Does the IMA support RX audio for digital modes?
No, not “on board”. However, if you add RX audio support on the K2’s Front Panel circuit board, then the IMA can route the signal to the mic connector. Referring to the IMA schematic diagram at right, the best way to do this would be to put RX audio on the “DOWN” pin on the K2 Front Panel circuit board, which in turn is hardwired to MIC3 on the Mic Extender board. This way it will always be on MIC3 no matter how you configure the jumpers. Doing this would require that you also cut the existing “DOWN” signal trace on the K2 Front Panel circuit board to disconnect it from FP-P1. Please contact us if you require further assistance.