Rohde & Schwarz FSQ26 26.5GHz Signal Spectrum Analyzer

Rohde & Schwarz FSQ26 Spectrum Signal Analyzer

R&S FSQ Signal Analyzer-At a glance

The R&S®FSQ is the solution for all development and production measurement tasks. It offers very low phase noise, unsurpassed low residual EVM, a wide dynamic range and above-average accuracy, making it the ideal high-end measuring instrument for development applications, where tolerances and limit values must often be lower than defined in a standard. 

The ̧FSQ combines the outstanding spectrum ana-lyzer features and functions of the ̧FSU with those of a wideband signal analyzer. Due to its large analysis band-width of up to 120 MHz (R&S®FSQ‑B72), the R&S®FSQ is the right instrument for measuring broadband signals (e.g. WLAN, IEEE 802.11n/ac, 3GPP LTE or 3GPP WCDMA multicarrier signals), for determining amplitude statistics with the CCDF measurement and for measuring modula-tion accuracy or code domain power. Equipped with the R&S®FSQ‑B71 option, the R&S®FSQ can analyze signals in the analog baseband, and even in the digital baseband if the R&S®FSQ‑B17 option is used.

Model overview

R&S FSQ3                    20 Hz to 3.6 GHz

R&S FSQ8                    20 Hz to 8 GHz

R&S FSQ26                  20 Hz to 26.5 GHzR

FSQ40                           20 Hz to 40 GHz

Key facts

Frequency range from 20 Hz to 3.6/8/26.5/40 GHz

 28 MHz signal analysis bandwidth, optionally 120 MHz

Outstanding RF characteristics                                                                                                                                                                                           TOI typ. +25 dBm                                                                                                                                                                                                                1 dB compression point +13 dBm                                                                                                                                                                                       84 dBc ACLR/3GPP with noise correction                                                                                                                                                                           –173 dBm (1 Hz) displayed average noise level (DANL) with noise correction and R&S®FSU‑B24 preamplifier

Analysis of signals in the analog and digital baseband

Numerous firmware applications extending the signal analysis capabilities

16 Msample I/Q memory, expandable up to 705 Msample

Benefits and key features

Excellent RF performance for demanding applications

Outstanding RF features

84 dB ACLR for 3GPP with noise correction

77 dB ACLR for 3GPP multicarrier signals (four adjacent carriers)

TOI > +20 dBm, typ. +25 dBm

1 dB compression +13 dBm

Displayed average noise level (DANL) typ. –173 dBm using noise correction (1 Hz bandwidth) and R&S®FSU‑B24 preamplifier

Phase noise –160 dBc (1 Hz) at 10 MHz carrier offset■Phase noise –133 dBc (1 Hz) at 10 kHz carrier offset

Signal and spectrum analysis in a single instrument

Signal analysis with up to 120 MHz bandwidth

Signals from RF, analog or digital baseband

Up to 705 Msample (I and Q)

Low phase/frequency response

User‑definable sample rate

Best signal fidelity for modulation analysis

Ready for analysis of multistandard, multicarrier transmitters

Wide range of functions

With its wide range of functions, the R&S®FSQ is practi-cally unparalleled on the spectrum analyzer market. Even the base unit includes all important functions:

Channel filters from 100 Hz to 5 MHz❙ RRC filters

1 Hz to 50 MHz resolution bandwidth (RBW)

Number of measurement points/trace selectable between 155 and 30 001

Time‑selective spectrum analysis with gating function❙ Up to 80 measurements/s in manual mode

SCPI‑compatible GPIB command set

GPIB command set compatible with the ̧FSE/ ̧FSIQ and legacy HP spectrum analyzer

Fast ACP measurement in time domain

Statistical signal analysis with CCDF function❙ RMS detector

Transducer factor for correcting antenna or cable frequency responses

Harmonic distortion measurement function

Spurious emission measurements with up to 1 00 001 points, in up to 20 segments

External reference from 1 MHz to 20 MHz in 1 Hz steps❙ LAN interface 100BaseT (1 Gbit)

16 Msample I and Q memory

Outstanding RF features

The dynamic range performance of a spectrum analyzer is mainly defined by three parameters:

Noise level

Intermodulation performance (TOI)

Phase noise

The R&S FSQ excels in all of these three categories.Its wide dynamic range comes in handy when solving difficult measurement problems.

The inherent noise level of the R&S FSQ can be reduced by using noise correction. The instrument measures its own noise in the active operating mode, and then uses signal processing to remove the noise from the trace, enabling measurement of weak signals close to the thermal noise.

Measurement of nonharmonics (spurious) on base station signals without an additional filter is made possible by the extremely low phase noise, particularly far away from the carrier.

The high harmonic second-order intercept point means optimum dynamic range for multichannel cable TV measurements.

For 3GPP adjacent‑channel power measurements, a figure of 84 dB ACLR with noise correction allows very good adjacent‑channel power ratios to be verified and dem-onstrated very simply and with high accuracy. A higher‑ performance NodeB can therefore be built and tested.

Signal analysis with up to 120 MHz bandwidth

The R&S FSQ combines dedicated processing hardware and the outstanding spectrum analyzer features and function of the R&S FSU with a demodulation and analysis bandwidth that has been enhanced to 120 MHz.

Best signal fidelity for modulation analysis

The R&S FSQ determines the linear distortion in the RF and IF paths with the aid of the built‑in calibration source and corrects such distortion online using a compensation filter. Moreover, the bandwidth‑limiting YIG filter can be switched off in the microwave range at carrier frequencies greater than 3.6 GHz to ensure that even the smallest modulation errors can be measured with high accuracy. The I/Q data can be transferred to a process controller via either the IEC/IEEE bus interface or the factory‑installed LAN interface and then imported into programs such as MATLAB® for further analysis.

Ready for analysis of multistandard, multicarrier transmitters

Future transmission methods in mobile radio and related fields call for wider transmission bandwidths to handle increasing data throughput. Even today multiple carriers of a GSM or 3GPP base station are often transmitted in common power output stages. This reduces the technical effort and costs on the one hand, but increases the band-width to be transmitted on the other.

Having trouble viewing this file? Click this link to download