Rohde & Schwarz SMT Series Analog RF Signal Generators
3 models with full specifications from Rohde & Schwarz.
The Rohde & Schwarz SMT Series consists of high-performance analog RF signal generators engineered for comprehensive receiver measurements and electromagnetic susceptibility (EMS) testing. With a common frequency starting point of 5 kHz, the series scales up in maximum frequency capability to address different application ranges: 1.5 GHz for the SMT02, 3 GHz for the SMT03, and 6 GHz for the SMT06. These instruments deliver a broad output power range from -144 dBm to +13 dBm, flexible sweep modes, and versatile modulation options including amplitude, frequency, phase, and pulse modulation. Designed for testing conventional receivers, avionics, and specialized stereo applications, the SMT Series provides technical buyers and test engineers with stable, precise signal generation across laboratory and production environments.
- Frequency Range
- 5 kHz to 6 GHz (model dependent)
- Output Power Range
- -144 dBm to +13 dBm
- Frequency Resolution
- 0.1 Hz
- Standard Reference Stability
- < 1 ppm / year
Models in this series
Frequency Coverage and Model Comparison
The primary differentiator within the SMT Series is the upper frequency limit of each model. The SMT02 covers 5 kHz to 1.5 GHz, which is suitable for standard receiver measurements, EMS testing, and specialized stereo or avionics applications. The SMT03 extends this range up to 3 GHz, providing the bandwidth needed for higher-frequency analog receiver testing. The SMT06 offers the broadest coverage, spanning from 5 kHz up to 6 GHz, making it well-suited for high-frequency microwave applications and broader EMS setups. All three models share a common frequency resolution of 0.1 Hz.
Signal Quality and Level Performance
Across the SMT Series, the standard output power range is wide, spanning from -144 dBm to +13 dBm. The SMT06 also allows for overrange output up to +16 dBm. Signal integrity is maintained through robust hardware design. For example, the SMT03 features a phase noise of less than -122 dBc/Hz at 1 GHz with a 20 kHz offset, while the SMT06 specifies harmonic levels below -30 dBc for levels up to +10 dBm and low subharmonic levels. Additionally, the SMT06 provides integrated reverse RF power protection of up to 50 W (from 1 MHz to 6 GHz) and reverse DC voltage protection up to 50 V, safeguarding the output stage against accidental overload.
Modulation Capabilities and Reference Options
The series supports versatile modulation capabilities, including AM, FM, Phase Modulation (φM), and Pulse Modulation. For instance, the SMT02 features high carrier frequency accuracy in FM DC mode, and the SMT03 offers an internal LF generator covering 0.1 Hz to 500 kHz with 0.1 Hz resolution. Reference frequency options allow engineers to tailor the stability of the generator. The standard configuration uses a 10 MHz TCXO with an aging rate of less than 1 ppm/year. For tighter stability requirements, the Option SM-B1 OCXO reduces reference aging to less than 1 x 10^-9/day (available for the SMT02 and SMT03).
Frequently asked questions
- What sweep modes are supported by the SMT Series?
- The series supports RF, LF, and Level sweep modes. Depending on the model, these can be configured for automatic, single, manual, or step operations.
- What is the output impedance and VSWR of the SMT06?
- The SMT06 has an output impedance of 50 Ω, with a VSWR of less than 1.5 for frequencies up to 1.5 GHz, less than 1.8 up to 3 GHz, and less than 2.0 up to 6 GHz.
- How many setups can be stored in the memory of the SMT06?
- The SMT06 includes a memory that can store up to 50 complete instrument setups.