Rohde & Schwarz SMB Series RF and Microwave Signal Generators
2 models with full specifications from Rohde & Schwarz.
The Rohde & Schwarz SMB Series consists of analog RF and microwave signal generators designed for testing receiver characteristics, RF components, and general-purpose laboratory applications. This series includes the SMB100A and SMB100B, which provide spectral purity, stable frequency outputs, and flexible modulation options. Engineers and technical buyers can select between these instruments based on specific frequency coverage demands, switching speed requirements, and interface configurations.
- SMB100A Minimum Frequency
- 9 kHz
- SMB100B Minimum Frequency
- 8 kHz
- SMB100A Frequency Resolution
- 0.001 Hz
- SMB100B Frequency Resolution
- 0.01 Hz
- SMB100B Max Output Power
- +18 dBm
Models in this series
Frequency Range and Spectral Purity
The models within the SMB series offer different frequency coverage options. The SMB100A supports frequency ranges from 9 kHz up to 40 GHz depending on the selected configuration, featuring options for 1.1 GHz, 2.2 GHz, 3.2 GHz, and 6 GHz (options B101, B102, B103, and B106). It delivers a fine frequency resolution of 0.001 Hz. Regarding spectral purity, the SMB100A features a typical phase noise of -128 dBc/Hz at a 1 GHz carrier with a 20 kHz offset, along with harmonics of less than -30 dBc under CW conditions with level <= 10 dBm and frequency > 1 MHz.
The SMB100B covers a minimum frequency of 8 kHz up to a maximum of 6 GHz, depending on options such as the 1 GHz (SMBB-B101), 3 GHz (SMBB-B103), or 6 GHz (SMBB-B106) configurations. It features a frequency resolution of 0.01 Hz.
Signal Leveling and Output Power
The SMB100B provides a standard maximum output power of +18 dBm up to 6 GHz. Its power range spans from -120 dBm to +18 dBm, which can be expanded down to -145 dBm using electronic attenuator options. For the SMB100A, the level setting time is under 2.5 ms (typically 1.5 ms) with a resolution of 0.01 dB. The instrument includes a reverse power protection of 50 V DC and maintains an output VSWR below 1.8 for frequencies up to 6 GHz.
Modulation, Sweeping, and Interfaces
The SMB100B features comprehensive analog modulation capabilities, including AM, FM, Phase, and optional Pulse modulation. It supports RF, LF, and Level sweep modes. Standard interfaces include LAN (10/100/1000Base-T) and USB 2.0, with an optional GPIB interface. The physical dimensions of the SMB100B are 344 mm x 112 mm x 368 mm.
The SMB100A provides a dedicated internal LF generator covering 0.1 Hz to 1 MHz. For remote control, it is equipped with standard LAN (LXI Class C), USB, and GPIB interfaces. Frequency switching speed via remote control is under 3 ms (typically 1.5 ms), whereas the SMB100B offers a frequency switching speed under 1.2 ms.
Frequently asked questions
- What is the recommended calibration interval for the SMB100A?
- The recommended calibration interval for the Rohde & Schwarz SMB100A is 3 years.
- What are the reference oscillator options for these generators?
- Both models utilize a 10 MHz reference. The SMB100A features an internal reference with an optional OCXO. The SMB100B includes a standard TCXO with an optional OCXO.
- Does the SMB100B support touchscreen control?
- Yes, the SMB100B includes a 5-inch touchscreen display with an 800 x 480 pixel resolution.