## 2 Methodology
### Measurement Results with the Narda SRM-3006  
Graphs in Figures 6-11 present the results of the measurements conducted with the NARDA SRM-3006 at the six selected points mentioned in Table 1.  
The analysis of detected frequency bands in Figure 6 was made possible by providing a list of the frequency bands assigned to various mobile telecommunications operators, presented in Table 2.  
Based on the data from Table 2, the following frequencies and their associated technologies were identified at point 13:  
A--760 MHz 5G NR F--1977 MHz UMTS  
B--819 MHz Technological Neutrality G--2132 MHz UMTS  
C--945 MHz GSM/UMTS/LTE H--2415 MHz Technological Neutrality  
D--1754 MHz GSM/UMTS/LTE I--2568 MHz Technological Neutrality  
E--1837 MHz GSM/UMTS/LTE J--2687 MHz Technological Neutrality  
Similar lessons can be learned at the entrance to the outpatient consultations, which is not far from point 13. However, in point 13, other relevant technologies were identified, given that, due to the existence of a large, glazed surface next to the door, measurements were taken of technologies that are present only outside. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Operator** & \multicolumn{2}{c}{**Frequency Interval—Downlink [MHz]**} & \multicolumn{2}{c}{**Frequency Band [MHz]**} & \multicolumn{1}{c}{**Technology**} \\  & [[https://www.anacom.pt/render:jsp?categoryId=382989](https://www.anacom.pt/render:jsp?categoryId=382989)]([https://www.anacom.pt/render:jsp?categoryId=382989](https://www.anacom.pt/render:jsp?categoryId=382989)) & \multicolumn{2}{c}{**Band [MHz]**} & \\  & \multicolumn{2}{c}{**(accessed on 4 February 2022)**} & & \\ \hline MEO & 791.0 & 801.0 & 800 & Technological Neutrality \\ MEO & 950.9 & 958.9 & 900 & GSM/UMTS/WIMAX/LTE \\ MEO & 1845.0 & 1865.0 & 1800 & GSM/UMTS/WIMAX/LTE \\ MEO & 2149.9 & 2169.7 & 2100 & UMTS \\ MEO & 2670.0 & 2690.0 & 2600 & Technological Neutrality \\ NOS & 811.0 & 821.0 & 800 & Technological Neutrality \\ NOS & 943.1 & 950.9 & 900 & GSM/UMTS/WIMAX/LTE \\ NOS & 1825.0 & 1845.0 & 1800 & GSM/UMTS/WIMAX/LTE \\ NOS & 2130.1 & 2144.9 & 2100 & UMTS \\ NOS & 2650.0 & 2670.0 & 2600 & Technological Neutrality \\ Vodafone & 801.0 & 811.0 & 800 & Technological Neutrality \\ Vodafone & 930.0 & 935.0 & 900 & GSM/UMTS/WIMAX/LTE \\ Vodafone & 935.1 & 943.1 & 900 & GSM/UMTS/WIMAX/LTE \\ Vodafone & 1805.0 & 1825.0 & 1800 & GSM/UMTS/WIMAX/LTE \\ Vodafone & 2110.3 & 2130.1 & 2100 & UMTS \\ Vodafone & 2570.0 & 2595.0 & 2600 & Technological Neutrality \\ Vodafone & 2630.0 & 2650.0 & 2600 & Technological Neutrality \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Frequency bands of the Portuguese operators, based on the information provided by ANACOM. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Technology** & **Metric** & **Unit** & **Typical Thresholds** & **Interpretation** \\ \hline
5G NR & RSSI & dBm & \(>\)–85. –85/\(-\)100. \(<\)\(\leq\)–100 & Good Fair Poor \\ LTE & Power & dBm & \(>\)–85. –85/\(-\)95. \(\leq\)–95 & Good Fair Poor \\ NB-IoT & NRSSI & dBm & \(>\)–90. –90/\(-\)105. \(\leq\)–105 & Good Fair Poor \\ UMTS & RSCP & dBm & \(>\)–85. –85/\(-\)95. \(\leq\)–95 & Good Fair Poor \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Thresholds for each wireless technology and signal quality metric, expressed in dBm. The thresholds in Table 3 are based on 3 GPP standards (TS 36.133; TS 25.133), R&S®TSME6 equipment documentation, and Rohde & Schwarz guidelines for 5G NR, LTE, and NB-IoT network analysis. Figure 8: Graph of the measurements undertaken at point 17. Figure 6: Graph of the measurement performed at point 13. Letters A–J indicate the detected frequency bands, which correspond to the allocations presented in Table 2.  
Figure 7: Graph of measurements at the entrance to the outpatient consultations. Figure 11: Graph of the measurements undertaken at point 23. Figure 10: Graph of the measurements undertaken at point 21.