Specifications

4.3.17 (Step 8) An tenna Test
Ac tion No tice A 8150.3 ad vises that:
“A low qual ity AM broad cast re ceiver
should be used to de ter mine if en ergy is
be ing trans mit ted from the an tenna.
When the an tenna of the ra dio (tun ing
dial on any set ting) is held about 6
inches from the ac ti vated ELT an tenna,
the ELT au ral tone will be heard on the
AM broad cast re ceiver. This is not a
mea sured check, but it does pro vide con -
fi dence that the an tenna is ra di at ing suf fi -
cient power to aid search and res cue.
The air craft’s VHF re ceiver, tuned to
121.5 MHz, may also be used. This re -
ceiver, how ever, is more sen si tive and
could pick up a weak sig nal even if the
ra di at ing ELT’s an tenna is dis con nected.
Thus it does not check the in teg rity of
the ELT sys tem or pro vide the same
level of con fi dence as does an AM ra dio.”
4.3.18 (Step 9) Log book En try
En ter the date the test tech ni cian’s in-
itials and whether the ELT passed or
failed into the air craft’s log book.
4.4. Sum mary of Min i mum
Re quire ments
4.4.1 Spec i fi ca tions @ 121.5 MHz
• Fre quency:121.5 MHz
• Fre quency Tol er ance: +/-6.075 KHz
• Mod u la tion: AM
• Power Out put: >/= 23.0 dBm
4.4.2 Spec i fi ca tions @ 243.0 MHz
• Fre quency:243.0 MHz
• Fre quency Tol er ance:+/-12.15 KHz
• Mod u la tion: AM
•
Power Out put: >/= 23.0 dBm
4.4.3 Spec i fi ca tions @ 406.025
MHz
•
Fre quency: 406.025 MHz
•
Fre quency Tol er ance: +/- 2 KHz
• Mod u la tion: Bi-phase L
• Power Out put: 37.0 dBm +/- 2dBm
4.4.4 Trans mit ter Test
Per form the trans mit ter tests by ac ti vat -
ing the ELT and lis ten ing on 121.5 MHz.
An am pli tude mod u la tion (AM) broad cast
ra dio re ceiver should be used to de ter
-
mine if en ergy is be ing trans mit ted from
the an tenna (see sec tion 4.3.17).
NOTE: All ELT “ON” tests should be per -
formed within the first five min utes af ter
the hour UTC.
4.5. ELT Bat tery Pack Re
-
place ment
NOTE: The bat tery pack con tains
static sen si tive parts, take ESD pre cau
-
tions be fore han dling. Re move the four
screws from the bat tery pack. Be fore pro
-
ceed ing fur ther, read the fol low ing ad vi-
sory to avoid dam age to the ELT. Also
re fer to Fig ure 4-4.
WARNING: The bat tery pack is con-
nected to the ELT via short in ter con nect
har nesses which limit the dis tance of
sep a ra tion be tween the two com po nents
prior to dis con nect ing the har nesses. Pro
-
ceed as fol lows:
•
Lay the ELT on its side.
•
Care fully lift the bat tery pack away from
the ELT and lay along side the ELT
unit.
ARTEX AIRCRAFT SUPPLIES DOCUMENT # 570-5000
04/04/02 PAGE 4-15