RXC-3080
Hardware Installation and User Guide
9000-0000-042 Revision 06
26 of 45
Genave Electronics
The Audio pins are connected to the 600 Ohm audio transformer. The transformer passes AC voltages
but blocks DC voltages from exiting the RXC-3080. The reason for this is to remove “Hum” from the
audio lines if the RXC-3080 is not connected to the same power supply as the amplifier.
Pinout And Characteristics Of 600 Ohm Audio Port (J12)
The 600 Ohm audio port is used to connect the audio from the RXC-3080 to a PA system such as the
type used in a school, fire station or office building. Most of these systems have audio inputs that are
rated as 600 Ohms of balanced audio (600 ohms between the audio wires and no ground reference).
The transformer passes AC voltages but blocks DC voltages from exiting the RXC-3080. The reason
for this is to remove “Hum” from the audio lines if the RXC-3080 is not connected to the same power
supply as the amplifier. Additionally, the current sent through the transformer is a push-pull type which
allows it to go further without interference from other sources of AC power. Please note that you should
use either twisted wires or shielded wires between the RXC-3080 and the PA amplifier. This helps
remove unwanted AC signals which cause hum and distortion. Also, do not run the audio wires near
fluorescent light fixtures since they produce a large amount of AC noise.
The connector J12 can accept wires up to
16 AWG
.
Note: If you connect the 600 Ohm port to a PA system, you cannot use the External Amplifier Control
Port since the 600 Ohm transformer is also connected to 2 of the pins in this connector.
