q P-BIT, I-BIT, C-BIT functio na li ty with op ti cal in di ca ti on of test sta tus/re sult
q Fall-back to Back-Up ope ra ti on upon fai lu re of po wer supp ly (ba ckup po wer supp ly
from air craft ne ces sa ry!); ma nu al ly Back-Up ope ra ti on in case or of de fec ti ve Au dio
Con trol Unit or part the re of
q Con fi gu ra ti on ca pa bi li ty for sys tem in te gra ti on or main ten an ce shops to con fi gu re
and adapt the sys tem to the in di vi du al air craft re qui re ments
The functio nal ins crip tions of key caps, ro ta ry switch, and in cre ment sen sor are fi nis hed in whi te trans lu cent cha rac ters. Il lu mi na ti on is com pa ti ble with com mon ly used night vi si on gog gles (NVG).
Every Au dio Con trol Unit has a mi cro con trol ler to pro cess switch and but ton ac ti vat ions as well as in di ca ti on sig nals. Con trol data is trans fer red via a dual re dun dant can bus in ter fa ce. SLA VE po si ti on (tog gle switch) and Back-up tog gle switch are not be rou ted through the in ter fa ce but must be hard-wi red
in or der to al low Back-up ope ra ti on, even if the unit had fai led.
Au dio Con trol Units are fac to ry con fi gu ra ble to dif fe rent ope ra ti on pro fi les, e.g. dis ab ling cer tain trans cei ver or re cei ver ac ces si bi li ty in the ca bin / pas sen ger area. Au dio Con trol Units may also be equip ped
with front pa nels im prin ted to cus to mer re quests.
All con trols and LED- in di ca tors of the Au dio Con trol Unit are lo ca ted on the ro ta ry board, pro ces sor
board and vo lu me boards :
Ro ta ry board:
The fol lo wing are moun ted on the ro ta ry board
q 1 ro ta ry switch, 10 po si tions, to pre se lect the ac ti ve trans cei ver as well as Pub lic Ad -
dress or In ter com mode. Also to se lect dual trans mis si on mode if pro vi ded (op ti on).
q 1 lockable switch.
q 1 PTT but ton ( tog gle switch).
Processor board:
The fol lo wing are moun ted on the processor board
q Dual po ten tio me ter to set the in di vi du al main vo lu me con trol (ou ter ro ta ry knob) and
to set the in di vi du al IC vo lu me con trol (in ner ro ta ry knob).
q VOX po ten tio me ter to set the in di vi du al VOX vo lu me le vel.
Vo lu me board (top)
The fol lo wing are moun ted on the vo lu me board (top).
8 moni to ring but tons to switch on /off trans cei ver monit oring and in du vi du al vo lu me con trol.
ACU6100
DV 64440.03/.04 Issue 1 Sept./2005 Page 1-3