Description

Features and Specifications of Keysight (Agilent/HP) 8481H:

• Frequency range:
  • 9 kHz to 110 GHz, sensor dependent
• Power range:
  • –70 dBm to +44 dBm (100 pW to 25 W), sensor dependent
• Single sensor dynamic range:
  • 90 dB maximum (E-Series sensors)
  • 50 dB maximum (8480 Series sensors)
  • 55 dB maximum (N8480 Series sensors)
• Display units:
  • Absolute: Watts or dBm
  • Relative: Percent or dB
• Display resolution:
  • Selectable resolution of 1.0, 0.1, 0.01, and 0.001dB in Log mode, or 1 to 4 digits in linear mode
• Default resolution:
  • 0.01 dB in log mode, 3 digits in linear mode
• Accuracy
  • Absolute: ±0.02 dB (log) or ±0.5% (linear). Please add the corresponding power sensor linearity percentage from Tables 6, 9 and 10 (for the E-Series sensors), and Table 14 (for the 8480 Series sensors) to asses the overall system accuracy.
  • Relative accuracy: ±0.04 dB (log) or ±1.0% (linear). Please add the corresponding power sensor linearity percentage from Tables 6, 9 and 10 (for the E-Series sensors), and Table 14 (for the 8480 Series sensors) to asses the overall system accuracy.

Zero set (digital settability of zero): 
Sensor dependent (refer to Table 1). For E-Series sensors, this specification applies to a zero performed when the sensor input is not connected to the POWER REF.

Zero drift of sensors:
Sensor dependent, refer to Table 1. For E9300 sensors, refer to Table 11 for complete data.

Measurement noise:
Sensor dependent, refer to Table 1 and Table 2. For E9300 sensors, refer to Table 11 for complete data.

Effects of averaging on noise:
Averaging over 1 to 1024 readings is available for reducing noise. Table 1 provides the measurement noise for a particular sensor with the number of averages set at 16 (for normal mode) and 32 (for x2 mode). Use the noise multiplier, for the appropriate mode (normal or x2) and number of averages, to determine the total measurement noise value.

Example:
8481D power sensor, normal mode,
number of averages = 4
Measurement noise calculation:
(<45 pW x 2.75) = <121 pW

Power reference
Power output:
1.00 mW (0.0 dBm). Factory set to ±0.4% traceable to the National Physical Laboratory (NPL), UK1.

Accuracy:

• For two years:
  • ±0.5% (23 ± 3 °C)
  • ±0.6% (25 ± 10 °C)
  • ±0.9% (0 to 55 °C)
• Frequency:
  • 50 MHz nominal
• SWR: 1.
  • 06 maximum
  • (1.08 maximum for Option 003)
  • Connector type: Type-N (f), 50

Specifications describe the instrument’s warranted performance and apply after a 30-minute warm-up. These specifications are valid over its
operating/environmental range unless otherwise stated and after performing a zero and calibration procedure.

Supplemental characteristics (shown in italics) are intended to provide additional information, useful in applying the instrument by giving
typical (expected), but not warranted performance parameters. These characteristics are shown in italics or labeled as “typical”, “nominal” or
“approximate”.