The HP/Agilent 85025A is a precision RF detector engineered for accurate signal detection across 10 MHz to 18 GHz. It operates in both AC (modulated) and DC (unmodulated) modes, delivering dynamic range performance of +16 dBm to −55 dBm in AC mode and +16 dBm to −50 dBm in DC mode. The detector terminates at 50 Ω nominal impedance with N-type connectors and a 1.22 m attached cable. It integrates directly with HP 8757 series scalar network analyzers for network analysis and component characterization in RF and microwave measurement applications.
Technical Specifications
• Frequency Range: 10 MHz to 18 GHz
• Detection Modes: AC (modulated) and DC (unmodulated) signals
• Dynamic Range — AC Mode: +16 dBm to −55 dBm
• Dynamic Range — DC Mode: +16 dBm to −50 dBm
• Nominal Impedance: 50 Ω
• Maximum Input Power: +20 dBm (100 mW), ±10 VDC
• Return Loss: 10 dB (10–40 MHz), 20 dB (40 MHz–4 GHz), 17 dB (4–18 GHz)
• Frequency Response (DC Mode, −10 dBm): +0.25 dB/−0.75 dB (10–40 MHz); ±0.5 dB (40 MHz–18 GHz)
• Connector: N-Type (7 mm)
• Cable Length: 1.22 m (48 inches)
• Male Center Conductor Recession: 0.207–0.210 inches (standard); 0.000–0.003 inches (Option 001)
• Weight: 3 lb (shipping)
– Key Features
• Dual-mode detection for both modulated and unmodulated microwave signals
• Wide dynamic range supporting weak and strong signal measurement
• Consistent return loss performance across three frequency bands
• Flat frequency response in DC mode (±0.5 dB above 40 MHz)
• Integrated cable assembly (1.22 m) with N-type connection
• Option 001 available with flush center conductor alignment for precision applications
– Typical Applications
• Scalar network analysis and S-parameter measurement
• RF component characterization (filters, amplifiers, attenuators)
• Microwave signal detection in laboratory and manufacturing environments
• Power measurement across the 10 MHz to 18 GHz band
– Compatibility & Integration
Designed for HP 8757 series scalar network analyzers. Requires HP 8757A firmware revision 2.0 or higher. Not compatible with HP 8756 or HP 8755 analyzers. HP 11614A firmware enhancement may be required for upgrading previous revisions.
