The Keysight (Agilent) 8481H is a high-performance thermocouple power sensor designed for precise average RF and microwave power measurements over a frequency range of 10 MHz to 18 GHz. Offering an extensive power range from -10 to +35 dBm (100 µW to 3 W), it features exceptionally low SWR to significantly reduce mismatch uncertainty. Built to provide reliable NIST-traceable calibration, it is compatible with standard modern power meters including EPM, EPM-P, and P-series models, as well as legacy platforms.
Specifications
Physical
| Parameter | Value |
|---|---|
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 38 mm × 30 mm × 149 mm |
| Weight | 0.22 kg |
RF Performance
| Parameter | Value |
|---|---|
| Frequency Range | 10 MHz to 18 GHz |
| Power Measurement Range (dBm) | -10 to +35 dBm |
| Power Measurement Range (Watts) | 100 µW to 3 W |
| Nominal Impedance | 50 Ω |
| Maximum SWR (8 to 12.4 GHz) | 1.30 |
| Maximum SWR (12.4 to 18 GHz) | 1.50 |
Physical & Interface Connections
| Parameter | Value |
|---|---|
| RF Input Connector Type | Type-N (male) |
| Sensor Cable Assembly Requirements | Keysight / Agilent 11730 Series |
Compatibility
| Parameter | Value |
|---|---|
| Compatible Power Meter Models | Keysight EPM, EPM-P, P-Series, E1416A VXI, 70100A, and 43X Series (435B, 436A, 437B, 438A) |
Environmental Specifications
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 to +75 °C |
Physical Dimensions & Weight
| Parameter | Value |
|---|---|
| Net Weight | 0.22 kg (0.5 lb) |
| Shipping Weight | 0.68 kg (1.5 lb) |
Performance
| Parameter | Value |
|---|---|
| Sensor Technology | Thermocouple |
Design
| Parameter | Value |
|---|---|
| Integrated Attenuator | 20 dB (calibrated with the sensor as a system) |
Power
| Parameter | Value |
|---|---|
| Power Source | Powered by the host power meter |
Technology
Thermocouple
Applications
RF & Microwave Power Measurement