| Option Category | # # NTSC POST-PROCESSING OPTIONS # |
| Description | This option sets the horizontal scanline duration for NTSC signal processing (in µsec). |
| Full Command | -yiq_scan_time <float> |
| Alt. Command | none |
| Reverse Command | none |
| Example | mame64 pacman -hlsl_enable -yiq_enable -yiq_scan_time 50.1 |
| mame.ini Command | yiq_scan_time |
| Command Default | 52.6 |
| Argument Format | <float> |