S-VHS FORMAT (IEC60B(Sec)199)
Super VHS uses higher coercivity tape in standard VHS outline cassettes together with a higher luminance carrier frequency and bandwidth. The result is improved picture definition (>400 horizontal lines), which challenges the performance of many domestic TV receivers and better signal to noise. The longitudinal and FM audio features are as normal VHS. S-VHS cassettes have an ident hole to enable S-VHS recorders to switch automatically between VHS and S-VHS standard according to the tape inserted.
| Signal system | ||
| Analogue, composite, 'Colour under'. | ||
| Scanner | ||
| Geometry | Helical | |
| No. of rotating heads | 2 * | |
| Scanner diameter | 62.0 | mm |
| Rotation speed | 25 | rev/s |
| Tracks/revolution | 2 | |
| Head-to-tape speed | 4.85 | m/s |
| Video track angle | 57.83 | degree |
| Track width | 49.0 | µm |
| Track pitch | 49.0 | µm |
| Azimuth | ±6.0 | degree |
| Tape Properties | ||
| Coercivity | 850 | Oe |
| Type | Cobalt modified oxide | |
| Width | 12.65 | mm |
| Thickness (total) | 21.0 (max) | µm |
| Tape Consumption | ||
| Linear | 23.39 | mm/s |
| Areal | 0.017 | m²/min |
| Shelf volume | 120 (E-240) | cm³/h |
| Electrical Characteristics | ||
| Sync tip carrier frequ. | 5.4 | MHz |
| Peak white | 7.0 | MHz |
| Chroma s/c | 0.627 ** | MHz |
| Shortest wavelength | 0.63 | µm |
* More heads are sometimes provided for improved slow motion etc.
** Strictly fsc + (44 fh + 1,953) Hz.
IEC60B(Sec)199
