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| International Transmission
Standards |
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| a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | r | s | t | u | v | y | z |
| Country | Lines/Colour | Voltage | Frequency |
| Uganda | 625 PAL | 240V | 50Hz |
| Ukraine | 625 SECAM | 220/127V | 50Hz |
| Umm Al-Quwain | 625 PAL | ||
| United Arab Emirates | 625 PAL | 240/220V | 50Hz |
| United Kingdom | 625 PAL | 230V | 50Hz |
| Upper Volta | 625 SECAM V | ||
| Uruguay | 625 PAL N | 220V | 50Hz |
| USA | 525 NTSC | 240/120V | 60Hz |
| Uzbekistan | 625 SECAM | 220/127V | 50Hz |