diff --git a/Interview Question/RF Basic Skills.md b/Interview Question/RF Basic Skills.md
index 0d793e1..f075d56 100644
--- a/Interview Question/RF Basic Skills.md	
+++ b/Interview Question/RF Basic Skills.md	
@@ -53,7 +53,7 @@ https://radioskot.ru/publ/teoria/fazovaya-chastotnaya-i-amplitudnaya-modulyacziy
 | **OFDM**                                                                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                    |                                                       |
 | **PSK**<br>Phase Shift Keying                                                             | Фазовая двоичная модуляция                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                    |                                                       |
 | **FDD**<br>Frequency Division Duplex                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                    |                                                       |
-| **DL** - Downlink <br>**UL** - Uplink<br>                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                    |                                                       |
+| **DL** - Downlink <br>**UL** - Uplink<br>                                                 | Относительно BS (BaseStation) <br>DL - исходящий трафик                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                    |                                                       |
 | **CC**  <br>Сomponent Сarrier                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                    |                                                       |
 | **LTE** <br>Long-Term Evolution                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                    |                                                       |
 | **RSSI** <br>Received Signal Strength Indicator                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                    |                                                       |