Rohde & Schwarz
Rohde & Schwarz FSEK21
20 Hz – 21 GHz Frequency Range
10 Hz – 10 MHz Resolution Bandwidth
-130 dBc/Hz at 10 kHz offset (typical) Phase Noise
-155 dBm (typical, with preamplifier) Displayed Average Noise Level (DANL)
50 Ohm Input Impedance

| Attribute | Value |
|---|---|
| Frequency Range | 20 Hz – 21 GHz |
| Resolution Bandwidth | 10 Hz – 10 MHz |
| Phase Noise | -130 dBc/Hz at 10 kHz offset (typical) |
| Displayed Average Noise Level (DANL) | -155 dBm (typical, with preamplifier) |
| Input Impedance | 50 Ohm |
| Maximum Input Level | +30 dBm (1 W) |
| Dynamic Range | >100 dB |
| Sweep Time | 2.5 ms – 16000 s |
| Video Bandwidth | 1 Hz – 10 MHz |
| RF Input Connector | N-type female (50 Ohm) |
Rohde & Schwarz FSEK21 Options:
- FSEK21 - FSE-B2 - 7 GHz Frequency Extension for FSEA
- FSEK21 - FSE-B3 - TV Demodulator
- FSEK21 - FSE-B4 - Low Phase Noise and OCXO (for models 20)
- FSEK21 - FSE-B5 - FFT Filter 1 Hz to 1 kHz (for models 20)
- FSEK21 - FSE-B7 - Vector Signal Analyzer
- FSEK21 - FSE-B10 - Tracking Generator 7 GHz
- FSEK21 - FSE-B11 - Tracking Generator 7 GHz with I/Q Modulator
- FSEK21 - FSE-B12 - Switchable Attenuator for Tracking Generator
- FSEK21 - FSE-B15 - Controller for FSE (mouse and keyboard included) German
- FSEK21 - FSE-B15 - Controller for FSE (mouse and keyboard included) English
- FSEK21 - FSE-B16 - Ethernet Interface 15-contact AUI connector
- FSEK21 - FSE-B16 - Ethernet Interface Thin-wire BNC connector
- FSEK21 - FSE-B17 - 2nd IEC/IEEE-Bus Interface for FSE
- FSEK21 - FSE-B18 - Removable Hard Disk
- FSEK21 - FSE-B19 - Second Hard Disk for FSE-B18 (firmware included)
- FSEK21 - FSE-B21 - External Mixer
- FSEK21 - FSE-B22 - Increased Level Accuracy up to 2 GHz
- FSEK21 - FSE-B23 - Broadband Output 741.4 MHz
- FSEK21 - FSE-K3 - Noise Measurement Software, Windows
- FSEK21 - FSE-K4 - Phase Noise Measurement Software, Windows
- FSEK21 - FSE-K10 - GSM Application Firmware, Mobile
- FSEK21 - FSE-K11 - GSM Application Firmware, BTS
| Model | FSEK21 |
|---|
The Rohde & Schwarz FSEK21 Spectrum Analyzer spans 20 Hz to 40 GHz, ideal for RF, radar, and satellite tests. It features a high dynamic range, low phase noise, and 0.5 dB amplitude accuracy with a modular upgrade path.
Designed for electronic warfare and telecoms, it supports up to 70 MHz demodulation, 1 Hz RBW/VBW, and offers fast sweep times and remote automation with GPIB and LAN control.
Testwall can supply the used Rohde & Schwarz FSEK21, fully tested. With expert support and global delivery, Testwall ensures high-performance instrumentation with unmatched reliability and service quality. Please contact us directly if you need calibration or repair of the Rohde & Schwarz FSEK21





