Honolulu, HI IMS 2007 June 5, 2007 Rohde & Schwarz today publicly demonstrated for the first time its R&S FMU36 baseband analyzer, which combines comprehensive spectrum analysis and vector signal analysis capabilities in a single instrument. The R&S FMU36 makes it fast and easy for designers of chipsets for mobile phones and wireless base stations, Bluetooth, ZigBee, and RFID to characterize their devices at baseband with a single instrument. The FMU36 incorporates a FFT-based spectrum analyzer that has a 36-MHz I/Q bandwidth, 50 and 1 Mohm analog balanced/unbalanced baseband inputs, and a time-domain analyzer. The instrument has a noise floor of less than 4 nV (1 Hz bandwidth), I/Q imbalance of less than 0.1 dB, signal-to-noise ratio greater than 143 dB, and level uncertainty of less than 0.25 dB. The instrument also functions as a vector signal analyzer with a maximum symbol rate of 25 MHz, and its standard 16-Msample I and Q memory can be increased to 705 Msamples. The FMU36 accommodates most popular communications access methods including WCDMA, HSDPA, GSM/GPRS/EDGE, IEEE 802.15.4 ZigBee, RFID, and Bluetooth. It has two analog inputs that can be operated either as single-ended or balanced, and their impedance can be set to 50 ohms or 1 Mohm to match the impedance of the device under test. When using probes to connect to the device under test, the R&S FMU36 provides a calibration source to minimize the probes effect on the measurement results. The R&S FMU36 provides a full complement of capabilities including markers (delta, noise, and phase noise), measurement functions for adjacent channel power, carrier-to-noise, third-order intercept point, occupied bandwidth, and modulation depth, and trace operations such as average, and maximum or minimum hold. Detectors include RMS, average, sample, and positive and negative peak, and filters are available from 0.5 Hz to 20 MHz in 1-2-3-5-10 steps. Supported windowing functions include flat-top, Gaussian, rectangular, Hamming, Hanning, and Chebyshev. Measurement points/trace is selectable between 155 and 30,001. To measure frequency selectively, the measurements can provide very useful information in the time domain concerning a weak pulsed signal that is close in frequency to a strong signal. The pulsed signal can be filtered out and the pulse duration and power can easily be measured. Center frequency and resolution bandwidth can be set independently. With an I and Q time-capture memory of 16 Msamples (optionally 235 or 705 M samples), the R&S FMU36 can capture long sequences, equating to more than 8.5 s at the maximum sampling rate of 81.6 MHz. Before the signal is stored in memory, it is resampled to optimize memory usage. With a WCDMA signal, 100 consecutive frames can be stored for later analysis, and with a GSM signal, the memory can store more than 3,500 frames. The data can then be analyzed either in the firmware or on external analysis tools. The R&S FMU36 baseband analyzer is available now from Rohde & Schwarz.