The Keysight Technologies (formerly Agilent) 84907K is a compact, programmable coaxial step attenuator designed for high-performance measurements up to 26.5 GHz. It delivers exceptional attenuation repeatability of better than 0.03 dB and a long operating life of over 5 million cycles per section. Built with miniature thin-film tantalum nitride attenuation cards on sapphire substrates, it offers low SWR and precise performance, making it highly suitable for integration into automated test equipment (ATE) and instrument systems.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | 10-pin socket |
Physical
| Parameter | Value |
|---|---|
| Operating Temperature | 0 to +55 °C |
| Dimensions (W×H×D) | 121.6 mm x 51.6 mm x 40.4 mm |
| Weight | 0.229 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 (0 dB) | 0.6 dB + 0.03 dB/GHz |
| Maximum VSWR (DC to 12.4 GHz) | 1.25 |
| Maximum VSWR (12.4 to 26.5 GHz) | 1.5 |
| RF Repeatability | 0.03 dB (maximum) |
| Maximum RF Input Power (Average) | 1 W |
| Maximum RF Input Power (Peak) | 100 W |
Electromechanical & Switching
| Parameter | Value |
|---|---|
| Switching Cycle Lifetime | Greater than 5 million operations per section |
Physical & Mechanical Specifications
| Parameter | Value |
|---|---|
| RF Input/Output Connectors | Choice of 3.5 mm female or 3.5 mm male/female |
| Programming Connector | 10-pin socket |
| Attenuation Card Material | Thin-film tantalum nitride on sapphire substrate |
Environmental Specifications
| Parameter | Value |
|---|---|
| Non-Operating Temperature Range | -40 °C to +75 °C |
Ordering & Configurations
| Parameter | Value |
|---|---|
| Driver Unit Compatibility | Keysight 11713B/C attenuator/switch drivers |
Performance
| Parameter | Value |
|---|---|
| Attenuation Accuracy (DC to 12.4 GHz) | ±0.3 dB to ±1.1 dB (attenuation dependent) |
| Attenuation Accuracy (12.4 to 18 GHz) | ±0.4 dB to ±1.5 dB (attenuation dependent) |
| Attenuation Accuracy (18 to 26.5 GHz) | ±0.5 dB to ±1.8 dB (attenuation dependent) |
| Switching Time | 20 ms (maximum, including settling time) |
| Number of Sections | 3 |
| Section Attenuation Values | 10, 20, 40 dB |
| RF Power Sensitivity | < 0.001 dB/W |
Electrical
| Parameter | Value |
|---|---|
| Solenoid Voltage Options | 5 V (Option 011) / 15 V (Option 015) / 24 V (Option 024) |
| Solenoid Current | 325 mA @ 5 V (Opt 011) / 188 mA @ 15 V (Opt 015) / 125 mA @ 24 V (Opt 024) |
| Solenoid Coil Resistance | 17 Ohm (Opt 011) / 90 Ohm (Opt 015) / 220 Ohm (Opt 024) |
Environmental
| Parameter | Value |
|---|---|
| Operating Altitude | 4,600 m |
| Storage Altitude | 15,200 m |
| Operating Shock | 10 g (6 ms) |
| Non-Operating Shock | 500 g (1.8 ms) |
| Operating Humidity | 95% RH @ 40 °C |
| Operating Vibration | 0.38 mm, 5 to 55 Hz, 3 g peak, 2 hours/axis |
| Non-Operating Vibration | 0.05 in, 10 to 55 Hz, 10 g peak, 20 min/axis |
Compliance
| Parameter | Value |
|---|---|
| Humidity Compliance | MIL-STD-202, Method 106D |
| Vibration Compliance | MIL-STD-202, Method 204C, Condition B |
| Shock Compliance | MIL-STD-202, Method 213B, Condition I |
Technology
Coaxial Step Attenuator
Applications
RF and Microwave Signal Attenuation