ARTEX PRODUCTS / ACR ELECTRONICS, INC
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
570-5000 Rev. U
Company Confidential
25-62-11
Page 30 of 66
2)
Monitor 121.5 MHz on an AM receiver.
3)
Listen for the aural sweep tone on the receiver. The audio
should “sound” like an ELT.
SUBTASK 25-62-11-750-006
K.
121.5/243.0 MHz Power Output Measurement
–
Item 5c
1)
Connect the measuring device, referring to SUBTASK 25-62-11-750-003 on page 29.
2)
Activate the ELT, if necessary, by placing the control switch in the “ON” position.
3)
Wait three minutes.
4)
Read the displayed amplitude for 121.5 MHz. The amplitude must be within the minimum specified
for 121.5 MHz in Table 3 on page 23 at the terminal output.
5)
Change to 243.0 MHz and repeat the procedure for 243.0 MHz.
SUBTASK 25-62-11-750-007
L.
406 MHz Frequency Measurement
–
Item 5d
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 25-62-11-750-003 on page 29.
2)
Activ
ate the ELT, if necessary, by placing the control switch in the “ON” position.
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 23.
NOTE:
The exact 406 MHz frequency used is printed on the ELT product label.
SUBTASK 25-62-11-750-008
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 25-62-11-750-003 on page 29.
2)
Activate the ELT, if necessary, by placing the control 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 23, at the output
terminal.
5)
Deactivate the ELT by placing the control switch in the “OFF” position.
