Rohde & Schwarz RSP DC to 2.7GHz Precision Variable Step Attenuator

The Rohde & Schwarz RSP is a precision variable step attenuator delivering accurate signal level control from DC to 2.7 GHz with 0.1 dB resolution across a 0 to 139.9 dB range. Built for laboratory and field applications demanding reliable RF signal attenuation, the RSP combines 50 Ω impedance compatibility with advanced frequency-dependent correction technology to minimize measurement uncertainty across its full bandwidth.

– Technical Specifications

• Frequency Range: DC to 2.7 GHz
• Attenuation Range: 0 dB to 139.9 dB in 0.1 dB steps
• Impedance: 50 Ω
• RF Connectors: N female
• Maximum Power: 1 W
• Attenuation Uncertainty (uncorrected):
– DC to 1 GHz: < 0.2 dB + 1% of attenuation value
– 1 GHz to 2 GHz: < 0.3 dB + 1% of attenuation value
– 2 GHz to 2.7 GHz: < 0.4 dB + 1% of attenuation value
• Attenuation Uncertainty (corrected, DC to 0.5 GHz): 3 dB)
• Insertion Loss (0 dB position):
– DC to 1 GHz: < 0.12 dB typical
– 1 GHz to 2.7 GHz: < 1.8 dB typical
• VSWR:
– DC to 2 GHz: < 1.2 + 0.15 × frequency (GHz)
– 2 GHz to 2.7 GHz: < 1.5

– Key Features

• Automatic frequency-dependent attenuation correction minimizes measurement error
• 18 internal attenuator pads with variations measured at 50 MHz intervals and stored for correction
• CORR function enables absolute accuracy correction by automatic pad switching
• Error display shows sum of attenuation errors
• RCL99 function provides attenuation values between 3 dB and 139.9 dB accounting for residual attenuation
• Exceeds 5 × 10⁶ switching cycles per section
• Compact 19" rackmount housing with transferable RF connectors

– Compatibility & Integration

• IEC/IEEE 488 (IEC 625-1) bus interface for automated test assemblies
• Listener, talker, and service request functions supported
• Remote programming via IEC/IEEE bus
• Manual control via numeric keypad and step keys