HP / Agilent 70905B RF Section, 50 kHz to 22 GHz

The HP/Agilent 70905B RF Section is a front-end RF input module for the HP/Agilent 70000 modular measurement system, operating from 50 kHz to 22 GHz. It converts input signals to intermediate frequency (IF) for further processing via a broadband, low-noise mixer architecture. The module is optimized for high dynamic range measurements and designed for use with a preselector module such as the Agilent 70600A. Without an input attenuator, standalone operation is not recommended; however, in manufacturing environments with known signal characteristics, unpreselected operation can enhance sensitivity and amplitude flatness. The 70905B provides automatic signal identification routines for unknown frequencies and delivers a 21.4 MHz IF output. When tuned above 2.7 GHz, it supplies a 321.4 MHz output and accepts 321.4 MHz input for demodulation or detection of unpreselected signals. A first LO auxiliary output is available for integration with tracking generators and external mixer interface modules.

– Technical Specifications

• Frequency Range: 50 kHz to 22 GHz
• IF Output: 21.4 MHz
• 321.4 MHz Output/Input: Available when tuned above 2.7 GHz; 100 MHz to 700 MHz tracking the 21.4 MHz IF with offset of −21 dBm ± 3 dB
• Output Impedance (321.4 MHz): 50 Ω
• RF Input Impedance: 50 Ω
• First LO Signal Input: 3.0 to 6.6 GHz via SMA, approximately +1.5 to +12 dBm
• First LO Auxiliary Output: SMA connector, approximately +1.5 to +12 dBm
• Module Width: 2-slot width
• Weight: Approximately 2 lbs
• Dimensions: 0.01 × 3 × 5 inches

– Key Features

• Broadband, low-noise mixer for high dynamic range measurements
• Automatic signal identification capability for unpreselected operation
• 321.4 MHz output and input for signals above 2.7 GHz
• First LO auxiliary output for external device integration
• 50 Ω RF and output impedance

– Compatibility & Integration

The 70905B integrates into the HP/Agilent 70000 Modular Measurement System and requires a preselector module (e.g., Agilent 70600A) for standard operation. Compatible with HP/Agilent 70000 series IF sections including 70903A, 70911A, and 70902A. RF input uses Type-N (f) connector; 321.4 MHz output and input, plus first LO auxiliary output all employ SMA connectors.