The Rohde & Schwarz SMB100A is a compact analog signal generator delivering precise RF signals across multiple frequency bands from 9 kHz to 40 GHz. This instrument combines high output power, exceptional phase noise performance, and flexible modulation capabilities for research, development, and production test environments. The SMB100A fits a 2U form factor while maintaining full functionality across its frequency range, making it suitable for bench and system integration applications.
Technical Specifications
Frequency Coverage
Multiple frequency options span 9 kHz to 6 GHz and 100 kHz to 40 GHz configurations. Specific options include 9 kHz to 1.1 GHz, 9 kHz to 2.2 GHz, 9 kHz to 3.2 GHz, and 9 kHz to 6 GHz. Extended-range models support 100 kHz to 12.75 GHz, 100 kHz to 20 GHz, 100 kHz to 31.8 GHz, and 100 kHz to 40 GHz.
Output Power
Standard output power exceeds +18 dBm across 1 MHz to 12.75 GHz. Peak output reaches +27 dBm typical. High-power options deliver +19 dBm on 20 GHz models (R&S®SMB-B31) and +16 dBm to 40 GHz on 40 GHz models (R&S®SMB-B32).
Phase Noise
SSB phase noise measures typically -128 dBc at 1 GHz with 20 kHz offset.
Frequency Synthesis
Frequency setting resolution is 0.001 Hz. Synthesis resolution at 1 GHz reaches 0.44 μHz nominal. The instrument employs frequency dividers below 3 GHz and an integrated DDS synthesizer below 23.3475 MHz.
Modulation
Analog modulations include AM and FM/φM. Pulse modulation and user-programmable pulse trains are supported via optional pulse generator and modulator. FM stereo and RDS receiver testing is enabled through the optional R&S®SMB-B5 stereo/RDS coder (up to 6 GHz instruments).
Attenuator Options
Electronic step attenuators provide wear-free level adjustment with 5 dB steps (6 dB with R&S®SMB-B112 option). Mechanical step attenuators are available with specific frequency options. No attenuator is provided on R&S®SMB-B112L, -B120L, and -B140L models.
External Reference Interface
REF IN connector (BNC female) accepts 5 MHz or 10 MHz external reference with ±3 × 10⁻⁶ locking range. Input level range: 0 dBm to +16 dBm. Input impedance: 50 Ω nominal. Output level: +7 dBm to +13 dBm (+10 dBm typical) with 50 Ω source impedance.
Physical
2U compact form factor. Weight: 5.6 kg maximum (6 GHz model), 6.9 kg (40 GHz model).
– Key Features
• Frequency setting resolution to 0.001 Hz
• Low phase noise for demanding applications
• Multiple frequency options for flexible system design
• Optional stereo/RDS coder for broadcast testing
• Wear-free electronic attenuator on selected models
– Compatibility & Integration
The SMB100A integrates with the R&S®SMZ frequency multiplier to extend coverage to 50 GHz through 110 GHz. Frequency option modules (R&S®SMB-B101 through R&S®SMB-B140 series) tailor the instrument to specific band requirements.
