Beyerdynamic NE 900 D Cobra User manual

APPLICATIONS
The NE 900 D Cobra 2-channel receiver of the Opus 900
wireless system provides an integrated CobraNet interface, which
allows connecting the receiver to all CobraNet capable devices of
more than 40 manufacturers. The transmission is via CAT.5 cables
via standard Ethernet for a flexible positioning of the receiver in the
room. Furthermore, analogue inputs are saved and therefore, costs
for the subsequent audio matrix systems.
The CobraNet technology allows transmitting up to 32
channels into each direction with a single 100-Mbit network cable.
As signals can be sent from any node, maximum flexibility is
achieved. Settings can quickly be changed via software without
changing the cabling. The digital transmission via CobraNet is less
interference-prone as the analogue transmission, ensuring a high
sound quality even with long distances.
The NE 900 D Cobra operates in the frequency bands 668 to
692 MHz and 774 to 798 MHz. The TV channels provide 100 pre-
programmed frequencies. A maximum of 16 frequencies can be
operated simultaneously without any interference.
By using the SCAN function an automatic channel search is started
and with the ACT function (Automatic Channel Targeting) the
discovered frequency is transmitted to the transmitter via infra red.
The frequency can also be selected manually.
The menu control is used to access and set the individual
parameters. The colour display shows all parameters such as RF and
AF level, diversity channel, battery status of the transmitter as well
as all menu settings such as frequency, group, channel, squelch,
output level, user name and address.
A sophisticated adjustable squelch system prevents unwanted noise
effectively. The pilot tone-controlled AF mute suppresses inter-
ferences and mutes the receiver when the appropriate transmitter
is switched off.
FEATURES
• Integrated digital 2-channel audio interface
• CobraNet network protocol
• Compatible with other CobraNet devices
• Professional audio quality via standard Ethernet
• Connection via standard CAT.5 cables
• Transmission of a word length of 20 or 24 bits
• Supports a latency period of 1 1/3 ms, 2 2/3 ms and 5 1/3 ms
Front view
• Colour display
• CobraNet LEDs
• Menu control for selecting and setting
• On/off switch with power on LED
• SCAN function for automatic channel search
• ACT function (Automatic Channel Targeting) to transmit the
frequency to a transmitter automatically
• Monitoring/headphone output with volume control and
channel changeover switch
• Mounting bracket for installing the antennae on the front
Rear view
• Removable TNC antennae
• Antenna inputs (TNC socket) with power supply for
antenna amplifiers
• AF output, 3-pin XLR, balanced
• Interface to connect PCs or laptops operating with
Windows® 2000 or XP
• CobraNet interface
beyerdynamic GmbH & Co. KG
Theresienstr. 8 | 74072 Heilbronn – Germany
Tel. [phone] / 617 - 0 | Fax [phone] / 617 - 204
[email protected] | www.beyerdynamic.com
For further distributors worldwide, please go to www.beyerdynamic.com
Non-contractual illustrations. Contents subject to change without notice. E5/NE 900 D Cobra (06.11)
1 of 2
VERSIONS
NE 900 D Cobra CobraNet interface
with true diversity receiver,
668 - 692 MHz . . . . . . . . . . Order # 488.232
NE 900 D Cobra same as above, but frequency band
774 - 798 MHz . . . . . . . . . . Order # 488.240
Front view
Rear view
NE 900 D Cobra
UHF Diversity Receiver with
CobraNet Connector

NE 900 D Cobra
beyerdynamic GmbH & Co. KG
Theresienstr. 8 | 74072 Heilbronn – Germany
Tel. [phone] / 617 - 0 | Fax [phone] / 617 - 204
[email protected] | www.beyerdynamic.com
For further distributors worldwide, please go to www.beyerdynamic.com
Non-contractual illustrations. Contents subject to change without notice. E5/NE 900 D Cobra (06.11)
2 of 2
OPTIONAL ACCESSORIES
Antenna Splitter
ZAS 800 UHF antenna splitter, active,
19" housing, incl. cable set,
740 - 764 MHz. . . . . . . . . . . . . Order # 467.073
ZAS 800 same as above,
but 774 - 798 MHz. . . . . . . . . . Order # 473.081
ZAS 900 UHF antenna splitter, 4-way,
19" housing, 1 HU, incl. cable set,
480 - 800 MHz. . . . . . . . . . . . . Order # 497.541
Antennae
AT 70 A/B Set UHF antenna set for NE 900,
incl. 2 x AT 70 B TNC antenna
amplifiers,
2 x AT 70 TNC antennae and
2 x MS 10 mounting kit . . . . . . Order # 459.976
FBC 71 Cable rear-to front for NE 900 . . Order # 469.823
Antenna Cables
AVK 800/1 TNC(M) AC7, length 1 m,
low-attenuation Aircell 7 . . . . . Order # 473.588
AVK 800/3 TNC(M) AC7, length 3 m,
low-attenuation Aircell 7 . . . . . Order # 473.596
AVK 800/10 TNC(M) AC7, length 10 m,
low-attenuation Aircell 7 . . . . . Order # 473.618
AVK 800/25 TNC(M) AC7, length 25 m,
low-attenuation Aircell 7 . . . . . Order # 473.626
Individual Components - Software
USB Adapter Opus 900 USB Adapter. . . . . . . Order # 490.776
RJ 11 Kabel Opus 900 RJ 11 . . . . . . . . . . . . Order # 490.784
CD ROM Opus 900 CD-ROM. . . . . . . . . . Order # 490.792
Transmitters
There are handheld and beltpack transmitters in a metal or plastic
housing available. The transmitters in a plastic housing are
provided with charging contacts and can be operated with
rechargeable batteries and recharged by using the SLG 900
charger.
TECHNICAL SPECIFICATIONS
Operating principle . . . . . . . . . . . . . . . . . True diversity
receiver (UHF)
Frequency response . . . . . . . . . . . . . . . . 668 - 692 MHz
774 - 798 MHz
Power consumption . . . . . . . . . . . . . . . . 20 W
Power consumption
in stand-by mode . . . . . . . . . . . . . . . . . . 0.2 W
Switching bandwidth . . . . . . . . . . . . . . . 24 MHz
Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . 2 µV
Antenna connection . . . . . . . . . . . . . . . . 2 x TNC
Nominal deviation. . . . . . . . . . . . . . . . . . ± 40 kHz
Output level . . . . . . . . . . . . . . . . . . . . . . 1.2 V
Compander system. . . . . . . . . . . . . . . . . . NE572
Signal-to-noise ratio . . . . . . . . . . . . . . . . > 110 dB(A)
T.H.D. . . . . . . . . . . . . . . . . . . . . . . . . . . . < 0.5% at 1 kHz
Squelch . . . . . . . . . . . . . . . . . . . . . . . . . 2 µV - 1 mV
adjustable
Supply voltage . . . . . . . . . . . . . . . . . . . . 12 V - 15 V DC
Mains . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 V - 240 V AC
Dimensions (L x W x H) . . . . . . . . . . . . . . 482 x 270 x 43 mm
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . 2.75 kg
Minimum distance of the profiles
when mounting into a 19" rack . . . . . . . 446 mm
ARCHITECT’SSPECIFICATIONS
The CobraNet interface shall provide a two-channel UHF receiver.
The output of digital audio signal shall be via Cat.5 network cable
at RJ45. The transmission shall be possible via standard Ethernet.
The receiver shall support CobraNet latency periods of 1 1/3, 2 2/3
and 5 1/3 ms, and shall provide 48 kHz, an A/D converter, additional
analogue outputs, a coloured LC-Display and 19" design. The
receiver shall be multichannel-capable. It shall provide 100 pre-
programmed frequencies. The frequencies shall be adjustable in
25 kHz steps (within a bandwidth of 24 MHz). The integrated
“Scan” function shall select a suitable frequency of the chosen user
group. The ACT function shall be used for wireless transmission of
the frequency to a handheld or beltpack transmitter via infrared.
A control software shall be available as an option. The transmitter
shall operate in a frequency range between 668 and 798 MHz with
a bandwidth of 24 MHz (more frequency ranges available). The
display shall indicate frequency, group and channel, squelch,
5-stage battery status, user name, RF and AF level. The receiver shall
provide a pilot tone AF mute to suppress unwanted noise and a
switchable headphone output to monitor microphone signals. The
signal-to-noise ratio shall be > 110 dB. The T.H.D. shall be < 0.5%.
The dimensions shall be 482x270x43 mm. The weight shall be
approx. 2.3 kg
Manufacturer: beyerdynamic GmbH & Co. KG
Type: Opus NE 900 D Cobra