# 12.9.2 Interference calculation GUI When the simulation is finished, the dRSS and the iRSS vectors are stored. You may proceed to use the facilities of the Interference Calculation Engine (ICE) in order to evaluate the probability of interference for the simulated scenario. The probability of interference is calculated by the ICE with the following choice of input parameters:
- Calculation mode: compatibility or translation; - Which type of interference signal is considered for calculation: unwanted, blocking, intermodulation, overloading or their combination; - Interference criterion: C/I, C/(N+I), (N+I)/N or I/N.
If more than one interference calculation was done (i.e. with different combination of interference criterion), you may scroll through all of them by using the Previous / Next buttons. Interference calculation results:
- single interference probability value (compatiblity mode); - probability as function of the translation parameter (translation mode).
When the compatiblity mode is chosen, a single-figure estimate of the probability of interference is calculated; When the Translation mode is chosen, you may calculate and display as chart the probability of interference as function of one of the following input parameters:
- Output power of Interfering transmitter; - Blocking response level of Victim receiver; - Intermodulation response level of Victim receiver.
You are able to save the results of the translation mode using the “save translation button”.
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![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/cWEmczTfQqCz8g4U-image.png)
**Figure 271: Interference calculation panel**
**Table 61: Parameters to calculate the probability of interference**
**ID** **Description** **Comments**
**1** Calculation mode/ Compatibility: Compatibility: Gives the probability of being interfered by the Blocking interference and/or by the Unwanted interference and/or by intermodulation interference. The result is a probability of interference.
**2** Calculation mode/ Translations: In this case all the following parameters should be independent from frequencies: Receiver blocking response mask, Receiver intermodulation rejection mask, power distribution of interfering transmitter, Unwanted emission floor mask. Calculation of the probability of interference as a function of the reference parameters (Power supplied by the It for the unwanted, Blocking response level of the Vr for the Blocking, And intermodulation rejection level for the Vr). These parameters are varying on user-defined definition domain defined by the number of points where the software has to calculate the probability. The result is a graph.
**3** Signal type Choose the interference studied: Unwanted and/or Blocking and/or Intermodulation and Overloading in case simulated.
**4** Interference criterion Choose between C/I, C/(N+I), (N+I)/N, I/N)
**5** Events Total number of simulated events, in case Translation multiplied by the number of points
**6** Events (dRSS > sensitivity) It represents the number of events taken into account for the calculation. The accuracy of the calculated results relates to this ratio, i.e. the less this number the higher the inaccuracy.
**7** Calculation control Delete a result, and see the last results
**8** Translation parameters: If translation was chosen Number of points between the min and max, where the software will calculate the probability.
**9** Result / Compatibility Probability of interference: 1 - always interfered, 0 - never interfered
**10** Result / Translation Gives the graph, showing the resulting probability of interference vs. the selected values of translation parameter. The average of the graph depends of the number of points, but the higher the number is, the longer the calculations are.
**11** Save translation button You are able to save the results of the translation mode
![image.png](https://wiki.cept.org/uploads/images/gallery/2026-04/scaled-1680-/c6gxUtywMdxEz5Rk-image.png)
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