HP / Agilent 8449A Preamplifer

The HP/Agilent 8449A Preamplifier is a high-gain, low-noise instrument that enhances the sensitivity of microwave spectrum analyzers and measurement systems operating across the 2.0 to 22.0 GHz band. By reducing system noise figure and providing stable gain, this preamplifier enables detection of weak signals while maintaining measurement accuracy across extended frequency ranges.

Technical Specifications Frequency Range: 2.0 to 22.0 GHz Small-Signal Gain:

Minimum: 23 dB

At 25°C (minimum): 28 dB

Power Gain: 26 dB Noise Figure: Less than 10 dB Output Power: Rated at 5 mW Gain Flatness:

±3.4 dB across 2 to 22 GHz

Typically 2.4 dB (0–55°C operating range) Physical: 12 × 10 × 8 in; 2.9 kg (6.4 lbs). Half-width System II package. Operating Temperature: 0–55°C

Key Features

Reduces measurement time through wider analysis bandwidth without sacrificing weak-signal detection

Compact half-width System II form factor enables straightforward integration into existing instrument racks and ATE platforms

Stable gain performance across operating temperature range supports reliable production test environments

Designed to international safety standards with ESD-protective handling requirements during installation and service

Typical Applications

Sensitivity enhancement for microwave spectrum analyzers

Low-level signal detection in RF/microwave test environments

Integration into automatic test equipment (ATE) systems requiring improved dynamic range

Production testing and characterization of wireless components

Compatibility & Integration The 8449A interfaces with spectrum analyzers and microwave measurement instruments through standard RF connectors typical of instruments in its class. Its compact System II packaging allows direct mounting in automatic test equipment racks. Comprehensive operation and service documentation is available (manuals 08449-90011 and 08449-90005) covering installation, performance verification, and component replacement procedures.