Ameri-King AK-451-ELT - Manual (Page 98)

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3.5.3 Frequency Test / Current Draw Test, Performance Testing:
NOTE: Using of ELT Test set TS-451 or equivalent test equipment is acceptable
The ELT Transmitter frequency may be measured as follows:
3.5.3.1 Connect the Frequency Counter as shown below:
3.5.3.2 Measure the 121.5 / 243.0 MHz frequency:
Select the Notch filter as appropriate, i.e. 243 notch when measuring 121.5 MHz.
The ELT should be within 50ppm (± 6.075 KHz) of 121,500,000 Hz.
Repeat with the 121.5 MHz Notch Filter. The ELT frequency should be within 50
ppm (± 12.150 KHz) of 243,000,000 Hz, after 3 minutes of operation.
3.5.3.3
Measure the 406.028 MHz frequency:
Ensure that adequate attenuation rated for 406.028 MHz, 37 dBm and 5 Watts is
installed between the ELT's 406.028 MHz output and the input to the frequency
counter to prevent damaging the frequency counter's input circuitry.
Set up the equipment as shown below:
Verify an initial frequency of 406.028 MHz +/- 1 KHz, after 3 minutes of operation.
Note:
Allow the unit to run 3 minutes, before making the measurement to allow the
oscillator to stabilize.
ELT BNC
Connector
Applicable
attenuator
Spectrum
Analyzer