r&s®smu200a vector signal generator | features & benefits -九游官网下载

owing to the sophisticated multiloop synthesizer concept, the r&s^®smu200a features extremely low ssb phase noise and wideband noise. a high-stability oven-controlled reference oscillator is installed as standard, which provides excellent aging characteristics as well as minimum temperature drift. the r&s^®smu200a is ideal, for instance, for lo or vco substitution.

amplifiers of 3gpp base stations require very good adjacent channel leakage ratio (aclr) performance in order not to impair the adjacent channels of the transmission. to test this feature, the aclr characteristics of the signal generator must be better than those of the amplifier. presently, multicarrier power amplifiers are increasingly used. in this case, not only one but several neighbouring signals in the frequency range are amplified. testing such amplifiers places even higher demands on signal generator capabilities. the outstanding aclr characteristics of the r&s^®smu200a more than qualify the generator for this task.

when external i/q signals are applied, the r&s® smu200a features an rf bandwidth of 200 mhz. if the internal baseband is used, an rf bandwidth of 80 mhz is available, which is ideal for testing multicarrier amplifiers. the r&s® smu200a is thus well prepared for future broadband systems.

the r&s® smu200a offers highly accurate output power of up to 13 dbm (pep). a wear-and-tear-free electronic attenuator is used in the full level range. with the aid of the high-power output option, the output power can be increased to 26 dbm (pep) in the overrange.

digital alc implemented in the r&s® smu200a together with a detector operating at constant temperature ensures high level linearity and repeatability. alc may be on for most kinds of complex signal scenarios.

the standards of the third mobile radio generation set considerably higher demands on signal generator functionality. because of their good rf characteristics and their flexibility, signal generators are the instrument of choice particularly when base stations are tested. the universal coder in the baseband generator of the r&s^®smu200a has been designed for easy implementation of new standards. the r&s^®smu200a is therefore well prepared for present and future mobile radio standards.

in the case of 3gpp fdd, the r&s® smu200a can generate up to four code channels in realtime. up to four base stations with 128 code channels each or four mobile stations can be simulated. this allows any configuration to be set, from reference measurement channels in line with 3gpp ts 2 5.141 or ts 2 5.101 up to complex code channel scenarios for traffic simulation in the mobile radio network.

furthermore, the r&s® smu200a supports the mobile radio standards lte, lte-advanced, gsm/edge/edge evolution, td-scdma, cdma2000, as well as the wireless standards wlan ieee 802.11 a/b/g/n/ac, and many more. for more information, see the pages of the respective options (section digital modulation systems in the options tab).

all the strengths of the two-path concept of the r&s^®smu200a become especially evident in the field of mobile radio. since the baseband section of the r&s^®smu200a is fully digital, the signals of the two baseband generators can be easily added without synchronization problems and without an external coupler or additional equipment being required. a frequency offset and the relative power of each signal can be accurately set.

for receiver tests in multicarrier base stations with complex interfering signals, one baseband generator can produce the test signal to be evaluated. the second baseband generator produces a suitable multicarrier signal to be used as the background signal. two transmit antennas (the transmit diversity) of a base station can also be simulated. up to now, two signal generators have been required in this case, but only one instrument is needed when the r&s^®smu200a is used.

if the rf section is furthermore equipped with two paths, any requirement can be met. for instance, the wanted signal and the interfering signal needed for receiver tests can be generated with one instrument – even if the signals greatly differ in power and frequency offset as is the case when out-of-band blocking measurements are to be performed.

short turnaround times and short test times are important particularly for automatic test sequences in production. short setting times of a signal generator mean money in hand. the r&s^®smu200a with its very short frequency setting time of <2 ms meets all requirements. in the list mode, where frequency variations have previously been stored in a list, the setting time is reduced to <450 μs. a built-in electronic attenuator ensures wear-and-tear-free switching. this prevents down-times for replacing mechanical attenuators.

the r&s^®smu200a is remote-controlled via gpib or lan. when the windows remote desktop is used, the instrument can be remote-operated from a pc.

an external keyboard and a mouse or memory stick can be plugged to the usb connectors on the front panel. two marker outputs that can be used as required and a trigger input are available in addition.

owing to its modular design, the r&s^®smu200a is a safe investment. options can be added any time. this concept allows the r&s^®smu200a to be tailored to specific applications.