ARTEX PRODUCTS / ACR ELECTRONICS, INC
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
B406-4 (453-5004)
Page 32 of 70
25-62-03
3)
Wait three minutes.
4)
Measure the frequency. Measure the frequency after the three-minute waiting period. The frequency
must be within the tolerance specified in Table 3 on page 24.
NOTE:
The exact 406 MHz frequency used is printed on the ELT product label.
SUBTASK 25-62-03-750-008
M.
406 MHz Power Output Measurement
–
Item 5e
CAUTION: POWER OUTPUT IS APPROXIMATELY 37 DB (5 WATTS). BE SURE ADEQUATE
ATTENUATION IS INSERTED IN-LINE BETWEEN THE ELT ANTENNA OUTPUT AND THE
MEASURING DEVICE TO PROTECT THE INPUT CIRCUITS OF THE MEASURING DEVICE.
1)
Connect the measuring device, referring to SUBTASK 25-62-03-750-003 on page 29.
2)
Activate the ELT, if necessary, by placing the c
ontrol switch in the “ON” position.
3)
Wait three minutes.
4)
Read the displayed amplitude of the 406 MHz burst that follows the three-minute wait period. The
amplitude must be within the minimum specified for 406 MHz in Table 3 on page 24, at the output
terminal.
5)
Deactivate the ELT by p
lacing the control switch in the “OFF” position.
SUBTASK 25-62-03-750-009
N.
Current Draw Test
–
Item 5f
CAUTION: EXERCISE EXTREME CAUTION TO AVOID CAUSING A SHORT CIRCUIT CONDITION,
WHICH WILL BLOW THE FUSES IN THE BATTERY PACK. THIS TEST SHOULD ONLY BE
PERFORMED BY AN EXPERIENCED TECHNICIAN/MECHANIC.
CAUTION:
ALL “ON” STATE CUR
RENT MEASUREMENTS MUST BE MADE WITH THE RF OUTPUT (I.E.,
ELT ANTENNA CONNECTOR) LOADED WITH 50 OHMS RATED FOR 5 WATTS. EITHER A
RESISTIVE LOAD OR EQUIPMENT WITH 50 OHM IMPEDANCE PADDED WITH 10 DB/5
WATT ATTENUATOR. REFER TO SUBTASK 25-62-03-750-003 ON PAGE 29.
1)
Verify the ELT control switch is in the “OFF” position.
2)
Separate the battery pack from the ELT.
3)
Disconnect the 2-wire ELT power connector.
4)
Install test harness 611-0024, or equivalent, in the power circuit. See Figure 9 Current Draw Test Setup
on page 33.