele xix W a E ala Ola 2l amp ds co CMU 300 Base unit with following accessories power cord operating manual Ua m 1100 000803 service manual for instrument High stability OCXO aging 3 5 x 10 year Oven crystal with highest long term stability Ensures compliance with tolerances specified by CMU B12 O RG ORN O GSM Used for highly demanding frequency stability requirements to P GSM 11 20 CMU B15 Additional RF connectors I 1100 6006 02 CMU B21 Versatile signalling unit Provides multistandard signalling hardware v ie Y ee YY CMU B71 A interface unit E1 T1 protocol for BER test only of i CMU K30 GSM400 base station signalling non signalling test v a E O ee ee CMU K31 GSM900 and E GSM base station signalling non signalling test v a Y a ee CMU K32 GSM1800 DCS base station signalling non signalling test v a ee O CMU K33 GSM1900 PCS base station signalling non signalling test E o ee CMU K34 GSM850 base station signalling non signalling test v E a eee CMU K39 GSM signalling procedure MOC MTC circuit switched o m eo ae CMU K41 8PSK extension for all CMU K3X packages E oY ee CMU DCV Documentation of calibration values O O O O 0240 2193 08 CMU Z1 30 MB memory card for use with PCMCIA interface
11. C to 45 C 50 MHz to 2200 MHz lt 1 0 dB 2200 MHz to 2700 MHz lt 1 0 dB 50 W in temperature range 5 C to 30 C linear degradation down to 25 W at 45 C Mean value of power versus time must be equal or less than allowed continuous power Calibrated for P gt 33 dBm only in frequency range 800 MHz to 2000 MHz Temperature range 5 C to 23 C or 35 C to 45 C and f 2200 MHz add 0 2 dB RF4IN in temperature range 23 C to 35 C 50 MHz to 2200 MHz 2200 MHz to 2700 MHz in temperature range 5 C to 45 C 50 MHz to 2200 MHz 2200 MHz to 2700 MHz RF level measurement repeatability lt 0 7 dB lt 0 9 dB lt 1 0 dB lt 1 1 dB RF1 RF2 RF4 typical values after 1h warmup Input gt 40 dBm Input lt 40 dBm Level resolution 0 01 dB 0 03 dB 0 1 dB 0 01 dB via remote control Demodulation data of hardware paths Phase noise single sideband f lt 2 2 GHz Carrier offset 20 kHz to 250 kHz 250 kHz to 400 kHz gt 400 kHz Residual FM 30 Hz to 15 kHz CCITT Residual AM CCITT Spectrum analyzer Frequency range Span Frequency resolution Resolution bandwidths Sweep time Display Marker Display line Display scale Level range RF1 Continuous power Peak envelope power PEP RF2 Continuous power Peak envelope power PEP RF4IN continuous power and PEP Level uncertainty RF1 RF2 in temperature range 23 C to 35 C 50 MHz to 2200 MHz 2200 MHz to
12. MHz step 1 kHz 5 x 10 0 5 V to 2 V rms D0 Q BNC connector REFOUT1 10 MHz from internal reference or fre quency at synchronization input gt 1 4 V peak peak 50 Q BNC connector REFOUT2 net specific frequencies in range 100 kHz to 40 MHz gt 1 0 V peak peak 50 Q 100 kHz to 2700 MHz 0 1 Hz same as timebase resolution lt 400 us to Af lt 1 kHz 130 dBm to 27 dBm 130 dBm to 33 dBm 130 dBm to 10 dBm 130 dBm to 16 dBm 90 dBm to 13 dBm 90 dBm to 5 dBm 16 Universal Radio Communication Tester CMU 300 Output level uncertainty RF1 RF2 temperature range 23 C to 35 C gt 106 dBm gt 117 dBm 117 to 130dBm 10 MHz to 450 MHz lt 0 6 dB 450 MHz to 2200 MHz lt 0 6 dB lt 0 6 dB 2200 MHz to 2700 MHz lt 0 8 dB lt 0 8 dB RF1 RF2 temperature range 5 C to 45 C lt 1 5 dB lt 1 5 dB gt 106 dBm gt 117 dBm 117 to 130dBm 10 MHz to 450 MHz lt 1 0 dB 450 MHz to 2200 MHz lt 1 0 dB lt 1 0 dB 2200 MHz to 2700 MHz lt 1 5 dB lt 1 5 dB RF30UT in temperature range 23 C to 35 C 10 MHz to 450 MHz 80 dBm to 10 dBm 450 MHz to 2200 MHz 90 dBm to 10 dBm 2200 MHz to 2700 MHz 90 dBm to 5 dBm RF30UT in temperature range 5 C to 45 C 10 MHz to 450 MHz 80 dBm to 10 dBm 450 MHz to 2200 MHz 90 dBm to 10 dBm 2200 MHz to 2700 MHz 90 dBm to 5 dBm Output level settling time lt 4 us Output level resolution 0 1 dB Generato
13. U 300 special atten tion has been given to achieving maxi mum measurement accuracy and speed for EDGE too All measurement tolerances are set by default to GSM recommenda tion 11 21 but may of course be altered to suit individual needs Modulation analysis For the modulation analysis the actual modulation vector of the signal received from the base station is measured over the complete burst and stored The fol lowing non redundant quantities are cal culated on the basis of a comparison of this vector with the computed ideal signal vector Phase error The phase error is the difference be tween the phases of measured and the ideal signal vector Magnitude error The magnitude error is the difference between the magnitudes of the meas ured and the ideal signal vector Error vector magnitude EVM The EVM is the magnitude of the vec tor connecting the measured and the ideal signal vector In contrast to the previous quantities the EVM cannot be negative These three quantities 14 Universal Radio Communication Tester CMU 300 are calculated as a function of time and displayed over the whole useful part of the burst symbols 6 to 162 each of them in a separate graphical measurement menu In addition the peak and RMS values of all three quantities are calculated over the whole display range or over the first ten symbols only and displayed Finally the modulation analysis provides the following scalar
14. Universal Radio Communication Tester CMU 300 represents a unique com pact test solution based on a general purpose RF generator and RF analyzer in conjunction with a powerful signalling unit The capability to generate and decode signals for different channels in realtime is the key argument for compact one box solutions This is the main pre requisite for bit error rate BER tests and Frame clock IN BTS RAW BER loop burst by burst RF switch ing matrix Demodulator The CMU 300 concept guarantees flexible adaptation to different customer specific test environments plus realtime channel coding decoding capability Frame clock signalling at higher layers the tester is able to simulate the functions of mobile stations The concept of the CMU300 allows easy adaptation to customer spe cific BER test environments Certain BER signal paths are supported Additionally for flexible connectivity to possible RF interfaces of BTSs the tester incorporates a powerful user configur able RF switching matrix Modulator coder Channel decoder Control of BTS setup of i channels BSC PN Interface loop analyzer BTS BER analyzer Universal Radio Communication Tester CMU 300 generator BSC BER BSC BER 3 Key strengths The Radio Communication Tester CMU 300 ensures premium cost effective ness through a variety of features with i extremely fast measurement speed a
15. coding BER IBTS BER loop Forced channel CM K30 to K34 Special BTS DBLER with channel setup without test mode decoding signalling one required without RLC static TS active MAC on up down link BER IBTS BER loop Forced channel CM K30 to K34 Special BIS DBLER with channel setup without and CMU K41 test mode decoding signalling one required without RLC static TS active MAC on up down link Universal Radio Communication Tester CMU 300 Avetage Ches I Eis Cies b Bits 100 Frares T200 7800 Ba 01400 13200 Ext 0 100 ally the instrument itself can be used as a loop on the U air interface which means that it can loop back information from the RF downlink to the uplink includ ing decoding coding The BER result indi cates errors of class Ib Il bits In RBER FER mode the errors of class Ib II bits of non erroneous frames are calculated and furthermore frames with erroneous class la bits are taken into account FER BER test of PDTCHs For packet switched data traffic channels the bit error rate test is modified in sucha way that the BTS loops back the received data packets on a block by block basis loop behind channel decoder required and measures the BER and the data block error rate DBLER The test setup is simi lar to the one which is used on circuit switched channels The test is based on an RF connection where one timeslot is permanently used on the uplink
16. ease see standard specific data on the previous pages for more details and improved accuracy Timebase TCXO Max frequency drift in temperature range 5 C to 45 C Max aging Timebase OCXO option CMU B11 Max frequency drift in temperature range 5 C to 45 C Max aging Warmup time at 25 C Timebase OCXO option CMU B12 Max frequency drift in temperature range 5 C to 45 C with instrument orientation referred to turn off frequency after 2 h warmup time following a 24 h off time at 25 C Max aging Warmup time at 25 C Reference frequency inputs outputs synchronization input Frequency sinewave Squarewave TTL level Max frequency variation Input voltage range Impedance Synchronization output 1 Frequency Output voltage Impedance synchronization output 2 Frequency Output voltage f lt 13 MHz Impedance RF generator Frequency range Frequency resolution Frequency uncertainty Frequency settling time Output level range RF1 100 kHz to 2200 MHz 2200 MHz to 2700 MHz RF2 100 kHz to 2200 Mhz 2200 MHz to 2700 MHz RF30UT 100 kHz to 2200 MHz 2200 MHz to 2700 MHz 1x 10 1 x 10 year 1x 107 2 x 10 year 5 x 10 day after 30 days of operation approx 5 min 5 x 10 referred to 25 C 3 x 107 5x10 3 5 x 10 year 5 x 10 day after 30 days of operation approx 10 min BNC connector REFIN 1 MHz to 52 MHz step 1 kHz 10 kHz to 52
17. echnology For more than 60 years now we are develop ing solutions for our customers The CMU 300 carries on this tradition As a high end communication tester plat form for base stations it completes the Rohde amp Schwarz product portfolio The CMU 300 reflects the long standing expertise Rohde amp Schwarz has gained in the world of mobile communication and base station testing in different fields such as production R amp D commissioning system test service and maintenance The CMU 300 is designed to provide a flexible platform for customized solutions and testing with maximum speed top accuracy and optimum repeatability Its home is the world of digital mobile net works of generations 2 and 2 5 As a today s investment in the future it is pre pared already for 3rd generation testing Ask your local Rohde amp Schwarz repre sentative for a demonstration and help to find out about your requirements The CMU300 can handle a wide range of applications but is primarily optimized for the high accuracy and speed demanded in an ever more quality conscious manufacturing process The picture shows the front panel for desktop use CMU Apis interface CMU B71 CMU BER analyzer Channel decoder CMU BER loop Ea a coder Demodulator CMU RAW BER loop burst by burst generator There are different approaches to testing receiver and transmitter characteristics of modern base stations The
18. ermanent resynchronization to SACCH of TCH Call setup In the signalling mode the CMU 300 is able to provide a mobile simulation optional with mobile originated call MOC mobile terminated call MTC and location update procedures This is nec essary whenever the complete signalling of the BIS air interface is to be tested the BTS is in slow frequency hopping SFH mode or the BIS measurement reports have to be checked During location update MOC and MIC the layer 3 mes sages exchanged between the CMU 300 and the base station are shown on the TFT display The IMEI and IMSI numbers of the simulated mobile CMU 300 must be entered manually no SIM card being used The non signalling GSMs00 Anal yzZer tar 1 mode allows GMSK srm e E EE 8PSK signals to be gen erated and analyzed for RX TX module testing The signalling mode overview menu informs the user quickly and comprehensively about the BTS s TCH RF per formance the hotkeys at the bottom of the screen give immediate access to specific meas urements 5 There are different pos GSMs00 Overview CCH EE Santre sibilities for setting up tienen eee the channel to be mea sured in the Connection Control pop up menu E GSM m Connection Control ah Universal Radio Communication Tester CMU 300 9 RA BER measurements Principles When it comes to receiver characteristics the physical effects appear in the DUT itself so no direct
19. ers have been replaced by context sensitive selection entry and configuration pop up menus which results in a uniquely flat menu structure Thanks to the high resolution of the extremely bright high contrast IFT dis play even the finest details can be dis played To increase speed measurements that are not required can be switched off which frees resources for the measure ment you want to focus on Advanced operational ergonomics have been Incorporated into a most compact package Even with the rackmount kit the CMU 300 does not exceed four height units The base unit incorpo rates generic RF ana lyzer generator func tions The zero span mode of the spectrum analyzer is optimized for all kinds of Freq 1000000000 Mis Tragger F Pome i od r sam oB eee RF signals The spectrum analyzer AR ak mF Spec tri w Canker provides several marker Loo SEALE cre functions for a compre tet Auto 4 2 2007588 Met HE PaE gs Lard Aui ae ooms r B38 ph bln ME MIE A hensive investigation of E the signal applied Marker Universal Radio Communication Tester CMU 300 7 Test modes Tailor made with options The basic version of the CMU 300 already offers signal generator and spectrum analyzer functionality It is converted into a GSM radiocommunication tester transmitter and receiver measurements for GMSK modulation by adding the CMU B21 hardware option signalling unit and at least one of
20. f the performance of the cated to a specific local data acquisition center close to you or volume permitting CMU 300 are explained in more detail and evaluation workload help to keep on your premises A worldwide network of below subsystem performance at an uncompro these standardized automatic calibration mised maximum even if additional mod systems has been implemented in our ser ules are fitted to the CMU 300 mainframe vice centers Highly accurate and repeata ble calibration can be performed wherever you are Your local Rohde amp Schwarz repre sentative offers customized service con tracts for the unit 4 Universal Radio Communication Tester CMU 300 TOLLE f B E C EYETIHA FARIAN Innovative remote processing The novel secondary addressing mode can address similar functions of each of the CMU300 s subsystems different mobile radio standards in an almost identical way Using this type of address ing new remote test sequences can be programmed by a simple cut and paste operation followed by editing specific commands to adapt the control program to the new application Secondary addressing is fully SCPI compliant which means that a subsystem address for example GSM1800 can be replaced by a string denoting a different subsystem another mobile radio standard V1 0008 OF eoceeeeeons eeeeeseeece eeeeeeeee Greatest reliability The keys to the high reliability of t
21. frequency range 10 MHz to 2 7 GHz and several selecta ble resolution bandwidths The zero span mode represents a separate operation group with sophisticated trigger and tim ing functions pre trigger delay time base slope The RF switching matrix is one of the CMU 300 s highlights It is located directly behind the connectors and yields a supe rior VSWR of better than 1 1 2 With 4 flexible N connectors the instrument can be easily adjusted to the DUT Two con nectors RF1 RF2 are configurable as duplex RF interfaces One connector is for high power base stations up to 47 dBm the other one is for micro base stations with a maximum output power of 33 dBm In addition the instrument is equipped with a high power output RF3 OUT up to 13 dBm and a sensitive input RF4 IN 80 dBm to 0 dBm So the power of incoming RF signals can be ana lyzed in the range from 47 dBm down to 80 dBm For receiver tests signals from 130 dBm up to 13 dBm can be gener ated 6 Universal Radio Communication Tester CMU 300 The rear panel reference input and output is the prerequisite for minimizing syste matic frequency errors during measure ment It is fitted as standard Besides the IEEE and RS 232 C interface the base unit is equipped with two PCMCIA slots Operation The instrument can be operated either manually or via the IEC IEEE bus The hierarchical menu structures in conven tional communication test
22. ge GSM400 GSM850 GSM900 GSM1800 GSM1900 Attenuation of inband spurious emissions Inherent phase error GMSK Inherent EVM 8PSK Frequency settling time Output level range GMSK RF1 RF2 RF30UT Output level range 8PSK RF1 RF2 RF30UT Output level resolution Level uncertainty RF1 RF2 P gt 117 dBm in temperature range 23 C to 35 C 9 C to 45 C RF3QUT P gt 90 dBm to 10 dBm GMSK P gt 90 dBm to 6 dBm 8PSK in temperature range 473 G to 35 C 5 C to 45 C RF analyzer Frequency range GSM400 GSM850 GSM900 GSM1800 GSM1900 With option CMU K41 GMSK BxT 0 3 BPSK 450 MHz to 458 MHz 478 MHz to 486 MHz 824 MHz to 849 MHz 876 MHz to 915 MHz 1710 MHz to 1785 MHz 1850 MHz to 1910 MHz gt 50 dB lt 1 rms lt 4 peak lt 2 rms lt 500 us to res phase of 4 130 dBm to 27 dBm 130 dBm to 10 dBm 90 dBm to 13 dBm 130 dBm to 31 dBm 130 dBm to 14 dBm 90 dBm to 9 dBm 0 1 dB lt 0 5 dB lt 0 7 dB lt 0 7 dB lt 0 9 dB 460 MHz to 468 MHz 488 MHz to 496 MHz 869 MHz to 894 MHz 921 MHz to 960 MHz 1805 MHz to 1880 MHz 1930 MHz to 1990 MHz 18 Universal Radio Communication Tester CMU 300 Measurement bandwidth in measurement menus 000 kHz Power meter frequency selective Level range RF1 Continuous power Peak envelope power PEP RF2 Continuous power Peak envelo
23. ght of this measure ment is the fact that power results are available almost in realtime The power versus time measurement however returns the current average maximum and minimum value within a statistic cycle The power versus slot e SM 500 Power TCH j g pe measurement provides _ information about 8 power steps simultane a Exp Pomer 40 aim Lomi Noses ously The signalling mode provides timeslot selec tive measurements for power and modulation analysis Due to the FFT approach the spectrum analysis can be performed at ae er gps aga by Liaw hori TS o eee paara freee i uistior unprecedented speed oo m2 fd oe ww LI a i Ld 16T fH 16 t4 t3 A0 08 06 Oa 67 Universal Radio Communication Tester CMU 300 13 TX measurements SPSK 8PSK EDGE is another step towards increasing the mobile radio data rate By using the available GSM frame structure the gross data rate is three times that obtained with GMSK The CMU 300 can already perform 8PSK on GSM bursts and analyze them thanks to advanced mea surement applications Error vector mag nitude and magnitude error have been added to the range of modulation mea surements New templates for power ver sus time measurements ensure compli ance with the specifications as do the modified tolerances for spectrum mea surements As with all measurements provided by the CM
24. he CMU 300 are the low power intake and the innovative cooling concept Less power means less heat Power consump tion is way below 200 W due to specially selected low power components the minimum component count concept plus low voltage design wherever possible The CMU 300 employs an ultra effective heat management between housings and individual components as well as between heat sinks and air flow Inde pendent cooling cycles for the front mod ule controller the power supply unit and the RF frontend add up to an optimized cooling system l far A Modularity Modular hardware and software concept provides easy extension to enhanced functionality Bullet proof Low component count low power con sumption and effective heat conduction result in unparalleled reliability Future proof Easy migration to future standards Universal Radio Communication Tester CMU 300 5 Base unit As the CMU 300 has a modular architec ture the base unit comes without any network or standard specific hardware and software The base unit can be used for testing the general parameters of RF modules at early production stages Con stituent parts of the CMU 300 base unit are the RF generator and RF analyzer which are completed by a versatile net work independent time domain menu and a comprehensive spectrum analyzer Besides the convenient operational con cept the spectrum analyzer stands out for a continuous
25. ic midamble and modu lation in the entire frequency range from 10 MHz to 2 7 GHz The analyzer and gen erator functionalities are not linked i e any channel spacing between uplink and downlink signals is possible Signalling mode The signalling mode is provided for test ing modules or base stations supporting a certain level of signalling In this mode the tester operates synchronously to the BIS i e it is synchronized to the TDMA frame structure which is vital for receiver bit error rate measurement All transmit ter parameters can be tested separately for each timeslot This function is neces sary for testing base stations that support both GSM and EDGE The ability to code decode channels in realtime is the basis for synchronized measurements The instrument can be synchronized to the base station in the following ways Ifthe BIS has a multiframe clock out put the signal can be used to trigger the CMU 300 An additional trigger line has to be taken into considera tion For BER tests and EDGE IX tests the 26 multiframe trigger is required f only the RF connection is used the tester can synchronize to the CO carri er of the base station just like a mo bile phone This simplifies the test setup However a CCH carrier includ ing FCCH SCH channels and system information 1 to 4 must be activated in the BIS before measuring the used traffic channel After successful synchronization there is p
26. measurement Is possi ble The GSM standardization committees therefore defined test methods for mea suring the receiver characteristics of GSM EDGE BTSs According to these test methods there are two logical reference points inside the BTS where the receiver quality must be defined These reference points are located behind the demodula tor and behind the channel decoder The basic principle of bit error rate BER test ing is simple The CMU 300 sends a data stream to the BTS which then sends it back to the tester loop i e the signal to be analyzed is forwarded from the refer ence point inside the BTS to the external BER analyzer by means of different loops The CMU 300 compares the sent and received uncoded data bits to determine the number of bit errors Two essentially different loops are used L BER analyzer ah BER analyzer Channel ou Linnea The BIS is set to close its RF loop di rectly after the logical reference points The received data is returned on the RF downlink path The benefit of this measurement principle is that no extra cabling is needed besides the ordinary RF connection This ap proach is an easy way of testing the most important GSM EDGE channel types Using the A loop the decoded signal is forwarded to the BER analyzer via the Ap output of the BTS This test path is often required when there is no possibility for loop activation inside the BIS Absolute receiver sensi
27. nd very high accuracy being the two most important ones In addition the second ary remote addressing of the unit s mod ular architecture makes for intelligent E g m RF and autonomous processing of complete cate hal _ P din Mei Lees Anii 3 i Fi m a Pii l measurement tasks and fast control pro Ho i p ian E a G ee iiae gram design Greatest accuracy In a production environment the unit s a iz high accuracy allows DUTs devices Marke pa to be tested for optimal Faki plat Prd Abner Nhe mobile network performance In the lab the CMU 300 enables the development engineer to replace conventional dedi cated premium quality instruments more often than any other radio communica tion tester and save desktop space at the same time High precision measurement correction over the whole frequency and dynamic range as well as compensation for temperature effects in realtime are Greatest speed ProbeDSP technology critical factors for achieving the CMU 300 s excellent accuracy The high processing speed is due to The modular architecture relies on decen extensive use of ProbeDSP technology tralized ProbeDSP processing coordi The new globally standardized parallel measurements and innovative nated by a powerful central processor Rohde amp Schwarz calibration system can remote command processing These Like an oscilloscope probe DSPs dedi check the CMU300 s accuracy in a service three aspects o
28. o 300 Hz acceleration 1 2 g rms Vibration random meets IEC68 2 6 IEC1010 1 EN61010 1 Shock Electrical safety Power supply Power consumption Base unit With typical options Dimensions W x H x D Weight Base unit With typical options meets DIN IEC 68 2 27 MIL STD 810D 40 g shock spectrum EC1010 1 DIN EN61010 1 UL3111 1 CSA22 2 No 1010 1 100 V to 240 V 10 AC 3 1 A to 1 3A 50 Hz to 400 Hz 5 to 10 power factor correction EN61000 3 2 130 W 180 W 465 mm x 193 mm x 517 mm 19 4 height units 14 kg 18 kg Inputs and outputs rear panel IF3 RX CH Z 00 Q BNC female max level 2 dB 10 7 MHz IEC IEEE bus remote control interface according to IEC 625 2 IEEE 488 2 Connector Serial interface Printer interface LPT Mouse connector Connector for ext monitor VGA 24 pin Amphenol female RS 232 C COM 9 pin sub D connector parallel Centronics compatible PS 2 female 15 pin sub D connector DE 10 200 400 600 800 1000 1200 1400 1600 1200 2000 I i 2200 2400 2700 PHT 4 Rohde amp Schwarz specifications are a conservative view of what a product has to offer As an example the diagram shows the accuracy of the peak power measurement at 0 dBm via RF In Out for 10 randomly chosen test sets at 25 C The tolerance marks above and below indicate the data pointed out in this data sheets general data section Universal Radio Communication Tester CMU
29. pe power PEP RF4IN continuous power and PEP Level uncertainty RF1 RF2 RF4IN in temperature range 423 C to 35 C 5 C to 45 C Level resolution Modulation analysis Level range PEP RF1 RF2 RFAIN Inherent phase error GMSK Inherent EVM 8PSK Frequency measurement uncertainty Burst power measurement 40 dBm to 47 dBm 50 W 03 dBm 200 W 54 dBm to 33 dBm 2 W 39 dBm 8 W 80 dBm to 0 dBm lt 0 5 dB lt 0 7 dB 0 1 dB 0 01 dB via remote control 6 dBm to 53 dBm 20 dBm to 39 dBm 60 dBm to 0 dBm lt 0 6 rms lt 2 peak lt 1 0 rms lt 10 Hz drift of timebase Reference level for full dynamic range GMSK low noise mode RF1 RF2 RF4IN Dynamic range GMSK 10 dBm to 53 dBm 4 dBm to 39 dBm 22 dBm to 0 dBm gt 2 dB BW 500 kHz rms Reference level for full dynamic range 8PSK low noise mode RF1 RF2 RF4IN Dynamic range Relative measurement uncertainty Result gt 40 dB 60 dB lt result lt 40 dB Resolution Spectrum due to modulation Level range for full dynamic range RF1 RF2 RFAIN Test method Filter bandwidth Measurement at an offset of 6 dBm to 49 dBm 8 dBm to 35 dBm 26 dBm to 4 dBm gt 69 dB BW 500 kHz rms lt 0 1 dB lt 0 5 dB 0 1 dB in active part of burst 10 dBm to 47 dBm 4 dBm to 33 dBm 22 dBm to 0 dBm relative measurement averaging 30
30. r RF level repeatability RF1 RF2 RF3 typical values after 1h warmup Output gt 80 dBm 0 01 dB Output lt 80 dBm 0 1 dB VSWR RF1 10 MHz to 2000 MHz lt 1 2 2000 MHz to 2200 MHz lt 1 3 2200 MHz to 2700 MHz lt 1 6 RF2 10 MHz to 2200 MHz lt 1 2 2200 MHz to 2700 MHz lt 1 6 RF30UT 10 MHz to 2200 MHz lt 1 5 2200 MHz to 2700 MHz lt 1 7 Attenuation of harmonics f 10 MHz to 2200 MHz up to 7 GHz REI REZ gt 30 dB RF30UT P lt 10 dBm gt 20 dB Attenuation of nonharmonics 10 MHz to 2200 MHz at gt 5 kHz from carrier gt 40 dB Phase noise single sideband f lt 2 2 GHz Carrier offset 20 kHz to 250 kHz lt 100 dBc 1 Hz gt 250 kHz lt 110 dBc 1 Hz Residual FM 30 Hz to 15 kHz lt 50 Hz rms lt 200 Hz peak CCITT lt 5 Hz rms Residual AM CCITT lt 0 02 rms 10 modulation Data for frequency offset range 0 kHz to 135 kHz Carrier suppression gt 40 dB 1 Valid for RF1 only 2 Not valid at frequencies of net clock harmonics lt 1 5 dB 21 508 lt 0 8dB lt 0 8 dB lt 1 0dB lt 1 0dB lt 1 0dB lt 1 5dB RF analyzer VSWR RF1 10 MHz to 2000 MHz zi 2000 MHz to 2200 MHz lt 1 3 2200 MHz to 2700 MHz lt 1 6 RF2 10 MHz to 2200 MHz lt l 2200 MHz to 2700 MHz lt 1 6 RF4IN 10 MHz to 2200 MHz lt 1 5 2200 MHz to 2700 MHz lt 1 6 Power meter wideband Frequency range 100 kHz to 2700 MHz Level range RF1 Continuous power 100 kHz to 2200 MHz 6 dBm to 47 dBm 50 W 2200 MHz
31. s used to correct the measured average power of the current burst and estimate the correct reference power Exp Power 14 0 dBm Laele Freg Cresed GOD er Chan Freq wee a D MS Jp Narma th cm eT 713 dim OOO Sra 23 Se GB 15 af E l h T E E F i ll ii er Different graphical functions marker limit line are available for power versus time measurement 125 09 Og 18 16 OTs OT 11 43 05 5 05 15 41 1 O4 04 623 a 63 5 uo 61 18 637 a itr 4 bie The error vector magnitude hotkey gives access to the graphical display Via BTS multiframe trigger Via RF synchronization procedure to CCH Without call procedure simulation of mobile station including location update and MOC MIC call procedures Phase frequency error GMSK EVM including magnitude error origin offset I O imbalance 8PSK Power versus time Power versus slot GMSK Peak power average burst power General spectrum measurements RAW BER BER RBER FER measure ments on circuit switched channels BER DBLER measurements on packet switched channels Realtime channel coding decoding Timeslot selective measurements in signalling mode Flexible RF interface for easy adapta tion to DUT BTS loop without channel coding BTS loop with channel coding Loop via A interface CMU as RF loop with channel coding Universal Radio Communication Tester CMU 300 15 Base unit specifications Pl
32. tivity Based on realtime BER capability the user can directly vary the transmitter level dur ing the test by means of numerical entry or the spinwheel This is a fast and easy way to determine absolute receiver sensi tivity Apis loop BER RBER FER RAW BER BER test environment 10 Universal Radio Communication Tester CMU 300 Receiver stress test For this application the CMU 300 provides different transmitter levels for the active timeslot and for the unused timeslots dummy bursts The receiver in the BIS can thus be subjected to unfavourable conditions in the unused timeslots Pseudo random bit streams The tester uses a choice of four true pseudo random bit sequences for BER measurement You will especially appre ciate this feature if you have ever over looked a faulty channel coder by using a fixed bit pattern because a pseudo ran dom sequence is the only reliable means of detecting it For transmitter measure ments the BTS RF loop can also be kept closed outside BER measurements This is a simple way of providing the transmitter signal modulated with pseudo random bits required for spectrum and power measurements RAW BER test In the burst by burst mode the CMU300 transmits only bits without error protec tion like class II bits The loop in the BTS under test has to be closed before chan nel decoding coding so raw bits are measured and the BER Is evaluated on a burst by burst basis
33. to 2700 MHz 10 dBm to 47 dBm 50 W Peak envelope power PEP 53 dBm 200 W RF2 Continuous power 100 kHz to 2200 MHz 8 dBm to 33 dBm 2 W 2200 MHz to 2700 MHz 4 dBm to 33 dBm 2 W Peak envelope power PEP 39 dBm 8 W RF4IN continuous power and PEP 100 kHz to 2200 MHz 33 dBm to 0 dBm 2200 MHz to 2700 MHz 29 dBm to 0 dBm Level uncertainty F1 10 dBm to 20dBm 20dBm to 47 dBm 50 MHz to 2700 MHz lt 1 0 dB lt 0 5 dB 4 dBm to 6 dBm 6 dBm to 33 dBm 50 MHz to 2700 MHz lt 1 0 dB lt 0 5 dB RF4IN 29 dBm to 19 dBm 19dBm to 0dBm 10 MHz to 2700 MHz lt 1 5 dB lt 0 8 dB Level resolution 0 1 dB 0 01 dB via remote control Power meter frequency selective 10 MHz to 2700 MHz 0 1 Hz 10 Hz to 1 MHz in 1 2 3 5 steps Frequency range Frequency resolution Resolution bandwidths Level range RF1 Continuous power 10 MHz to 2200 MHz 40 dBm to 47 dBm 50 W 2200 MHz to 2700 MHz 34 dBm to 47 dBm 50 W Peak envelope power PEP 53 dBm 200 W RF2 Continuous power 10 MHz to 2200 MHz 54 dBm to 33 dBm 2 W 2200 MHz to 2700 MHz 48 dBm to 33 dBm 2 W Peak envelope power PEP 39 dBm 8 W RF4IN continuous power and PEP 10 MHz to 2200 MHz 80 dBm to 0 dBm 2200 MHz to 2700 MHz 74 dBm to 0 dBm Level uncertainty RF1 RF2 in temperature range 23 C to 35 C 50 MHz to 2200 MHz lt 0 5 dB 2200 MHz to 2700 MHz lt 0 7 dB in temperature range 5
Download Pdf Manuals
Related Search