Inovonics Dante 551, Installation & User Manual

Page: 16 / 64

— 12 —
Analog
Line Output
Characteristics
Left- and right-channel
ANALOG OUTPUT(S)
on the rear panel
are electronically-balanced. This means that they are ground-
referenced and not transformer-isolated. These outputs have a
resistive source impedance of 200 ohms. Levels are expressed
in dBu (unloaded) notation next to the adjusting sliders.
Although seldom seen in modern times, a legacy 600-ohm-
terminating load will drop the actual dBm level 2.5dB below the
figure shown beside the associated adjusting slider.
An unbalanced output should be taken from the ‘hot’ or ‘+’ side
of any analog output and ground, leaving the ‘return’ or ‘–’ side
of the output floating. The unbalanced output level will be 6dB
below the figure shown beside the slider.
Analog levels may be set to any figure between –15dBu and
+15dBu, corresponding to 100% FM carrier or HD program
modulation. The default setting is +4dBu.
AES Digital
Line Outputs
The
AES DIGITAL OUTPUT
delivers balanced, transformer-
coupled AES3 digital stereo program from a source impedance
of 110 ohms. These are 24-bit outputs at a 44.1kHz sample
rate.
AES digital levels may be set between –30dBFS and 0dBFS, cor-
responding to 100% FM carrier or HD program modulation. The
default setting is –10dBFS.
AoIP Streaming
Port and Levels
The Dante-compliant AoIP (Audio over Internet Protocol) out-
puts appear at the rear-panel RJ45
AoIP PORT
, with simultane-
ous transport of FM, HD1, HD
A
, HD
B
and HD
C
program chan-
nels. This port is independent of the 551
LAN PORT
network
connection and its ‘casual streaming’ utility.
Dante/AoIP streaming first requires basic Dante setup under
the Webpage or LCD
Dante
menus as detailed on Page 50. Out-
put levels are adjusted on the Setup / Audio Outputs / Dedicated
Outputs / Dante/AoIP
Webpage, or under the LCD
Setup / Dante
Outputs
menu. The dB notation beside each slider control cor-
responds to the level of program peaks at 100% FM or HD Radio
modulation. These are adjustable between 0dBFS and –30dBFS ;
the default setting is
–10dBFS
.
LAN Network
Port
The RJ45
LAN PORT
connects the 551 to a Local Area Network
(LAN) or the Internet. Network setup is under the Webpage or
LCD
Network
menu and detailed later in the appropriate section.
Networking enables remote control, full SNMP functionality,
and the HTTP/UDP Web-browser ‘casual listening’ utility.
GPOs
A removable screw-terminal strip on the rear panel accesses ten
GENERAL PURPOSE OUTPUTS
(GPO) terminals, the 551 alarm
output ‘tallies.’ GPOs are NPN transistors that saturate to
ground and can sink up to 100mA. Alarm polarity (active
ground or active open) is software-programmable. GPOs may
be assigned to the various reception and program-fault alarms
as detailed on Page 47.