2-4
Chapter 2
Specifications and Characteristics
Operating Temperature and Accuracy Enhancement
Operating Temperature and Accuracy
Enhancement
The operating temperature of the calibration module is important
because device dimensions (and therefore electrical characteristics)
change with temperature. The temperature of the calibration devices
and all connectors must be stable, and must be within the operating
limits given in
before use.
Measurement calibration, performance verification, and actual device
measurements must be made within
±
1˚ C of the error corrected
operating temperature range specification of the VNA.
If the ambient operating temperature drift of the VNA exceeds the
allowable error corrected temperature range, a new measurement
calibration must be performed to ensure optimum accuracy.
NOTE
Remember that your fingers are a heat source, so avoid unnecessary
handling of the module, connectors and cables.
Barometric Pressure and Relative Humidity
Barometric pressure and relative humidity also affect device
performance. The dielectric constant of the air between the inner and
outer conductors of these devices changes as the air pressure and
humidity change. Refer to
for environmental specifications
that include barometric pressure guidelines.
