The Keysight (formerly Agilent/HP) 8494G is a programmable step attenuator operating from dc to 4 GHz. It provides an attenuation range of 0 to 11 dB in 1 dB steps, offering exceptional repeatability (typically 0.01 dB, 0.03 dB maximum) and reliability with an operating life exceeding 5 million cycles per section.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | 14-pin DIP (standard), 12-pin Viking (Option 016) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 24 Vdc (Standard), 5 Vdc (Option 011) |
| Operating Temperature | 0 to +55 °C |
RF/Electrical Specifications
| Parameter | Value |
|---|---|
| Frequency Range | dc to 4 GHz |
| Attenuation Range | 0 to 11 dB |
| Step Size | 1 dB |
| Insertion Loss (0 dB position) | 0.6 dB + 0.09 dB/GHz |
| Maximum VSWR | 1.5 |
| Maximum Average Power | 1 W |
| Maximum Peak Power | 100 W |
Attenuation Accuracy & Performance
| Parameter | Value |
|---|---|
| Attenuation Repeatability | 0.03 dB maximum (typically 0.01 dB) |
Drive & Switching Characteristics
| Parameter | Value |
|---|---|
| Switching Speed | 20 ms maximum (including contact settling) |
| Operating Life (Cycles) | > 5 million cycles per section |
| Control Type | Programmable |
| DC/Control Connector Type | 14-pin DIP (standard); 12-pin Viking (optional) |
Physical & Mechanical
| Parameter | Value |
|---|---|
| RF Connectors (Input/Output) | Choice of Type-N female, SMA female, or APC-7 |
Options & Configurations
| Parameter | Value |
|---|---|
| Calibration Documentation Options | Option 890 (NIST traceable data for SWR and attenuation) |
| Series Interconnect Compatibility | Compatible with Agilent 11716A/B/C interconnect kits |
Performance
| Parameter | Value |
|---|---|
| Nominal Impedance | 50 Ω |
Design & Physical
| Parameter | Value |
|---|---|
| Number of Sections | 4 (1 dB, 2 dB, 4 dB, 4 dB) |
| Switching Mechanism | Magnetic Latching |
Technology
RF/Microwave
Applications
Test & Measurement