User`s guide

Chapter 4 Calibration Procedures

Test Considerations

For optimum performance, all procedures should comply with the

following recommendations:

• Assure that the calibration ambient temperature is stable and

between 18 °C and 28 °C. Ideally, the calibration should be performed

at 23 °C

±1 °C.

• Assure ambient relative humidity is less than 80%.

• Allow a 1-hour warm-up period before verification or adjustment.

• Keep the measurement cables as short as possible, consistent with

the impedance requirements.

• Use only RG-58 or equivalent 50

Ω cable.