SDR-OMNI Avionics Test Set User Manual
Revision B 6 June 2023 Page 87
Figure 5-35. ELT Setup
2. From the ELT Setup screen:
a. If directly connecting to the ELT transmitter (Figure 5-35, 2), select Port Direct T/R. Connect a
coaxial cable between the SDR-OMNI T/R port and the UUT. Enter the corresponding Cable
Loss.
b. If testing over-the-air (1), select Antenna B and connect the Telescopic Antenna to the ANT-B
connector. Collapse it to its shortest length. Enter the approximate Antenna Distance to UUT.
c. The headset that is supplied with the SDR-OMNI can be used to listen to the audio sirens on the
VHF and UHF emergency frequencies. A slider bar for Headset Volume is provided.
3. Select the Close button on the ELT Setup screen. The SDR-OMNI will begin listening for a 406 MHz data
burst.
4. Verify that the current time is within a valid ELT test window (hour+00 to hour+05). Activate the ELT test
button or switch on the ELT UUT or in the cockpit.
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