The Keysight N8481H is a thermocouple power sensor designed for precise average power measurements across a broad frequency range. This sensor is engineered to support demanding applications in various technical fields. Its design incorporates an EEPROM for storing calibration factors, which eliminates the need for manual entry into the power meter and reduces potential errors. The N8481H offers a wide dynamic range and high linearity, contributing to accurate and repeatable power measurements. Its compatibility with a range of Keysight power meters, often with a simple firmware upgrade, facilitates integration into existing test systems.
### Technical Specifications
**Frequency Range:**
* 10 MHz to 18 GHz
**Power Range:**
* Standard Option (N8481H-STD): -15 dBm to +35 dBm
* CFT Option (N8481H-CFT): -10 dBm to +35 dBm
* Typical linearity of less than 1%
**Calibration:**
* Features EEPROM for automatic download of calibration factors, linearity, and temperature corrections
* Traceable to the U.S. National Institute of Standards and Technology (NIST)
**Accuracy and Performance:**
* Power Linearity: Less than 1%
* Excellent SWR (Standing Wave Ratio) for reduced mismatch uncertainty
* Highly accurate power repeatability
* Typical linearity at 25°C for the N8481H/2H:
* –1 to +20 dBm: ± 0.35%
* 17 to 30 dBm: ± 0.60%
* 30 to 35 dBm: ± 0.35%
* 29 to 40 dBm: ± 0.35% (Note: This power level range appears to be a typo and likely refers to a different sensor model or is misstated in the source, as the N8481H max power is +35 dBm. It’s included here as it appears in the source material.)
* 40 to 44 dBm: ± 1.21% (Note: This power level range appears to be a typo and likely refers to a different sensor model or is misstated in the source, as the N8481H max power is +35 dBm. It’s included here as it appears in the source material.)
**Electrical:**
* Power Consumption: Not specified in provided documentation.
* Input Connector: Typically a Type N or similar RF connector, depending on the specific configuration and applicable standards. (Connector type not explicitly stated in search results for N8481H specifically, but implied by typical sensor design.)
**Interfaces and Compatibility:**
* SCPI codes compatible with the 8480 series (Option CFT)
* SCPI codes compatible with E-Series sensors (standard option)
* Compatible with EPM (N1913/14A, E4418/19B), EPM-P (E4416/17A), P-Series (N1911/12A) power meters. Firmware upgrade may be required for some meters.
* **Incompatible with:** Keysight 43x, E1416A, N8262A power meters, 5314x microwave counters, and E7495x base station test sets.
**Physical:**
* Weight:
* Net: 0.234 kg (0.52 lb)
* Shipping: 0.954 kg (2.10 lb)
* Operating Temperature: 0 °C to 55 °C
* Storage Temperature: -40 °C to 70 °C
* Operating Humidity: Maximum 95% RH at 40 °C (non-condensing); Minimum 15% RH at 40 °C (non-condensing)
* Storage Humidity: Up to 90% RH at 65 °C (non-condensing)
* Altitude: Up to 4600 m (15,000 ft)
### Why Choose Aumictech for Keysight N8481H?
At Aumictech, we specialize in supplying high-end RF and microwave test equipment. Whether you need precise average power measurements from 50 MHz to 50 GHz, a wide dynamic range for demanding applications, or robust compatibility with your existing test infrastructure, our team ensures the Keysight N8481H delivers maximum performance for your application.
