| TV System |
PAL (B) |
| Channel Bandwidth |
7 MHz |
| Vision Carrier |
1.25 MHz above lower edge of channel |
| Primary Audio Carrier |
5.5 MHz above vision carrier |
| Secondary Audio Carrier |
242.1875 KHz above primary sound carrier |
| Vision Modulation |
Negative amplitude modulation ( AM ) |
| Lines per picture |
625 lines, Interlaced 2:1 |
| Line frequency |
15.625 KHz |
| Field frequency |
50 Hz |
| Colour Subcarrier frequency |
4.43361875 MHz |
| Aspect ratio |
4:3 |
| Horizontal synch pulse amplitude |
100% carrier amplitude |
| Front porch |
1.3 - 1.8 us |
| Line blanking interval |
11.8 - 12.3 us |
| Black & Blanking level |
76% peak carrier level |
| White level |
20% peak carrier level |
| Sound Modulation |
FM |
| Sound deviation |
+/- 50 KHz |
| Audio pre-emphasis |
50 us |
