Agilent/Keysight N8488A

The Agilent/Keysight N8488A is an average thermocouple power sensor engineered for precise power measurements from 10 MHz to 67 GHz. It delivers 1% accuracy across a dynamic range spanning -35 dBm to +20 dBm in a single measuring head, eliminating the need for multiple sensors. Built-in EEPROM automatically loads calibration factors into compatible power meters, removing manual entry overhead. Linearity performance reaches ±0.52% from -1 dBm to +15 dBm and ±0.80% from +15 dBm to +20 dBm. The sensor features low noise below 114 nW, excellent SWR between 1.05 and 1.34 across frequency bands, and integrated temperature compensation for operation between 0 and 55 °C. A 1.85 mm RF connector and compact form factor (38 mm × 30 mm × 121 mm, 0.162 kg) enable integration into space-constrained test setups. NIST-traceable calibration ensures measurement integrity for demanding metrology applications.

– Technical Specifications

• Frequency range: 10 MHz to 67 GHz (specification not warranted 67–70 GHz)
• Power measurement range: -35 dBm (316 nW) to +20 dBm (100 mW)
• Accuracy: 1%
• Linearity: ±0.52% (-1 dBm to +15 dBm); ±0.80% (+15 dBm to +20 dBm); <1% overall
• Noise: <114 nW maximum
• Standing wave ratio: 1.05 to 1.34 across frequency range
• RF connector: 1.85 mm
• Temperature range: 0 to 55 °C (with built-in compensation)
• Maximum input power: +20 dBm (100 mW)
• Dimensions: 38 mm (W) × 30 mm (H) × 121 mm (L)
• Weight: 0.162 kg

– Key Features

• Automatic calibration factor loading via embedded EEPROM
• Wide dynamic range in single measuring head
• SCPI code compatible
• NIST-traceable calibration
• Average/CW measurement support

– Typical Applications

• RF/microwave component characterization
• Manufacturing power verification
• R&D measurement workflows
• Component validation across X-band and higher frequencies

– Compatibility & Integration

Compatible power meters: EPM Series (N1913A/14A, E4418B/19B), EPM-P Series (E4416A/17A), P-Series (N1911A/12A). Not compatible with legacy 43x meters, E1416A, N8262A, 5314x microwave counters, or E7495x base station test sets. Firmware upgrades may be required for certain power meter models.