# Rohde & Schwarz FSU46 20 Hz to 46 GHz Spectrum Analyzer (Pre-Owned) # Rohde & Schwarz FSU46 20 Hz to 46 GHz Spectrum Analyzer (Pre-Owned) ## Key Features At A Glance - Spectrum analysis from a 20 Hz lower limit, with upper frequency from 3.6 GHz to 67 GHz across the R&S FSU series - 0.01 Hz frequency resolution with internal OCXO reference (optional low-aging OCXO via R&S FSU-B4) - Resolution bandwidths from 10 Hz, plus FFT filters, EMI (CISPR) filters, and channel filters including RRC shapes - EMI detectors (Quasi Peak, CISPR-RMS, CISPR-AV) alongside Max/Min Peak, sample, RMS, and average detectors - GPIB (IEC/IEEE 488.2), LAN 10/100BaseT, RS-232-C, and USB interfaces for automated test systems - I/Q data capture up to 512 ksample with 24-bit I and Q, transferred over GPIB or LAN - Low SSB phase noise, typ. -133 dBc (1 Hz) at 10 kHz offset (f = 640 MHz) - Optional tracking generator, preamplifiers, external-mixer ports, and vector signal analysis (separately ordered options) The R&S FSU is a family of high-performance spectrum analyzers offered in models that span an upper frequency limit from 3.6 GHz (R&S FSU3) up to 67 GHz (R&S FSU67), all sharing a common 20 Hz lower frequency limit and 0.01 Hz frequency resolution. Each model presents a 50 Ω RF input that can be DC- or AC-coupled and derives its frequency reference from an internal OCXO, with measurement performance specified after a 30-minute warm-up under defined environmental conditions. As a spectrum analyzer, the instrument captures and displays signal power across a swept frequency range, letting an engineer characterize spectral content, harmonics, phase noise, and modulation. The R&S FSU provides EMI filters at standard 6 dB bandwidths together with CISPR detectors (Quasi Peak, CISPR-RMS, CISPR-AV) for interference measurements, and a broad set of optional application firmware packages — for GSM/EDGE, 3GPP WCDMA (BTS and UE), TD-SCDMA, CDMA2000, Bluetooth, noise figure and gain, phase noise, and power sensor measurements — that extend the base analyzer to standard-specific testing. Each firmware package is a separately ordered option. ValueTronics stocks and holds its inventory in a 20,000-square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every used unit we sell is inspected and functionally verified in-house by our technicians before it ships, while new units ship factory-sealed exactly as received from the manufacturer; in either case, our team can help match the right R&S FSU model to your frequency range and measurement requirements. ## Brand Heritage Rohde & Schwarz is an independent group of companies specializing in electronics and a leading supplier of test and measurement solutions. Established more than 75 years ago and headquartered in Munich, Germany, the company has operated under the Rohde & Schwarz name without a major corporate rebrand or acquisition-driven name change. ## Compare Other Models in This Series The R&S FSU series shares one specification platform across seven model designations that differ principally in maximum frequency coverage: R&S FSU3 (to 3.6 GHz), R&S FSU8 (to 8 GHz), R&S FSU26 (to 26.5 GHz), R&S FSU43 (to 43 GHz), R&S FSU46 (to 46 GHz), R&S FSU50 (to 50 GHz), and R&S FSU67 (to 67 GHz). All models begin at a 20 Hz lower frequency limit and share the same 0.01 Hz frequency resolution and core analyzer architecture. Because the models share filter types, detectors, level architecture, and interfaces, the choice between them is driven mainly by the upper frequency a given application requires, together with the RF input connector and any preamplifier or external-mixer options compatible with that model. Each pre-owned model linked below is its own product page with condition-matched pricing. Select the R&S FSU model whose frequency coverage and options fit your application, then choose the pre-owned listing that matches your budget and availability needs. Beyond maximum frequency, the models differ in RF input connector — type N on the R&S FSU3 and R&S FSU8, a 3.5 mm/N test port adapter on the R&S FSU26, 2.92 mm (K)/N on the R&S FSU43 and R&S FSU46, 2.4 mm/N on the R&S FSU50, and 1.85 mm (V) on the R&S FSU67 — and in nominal weight, from 14.6 kg on the R&S FSU3 to 17.4 kg on the R&S FSU67. See the comparison table for the per-model values. Resolution-bandwidth coverage and certain options also vary by model: the R&S FSU43, R&S FSU50, and the .49/.66 model variants top out at a 10 MHz maximum resolution bandwidth (with a 10 MHz maximum bandwidth), while other models extend higher, and the external-mixer ports (R&S FSU-B21) apply only to the R&S FSU26/43/46/50/67. Consult each model's row in the table to confirm exact coverage and option compatibility. Model Frequency Range RF Connector Max Resolution Bandwidth **FSU46** 20 Hz to 46 GHz test port adapter 2.92 mm (K)/N female 50 MHz FSU3 20 Hz to 3.6 GHz N female 50 MHz FSU8 20 Hz to 8 GHz N female 50 MHz FSU26 20 Hz to 26.5 GHz test port adapter APC 3.5 mm/N female 50 MHz Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Accessories Supplied - Power cable - Printed quick start guide - CD-ROM (with operating manual and service manual) - Test port adapter with 2.92 mm (K) female (1036.4790.00) and N female (1036.4777.00) connector ## Product Core & Specifications Specification Value Frequency Frequency range, DC coupled 20 Hz to 46 GHz Intermodulation 1 dB compression of input mixer (0 dB RF attenuation, ≤ 3.6 GHz) +13 dBm, nominal 1 dB compression of input mixer (0 dB RF attenuation, > 3.6 GHz) +7 dBm, nominal TOI, 10 MHz ≤ fin < 300 MHz \> 17 dBm, typ. 20 dBm TOI, 300 MHz ≤ fin < 3.6 GHz \> 22 dBm, typ. 27 dBm TOI, 3.6 GHz ≤ fin < 26.5 GHz \> 12 dBm, typ. 15 dBm TOI, 26.5 GHz ≤ fin ≤ 40 GHz \> 12 dBm, typ. 15 dBm TOI, fin > 40 GHz \> 12 dBm, nominal Displayed average noise level (0 dB RF attenuation, termination 50 Ω, normalized to 1 Hz RBW) 20 Hz < –90 dBm 100 Hz < –110 dBm 1 kHz < –120 dBm 10 kHz < –130 dBm 100 kHz < –130 dBm 1 MHz < –140 dBm 10 MHz < –153 dBm 20 MHz ≤ f < 2 GHz < –152 dBm, typ. –156 dBm 2 GHz ≤ f < 13 GHz < –150 dBm, typ. –153 dBm 13 GHz ≤ f < 18 GHz < –148 dBm, typ. –151 dBm 18 GHz ≤ f < 22 GHz < –147 dBm, typ. –150 dBm 22 GHz ≤ f < 26.5 GHz < –145 dBm, typ. –148 dBm 26.5 GHz ≤ f < 40 GHz < –138 dBm, typ. –141 dBm 40 GHz ≤ f ≤ 46 GHz < –133 dBm, typ. –138 dBm RF input (front panel) Impedance 50 Ω Connector test port adapter 2.92 mm (K)/N female VSWR (RF attenuation ≥ 10 dB, DC coupled, f < 3.6 GHz) < 1.5 VSWR (3.6 GHz ≤ f < 18 GHz) < 1.8 VSWR (18 GHz ≤ f < 26.5 GHz) < 2.0 VSWR (26.5 GHz ≤ f < 40 GHz) < 2.5 VSWR (40 GHz ≤ f < 50 GHz) < 3, nominal General Power consumption typ. 150 VA Weight, without options, nominal 16.8 kg (37.0 lb) > **Important:** Maximum input level: RF input AC coupled 50 V DC; CW RF power 20 dBm (0.1 W) at 0 dB RF attenuation and 30 dBm (1 W) at >= 10 dB RF attenuation; maximum pulse voltage 150 V at >= 10 dB RF attenuation. > **Important:** Specifications apply under the following conditions: 30 minutes warm-up time at ambient temperature, specified environmental conditions met, calibration cycle adhered to, and all internal automatic adjustments performed. > **Important:** Data without tolerances are typical values only. Data designated "nominal" applies to design parameters and is not tested. > **Important:** Mass memory uses a hard disk and a USB flash disk; the USB flash disk is not supplied. > **Important:** Recommended calibration interval: 2 years for operation with external reference, 1 year for operation with internal reference. > Recommended pairing: on the R&S FSU26/43/46/50/67, the R&S FSU-B21 LO/IF ports drive external R&S harmonic mixers (R&S FS-Z60, FS-Z75, FS-Z90, FS-Z110) to extend measurements from 40 GHz up to 110 GHz. ## About this Pre-Owned unit This pre-owned unit is inspected and functionally verified in-house before it ships and is backed by our pre-owned warranty. To confirm its exact condition, firmware revision, installed options, or included accessories for your application before ordering, contact our Test Architects. - Warranty included - Functional verification included - Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data. - Note that unnecessary accessories may not be included (contact Test Architect to confirm). ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application. **Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.** ## Details - **Price:** 0.0 USD - 675.0 USD - **Vendor:** Rohde & Schwarz - **Type:** Spec An - **Tags:** Analyzers, FSU46, Manufacturers, Model 46, Pre-Owned, product_manual_group_1, Product_used, Rohde & Schwarz, Rohde & Schwarz GmbH & Co. KG, Spec An, Spectrum ## Variants | Variant | Price | Available | |---------|-------|-----------| | None | 0.00 USD | In stock | | NIST Traceable | 600.00 USD | In stock | | NIST Traceable with Full Data | 600.00 USD | In stock | | ISO IEC 17025 Accredited | 675.00 USD | In stock | ## Images - Rohde & Schwarz FSU46 20 Hz to 46 GHz Spectrum Analyzer (Pre-Owned) --- > Source: [ValueTronics](https://valuetronics.com/products/fsu46-rohde-schwarz-spectrum-analyzer-used) > Updated: 2026-06-02