The Keysight Technologies (Agilent HP) 8495D is a manual coaxial step attenuator designed for high-frequency RF and microwave applications from DC up to 26.5 GHz. It offers attenuation from 0 to 70 dB in precise 10 dB steps, featuring excellent repeatability of 0.01 dB typical and an exceptionally long lifespan of over 5 million cycles per section. Using precision gold-plated leaf springs, it is highly reliable and suited for precise signal level control in laboratory testing and measurement systems.
Specifications
Physical
| Parameter | Value |
|---|---|
| Operating Temperature | 0 to +55 °C |
| Dimensions (W×H×D) | 38 mm × 56 mm × 133 mm |
| Weight | 0.31 kg |
RF Performance Specifications
| Parameter | Value |
|---|---|
| Frequency Range | DC to 26.5 GHz |
| Attenuation Range | 0 to 70 dB |
| Attenuation Step Size | 10 dB |
| Nominal Impedance | 50 Ω |
| Insertion Loss at 0 dB | 0.4 dB + 0.09 dB/GHz |
| Maximum VSWR (DC to 12.4 GHz) | 1.35 |
| Maximum VSWR (12.4 to 18 GHz) | 1.5 |
| Maximum VSWR (18 to 26.5 GHz) | 1.7 |
| Maximum RF Input Power (Average) | 1 W |
| Maximum RF Input Power (Peak) | 100 W |
| Maximum RF Peak Power Pulse Width | 10 µs |
| Maximum RF Peak Power Duty Cycle | 0.001 |
| Attenuation Accuracy at 10 dB (DC to 12.4 GHz) | ±0.3 dB |
| Attenuation Accuracy at 10 dB (12.4 to 18 GHz) | ±0.4 dB |
| Attenuation Accuracy at 10 dB (18 to 26.5 GHz) | ±0.5 dB |
| Attenuation Accuracy at 20 dB (DC to 12.4 GHz) | ±0.5 dB |
| Attenuation Accuracy at 20 dB (12.4 to 18 GHz) | ±0.6 dB |
| Attenuation Accuracy at 20 dB (18 to 26.5 GHz) | ±0.7 dB |
| Attenuation Accuracy at 30 dB (DC to 12.4 GHz) | ±0.7 dB |
| Attenuation Accuracy at 30 dB (12.4 to 18 GHz) | ±0.8 dB |
| Attenuation Accuracy at 30 dB (18 to 26.5 GHz) | ±1.0 dB |
| Attenuation Accuracy at 40 dB (DC to 12.4 GHz) | ±1.0 dB |
| Attenuation Accuracy at 40 dB (12.4 to 18 GHz) | ±1.2 dB |
| Attenuation Accuracy at 40 dB (18 to 26.5 GHz) | ±1.6 dB |
| Attenuation Accuracy at 50 dB (DC to 12.4 GHz) | ±1.2 dB |
| Attenuation Accuracy at 50 dB (12.4 to 18 GHz) | ±1.6 dB |
| Attenuation Accuracy at 50 dB (18 to 26.5 GHz) | ±2.3 dB |
| Attenuation Accuracy at 60 dB (DC to 12.4 GHz) | ±1.6 dB |
| Attenuation Accuracy at 60 dB (12.4 to 18 GHz) | ±2.0 dB |
| Attenuation Accuracy at 60 dB (18 to 26.5 GHz) | ±2.9 dB |
| Attenuation Accuracy at 70 dB (DC to 12.4 GHz) | ±2.0 dB |
| Attenuation Accuracy at 70 dB (12.4 to 18 GHz) | ±2.4 dB |
| Attenuation Accuracy at 70 dB (18 to 26.5 GHz) | ±3.5 dB |
RF Port Characteristics
| Parameter | Value |
|---|---|
| RF Connector Type | 3.5 mm |
| RF Connector Gender | Female |
| Repeatability | 0.01 dB typical |
| Repeatability Life | 0.03 dB maximum |
Control and Electromechanical Specifications
| Parameter | Value |
|---|---|
| Actuation Type | Manual |
| Switching Life | 5 million cycles per section |
Physical and Mechanical Characteristics
| Parameter | Value |
|---|---|
| Net Weight | 310 g (11 oz) |
Environmental Specifications
| Parameter | Value |
|---|---|
| Operating Temperature Range | 0 to +55 °C |
| Storage Temperature Range | -40 to +75 °C |
| Operating Humidity Range | 95% RH @ 40 °C |
| Operating Shock | 10 g (6 ms) |
| Non-operating Shock | 400 g (2 ms) |
Ordering and Configuration Options
| Parameter | Value |
|---|---|
| Calibration Documentation Option | Option 890 (NIST traceable SWR and attenuation data) |
Environmental
| Parameter | Value |
|---|---|
| Maximum Altitude (Operating) | 4600 m (15000 ft) |
| Maximum Altitude (Storage) | 15200 m (50000 ft) |
Internal Construction
| Parameter | Value |
|---|---|
| Number of Sections | 3 |
| Section Attenuation Values | 10, 20, 40 dB |
Technology
Coaxial Step Attenuator
Applications
RF & Microwave Signal Level Control, Laboratory Test & Measurement