FORMAT MII (IEC 60B (Sec) 191)
A ½-inch professional format based on a metal particle tape cassette conforming to the VHS outline. The earlier M-l system, not widely used in PAL, used frequency multiplexing to accommodate luminance and chrominance components on the same tape track. M-ll uses one track for the luminance and a second track for the two time-compressed colour difference signals. The format includes two longitudinal analogue and two FM audio channels.
| Signal system | |||
| Analogue, component. | |||
| Scanner | |||
| Geometry | Helical | ||
| No. of rotating heads | 10 (typical) | ||
| Scanner diameter | 75.9 | mm | |
| Rotation speed | 25 | rev/s | |
| Tracks/revolution | 4 | ||
| Head-to-tape speed | 5.9 | m/s | |
| Video track angle | degree | ||
| Video | Chroma | ||
| Track width | 56 | 36 | µm |
| Track pitch | 56 | 36 | µm |
| Azimuth | +15 | -15 | degree |
| Tape Properties | |||
| Coercivity | 1500 | Oe | |
| Type | Metal particle | ||
| Width | 12.65 | mm | |
| Thickness (total) | 14 | µm | |
| Tape Consumption | |||
| Linear | 66.295 | mm/s | |
| Areal | 0.05 | m²/min | |
| Shelfvolume | 483 | cm³/h | |
| Electrical Characteristics | |||
| Video | Chroma | ||
| Sync tip carrier frequ. | 6.63 | 4.71 | MHz |
| Blanking | 7.40 | MHz | |
| Peak white | 9.20 | 6.20 | MHz |
| Peak positive video | 7.00* | MHz | |
| Peak negative video | 5.40* | MHz | |
| Shortest wavelength | 0.64 | µm | |
* For 100% colour bars. IEC 60B (Sec) 191
