Rohde & Schwarz DPSP DC-2.7GHz 139dB Programmable RF Step Attenuator

The Rohde & Schwarz DPSP is a programmable RF step attenuator engineered for precise signal level control across DC to 2.7 GHz. It delivers up to 139 dB of attenuation in 1 dB increments, supporting both manual adjustment via rotary switches and remote control through IEEE 488 / HPIB bus interface. The attenuator handles 1 W continuous power with insertion loss below 1.2 dB at 2.7 GHz and settles in less than 20 ms per step. Rated for over 5 × 10⁶ switching cycles per section, it integrates directly into automated test systems and benchtop measurements requiring dynamic range control.

– Technical Specifications

• Frequency Range: DC to 2.7 GHz
• Attenuation Range: 0 dB to 139 dB (1 dB steps)
• Impedance: 50 Ohms
• Maximum Continuous Power: 1 W
• Insertion Loss: < 1.2 dB at 2.7 GHz
• Settling Time: 5 × 10⁶ per section
• Connectors: N-type (Nf), front or rear panel mountable
• Operating Temperature: 0 °C to +45 °C
• Storage Temperature: –40 °C to +70 °C
• Altitude Rating: 3000 m operational, 4500 m transport

– Key Features

• Dual-mode control: manual rotary switches and IEEE 488 / HPIB remote operation
• Learn mode enables programming of manually selected settings for automated sequences
• Compact 19″ housing for benchtop or rack integration
• Dimensions: 241 × 110 × 234 mm; Weight: 3 kg
• Power supply: 115/125/220/235 V ±10%, 47–440 Hz (10 W draw)

– Typical Applications

Signal attenuation in RF test benches, receiver sensitivity measurements, automated gain control validation, and dynamic range testing across microwave frequencies.

– Compatibility & Integration

IEEE/IEC bus interface (IEC 625-1 / IEEE 488) supports listener, talker, and service request functions for seamless integration into automated test assemblies and measurement systems.