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Optimizing the Analog Audio
The level for each analog audio input can be adjusted within a range of -18 dB to +24 dB,
so there are no noticeable volume differences between sources and for the best headroom
and signal-to-noise ratio. The volume for each analog audio output can be adjusted from full
loudness to effectively muted. Adjust the levels as follows:
1.
2.
3.
4.
5.
6.
RS-232 Insertion
The XTP twisted pair and fiber input and output boards allow you to insert RS-232 control
signals onto the same XTP cable that carries video and audio to extend them to the Over
XTP port on a connected endpoint (see
page 70). The control signals can be inserted two ways:
Ethernet to RS-232 insertion (see
•
Captive screw insertion (see
•
•
The insert inputs and outputs, whether inserted via Ethernet or captive screw connectors,
can support up to a 115k baud rate.
Enabling Ethernet and Captive Screw Insertion
For an XTP port to distribute the inserted signal, it must be enabled for either Ethernet
insertion or captive screw insertion (default). The simplest way to make this selection is
using the XTP Configuration Software.
Alternatively, you can make this selection via SIS commands.
•
•
Connect analog audio sources to all desired inputs and connect the analog audio
outputs to output devices such as audio players (see
page 14). For best results, wire all of the inputs and the outputs balanced.
Power on the audio sources, the matrix switcher, and the audio players.
Switch among the inputs (see
the audio with a critical ear or measuring the output audio level with test equipment,
such as a VU meter.
As necessary, adjust the input audio level of each input (see
the Input Audio Level
on page 48) so that the approximate output level is the same
for all selected inputs.
Tie an audio input to each analog audio output.
As necessary, adjust the output audio level of each output (see
the Analog Output Volume
A control signal applied to the matrix switcher LAN port can be routed to any matrix
switcher XTP port.
Captive Screw Signal Insertion
A control signal applied to an RS-232 captive screw port on an XTP board is tied
directly to the same-numbered XTP port on that board.
RS-232 port 1 is tied to XTP port 1 only, 2 is tied to 2, and so on.
•
You must physically connect a cable connected to the captive screw connector where a
control signal is to be inserted.
For the input XTP and fiber boards, see the
serial port insertion enables
For the output XTP and fiber boards, see the
Ethernet serial port insertion enables
Input and Output Boards
Creating a Configuration
on page 54).
figure 50
on the next page and
Ethernet to RS-232 Insertion
input board Captive screw and Ethernet
SIS commands on page 92.
output board Captive screw and
SIS commands on page 105.
XTP CrossPoint Series • Operation
on
on page 37), listening to
Viewing and Adjusting
Viewing and Adjusting
figure 51
on
on the next page) —
on page 69) —
66
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