ACR&Artex C406-2 HM - Manual (Page 42)

ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
25-62-11
Page 42 of 87
JUN 20/13
SUBTASK 25-62-11-750-004
I. Audio Modulation Check – Item 5b
(1) Perform this check in conjunction with SUBTASK 25-62-11-750-003.
(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 25-62-11-750-005
J. 121.5/243.0 MHz Power Output Measurement – Item 5c
(1) Connect the measuring device, referring to SUBTASK 25-62-11-750-002 on page 40.
(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 34 at the terminal output.
(5) Change to 243.0 MHz and repeat the procedure for 243.0 MHz.
SUBTASK 25-62-11-750-006
K. 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 25-62-11-750-002 on page 40.
(2) Activate 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 34.
NOTE: The exact 406 MHz frequency used is printed on the ELT product label.
SUBTASK 25-62-11-750-007
L. 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