The Keysight (Agilent/HP) 8491A is a fixed coaxial attenuator providing precision attenuation, flat frequency response, and low SWR from DC to 12.4 GHz. It features Type-N connectors and is available in standard attenuation values from 3 dB to 60 dB, making it ideal for maintaining accurate signal levels in RF and microwave measurement systems.
Specifications
RF and Electrical Specifications
| Parameter | Value |
|---|---|
| Frequency Range | DC to 12.4 GHz |
| Impedance | 50 Ω |
| Maximum VSWR | 1.2 (DC to 4 GHz); 1.3 (4 to 12.4 GHz) |
Power Handling
| Parameter | Value |
|---|---|
| Maximum Average Power | 2 W |
Mechanical and Physical Specifications
| Parameter | Value |
|---|---|
| Connector Type 1 | Type-N male |
| Connector Type 2 | Type-N female |
Configurations and Options
| Parameter | Value |
|---|---|
| Available Attenuation Values | 3 dB, 6 dB, and 10 dB to 60 dB in 10 dB increments |
| Calibration Data | Swept-frequency tested; calibration points provided on nameplate |
Performance
| Parameter | Value |
|---|---|
| Attenuation Accuracy (3, 6 dB) | ±0.3 dB |
| Attenuation Accuracy (10, 20 dB) | ±0.5 dB |
| Attenuation Accuracy (30 dB) | ±1.0 dB |
| Attenuation Accuracy (40, 50 dB) | ±1.5 dB |
| Attenuation Accuracy (60 dB) | ±2.0 dB |
Technology
RF / Microwave