R&S®SZU100A IQ Upconverter

The R&S®SZU100A delivers high performance during signal generation to master even the most challenging of applications.

High performance for challenging applications
R&S®SMZ100A I/Q upconverter test setup

Field-proven design as a flexible RF head
The R&S®SZU100A I/Q upconverter is designed as a remote RF head for the R&S®SMW200A vector signal generator. Signals generated with the R&S®SMW-B9 wideband baseband option are supplied to the R&S®SZU100A via analog I/Q (single-ended or differential). At the same time, the R&S®SMW200A also supplies the LO signal for the I/Q upconverter via its RF output. A USB connection is used to control the R&S®SZU100A

Its design as an RF head allows the R&S®SZU100A to be positioned closely to the DUT, minimizing the need for RF feed lines and the associated line losses. The shorter feed lines also reduce the level ripple over the frequency. Versatile mounting points and adjustable feet provide flexibility when positioning the R&S®SZU100A in the test setup. The WR15 waveguide connector permits direct mounting of the DUT or an antenna for over-the-air measurements.

High frequency and large bandwidth
With an adjustable center frequency of 58.32 GHz to 64.80 GHz and ±1 GHz RF modulation bandwidth, the R&S®SZU100A is suited to a number of applications in the mmWave range. When the upconverter is used together with the R&S®SMW200A , users can generate up to 2 GHz wide test signals, e.g. for airborne radar or tank radar, for inter-satellite links or terrestrial point-to-point communciations (backhaul/fronthaul) or for 5G or WLAN IEEE 802.11ad.

High output power and wide dynamic range
The R&S®SZU100A comes equipped with an integrated amplifier and an integrated electronic attenuator. With a specified maximum output power of +5 dBm (PEP) but typically greater than +10 dBm (PEP), the power reserve is sufficient to compensate for the increased cable or over-the-air path loss in test setups in the 60 GHz band. The electronic attenuator precisely sets the level to even less than –80 dBm. The solid-state design is synonymous with high level repeatability, fast setting times and exceptional reliability. When using the R&S®SZU100A, test engineers can perform sensitivity measurements without changing the test setup. The integrated level detector at the output of the R&S®SZU100A, which is based on the same technology as the precision power sensors from Rohde & Schwarz, ensures a clearly defined output level.

Easy upgrading of the R&S®SMW200A
The R&S®SZU100A is an easy upgrade that transforms the R&S®SMW200A into a mmWave vector signal generator. Any R&S®SMW200A equipped with the R&S®SMW-B9 wideband baseband option can operate the R&S®SZU100A. The 3 GHz variant of the signal generator is a cost-effective basis for a complete mmWave test solution

Multichannel operation
The R&S®SMW200A vector signal generator can optionally be equipped with two channels. This makes it possible to conveniently test frequency-converting components and modules using a single instrument. With an additionally connected R&S®SZU100A I/Q upconverter, the dual-channel R&S®SMW200A simultaneously supplies the high-frequency mmWave signal (via the connected R&S®SZU100A) as well as a low-frequency IF or LO signal (up to 20 GHz) via its second, synchronized channel.

Furthermore, the R&S®SMW200A and R&S®SZU100A combo is a perfect solution for multichannel applications such as beamforming or MIMO in the mmWave range. Whenever required, a dual-channel R&S®SMW200A operates two R&S®SZU100A upconverters in parallel via singleended I/Q saving test station space, while offering maximum usability.

Here, too, the two signal paths can be precisely synchronized in time, frequency and phase. The internal trigger system of the R&S®SMW200A ensures a stable time reference. Via the internal 10 MHz reference of the R&S®SMW200A , the two paths are coupled. The R&S®SMW-B90 phase coherence option synchronizes the phase of the two connected R&S®SZU100A units, if necessary.

  • Flat frequency response of < 2.0 dB
  • Fully characterized in factory
  • No need for external frequency response correction
  • Exceptional spectral purity
    • Harmonics, nonharmonics and subharmonics better than –50 dBc (level > –40 dBm)
    • Wideband noise –146 dBm (1 Hz) or better
  • Excellent modulation quality
    • EVM for WLAN IEEE 802.11ad at 60.48 GHz better than–32 dB (meas.)
Reliable results due to outstanding signal quality

Measurement results are only as reliable as the measuring equipment that is used. With the R&S®SZU100A, users have a measuring instrument that provides excellent signal quality and conclusive results.

Automatic frequency response compensation
Rohde & Schwarz fully characterizes every R&S®SZU100A I/Q upconverter during the production process and programs it with appropriate correction values. During measurements, the R&S®SMW200A applies these corrections automatically without requiring any special user interaction. At every level and every frequency, the R&S®SZU100A always offers a flat frequency response of < 2.0 dB over 2 GHz bandwidth, although typically the R&S®SZU100A is even better. This eliminates the need for time-consuming external calibration procedures that are required prior to every measurement with conventional mixer setups.

Exceptional spectral purity
The R&S®SZU100A features exceptional spectral characteristics. The sophisticated synthesizer design developed by Rohde & Schwarz ensures that both image sidebands and spurs are effectively suppressed across the entire wanted frequency band. Harmonics and nonharmonics are attenuated with more than 50 dBc.

When using an R&S®SMW200A equipped with the R&S®SMW-B22 enhanced phase noise performance option, the phase noise at 60.48 GHz with 20 kHz offset is exceptionally low with a typical value of just –102 dBc (1 Hz). With the amplifier turned off, the wideband noise lies in the thermal noise range of about –174 dBm (1 Hz) and therefore does not influence even complex sensitivity measurements..

Excellent modulation quality
High-quality, wideband-modulated test signals are essential, especially for communications standards such as 5G or WLAN IEEE 802.11ad. This is the only way to reliably assess receiver performance.

The R&S®SZU100A upconverter excels thanks to its outstanding modulation quality. For example, 16QAM modulated WLAN IEEE 802.11ad signals are generated at a carrier frequency of 60.48 GHz with an EVM of better than –32 dB (meas.). The electronic attenuator on the R&S®SZU100A provides a consistently good signal-tonoise ratio even at low power levels. As a result, the excellent modulation quality is maintained almost without change – also at low levels.

Fast and convenient operation

A short time to market is the key to the commercial success of a product. The R&S®SZU100A makes everyday measurement tasks simpler, effectively speeding up the development process.

R&S®SMW200A GUI with seamlessly integrated R&S®SZU100A.

Easy operation
The R&S®SZU100A fits seamlessly into the operating concept of the R&S®SMW200A. As soon as the upconverter is connected to the R&S®SMW200A via the USB, I/Q and RF connectors, the R&S®SMW200A is converted into a vector signal generator for mmWave applications.

An integrated connection test ensures that all cables are connected correctly. All functions are controlled directly via the graphical user interface on the R&S®SMW200A that is familiar to users of vector signal generators. Standard functions such as the direct signal configuration on the R&S®SMW200A, the context-sensitive help and the graphical display of the generated signal support users in their tasks. All this makes the R&S®SZU100A especially easy to use.

Remote operation and automation
The R&S®SMW200A, and therefore the R&S®SZU100A upconverter, can be controlled via all common remote control interfaces.

R&S®SZU100A users benefit from the versatile remote control functions of the R&S®SMW200A vector signal generator such as the built-in SCPI macro recorder and the function for highlighting any changes to the preset state. Drivers for all key programming environments (MATLAB®, CVI, LabView, VXIplug&play, IVI) are available. With almost no additional effort, remote control programs for the R&S®SMW200A also support the upconverter, minimizing the automation effort for the R&S®SZU100A.

Turbo speed for the development process
The R&S®SZU100A is fully calibrated at the factory and its frequency response is automatically corrected by the R&S®SMW200A on the fly during operation. This eliminates the need for an external calibration of the test setup before a measurement, such as is typically required by other solutions. The automatic frequency response correction is independent of the wanted signal, level and frequency, eliminating the need for time-consuming calibrations and computational precorrection of waveforms in day-to-day operation.

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