Agilent / Keysight 85620A Mass Memory Module

The Agilent/Keysight 85620A Mass Memory Module is a self-contained storage and processing accessory that expands the computational and data logging capabilities of compatible portable spectrum analyzers. It operates as an integrated computer without requiring external controllers, enabling unattended measurement execution, complex routine automation, and extended trace archival. The module delivers advanced measurement personalities, programmable limit-line functions, and single-key execution of stored measurement sequences - essential for semi-automated benchtop testing and field deployment scenarios.

Technical Specifications

• Memory: 128 kB battery-backed RAM for user data


• Storage capacity: minimum 10 downloadable programs (DLPs) or over 100 traces with associated instrument states


• Expandable memory via credit-card-size plug-in memory cards; one Keysight 85700A 32K-byte RAM card supplied


• Power consumption: 5.0 W at +5 Vdc (supplied by host analyzer)


• Operating temperature: −10°C to +55°C


• Storage temperature: −62°C to +85°C


• Humidity rating: 95% at 40°C for 5 days


• Operating altitude: 15,000 ft


• Non-operating altitude: 50,000 ft


• Enclosure protection: IP 20 per IEC-529


• Military specification: MIL-T-28800C, Type III, Class 3


• Physical dimensions: 131.25 mm H × 91.25 mm W

Key Features

• Built-in clock/calendar with automatic timestamp logging of saved traces


• Auto-save triggering when user-defined criteria are satisfied


• Auto-execute function for unattended program operation


• Smart limit lines with up to 20 frequency and amplitude breakpoints


• Dual limit-line capability (maximum and minimum values)


• Absolute and relative limit-line definition modes


• Measurement personality expansion for enhanced analyzer functionality

Typical Applications

• Long-duration, unattended RF spectrum monitoring


• Automated test routine development and execution


• Multi-trace data logging with time-stamped archival


• Field-based semi-automated measurement campaigns

Compatibility & Integration Primary compatibility: Agilent/Keysight 8560A, 8560B, 8560E, and 8560EC-series portable spectrum analyzers. Compatible with select other Hewlett-Packard analyzer models. Accepts Keysight 85700A 32K-byte RAM memory cards for storage expansion.