The State of Signal Generators in 2024: Brands That Define Performance

Signal generators remain indispensable tools for electronics engineers, RF designers, and test engineers who need precise, repeatable waveforms for device characterization, compliance testing, and system validation. As wireless standards push toward higher frequencies and more complex modulation schemes, the demands on signal generation equipment have intensified. In 2024, several manufacturers have distinguished themselves through innovations in frequency range, phase noise performance, ease of integration, and cost efficiency. This review examines the leading brands, the critical specifications that matter most in modern test environments, and how each vendor aligns with different application segments.

Core Criteria for Evaluating Signal Generator Brands

Before diving into brand-by-brand analysis, it is useful to establish the technical benchmarks that separate top-tier instruments from average offerings. Engineers should evaluate signal generators against the following parameters to ensure a purchase meets both current and future needs.

Frequency Range and Bandwidth

The usable frequency span is the most fundamental specification. For general-purpose work, instruments covering DC to 3 GHz or 6 GHz are common. For 5G, radar, or satellite applications, models extending to 20 GHz, 40 GHz, or higher are required. Arbitrary waveform generators (AWGs) also specify analog bandwidth, which determines the maximum reproducible waveform frequency before aliasing occurs.

Signal Purity and Phase Noise

Low phase noise is critical for testing oscillators, mixers, and communication receivers because it directly affects bit error rates and adjacent channel power. Leading brands specify phase noise at defined offsets (e.g., -140 dBc/Hz at 10 kHz offset for a 1 GHz carrier). Harmonic distortion and spurious content round out the purity assessment.

Modulation Capabilities

Modern signal generators support analog modulations (AM, FM, PM, pulse) and digital modulations (ASK, FSK, PSK, QAM). Some models incorporate built-in IQ baseband generators that can emulate standards such as LTE, Wi-Fi, and Bluetooth without external software. The depth of modulation options often dictates whether an instrument can serve across multiple validation stages.

User Interface and Software Ecosystem

Flexible control includes front-panel touchscreens, programmable softkeys, and remote programming via SCPI commands. Many brands offer companion software (e.g., Keysight’s PathWave, Tektronix’s ArbExpress) for waveform editing, sequence creation, and automation. Integration with development environments such as LabVIEW or MATLAB can accelerate test setup for production lines.

Connectivity and Remote Operation

Standard interfaces include USB, LAN (LXI compliant), GPIB (legacy), and wireless LAN on selected models. When building automated test systems, Ethernet‑based control with web‑server status pages simplifies integration. Some newer generators also feature HDMI video output for detailed spectrogram views.

Build Quality and Reliability

In production environments, instruments must operate continuously under demanding conditions. Mean time between failures (MTBF) ratings, operating temperature ranges, and fan noise levels are practical considerations. Brands with strong service networks and calibration support reduce downtime.

Leading Signal Generator Brands in 2024

Keysight Technologies

Keysight, the former Hewlett‑Packard/Agilent test and measurement division, continues to set the performance standard for RF and microwave signal generators. Their MXG‑N5166B and PSG‑E8267D series offer frequency coverage up to 44 GHz with outstanding phase noise (typically -146 dBc/Hz at 1 GHz, 20 kHz offset). The latest UXG‑X‑Series agile signal generators provide nanosecond switching speeds, ideal for stealth‑radar and electronic‑warfare testing. Keysight also dominates the mid‑range with the EXG‑N5173B, a workhorse for cellular and IoT production lines.

Key strengths include the PathWave software suite, which allows waveform creation from industry‑standard design tools, and a rich library of pre‑loaded modulation formats. Users value the consistent calibration history and worldwide support network. However, the premium pricing places Keysight squarely in the high‑end segment, justified by lifetime total cost of ownership for mission‑critical applications. View Keysight signal generator offerings.

Rohde & Schwarz

Rohde & Schwarz competes directly with Keysight in performance and reliability. Their R&S SMA100B analog signal generator is renowned for ultra‑low phase noise (down to -168 dBc/Hz at 20 kHz offset) and exceptionally low harmonics, making it a benchmark for pure CW generation. The R&S SMBV100B is a versatile vector generator covering up to 7.125 GHz with built‑in GNSS, broadcast, and cellular standards – a favorite for conformance testing.

Rohde & Schwarz instruments frequently appear in regulatory test laboratories and high‑precision metrology settings because of their stable internal reference sources and excellent level accuracy over temperature. The company’s software tools, such as the R&S VSE signal analyzer companion, streamline multistandard scenarios. While the user interface has improved with touchscreen models, some engineers still find the menu hierarchy less intuitive than Keysight’s. Explore Rohde & Schwarz signal generators.

Tektronix

Tektronix is best known for oscilloscopes, but their signal generator lineup – especially the AWG5200 series arbitrary waveform generators – has carved a strong niche in time‑domain applications. The AWG5200 offers up to 10 GS/s sample rates with 16‑bit vertical resolution, enabling complex modulated pulses and radar chirps. For general‑purpose RF, the TSG4100A series provides affordable vector modulation up to 6 GHz with good phase noise and built‑in pulse generation.

Tektronix differentiates itself through tight integration with their oscilloscopes and the TekDrive cloud platform, which allows teams to share waveform files seamlessly. Their software, ArbExpress, offers a drag‑and‑drop waveform editor that reduces setup time for repetitive patterns. The pricing is competitive for educational institutions and R&D departments that already rely on Tektronix scopes, though the RF signal generators lag slightly behind Keysight and Rohde & Schwarz in pure phase noise at higher offsets. See Tektronix signal generation solutions.

National Instruments

National Instruments (NI) approaches signal generation from a software‑centric perspective. Their PXIe‑5840 vector signal transceiver combines a 6 GHz vector signal generator, vector signal analyzer, and FPGA‑based real‑time processing into a single PXI module. For production test systems, the NI platform excels when coordinated with multiple instruments through LabVIEW and TestStand.

NI’s strength lies in flexibility and scalability. Engineers can reconfigure the generator’s processing chain via LabVIEW FPGA to implement custom modulation schemes, fading profiles, or embedded triggering logic. The modular form factor also reduces cabling in automated racks. The downside is the need for a PXI chassis and the learning curve of NI’s software environment, which may be overkill for simple standalone bench use. For system‑level validation, however, NI offers a unique advantage in test speed and repeatability. Learn about NI PXI signal generators.

Siglent Technologies

Siglent has become the leading challenger in the budget segment, delivering specifications once only found in instruments costing three times as much. The Siglent SSG3000X series covers 9 kHz to 7.5 GHz with internal IQ modulation, pulse generation, and a touch‑screen UI. The lower‑cost SDG2000X arbitrary waveform generators offer up to 120 MHz bandwidth and 1.2 GS/s sample rate, suitable for general embedded design.

Siglent’s value proposition is strong for startups, educational labs, and contract manufacturers who need reliable signals without paying for the brand premium. The instruments lack some of the polish of Keysight or Rohde & Schwarz in terms of phase noise at low offsets and long‑term aging specifications, but for the majority of device characterisation tasks, the gap is negligible. Siglent also provides free software – EasyWave for waveform editing and the web‑based remote control tool – which reduces total ownership cost. Browse Siglent signal generators.

Other Notable Brands Worth Considering

Beyond the top five, several vendors deserve mention. RIGOL Technologies offers the DG5000 AWG series with up to 500 MHz bandwidth, popular in university labs. Anritsu remains a leader in handheld‑form‑factor signal generators for field testing (e.g., MG3710A), especially for 5G NR and LTE. B&K Precision and GW Instek supply basic function generators for low‑frequency applications. While these brands do not compete in the top‑tier RF performance envelope, they provide cost‑effective solutions for many non‑critical tasks.

Application‑Driven Recommendations

Selecting a brand often becomes clearer when matched to the primary use case. Below are guidelines based on common scenarios in 2024.

Research Laboratories and Advanced R&D

For labs working on quantum computing, ultra‑low‑noise oscillators, or mmWave communications, the Keysight PSG or Rohde & Schwarz SMA100B are the default choices. Their ultra‑low phase noise, high output power (up to +30 dBm), and precise leveling make them indispensable for characterising highly linear components. The investment is recovered through measurement confidence and calibration stability over years of service.

Production Test and Automated Systems

In high‑volume manufacturing, test speed and repeatability are paramount. National Instruments PXI family offers the fastest settling times and parallel execution capabilities when driving multiple test heads. Keysight’s EXG series also shines here with built‑in factory‑calibrated level accuracy and low wear‑and‑tear on mechanical attenuators. Both brands provide extensive driver support for common test executives (NI TestStand, Keysight’s OpenTAP).

Educational Institutions and Design Validation

Universities and small‑to‑medium‑sized R&D teams benefit from the balance of performance and affordability found in Siglent or Tektronix entry‑level AWGs. The Siglent SSG3000X offers touchscreen operation and internal arbitrary waveform memory sufficient for teaching CDMA or OFDM concepts. Tektronix’s ArbExpress software helps students visualise waveform construction without needing a full oscilloscope bench.

Several technology shifts are influencing which brands gain or lose market share in 2024.

  • Software‑defined architectures: An increasing number of generators derive their modulation complexity from FPGA‑based signal processing rather than dedicated hardware. This trend lowers the cost of adding new standards (e.g., 5G NR, Wi‑Fi 7) via firmware updates and allows manufacturers like National Instruments to offer flexible, field‑upgradable platforms.
  • Higher bandwidth for wideband applications: The demand for 1 GHz or wider instantaneous bandwidth (driven by ultra‑wideband radar, 6G research, and automotive radar testing) is pushing vendors to release generators with analog bandwidth exceeding 2 GHz. Keysight’s M8195A AWG is one example; competition in this space will intensify.
  • Miniaturisation and portable form factors: Rohde & Schwarz and Anritsu offer battery‑operated signal generators for field testing, while new players like Red Pitaya integrate signal generation on FPGA‑based USB sticks. Though these cannot match benchtop performance, they fill a niche for on‑location troubleshooting.
  • Simplified workflow automation: The shift to cloud‑connected test environments (e.g., Keysight’s PathWave Cloud, Tektronix TekDrive) allows waveform libraries and calibration records to be shared across teams. Manufacturers that provide robust REST APIs and Python scripting support are increasingly favored by agile development groups.

Conclusion

The signal generator market in 2024 offers clear differentiation across performance tiers. Keysight and Rohde & Schwarz dominate the high‑end RF and microwave space with unmatched phase noise and frequency agility, making them the preferred choice for defense and telecommunications R&D. Tektronix provides strong options for time‑domain waveform creation, especially when paired with their oscilloscopes. National Instruments leads in software‑defined, modular systems for automated production test. Siglent and RIGOL capably address the budget and education segments with surprisingly capable instruments at lower cost.

Engineers should match the brand to the critical specifications required for their specific test tasks rather than defaulting to a legacy preference. The growing trend toward software‑upgradeable hardware means that even mid‑range generators can stay relevant longer, provided the vendor commits to firmware support. By carefully weighing the criteria outlined in this review, buyers can confidently select a signal generator that will serve their development and production needs through the middle of the decade.