Keysight N8487S 50 GHz Thermocouple Power Sensor |APC Technology Group

N8487S

N8487S

Keysight Technologies

DC to 50 GHz Balance Thermocouple Power Sensor

-35 to 20 dBm, 2.4mm (male) Balance Thermocouple Power Sensor, DC to 50 GHz

The Keysight N8487S Series Balance Thermocouple Power Sensor is intended to be used as a measurement standard for RF power. N8487S is suitable for use in a microcalorimeter-based primary measurement standard and as a secondary or reference measurement standard. The new balance thermocouple power sensor offers a broad frequency range DC up to 50 GHz, high maximum input power of +20dBm, fast measurement speed/settling time as well as ease of maintenance.

The Keysight N8487S balance thermocouple power sensor introduces a new measurement method suitable for the highest echelon of RF power traceability. This power sensor is intended to be used within microcalorimeters as a primary measurement standard and individually as a transfer or reference measurement standard for RF power in coaxial sensors available in 2.4mm (male) connector styles. It is based on the calorimetric style power measurement where the measurement approach is direct DC to RF power substitution. The unknown RF power is substituted by traceable DC power.

The Keysight N8480S Series balance thermocouple power sensors are designed with dual thermopile power detectors constructed on a single chip. There are two sets of thermopiles in the detectors that are constructed to be closely matched for power cancellation and thermal stability. One set of thermopiles detects the heat generated by RF power in the load resistor and the second set of thermopiles detects heat generated by a DC-fed load resistor. When the DC power applied to the DC load resistor is equivalent to the RF power, the two thermopiles will be equal, and the sensor is at balance.

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Key Features
  • DC to 50 GHz operating frequency range
  • -35 to +20 dBm power measurement range 
  • RF to DC thermoelectric substitution measurement method
  • Less than 0.2 reflection coefficient magnitude across the operating frequency range at 50 Ohm reference impedance
  • DC resistance range from 50 Ohm to 2k Ohm
  • As a new transfer standard with faster measurement speed, broader frequency range, and ease of maintenance
Dimensions 72 mm x 26 mm x 28 mm
Power range -35 to 20 dBm
Sensitivity
  • RF Connector at 25 °C: 1080 mV/W 
  • DC connector at 25 °C: 2070 mV/W 
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Data Sheet Click here to view