Dynon SV-INTERCOM-2S Installation And User Manual page 18

3.2.2 Dual Radio PTT Installation
The SV-INTERCOM-2S has two separate radio outputs that can be connected to individual COM
radios. In a dual COM radio installation, the PPT output signal (Radio PTT (Pin 12)) requires an
external switch to control which radio receives the PTT output signal, and thus transmits.
Installers will need to source an external single pole, double throw (SPTD) switch for this
installation.
For optimal dual COM radio performance, Dynon suggests using a full-
featured audio panel for COM radio source control.
Dual radio operation requires COM radios with transmit (TX) interlock
functionality. The SV-COM-425 does not have TX interlock functionality; and
therefore, is not suitable for dual COM radio installations.
For best dual COM radio performance without a full-featured audio panel,
Dynon suggests pairing an SV-COM-T25 or SV-COM-T8 with a third-party
radio that has TX interlock functionality. (See
guidance.)
SV-INTERCOM-2S - Installation and User Guide, Revision B
Figure 9: Headset Jack Schematic Symbol Guide
Figure 10 for installation
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