AAT ICAS 2195 ✧ IDC radialSMH analog interface specification
- IDC radialSMH analog interface specification
- dial identification
- dial indices
- table 2195.1 ✧ unit configuration of radialSMH interface
- unit phasing
- table 2195.2 ✧ unit phasing of radialSMH interface
IDC radialSMH analog interface specification
this document describes AAT ICAS design specifications for the IDC radialSMH analog interface. ICAS IDC radialSMH is a special implementation of the radialSMH analog interface (please reference AAT ICAS 2190-IDC radialSMH analog interface specification).
dial identification
a dialSMH interface may be represented by any of the following: 'dialHour', 'Hour', 'dialXIITwice', 'dialAMPM', 'dialXXIV', 'dialSMH', 'SMH', and so forth.
dial indices
a dialSMH interface should incorporate a system of 60 indices consistent with AAT ICAS 2190-IDC radialSMH analog interface specification.
table 2195.1 ✧ unit configuration of radialSMH interface
| clock unit | completion of unit phase | number of unit indices | indice segment unit | top indice label |
|---|---|---|---|---|
| clock unit | completion of unit phase | number of unit indices | indice segment unit | top indice label |
| major unit | 12 hours (0.5 main unit) | 12 | 1 hour (60 minutes) | 12 |
| minor unit | 1 hour (60 minutes) | 60 | 1 minute (60 seconds) | 12 |
| subminor unit | 1 minute (60 seconds) | 60 | 1 second | 12 |
unit phasing
a dialSMH interface should incorporate a system of unit phasing consistent with AAT ICAS 2190-IDC radialSMH analog interface specification. all units are phased to the top indice ('12') at both 00:00 midnight and at 12:00 noon and rotate at the following rates:
table 2195.2 ✧ unit phasing of radialSMH interface
| clock unit | phasing rate |
|---|---|
| clock unit | phasing rate |
| major unit | major unit phase advances 1 major-unit segment (indicating 1 hour) upon completion of minor unit phase. completion of the major pointer cycle increments a 12-hour cycle from midnight to noon, or from noon to midnight. |
| minor unit | minor unit phase advances 1 minor unit segment upon completion of subminor unit phase. completion of minor unit phase advances major unit phase 1 major unit segment. |
| subminor unit | subminor unit advances 1 subminor segment every at every 1-second interval. completion of subminor unit phase advances minor unit phase 1 minor unit segment. |
particular pointers may rotate continuously or incrementally. please reference AAT ICAS 2210-IDC interface timesetting specifications for additional information.
aatideas.org document updated:
| scale | value | ||
|---|---|---|---|
| UCN | 12019 S19 Yellow | ||
| zone(UT) | t339 tt050 | ||
| 'ICAS in use' can accommodate calendar and clock formatting 'for all people, for all time'. | |||
| AD common year day | 139 | ||
| G | 2019 May 19 Sunday | ||
| UT | 08:08:14 | ||
| style legend | |||
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