# Rohde & Schwarz FSP38 40 GHz Spectrum Analyzer (Pre-Owned)

# Rohde & Schwarz FSP38 40 GHz Spectrum Analyzer (Pre-Owned)

## Key Features At A Glance

-   Frequency range from 9 kHz to 40 GHz with 0.01 Hz frequency resolution
-   IEC/IEEE-488.2 (GPIB), RS-232-C, and parallel printer interfaces with SCPI 1997.0 command set
-   Resolution bandwidths 10 Hz to 10 MHz in 1-/3- steps, plus FFT filters 1 Hz to 30 kHz
-   Dedicated EMI bandwidths (200 Hz, 9 kHz, 120 kHz) and Quasi-Peak detector for EMI work
-   Trace detectors: Max/Min/Auto Peak, Sample, Quasi-Peak, Average, and RMS
-   Input attenuator 0 to 70 dB in 10-dB steps; N female and K female 50 Ohm RF input
-   8.4-inch (21 cm) TFT color display at 640 x 480 VGA resolution
-   Built-in 3.5-inch diskette drive and hard disk; stores >500 instrument settings and traces

The Rohde & Schwarz FSP38 is a benchtop spectrum analyzer covering a continuous frequency range of 9 kHz to 40 GHz. It presents signal amplitude against frequency on an 8.4-inch TFT color display and combines a wide measurement span with fine frequency resolution down to 0.01 Hz, internal frequency-counter readout, and a comprehensive set of resolution and video bandwidth filters.

A spectrum analyzer measures how a signal's power is distributed across frequency, letting an engineer see carriers, harmonics, spurious products, and noise that a time-domain instrument cannot resolve. The FSP38 supports this work with selectable resolution bandwidths from 10 Hz to 10 MHz in 1-/3- steps, dedicated EMI bandwidths of 200 Hz, 9 kHz, and 120 kHz, FFT filters from 1 Hz to 30 kHz, and a full complement of trace detectors including Max Peak, Min Peak, Auto Peak, Sample, Quasi-Peak, Average, and RMS.

ValueTronics stocks and ships this equipment from its own 20,000-square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every pre-owned instrument is inspected and functionally verified in-house before it ships, while new units leave factory-sealed exactly as received from the manufacturer.

## Brand Heritage

Rohde & Schwarz was founded in 1933 in Munich, Germany, by Lothar Rohde and Hermann Schwarz. It has remained an independent, privately held company operating under the same name throughout its history, with no major acquisitions or rebrands altering the brand identity.

## Product Core & Specifications

Specification

Value

Frequency

Frequency range

9 kHz to 40 GHz

Frequency resolution

0.01 Hz

Reference frequency, internal nominal — Aging per year (after 30 days of operation)

1 × 10^-7

Reference frequency, internal nominal — Temperature drift (0 to 50°C)

1 × 10^-8

External reference frequency

10 MHz

Frequency display

with marker or frequency counter

Marker resolution

span / 500

Max deviation (sweep time > 3⋅x auto sweep time)

± ( frequency x reference accuracy + 0.5% x span + 10% x RBW + 1/2 LSD )

Frequency counter resolution

0.1 Hz to 10 kHz (selectable)

Count accuracy (S/N >25 dB)

± (frequency x reference error + 1/2 (last digit))

Frequency span

0 Hz, 10 Hz to 40 GHz

Max span deviation

0.1%

Spectral purity — SSB phase noise, f ≤ 500 MHz (dBc/(1Hz))

Carrier offset 100 Hz

<-84, typ -90

Carrier offset 1 kHz

<-100, typ. -108

Carrier offset 10 kHz

<-106, typ. -113

Carrier offset 100 kHz (span >100 kHz)

<-110, typ. -113

Carrier offset 1 MHz (span >100 kHz)

<-120, typ. -125

Carrier offset 10 MHz

typ. -145

Residual FM (f ≤ 500 MHz, RBW 1kHz, SWT 100ms)

typ. 3 Hz

Sweep time

Span ≥ 10 Hz

2.5 ms to 16000 s

Span ≥ 10 Hz — Max deviation

1 %

Span 0 Hz

1 us to 16000 s

Span 0 Hz — resolution

125 ns

Resolution bandwidths

Bandwidths

10 Hz to 10 MHz (-3 dB) in 1-, 3- steps

EMI-Bandwidths

200 Hz, 9 kHz, 120 kHz (-6 dB)

Bandwidth accuracy ≤ 100 kHz

< 3 %

Bandwidth accuracy 300 kHz to 3 MHz

< 10 %

Bandwidth accuracy 10 MHz

+10 %, –30 %

Shape factor –60dB / -3 dB, ≤ 100 kHz

≤ 5 :1 (gaussian filters)

Shape factor –60dB / -3 dB, 300 kHz to 3 MHz

< 15 :1 (4-pole synchronous tuned filters)

Shape factor –60dB / -3 dB, 10 MHz

< 7 : 1

Shape factor –60dB / -6 dB, EMI bandwidths

≤ 5 : 1

Video bandwidths

1 Hz to 10 MHz in 1-, 3-steps

FFT filter

Bandwidths

1 Hz to 30 kHz (- 3 dB) in 1-, 3-steps

Bandwidth accuracy

5 %, nominal

Shape factor –60dB / -3 dB

2.5 : 1 nominal

Level

Display range

displayed average noise level to 30 dBm

Maximum input level — DC voltage

0 V

RF attenuation 0 dB — CW RF power

20 dBm

RF attenuation 0 dB — Pulse spectral density

97 dBµV (1MHz)

RF attenuation ≥10 dB — CW RF power

30 dBm

RF attenuation ≥10 dB — Max. pulse voltage

50 V

RF attenuation ≥10 dB — Max. pulse energy (10 µs)

0.5 mWs

1-dB compression of input mixer (0-dB RF Attenuation, f>200 MHz)

0 dBm nominal

Intermodulation

3rd-order intermodulation — Intermodulation free dynamic range, level

2 x -30 dBm, ∆f > 5 ⋅ RBW or 10 kHz, whichever is larger

3rd-order intermodulation, 20 to 200 MHz

\>70 dBc, T.O.I. >5 dBm

3rd-order intermodulation, 200 MHz to 3 GHz

\>74 dBc, T.O.I. >7 dBm

3rd-order intermodulation, 3 GHz to 40 GHz

\>70 dBc, T.O.I. >5 dBm

Second harmonic Intercept point (S.H.I), < 100 MHz

25 dBm

Second harmonic Intercept point (S.H.I), 100 MHz to 3 GHz

35 dBm

Second harmonic Intercept point (S.H.I), 3 GHz to 40 GHz

45 dBm

Displayed average noise level (0-dB RF attenuation, RBW 100 Hz, VBW 1 Hz, 20 averages, trace average, span 0 Hz, termination 50 Ohm)

9 kHz

Typ -90 dBm

100 kHz

<-90 dBm

1 MHz

<-100, typ. -125 dBm

10 MHz to 7 GHz

<-120, typ. -143 dBm

7 GHz to 13 GHz

<-115, typ. -138 dBm

13 to 26.5 GHz

<-100, typ. –110 dBm

26.5 to 40 GHz

<-95, typ. –100 dBm

Immunity to interference

Image frequency

\> 70 dB

Intermediate frequency (f < 3 GHz)

\> 70 dB

Spurious response (f >200 kHz, without input signal, 0-dB attenuation)

< -100 dBm

Spurious response (with input signal, f < 7 GHz, mixer level <–10 dBm, ∆f > 100 kHz)

< -70 dBc

Level display

Screen

501 × 400 pixel (one diagram), max. 2 diagrams with independent settings

Log level axis

10 dB to 200 dB, in steps of 10 dB

Linear level axis

10% of reference level per level division, 10 divisions or logarithmic scaling

Trace

max. 3, with two diagrams on screen max 3 per diagram

Trace Detector

Max. Peak, Min. Peak, Auto Peak, Sample, Quasi-Peak, Average, RMS

Trace Functions

Clear/Write, Max. Hold, Min. Hold, Average

Setting range of reference level — Logarithmic level display

–130 to 30 dBm, in steps of 0.1 dB

Setting range of reference level — Linear level display

70.71 nV to 7.07 V in steps of 1%

Units of level axis

dBm, dBmV, dBµV, dBµA, dBpW (log level display); mV, µV, mA, µA, pW, nW (linear level display)

Max uncertainty of Level measurement

Absolute level at 128 MHz, -30dBm (RF attenuation 10 dB, RBW 10 kHz, Ref. level –20 dBm, room temperature)

< 0.2 dB

Frequency response, 9 kHz to 3 GHz

< 0.5 dB

Frequency response, 3 to 26.5 GHz

< 2 dB

Attenuator

< 0.2 dB

Reference level setting

< 0.2 dB

Display nonlinearity Log/Lin (S/N >16 dB), RBW ≤ 100 kHz, 0 to –70 dB

< 0.2 dB

Display nonlinearity Log/Lin (S/N >16 dB), RBW ≤ 100 kHz, –70 to –90 dB

< 0.5 dB

Display nonlinearity Log/Lin (S/N >16 dB), RBW ≥ 300 kHz, 0 to –50 dB

< 0.2 dB

Display nonlinearity Log/Lin (S/N >16 dB), RBW ≥ 300 kHz, –50 to –70 dB

< 0.5 dB

Bandwidth switching (ref.: RBW = 10 kHz), 10 Hz to 100 kHz

< 0.1 dB

Bandwidth switching (ref.: RBW = 10 kHz), 300 kHz to 10 MHz

< 0.2 dB

Trigger functions

Trigger, Span ≥ 10 Hz — Trigger source

free run, video, external, IF-level

Trigger, Span ≥ 10 Hz — Trigger offset

125 ns to 100 s, resolution 125 ns min. (or 1% of offset)

Span = 0 Hz — Trigger source

free run, video, external, IF-level

Span = 0 Hz — Trigger offset

± 125 ns to 100 s, resolution 125 ns min., dependent on sweep time

Span = 0 Hz — Delay time accuracy

± (125 ns + (0.1% x delay time))

Gated sweep — Trigger source

external, IF-level, Video

> **Important:** Maximum input levels: 20 dBm CW RF power at 0 dB RF attenuation, 30 dBm CW RF power at RF attenuation >=10 dB, 50 V maximum pulse voltage, and 0 V DC voltage.

## 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 with every pre-owned unit.
-   Functional verification included before shipment.
-   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
- **Vendor:** Rohde & Schwarz
- **Type:** Spec An
- **Tags:** Analyzers, FSP38, Inc., Manufacturers, Model 38, Pre-Owned, product_manual_group_1, Product_used, R&S, Rohde & Schwarz, Spectrum, Spectrum Analyzer, Updated Item Review

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| None | 0.00 USD | In stock |
| NIST Traceable | 0.00 USD | In stock |
| NIST Traceable with Full Data | 0.00 USD | In stock |
| ISO IEC 17025 Accredited | 0.00 USD | In stock |

## Images

- Rohde & Schwarz FSP38 40 GHz Spectrum Analyzer (Pre-Owned)

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> Source: [ValueTronics](https://valuetronics.com/products/fsp38-rohde-schwarz-spectrum-analyzer-used)
> Updated: 2026-06-02