RadCon 1.1 Conducted-Immunity
The frequency range of a calibration is selected here. The start/stop frequencies as well as the step size can be selected. The steps can be log (percentage), linear, or can be defined in a frequency list file. The program has a nice facility where the frequency list file can be created. (back to top)
Information about the calibration levels are entered here. The limit can be either a flat level, expressed in volts, or can be defined in a text file for limit lines that are sloped (such as GR1089). Parameters for the signal generator levels can also be set, such as the starting level, maximum level (to protect the equipment) and the maximum step size. The data to be recorded, specifically the forward and reverse power levels, can also be selected, provided a power meter and directional coupler are connected. A maximum forward power can also be set, giving further protection for the equipment. The dwell time can also be set, which allows for instrument settling before taking a measurement. (back to top)
Calibration Coupling Method
Several methods exist for coupling the interfering signal onto the cable under test. This screen allows the coupling method to be selected. What is really being selected here is the adjustment to the measured signal given the type of calilbration fixture being used. A 150 ohm CDN or EM clamp will have a 15.5 dB factor added to the measured signal, while a 50 ohm BCI fixture will have either 6 dB or 0 dB added, depending on what test standard the calibration is for. (back to top)
Text information about the calibration is entered here. This is text information to be displayed for the benefit of the test operator. After all the required information is entered, the data can be saved to a calibration-setup file. When the calibration needs to be performed again in the future, the file can simply be loaded without requiring all the data to be entered again. After this, then the calibration run can start. (back to top)
This is the screen where the actual calibration run is performed. The estimated time, number of steps and frequency range are displayed at the bottom. Along the top, the calibration information is displayed. The grid in the middle is a scrolling display of the calibration file information being recorded. Once the calibration run is finished, the data can be saved to disk.
The calibration leveling routine has several nice features that improve accuracy as well as speed. Depending on instrumentation, it is possible to perform a normal CDN or EM-Clamp calibration to IEC 1000-4-6, from 150kHz to 230MHz in as little as 20 minutes. This includes measuring and limiting the forward power. Compared to one of the popular software packages on the market, this is over six times faster and the resulting calibration data will be much more repeatable. Also, one calibration can be performed and used for multiple test levels. (see Test Definition, Cal File) Being able to perform calibrations quickly will make the lab much more productive.