Rohde & Schwarz SMBV Vector Signal Generators
2 models with full specifications from Rohde & Schwarz.
The Rohde & Schwarz SMBV vector signal generator series provides RF performance and baseband generation for design, testing, and production. This page covers the SMBV100A and SMBV100B models, outlining their features, frequency options, and modulation capabilities. RF engineers and system calibrators can use this guide to compare the performance profiles, internal bandwidth limits, and interface options of each generator to select the appropriate instrument for their bench or automated test setup. While both instruments provide up to 6 GHz RF outputs, they differ in baseband bandwidth, phase noise performance, and interface configurations. This overview highlights these distinctions using verified manufacturer specifications.
- Maximum Frequency
- 6 GHz
- Minimum Frequency
- 8 kHz (SMBV100B) / 9 kHz (SMBV100A)
- Maximum Output Power
- +18 dBm
- Internal Baseband Bandwidth
- Up to 500 MHz (SMBV100B) / 120 MHz (SMBV100A)
Models in this series
Frequency Range and Phase Noise Performance
The SMBV family supports testing up to 6 GHz with option-dependent configurations. The SMBV100A has a minimum frequency of 9 kHz and a frequency resolution of 0.001 Hz, while the SMBV100B extends down to 8 kHz with a resolution of 0.01 Hz.
For spectral purity, the SMBV100B provides lower phase noise at < -126 dBc/Hz (typical -134 dBc/Hz) at a 1 GHz carrier and 20 kHz offset, compared to the SMBV100A which achieves < -122 dBc/Hz (typical -128 dBc/Hz) under the same conditions. Both models feature a standard 10 MHz reference oscillator with an optional OCXO configuration.
Baseband Generation and Modulation Capabilities
The models differ significantly in their internal baseband signal generation limits. The SMBV100A provides up to 120 MHz of internal baseband RF modulation bandwidth, supporting multisegment waveform modes, CW interference, and AWGN simulation. It supports cellular standards such as 2G, 3G, LTE, and HSPA+ through software or hardware options.
The SMBV100B features an internal baseband generator that supports up to 500 MHz modulation bandwidth. It is designed for Vector I/Q modulation (including ASK, FSK, PSK, and QAM) and includes an internal audio generator operating from 0.1 Hz to 1 MHz for sine, square, pulse, triangle, and trapezoid waveforms.
Physical Interface and System Integration
For automated test environments, the SMBV100A includes standard LAN, USB, and GPIB interfaces, as well as an N-female RF output connector. The SMBV100B provides Gigabit Ethernet (LAN), USB 2.0, and optional GPIB interfaces.
On the bench, the SMBV100B features a 5-inch color touchscreen display with 800 x 480 pixel resolution. It runs on a Linux operating system, has a recommended calibration interval of 3 years, and requires a 30-minute warm-up time.
Frequently asked questions
- What is the difference in minimum frequency between the SMBV100A and SMBV100B?
- The SMBV100A has a minimum frequency of 9 kHz, while the SMBV100B extends down to 8 kHz.
- What are the standard output power limits for the SMBV series?
- Both the SMBV100A and SMBV100B offer a standard output power range from -120 dBm to +18 dBm.
- Do these instruments support optional high-stability reference oscillators?
- Yes, both models come with a standard 10 MHz reference oscillator and support an optional oven-controlled crystal oscillator (OCXO).