Telex C-2002 technical manual Line Setup and Description, Crossmute

6 Vega’s C-2002

4 Line Setup and Description

4.1 INTRODUCTION/DEFAULTS

1 2 3 4 5 6 7 8	1)	Cross Mute I/O
	2)	Supervisor I/O
	3)	RX +
	4)	TX +/ (RX + 2W)
	5)	TX -/ (RX - 2W)
	6)	RX -
	7)	Local
	8)	GND/Local

Connector View

Figure 4 Line Connector Pin Out

The Line interface for the C-2002 console provides communication with any standard tone remote system. Figure 4 shows the pin out of the line interface connector, which is on the rear panel (See Figure 2 and Figure 3).

4.2 FEATURE DESCRIPTION

4.2.1Crossmute

When a parallel console operator keys a microphone in the same room, the crossmute function mutes the receive audio path of the other parallel consoles. This prevents any unwanted audio loops that could occur, causing a loud squeal on the paralleled speakers.

Console 1:	Console 2:	Console 3:	Offsite
			Console 4:
Line 1	Line 1	Line 1	Line 1
1 2 3 4 5 6 7 8	1 2 3 4 5 6 7 8	1 2 3 4 5 6 7 8	1 2 3 4 5 6 7 8
			Line -
			Line +

Figure 5 Crossmute Function example.

Feedback may be avoided by muting the receive audio of the other consoles which are in parallel with a transmitting console. This may be accomplished by connecting pins 1 and 8 of each of the consoles to be crossmuted as shown in Figure 5. Pin 8 must be connected to provide a common ground. Figure 5 illustrates the connections between consoles 1 through 3 that are in the same room and when one transmits, the receive audio on the other consoles will be muted. Console 4 is off-site with no possibility of feedback, therefore, it is not connected and will not be muted. Note: The intercom function will not work between crossmuted consoles.