Figure 4-5: MVX-A16 card lights
Note: For more detailed information about the MVX-A16 front panel controls and lights,
see 5.6 MVX-A16 analog card front-panel lights and controls.
4.5 Wiring audio devices to the matrix frame
An external four-wire audio device can be directly connected to a port connector
through the four audio pins. If there is excessive noise on the lines between the
device and the matrix, the device may be electronically unbalanced with the rest
of the system. The device must be isolated with external isolation transformers.
RESET
+3.3V
ACTIVE VOX
+5V
-12V
+12V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
FRAME
DATA
STATUS
One of the four power-supply lights
Is lit to indicate that the associated
power supply is operating properly.
The ACTIVE lights
correspond to the card’s
16 ports. When lit, an
active light indicates that
RS422 data is being
received.
The VOX lights corresponds to
the card’s 16 ports. When lit, a
VOX light indicates the audio
level on that port’s connected
audio device has exceeded a
threshold. The threshold audio
level is set for that port’s
connected audio device in EHX.
The frame data light flashes
steadily (1: 1 0.5 Hz) when
information has successfully
passed between the CPU
card and the MVX-A16 card.
The status light is lit red when the
MVX-A16 card fails to communicate
with the CPU card.
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