Altitude Switch Requirements Note: This problem was taken from an example by Steve Miller at Rockwell Collins. I have not altered the original example al though i would have designed the switch slightly differently. The Altitude Switch(As W)is a reusa ble component that turns power on to a Device of Interest(DoI) when the aircraft descends below a threshold altitude(2, 000 feet)above ground level(AGL). The As W receives altitude information from an analog radio altimeter and from two digital radio altimeters, with the altitude ta ken as the lowest valid altitude seen if the altitude cannot be determined for more than two seconds, the as w indicates a fault by failing to strobe a watchdog timer. a fault is also indicated if internal failures are detected in the asw. The detection of a fault turns on an indicator lamp within the cockpit The asw receives a status indication from the doi indicating whether the doi is powered on. If the doi does not indicate that it is powered on within two seconds fter power is applied a fault is indicated by failing to strobe the watchdog timer The asw does not apply power to the doi if the doi is already powered on. If the doi is powered off after the aircraft descends below the altitude threshhold the asw does not reapply power to the doi unless the aircraft again descends below the threshold altitude The asw also accepts an inhibit signal that prevents it from turning on power to the doi or indicating a fault. All other aSw functions are unaffected by the inhibit signal The asw also accepts a reset signal that returns it to its initial state➂❙➃➅➄➇➆➅➄➇➈☞➉☞➊➌➋➎➍➏➆➐➄➒➑➔➓➣→➏➊✵↔✟➈☞➆➐↕➒➊✵➙❘➊✵➛✱➄➒➜ ➝➟➞✪➠➢➡✸➤➦➥➓P➆✍➜❫➧P↕➒➨❚➩☞➃➐➊✵➙➫➍➯➭✡➜➲➄➇➭✡➳✡➊❦➛➸➵✤↕➒➨❚➙ ➭✡➛➺➊✑➻P➭✡➙❘➧☞➃✍➊➼➩✱➽➾➋➎➄➒➊❦➚✡➊➶➪➟➆✍➃➐➃✍➊❦↕➲➭❱➄➹→➏➨❩➑➔➳✱➍q➊✵➃➐➃ ➘➨❚➃➐➃✍➆✍➛P➜✵➴➬➷➮➓✪➭◗➚✡➊❳➛☞➨✡➄❾➭✡➃➐➄➒➊✵↕➱➊✵➉➟➄➒➓☞➊❳➨✡↕➒➆✍✃✡➆✍➛✪➭✡➃❐➊✑➻P➭✡➙❘➧☞➃✍➊❒➭✡➃➐➄➒➓☞➨❚➈☞✃✡➓➟➷➯➍q➨❚➈☞➃➐➉❮➓✪➭◗➚❚➊❳➉☞➊✵➜➱➆✍✃❚➛☞➊❦➉➣➄➇➓P➊ ➜➱➍➏➆➅➄➇➑➔➓➼➜➒➃➐➆✍✃❚➓✱➄➇➃➅➽❫➉P➆➐❰✖➊✵↕➒➊❦➛✱➄➇➃➐➽✡➴✴Ï ➥➓☞➊Ð➂❙➃➅➄➇➆➅➄➇➈☞➉☞➊❫➋➎➍➏➆➅➄➇➑➔➓ÒÑ✤➂➌➋➎ÓÔÏ❒➆➐➜♦➭➣↕➱➊✵➈☞➜➒➭✡➩☞➃➐➊➹➑✵➨❚➙❘➧Õ➨❚➛☞➊✵➛✱➄❒➄➇➓✪➭✓➄❒➄➇➈☞↕➱➛☞➜♦➧Õ➨➢➍➯➊❦↕♦➨❚➛➦➄➒➨Ö➭ ×➊❦➚➎➆➐➑✵➊➏➨✡➵✖➷✻➛✟➄➒➊✵↕➱➊✵➜➱➄➌Ñ ➵✤➊✵➊✑➄✫Ï➹➭✡➩Õ➨➢➚❚➊➶✃❚↕➱➨❚➈☞➛☞➉Ò➃✍➊✑➚❚➊❦➃❘ÑÞ➂❥ßÙà✶Ï✫➴ ➭✡➛✪➭✓➃✍➨❚✃â↕➒➭✡➉☞➆✍➨ã➭✓➃➐➄➇➆➐➙➲➊✑➄➇➊❦↕➬➭✡➛☞➉ä➵✤↕➒➨✡➙å➄✻➍q➨➲➉☞➆➐✃❚➆➐➄➇➭✡➃Õ↕➇➭✡➉☞➆➐➨ã➭✡➃➐➄➒➆✍➙❘➊❦➄➒➊✵↕➒➜ ➭✡➜➬➄➒➓☞➊Ù➃✍➨➢➍➯➊❦➜➱➄➮➚✓➭✡➃➐➆✍➉Ð➭✡➃➅➄➇➆➅➄➇➈☞➉☞➊❙➜➒➊✵➊❦➛✛➴♣➷❺➵✶➄➒➓☞➊❭➭✡➃➐➄➒➆➐➄➒➈☞➉☞➊❙➑✵➭✡➛☞➛☞➨✓➄➏➩✖➊➌➉☞➊✑➄➇➊❦↕➒➙❘➆✍➛☞➊❦➉ä➵✤➨✡↕➮➙➲➨❚↕➱➊❙➄➇➓☞➭✡➛ ➄✻➍q➨❒➜➱➊✵➑✵➨✡➛☞➉☞➜ ×ÙØ➷ÚÏ✶➍➏➓☞➊❦➛➲➄➇➓P➊❯➭✓➆✍↕➒➑❦↕➇➭✓➵✯➄✺➉☞➊✵➜➱➑✵➊✵➛P➉☞➜➬➩Õ➊✵➃✍➨➢➍Û➭Ù➄➒➓☞↕➒➊❦➜➒➓☞➨✡➃✍➉➲➭✡➃➐➄➒➆➐➄➇➈P➉☞➊ÙÑ ✁➎Ü✦Ý❚Ý✡Ý ➥➓☞➊➶➂➌➋✟Ó ↕➱➊✵➑✵➊❦➆➐➚✡➊✵➜➟➭✡➃➐➄➒➆➐➄➇➈P➉☞➊➣➆➐➛P➵✤➨❚↕➒➙➲➭✓➄➒➆✍➨❚➛á➵✤↕➒➨❚➙ ➭✡➛ Ü ➍➏➆➅➄➇➓Ð➄➇➓☞➊❭➭✡➃➅➄➇➆➅➄➇➈☞➉☞➊❯➄➔➭✡➳✓➊✵➛ Ü ➄➇➓P➊❥➂❾➋➎Ó ➆➐➛☞➉☞➆➐➑◗➭✓➄➒➊✵➜♣➭❾➵Þ➭✡➈☞➃➅➄✳➩✱➽♦➵Þ➭✡➆✍➃➐➆✍➛☞✃❥➄➇➨Ù➜➱➄➒↕➒➨❚➩Õ➊❥➭❾➍➬➭✓➄➒➑➔➓☞➉☞➨❚✃Ù➄➇➆➐➙➲➊❦↕✵➴✶➂➸➵Þ➭✡➈☞➃➐➄ ➆✍➜q➭✡➃➐➜➒➨❳➆➐➛☞➉☞➆➐➑◗➭✓➄➒➊✵➉❫➆➅➵②➆✍➛✱➄➒➊✵↕➒➛☞➭✡➃Õ➵Þ➭✓➆✍➃✍➈P↕➒➊✵➜❋➭✡↕➱➊❙➉☞➊✑➄➇➊❦➑❦➄➇➊❦➉ä➆✍➛➲➄➒➓☞➊❙➂❾➋➎Óæ➴ ➥➓☞➊❾➉☞➊✑➄➇➊✵➑✑➄➇➆➐➨❚➛➹➨✡➵✮➭Ù➵Þ➭✡➈☞➃➐➄ ➄➇➈P↕➒➛☞➜➏➨❚➛➟➭✡➛ä➆✍➛☞➉P➆✍➑◗➭❱➄➇➨❚↕➬➃✍➭✡➙❘➧➹➍➏➆➐➄➇➓P➆✍➛➹➄➇➓P➊❭➑❦➨❩➑➔➳✟➧☞➆➅➄◗➴ ➥➓☞➊❳➂❾➋➎Ó ↕➱➊✵➑✵➊❦➆➐➚✡➊✵➜❾➭ã➜➱➄➇➭✓➄➇➈P➜❯➆➐➛☞➉☞➆✍➑✵➭✓➄➇➆➐➨❚➛➹➵✤↕➒➨✡➙✾➄➇➓☞➊ ×ÙØ➷➯➆✍➛P➉☞➆✍➑✵➭✓➄➇➆➐➛☞✃♦➍➏➓☞➊❦➄➒➓☞➊✵↕❥➄➇➓☞➊ ×ÙØ➷ ➆✍➜q➧✖➨➢➍q➊✵↕➱➊✵➉ä➨❚➛✛➴✳➷❺➵②➄➒➓☞➊ ×ÙØ➷✳➉☞➨➎➊✵➜➬➛☞➨✓➄➬➆✍➛P➉☞➆✍➑✵➭✓➄➇➊❥➄➇➓✪➭✓➄➯➆➐➄q➆✍➜q➧✖➨➢➍q➊✵↕➒➊❦➉ä➨❚➛➹➍➏➆➐➄➒➓☞➆✍➛❘➄✻➍➯➨â➜➱➊✵➑✵➨✡➛☞➉☞➜ ➭✓➵✯➄➒➊✵↕Ù➧✖➨➢➍q➊✵↕❒➆✍➜❭➭✡➧☞➧☞➃➐➆✍➊❦➉ Ü ➭➼➵Þ➭✡➈P➃➐➄Ù➆✍➜Ù➆➐➛☞➉☞➆✍➑✵➭✓➄➇➊❦➉➶➩✟➽➶➵Þ➭✡➆➐➃✍➆➐➛☞✃❫➄➇➨➼➜➱➄➒↕➒➨❚➩Õ➊ã➄➇➓☞➊ã➍➬➭❱➄➇➑➔➓☞➉☞➨✡✃➟➄➇➆➐➙➲➊❦↕✵➴ ➥➓☞➊Ð➂❾➋➎Ó ➉☞➨❩➊❦➜â➛☞➨✡➄♦➭✡➧☞➧☞➃➅➽➦➧Õ➨➢➍➯➊❦↕♦➄➇➨➣➄➒➓☞➊ ×ÙØ➷➌➆➐➵➮➄➇➓P➊ ×ÙØ➷➌➆✍➜â➭✡➃➐↕➒➊✵➭✡➉P➽ç➧✖➨➢➍q➊✵↕➱➊✵➉á➨❚➛✛➴Ö➷❺➵ ➄➇➓P➊ ×ÙØ➷❋➆✍➜➮➧Õ➨➢➍➯➊❦↕➒➊✵➉➟➨✡❰➶➭✓➵✯➄➒➊✵↕➬➄➒➓☞➊❭➭✡➆✍↕➱➑✵↕➇➭❱➵✯➄➮➉☞➊✵➜➱➑✵➊❦➛☞➉☞➜❙➩Õ➊✵➃➐➨➢➍Ô➄➒➓☞➊❭➭✡➃➐➄➒➆➐➄➇➈P➉☞➊❙➄➇➓P↕➒➊✵➜➱➓☞➓☞➨❚➃➐➉ Ü ➄➇➓P➊ ➂➌➋✟Ó ➉☞➨➎➊✵➜♣➛☞➨✡➄❋↕➱➊◗➭✡➧☞➧P➃➐➽â➧Õ➨➢➍➯➊❦↕♣➄➒➨❭➄➒➓☞➊ ×ÙØ➷✶➈☞➛P➃✍➊✵➜➱➜❋➄➒➓☞➊❥➭✡➆✍↕➱➑✵↕➒➭✓➵✯➄♣➭✡✃✱➭✓➆✍➛ã➉☞➊✵➜➱➑✵➊❦➛☞➉☞➜➯➩Õ➊✵➃➐➨➢➍Û➄➇➓P➊ ➄➇➓P↕➒➊✵➜➱➓☞➨❚➃➐➉➣➭✡➃➅➄➇➆➅➄➇➈☞➉☞➊✓➴ ➥➓☞➊❙➂❾➋➎Ó ➭✡➃➐➜➒➨❒➭✡➑✵➑❦➊✵➧P➄➒➜➮➭✡➛❘➆✍➛☞➓P➆✍➩☞➆➅➄♣➜➒➆✍✃✡➛✪➭✡➃☞➄➇➓☞➭✓➄➯➧P↕➒➊❦➚✡➊✵➛✱➄➇➜➯➆➐➄♣➵✤↕➒➨❚➙è➄➒➈☞↕➒➛P➆✍➛☞✃❭➨❚➛❘➧✖➨➢➍q➊✵↕q➄➒➨ ➄➇➓P➊ ×ÙØ➷❋➨✡↕➯➆✍➛P➉☞➆✍➑✵➭✓➄➇➆➐➛☞✃♦➭❳➵Þ➭✡➈P➃➐➄◗➴✶➂❙➃➐➃❐➨✡➄➒➓☞➊✵↕➬➂❾➋➎Ó ➵✤➈☞➛☞➑✑➄➇➆✍➨✡➛☞➜➮➭✡↕➱➊❾➈☞➛✪➭✓❰✖➊✵➑✑➄➇➊❦➉➼➩✱➽➲➄➇➓☞➊❾➆➐➛☞➓☞➆➐➩☞➆➐➄ ➜➒➆➐✃❚➛✪➭✡➃é➴ ➥➓☞➊❭➂➌➋➎Ó ➭✡➃✍➜➱➨➲➭✓➑✵➑✵➊❦➧P➄➇➜❯➭â↕➒➊❦➜➒➊❦➄❥➜➱➆✍✃❚➛✪➭✓➃❐➄➇➓✪➭❱➄❯↕➱➊❦➄➒➈☞↕➒➛☞➜➏➆➅➄➮➄➇➨ã➆➐➄➒➜➮➆✍➛☞➆➅➄➇➆✕➭✓➃✖➜Ú➄➔➭✓➄➒➊✡➴ ê