The Keysight (Agilent HP) 8449B is a high-gain, low-noise microwave preamplifier operating from 1.0 GHz to 26.5 GHz. Designed to enhance the sensitivity of spectrum analyzers and EMI receivers, it features solid-state GaAs FET technology, excellent gain flatness, and low noise figures across its entire frequency range, making it an essential tool for low-level signal analysis and electromagnetic compatibility testing.
Specifications
Frequency & Gain
| Parameter | Value |
|---|---|
| Frequency Range | 1.0 GHz to 26.5 GHz |
| Minimum Gain | 23.5 dB |
| Gain Flatness (1.0 to 26.5 GHz) | ±4.5 dB |
Noise & Distortion
| Parameter | Value |
|---|---|
| Noise Figure (1.0 to 12.0 GHz) | ≤ 8.5 dB (7.0 dB typical) |
| Noise Figure (12.0 to 22.0 GHz) | ≤ 12.5 dB (10.3 dB typical) |
| Noise Figure (22.0 to 26.5 GHz) | ≤ 14.5 dB (11.2 dB typical) |
| Output Power at 1 dB Compression (P1dB) | ≥ +7 dBm (+10 dBm typical) |
Port Specifications
| Parameter | Value |
|---|---|
| RF Input Connector | 3.5 mm (female) |
| RF Output Connector | 3.5 mm (female) |
| Input Impedance | 50 Ω (nominal) |
| Output Impedance | 50 Ω (nominal) |
Options & Accessories
| Parameter | Value |
|---|---|
| Option 910 | Additional operating and service manual |
Performance
| Parameter | Value |
|---|---|
| Third-Order Intercept Point (IP3) | +17 dBm (typical) |
| Typical Noise Figure (1.0 to 12.0 GHz) | 7.0 dB |
| Typical Noise Figure (12.0 to 22.0 GHz) | 10.3 dB |
| Typical Noise Figure (22.0 to 26.5 GHz) | 12.5 dB |
| Typical Output Power at 1 dB Compression | +10 dBm |
| Typical Input VSWR (1.0 to 12.0 GHz) | 1.5 |
| Typical Input VSWR (12.0 to 26.5 GHz) | 2.0 |
| Typical Output VSWR (1.0 to 12.0 GHz) | 1.5 |
| Typical Output VSWR (12.0 to 26.5 GHz) | 1.8 |
Environmental
| Parameter | Value |
|---|---|
| Operating Humidity Range | Up to 95% RH @ 40 °C (non-condensing) |
| Operating Altitude Limit | Up to 4,570 m (15,000 ft) |
| Storage Altitude Limit | Up to 15,240 m (50,000 ft) |
| Pollution Degree | Degree 2 |
Compliance
| Parameter | Value |
|---|---|
| EMC Compliance | CISPR Pub 11/EN 55011 Group 1, Class A |
| Equipment Class | Class I (grounded) |
Maintenance
| Parameter | Value |
|---|---|
| Recommended Calibration Cycle | 12 months |
Power
| Parameter | Value |
|---|---|
| AC Line Fuse | 0.5 A / 250 V (100/120 V AC operation), 0.25 A / 250 V (220/240 V AC operation) |
Technology
Solid-state GaAs FET
Applications
RF & Microwave Signal Analysis, EMI/EMC Testing, Sensitivity Enhancement