121.5/243.0 Mhz Power Output Measurement - Item 5C; 406 Mhz Frequency Measurement - Item 5D; 406 Mhz Power Output Measurement - Item 5E - ACR Electronics Cobham C406-1 Series Abbreviated Component Maintenance Manual

SUBTASK 25-62-10-750-005
J. 121.5/243.0 MHz Power Output Measurement – Item 5c
(1) Connect the measuring device, referring to SUBTASK 25-62-10-750-002, on page 41.
(2) Activate the ELT, if necessary, by placing the control switch in the "ON" position.
(3) Wait three minutes.
(4) Read the displayed amplitude. 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 25-62-10-750-006
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 25-62-10-750-002, on page 41.
(2) Activate the ELT, if necessary, by placing the control switch in the "ON" position.
(3) Wait three minutes.
(4) Measure the frequency. The frequency must be within the tolerance specified in Table 3,
on page 34.
NOTE:
SUBTASK 25-62-10-750-007
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
MEASURING DEVICE TO PROTECT THE INPUT CIRCUITS OF THE MEASURING DEVICE.
(1) Connect the measuring device, referring to SUBTASK 25-62-10-750-002, on page 41.
(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 minium specified for 406 MHz in Table 3, on page 34, at the
output terminal.
(5) Deactivate the ELT by placing the control switch in the "OFF" position.
COBHAM AVIONICS WULFSBERG ELECTRONICS
ABBREVIATED COMPONENT MAINTENANCE MANUAL
C406-1 (453-5002), C406-1HM (453-5003)
The exact 406 MHz frequency used is printed on the ELT product label.
25-62-10
Page 43 of 90
APR 06/10