Specifications

trans mit ters. When cou pled with the
air craft’s nav i ga tion sys tem the po si tion
ac cu racy im proves to ap prox i mately
100 me ters. The ELT also trans mits a
dig i tal mes sage which al lows the
search and res cue au thor i ties to con-
tact the owner/op er a tor of the air craft
through a da ta base. In for ma tion con -
tained in the da ta base that may be
use ful in the event of a crash is
shown be low:
• Type of Air craft
•
Ad dress of Owner
•
Tele phone Num ber of Owner
•
Air craft Reg is tra tion Num ber
•
Al ter nate Emer gency Con tact
Once the ELT is ac ti vated and the
406.025 MHz sig nal is de tected from
the sat el lite and a po si tion is cal cu -
lated, the 121.5/243.0 MHz trans mis -
sions are used to home in on the
crash site. Be cause air craft com mu ni -
ca tion ra dios are not ca pa ble of re
-
ceiv ing 406.025 MHz trans mis sions,
the only method of mon i tor ing the ELT
is the blink ing cock pit light, the buzzer
or the 121.5/243.0 MHz trans mis sions
which may be mon i tored on the air
-
craft com mu ni ca tion trans ceiver.
The switch be low the ELT cock pit
light al lows you to turn the unit on for
test ing and to re set the unit. You can
-
not “dis arm” or dis able the unit from
the cock pit. Cock pit op er a tion is lim
-
ited to de ac ti vat ing the ELT af ter i t
has been ac ti vated, or man u ally ac ti -
vat ing the ELT.
The C406-2 se ries ELT’s are housed
in a high im pact fire re sis tant
polycarbonate plas tic case. The ELT
unit is able to with stand ex tremely
harsh en vi ron ments. Units, ex actly like
yours, have been sub jected to nu mer -
ous 500g shock pulses, 1000 pound
crush weights and se vere penetrator
tests, and con tinue to op er ate nor -
mally. Con tinued op er a tion in a tem
-
per a ture range of -20 de grees C
through +55 de grees C is as sured.
1.1.1. LINE RE PLACE MENT
UNITS (LRU)
1.1.2.
The C406-2 se ries sys tem con
-
sists of the fol low ing com po nents:
ELT Unit
•
a. G-Switch
• b. Trans mit ter
•
c. Mi cro pro ces sor
• d. Mis cel la neous com po nents
• e. “ON” Light
•
f. Trans mit ter Mod ule
Bat tery Pack
Fixed An tenna
Con necting Coax Ca ble
Mount ing Tray
Pro tec tive Top Cover
Mount ing Tray End Cap
Cock pit Re mote Switch As sem bly
Buzzer
In stal la tion Kit
1.2. TRANS MITTER CHAR
-
AC TER IS TICS
The printed cir cuit as sem bly (PCA) of
the C406-2 se ries ELT is unique in
that the PCA has no RF func tion but
rather only con trol func tions for the
RF mod ule. The PCA con tains a one
time pro gram ma ble mi cro pro ces sor that
con trols all the ELT func tions
(ON/OFF, mod u la tion, 406 MHz dig i tal
mes sage and RE SET).
ARTEX AIRCRAFT SUPPLIES DOCUMENT #570-5000
06/30/99 PAGE1-3