## 2 Materials and Methods
### Description of the Proposed Measurement Technique
#### 2.5.2 \"Signal-in-Section\" Check  
The graduation table is divided in half and the belonging of the signal to a section of the upper or lower half of the graduation table is determined. Only 3 rows from the table are selected: \(d=d0\), \(d=d_{\text{row}/2}\) and \(d=d_{\text{row}}\). The belonging the signal to the sections separated by the polyline \(\sigma(d_{\text{row}/2})\) is determined by condition 2:  
\[\left\{ \begin{array}{c}n=0\\ (\text{starting conditions})\\ if\left(\text{Im}_{d,\sigma}\leq\text{Im}<\text{Im}_{d+1,\sigma}\text{ or Im}_{j,k}\geq\text{Im}>\text{Im}>\text{Im}\text{Im}_{d+1,\sigma}\right)\text{ and }\left(\text{Re}\geq\frac{\left(\text{Re}_{d,\sigma}-\text{Re}_{d+1,\sigma} \right)\cdot\left(\text{Im}-\text{Im}_{d,\sigma}\right)}{\text{Im}_{d,\sigma} -\text{Im}_{d+1,\sigma}}+\text{Re}_{d,\sigma+1}\right)\text{, then }n=n+1\\ (\text{check of lower boundary})\\ if\left(\text{Im}_{d,\sigma+1}\leq\text{Im}<\text{Im}_{d+1,\sigma+1}\text{ or Im}_{d,\sigma+1}\geq\text{Im}>\text{Im}_{d+1,\sigma+1}\right)\text{ and }\left(\text{Re}>\frac{\left(\text{Re}_{d,\sigma+1}-\text{Re}_{d+1,\sigma+1} \right)\cdot\left(\text{Im}-\text{Im}_{d,\sigma+1}\right)}{\text{Im}_{d+1, \sigma+1}-\text{Im}_{d+1,\sigma+1}}+\text{Re}_{d,\sigma+1}\right)\text{, then }n=n+1\\ (\text{check of upper boundary})\\ if\left(\text{Im}_{d+1,\sigma}\leq\text{Im}<\text{Im}_{d+1,\sigma+1}\text{ or Im}_{d+1,\sigma}\geq\text{Im}>\text{Im}_{d+1,\sigma+1}\right)\text{ and }\left(\text{Re}>\frac{\left(\text{Re}_{d,\sigma+1}-\text{Re}_{d+1,\sigma+1} \right)\cdot\left(\text{Im}-\text{Im}_{d,\sigma}\right)}{\text{Im}_{d+1, \sigma+1}-\text{Im}_{d+1,\sigma+1}}+\text{Re}_{d,\sigma}\right)\text{, then }n=n+1\\ (\text{check of right boundary})\\ if\left(\text{Im}_{d,\sigma}\leq\text{Im}<\text{Im}_{d,\sigma+1}\text{ or Im}_{d,\sigma}\geq\text{Im}>\text{Im}_{d+1,\sigma+1}\right)\text{ and }\left(\text{Re}\geq\frac{\left(\text{Re}_{d,\sigma}-\text{Re}_{d+1,\sigma+1} \right)\cdot\left(\text{Im}-\text{Im}_{d,\sigma}\right)}{\text{Im}_{d+1, \sigma}-\text{Im}_{d,\sigma+1}}+\text{Re}_{d,\sigma}\right)\text{, then }n=n+1\\ (\text{check of left boundary})\\ n=1\text{ or }n=3\\ (\text{check of the number of intersections })\end{array} \right. \tag{3}\]  
where \(d\)--selected line number of the graduation table (\(d=0\) or \(row/2\)), \(\sigma\)--column number of the graduation table (\(\sigma=1\)... column). * If the condition is met for \(d=0\), then the signal belongs to the upper half of the table. In this case, for the next iteration, points from the upper half of the table (\(d=0\), \(d=row/4\) and \(d=row/2\)) are selected;
* If the condition is met for \(d=row/2\), then the signal belongs to the lower half of the table. In this case, for the next iteration, points from the lower half of the table (\(d=0\), \(d=row3/4\) and \(d=row\)) are selected;
* If the condition is met met neither for \(d=0\), nor for \(d=row/2\), then either the signal belongs to one of the extrapolated sections, or the signal is in one of the dead zones of the algorithm. In this case, the signal is checked for belonging to one of the extrapolated sections of the table;
* If the condition is met for none of the interpolated sections of the graduation characteristic, then the signal belongs to one of \"dead zones\" of the algorithm; in this case, the signal is checked for belonging to \"dead zones\";
* If the condition is met for none of \"dead zones\" of the algorithm, then the signal is an error and is not subject to further processing. The signal can belong only to one section of the table; when determining the section, it is necessary to proceed to the next iteration. In the next iteration, the involving half of the graduation table is divided in half, the belonging the signal to one of the sections of a quarter of the table is checked by analogy with previous iteration. It should be marked that the case when the signal does not belong to any quarter of the graduation table cannot occur. The result of this calculation in the