Specifications

ARTEX AIRCRAFT SUPPLIES DOCUMENT #570-5000
04/11/01 PAGE 1-2
1.1. SYS TEM DE SCRIP TION
The ARTEX C406-2 se ries ELT’s
(C406-2 and C406-2HM) are a “third
gen er a tion ELT,” trans mit ting on 121.5,
243.0 and 406.025 MHz. The ELT’s
are de signed to meet or ex ceed the
re quire ments of TSO C91a, TSO C126
and the man da tory au to matic ELT re-
quire ments of FAR Part 91. The ELT
meets the re quire ments of Ca na dian
Avi a tion Reg u la tions (CAR) Part V,
Subpart 51, Air wor thi ness Man ual Sec -
tion 551.104. In ad di tion, these ELT’s
are de signed to meet the re quire ments
of Eurocae ED-62.
The C406-2 se ries ELT’s em ploy a
com pletely new trans mit ter which fea -
tures higher out put power and a more
in te grated de sign. The 121.5/243.0
MHz sec tion of the trans mit ter is con -
tained in a mod ule with the 406.025
MHz trans mit ter. The top cir cuit board
con tains the mi cro pro ces sor that con
-
trols the mod ule and all ELT func -
tions. The C406-2 is a dual out put
ELT, as all pre vi ous mod els of Artex
406 MHz ELT’s have been.
The ELT au to mat i cally ac ti vates dur -
ing a crash and trans mits the stan
-
dard swept tone on 121.5 and 243.0
MHz. Ev ery 50 sec onds for 520 mil li
-
sec onds (long mes sage pro to col) the
406.025 MHz trans mit ter turns on.
Dur ing that time an en coded dig i tal
mes sage is sent to the sat el lite. The
in for ma tion con tained in that mes sage
is shown be low:
• Se rial Num ber Of The Trans mit ter or
Air craft ID.
•
Coun try Code
• I.D. Code
• Po si tion Co or di nates (when cou pled to
an ARTEX ELT/NAV ELT/NAV In ter -
face unit [453-6500])
Re fer to Ap pen dix D ( ELT/NAV In ter -
face Ca pa bil ity) for a de tailed dis cus -
sion of the in ter ac tion be tween the
ELT, the ELT/NAV ELT/NAV In ter face
unit and the air craft nav i ga tion sys tem.
The 406.025 MHz trans mit ter will op
-
er ate for 24 hours and then shuts
down au to mat i cally. The 121.5/243.0
MHz trans mit ter will con tinue to op er
-
ate un til the unit has ex hausted the
bat tery power which typ i cally will be
at least 72 hours.
The ELT/NAV In ter face unit al lows
the ELT to com mu ni cate with the air-
craft’s nav i ga tion sys tem and re ceive
po si tion data (lon gi tude and lat i tude)
which the ELT will trans mit in the
event of a crash. Pro gramming the
ELT with the 24 bit long mes sage
protocol al lows the ELT to be au to
-
mat i cally pro grammed by the ELT/NAV
In ter face with the air craft’s 24 bit ad -
dress. The ELT/NAV In ter face unit
must be strapped (bi nary “1" bits tied
to ground) with the same 24 bit ad
-
dress as the ICAO or Mode S
tran sponder sys tem 24 bit ad dress.
This gives the ELT the abil ity to be
moved from one air craft to an other
with out the need for man ual re pro
-
gram ming of the ELT. This is ad van ta -
geous for fleet op er a tors since the
ELT/NAV In ter face unit will au to mat i-
cally re pro gram the ELT with the
new air craft’s 24 bit ad dress iden t i fi c a
-
tion.
One ad van tage of the 406.025 MHz
trans mit ter is that it will pro duce a
much more ac cu rate po si tion, typ i cally
1 to 2 ki lo me ters as com pared to 15
to 20 ki lo me ters for 121.5/243.0 MHz