Rane | NM 84 | Data Sheet | Rane NM 84 Network Preamp Data Sheet

Rane NM 84 Network Preamp Data Sheet
DATA SHEET
Description
The NM 84 Network Mic Preamplifier allows sending
eight Channels and receiving four Channels of high quality
audio over a single, low cost computer network cable. The
NM 84 provides a cost effective solution for audio routing
problems in venues such as arenas, convention centers,
churches, schools and theme parks. Unlike point-to-point
distribution systems, the NM 84 features a highly flexible
network protocol, allowing full control of audio destination
and source. It is possible to build flexible audio networks on a
large or small scale by using multiple NM 84s or by combining NM 84s with Rane NM 48 Network Preamplifiers.
The NM 84 provides eight studio grade microphone
preamplifiers. Each Input features selectable 48 volt phantom
power, MIC and LINE modes, coarse gain select, high- and
low-cut filters, gain trim, limiter and 10-segment meter. Each
Input routes to a balanced, direct Output.
The NM 84 Network Preamplifier features Peak Audio
100Base-T CobraNet™ technology. It allows deterministic
(fixed propagation delay), 100Base-T transport of up to 64
channels of audio on a single computer network cable. (A
switched network can transport up to 128 audio channels over
a single network cable.) Each Bundle can contain up to eight
20-bit CobraNet Audio Channels. In addition, the NM 84 may
receive four Channels of 24-bit audio from the 100Base-T
network. Network control is possible using the rear panel
Memory Recall Port (MRP), SNMP or the ActiveX controls
NM 84
NETWORK MIC PREAMP
provided by Rane. All NM 84 parameters may be controlled
from the front panel interface.
24-bit A/D converters provide the digital audio signal for
100Base-T transport. Audio may be transmitted in 20- or 24bit mode. In 20-bit mode, all eight Inputs are transmitted on a
single CobraNet Bundle. In 24-bit mode, two CobraNet
Bundles are required. The user may determine how many
Cobranet Audio Channels (maximum of 7) are transmitted on
each of the two specified Bundles (the NM 84 can identify the
addresses of 999 Bundles).
The NM 84 also provides four high-quality Monitor
Output Channels. Each may be assigned to monitor any one of
the eight possible Cobranet Audio Channels of any 100Base-T
Bundle or any one of the eight possible Local Channels.
Monitor Outs feature 24-bit D/A converters and balanced linelevel cross-coupled outputs capable of +20 dBu signals.
The NM 84 can transmit and receive one channel of RS232 data over the 100Base-T network. The user may set the
baud rate as well as 232 Tx and 232 Rx Channels.
The Memory Recall Port allows up to 16 pre-set Memories
to be recalled with simple switch closures to ground. In
addition to Local MRP, the NM 84 may be set to respond to
Network MRP messages. It may also transmit Local MRP for
monitoring by other NM 84s in the Network.
The NM 84 is fully compatible with other existing
CobraNet products.
Features
 Eight Studio Grade Mic/Line Preamplifiers
 48 volt Phantom Power
 Four 15 dB Coarse Gain Steps
 +16 to -20 dB Trim in 1 dB Steps
 Input Muting
 40-160 Hz Low-Cut and 7k-20k Hz High-Cut Filters
 Limiter with +18 to -30 Threshold Adjust
 10-Segment Metering for Each Input
 Cross-coupled Direct Outputs
 100Base-T Network Transmission/Monitoring
 24-bit A/D Converters with 20/24-bit Transmit Mode
 Four Network Monitor Channels with 24-bit D/A Converters
 Programmable Memory Recall Port
Data Sheet-1
NM 84 Specifications
Parameter
Inputs: Type
Mic Mode: Input Impedance
..........Phantom Power
..........Gain Range
..........Equivalent Input Noise
..........THD+N
..........Maximum Input
Line Mode: Input Impedance
..........Gain Range
..........Output Noise
..........THD+N
..........Frequency Response
Input Filters: Type
..........High-Cut
..........Low-Cut
Gain Trim: Type
..........Range
..........Mute
Limiter: Type
..........Threshold Range
..........Attack
..........Decay
Direct Output: Type
..........Maximum output
A/D Converters: Type
..........Dynamic Range
..........Sample Rate
Monitor Outputs: Type
..........Maximum Output
D/A: Dynamic Range
..........Sample Rate
Metering: Type
..........Attack
..........Decay
Transmit Format
Network Receive
A/D Propagation Delay
D/A Propagation Delay
Network Propagation Delay
Communications:
..........100Base-T Ethernet
..........RS-232
Power Supply: Agency Listing
...........120 VAC model
...........230 VAC model
Power Supply Input
Unit: Construction
...........Size
...........Weight
Shipping: Size
...........Weight
Note: 0 dBu=0.775 Vrms
Data Sheet-2
Specification
Active Balanced
5.2k
+48
15 to 60
-128
0.05
+4
6.8k
-5 to +10
-87
0.05
40-20k
2nd-Order Butterworth
7k
160
VCA
+18 to –20
-69
Analog, Feedforward
+18 to –30
20
60
Active Balanced
+24
Delta-Sigma
103
48k
Active Balanced
+20
102
48k
Peak dBu
20
60
20/24-bit
24-bit
666.7
520.8
5.33
RJ-45 Connector
DB-9
RS 3 (see data sheet)
UL
CSA
CE-EMC
CE-Safety
85 to 265
All Steel
3.5" H x 19" W x 8.5" D (2U)
9 lb (w/o power supply)
4.5" x 20.3" x 13.75"
13 lb
Limit
Units
1%
4%
1
max
typ
Ω
Volts
dB
dBu
%
dBu
Ω
Conditions/Comments
XLR connectors
@ 1 kHz
10 mA max/channel (80 mA total)
15, 30, 45, 60 @ 1 kHz
20-20k Hz, 150 Ω source, gain: 60 dB
+4 dBu, 1 kHz, 20 kHz bandwidth
Gain: 15 dB, @ 1 kHz
@ 1 kHz
-5, +10, @ 1 kHz
20 kHz bandwidth, Gain +10
+4 dBu, 1 kHz, 20 kHz bandwidth
1%
1
1
typ
+0/-3
dB
dBu
%
dB
5%
5%
Hz
Hz
On-off switch
On-off switch
1
2
dB
dB
1 dB steps
10%
10%
dBu
ms
ms
min
dBu
typ
dB
Hz
1 dB steps; 2 dB accuracy
10 dB step, settle within 2 dB
10 dB step, settle within 2 dB
Cross-coupled; XLR connectors
@ 1 kHz, 2 kΩ load
24-bit conversion
A-weighted
min
typ
dBu
dB
Hz
10%
10%
ms
ms
µs
µs
ms
VAC
Cross-coupled: XLR connectors
@ 1 kHz, 2 kΩ load
A-weighted
24-bit conversion
2 dB accuracy
Settle within 2 dB
Settle within 2 dB
Transmit 8 mic inputs on up to 4 bundles
Accepts 16-, 20-, or 24-bit words
32 samples at 48 kHz
25 samples at 48 kHz
256 sample at 48 kHz
100 meters max using CAT-5 UTP cable;
2,000 meters using fiber media converter
Maximum cable length 50'
Class 2 Equipment
File No. E132267
File No. LR57450-99
EMC Directive 89/336/EEC
LVD 73/23/EEC
IEC line cord jack
(8.9 cm x 48.3 cm x 21.6 cm)
(4.1 kg)
(11.5 cm x 52 cm x 35 cm)
(5.9 kg)
(20-/24-Bit Broadcast)
NM 84 Block Diagram
Data Sheet-3
NM 84
NETWORK MIC PREAMP
NM 84 Rear Panel
MONITOR OUTPUTS
NM 84
MADE IN U.S.A.
RANE CORP.
N108
DIRECT OUTPUTS
MANUFACTURED UNDER LICENSE
FROM PEAK AUDIO INC.
U.S. PAT. NOS.
4,922,536 5,761,430 5,761,431
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC
RULES. OPERATION IS SUBJECT TO THE FOLLOWING
TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE
HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST
ACCEPT ANY INTERFERENCE THAT MAY CAUSE
UNDESIRED OPERATION.
4
3
1
8
7
6
5
4
3
2
1
4
3
2
1
MIC INPUTS
POWER
100Base-T
2
MEMORY RECALL
PORT (MRP)
RS 232
COM 1
2
3
4
5
6
7
8
COM 1
2
3
4
5
6
7
8
FP
LOCK
COND LINK FAULT
USE RANE RS 3
POWER SUPPLY ONLY
8
7
6
5
Applications
 Arenas
 Convention Centers
 Churches
 Schools
 Theme Parks
Anywhere multiple channels of deterministic, high-quality
digital audio transport is required with the full flexibility of
CobraNet 100Base-T network technology.
Architectural Specifications
The Network Microphone Preamplifier (CobraNet audio
network device) shall provide 8 mic- or line-level inputs
utilizing female XLR connectors, 8 line-level Direct Outputs
utilizing male XLR connectors and 4 line-level, Monitor
Outputs utilizing male XLR connectors.
Each input shall feature selectable Mic and Line modes,
Mute, Trim, coarse Gain select, 48 volt phantom power, Highand Low-Cut Filters, Limiter and 10-segment meter.
Each input shall route to a balanced, discrete crosscoupled Direct Output capable of +24 dBu signals. All 8
inputs shall transmit on up to four independent CobraNet
Bundles.
Each of the four Monitor Outputs shall independently
monitor (receive) any one of the eight possible Audio Channels of any CobraNet Bundle -or- any one of the eight
possible Local Mic Inputs. Monitor Outputs shall provide 24bit D/A converters and discrete cross-coupled outputs capable
of +20 dBu signals.
Bundles 0 through 999 (0-65,000 using CobraCad software) shall be supported for network transport.
Twenty-four-bit A/D converters shall provide the digital
audio signal for 100Base-T transport over the CobraNet
network. Audio shall be transmitted in 20- or 24-bit word
lengths.
Control of all parameters shall be possible using the front
panel interface, the rear panel, contact-closure Memory Recall
Port (MRP), SNMP or via ActiveX controls. ActiveX controls
shall be easily integrated within control interface web pages
using one of a variety of web-authoring software tools.
The network device shall transmit and receive one channel
of RS-232 data over the 100Base-T network. The user shall
set the baud rate as well as the transmit (Tx) and receive (Rx)
RS-232 channels to utilize.
The Memory Recall Port shall allow up to 16 preset
Memories to be recalled with simple switch closures to
ground. In addition to Local MRP switches, the network
device shall respond to Network MRP messages when set
accordingly. The network device shall transmit Local MRP
closures for monitoring by other NM network devices on the
network.
The device shall have certified compliance with FCC Part
15J for a Class B computing device and EMCD 89/336/EEC
(CE approved). The unit shall be powered from a UL listed,
CSA certified remote power supply meeting LVD 73/23/EEC
and EMCD 89/336/EEC standards. The unit shall be constructed entirely of cold-rolled steel.
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 TEL 425-355-6000 FAX 425-347-7757 WEB www.rane.com
Data Sheet-4
All features & specifications subject to change without notice. DOC 108214
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