Garmin G1000H Bell 407GX Pilot's Guide - Page 142

AUDIO PANEL AND CNS SPLIT COM NOTE: Split COM performance is affected by the distance between the COM antennas and the separation of the tuned frequencies. If the selected COM frequencies are too close together, interference may be heard during transmission on the other radio. During Split COM operation, both the pilot and the copilot can transmit simultaneously over separate radios. The pilot can still monitor NAV1, NAV2, AUX, and MKR Audio as selected, but the copilot is only able to monitor the higher numbered COM (COM2 or COM3). Selection of more than one MIC Key selects Split COM operation (using COM1/COM2, COM1/COM3, or COM2/COM3). The COM1/MIC1, COM2/MIC2, or COM3/MIC3 annunciators are illuminated indicating Split COM operation. The selected COM frequencies are displayed in green indicating that both transceivers are active. Split COM operation is cancelled by pressing one of the selected MIC Keys again. When in Split-COM mode, the pilot is using the lower numbered COM, the copilot is using the higher numbered COM. The MIC1 or MIC2 (depends on COMs selected for Split-COM) Annunciator flashes when the pilot's microphone PTT is pressed. The MIC2 or MIC3 (depends on COMs selected for Split-COM) Annunciator flashes when the copilot's microphone PTT is pressed. COM1 Radio is Used by the Pilot COM2 Radio is Used by the Copilot Figure 4-45 Split COM Operation 130 Garmin G1000H™ Pilot's Guide for the Bell 407GX 190-01255-00 Rev. A