The Keysight (formerly Agilent/HP) 8495H is a programmable step attenuator operating from dc to 18 GHz, offering an attenuation range of 0 to 70 dB in 10 dB steps. It features exceptional repeatability (typically 0.01 dB) and a reliable magnetic-latching design with a switching life of over 5 million cycles per section. Available with a choice of RF connectors and coil control voltages, its fast 20 ms switching time makes it ideal for automated test systems and high-precision RF/microwave measurement setups.
Specifications
Physical
| Parameter | Value |
|---|---|
| Operating Temperature | 0 to +55 °C |
| Weight | 0.312 kg |
General Specifications
| Parameter | Value |
|---|---|
| Frequency Range | dc to 18 GHz |
| Attenuation Range | 0 to 70 dB |
| Attenuation Step Size | 10 dB |
| Impedance | 50 Ω |
RF Performance
| Parameter | Value |
|---|---|
| Insertion Loss (0 dB state) | 0.4 dB + 0.07 dB/GHz |
| Maximum SWR (dc to 8 GHz) | 1.35 |
| Maximum SWR (8 to 12.4 GHz) | 1.5 |
| Maximum SWR (12.4 to 18 GHz) | 1.7 |
| Attenuation Repeatability | 0.03 dB maximum (0.01 dB typical) |
Power Handling
| Parameter | Value |
|---|---|
| Maximum Average Input Power | 1 W |
| Maximum Peak Input Power | 100 W |
Switching & Drive Characteristics
| Parameter | Value |
|---|---|
| Actuator Type | Magnetic Latching |
| Switching Speed | 20 ms maximum (including contact settling) |
| Switching Life (cycles) | > 5 million cycles per section |
Connectivity & Interfaces
| Parameter | Value |
|---|---|
| RF Connector Options | Type-N female, SMA female, or APC-7 (option dependent) |
Options & Configurations
| Parameter | Value |
|---|---|
| Supply Voltage Options | 5 Vdc, 15 Vdc, or 24 Vdc (Options 011, 015, 024) |
| Interconnect Kits | 11716A/B/C (for series connection with 8494/6/7 attenuators) |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature | -40 to +75 °C |
| Humidity | 95% RH at 40 °C |
| Vibration | 0.05 in. double amplitude, 10 to 55 Hz |
| Shock (Non-operating) | 50 G, 11 ms, half-sine |
Control & Programming
| Parameter | Value |
|---|---|
| Minimum Drive Pulse Width | 20 ms |
Performance
| Parameter | Value |
|---|---|
| Attenuation Accuracy (10 dB) | ±0.5 dB |
| Attenuation Accuracy (20 dB) | ±0.7 dB |
| Attenuation Accuracy (30 dB) | ±0.9 dB |
| Attenuation Accuracy (40 dB) | ±1.2 dB |
| Attenuation Accuracy (50 dB) | ±1.5 dB |
| Attenuation Accuracy (60 dB) | ±1.8 dB |
| Attenuation Accuracy (70 dB) | ±2.1 dB |
Physical & Design
| Parameter | Value |
|---|---|
| Number of Sections | 3 (10, 20, 40 dB) |
Technology
Programmable Step Attenuator
Applications
RF & Microwave Test