SDR-OMNI Avionics Test Set User Manual
Revision B 6 June 2023 Page 95
5.12 TESTING SELCAL SYSTEMS
The SDR-OMNI is able to transmit dual tone AM modulated SELCAL (Selective Calling) codes on HF and VHF
frequencies in order to test SELCAL systems on long-haul aircraft so equipped.
Figure 5-38. SELCAL Test screen
1. From the Home menu, select Communication -> SELCAL.
2. Generally, SELCAL is tested over-the-air. Select Port -> Antenna B and use the Telescopic Antenna
connected to the ANT-B connector. Extend to the appropriate length for the desired frequency. See Table
2-3.
3. Refer to Figure 5-38 and the description of the screen fields in Table 5-13.
4. If testing from the cockpit, stick the antenna out from the pilot’s side window.
5. Set the SELCAL code on the SDR-OMNI to the code on the placard on the aircraft panel.
6. Make sure the aircraft cockpit system is enabled to announce the SELCAL chime or SELCAL light.
7. Press either the Ping or Every 30 Seconds button to initiate SELCAL bursts.
8. Confirm that the aircraft SELCAL system properly announces a SELCAL transmission.
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