Rane NM 48 User Manual

DATA SHEET

Description

The NM 48 Network Preamplifier allows one to send four
channels and receive eight channels of high quality audio over
a single, low cost computer network cable. The NM 48
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 48 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 48s or by combining NM
48s with Rane NM 84 Network Mic Preamplifiers.

The NM 48 Network Preamplifier features Peak Audio
100Base-T CobraNet™ technology. CobraNet technology
allows deterministic (fixed propagation delay), transport of up
to 64 channels of audio on a single computer network cable.
Each Bundle can contain up to eight, 20-bit Cobranet Audio
Channels.

The NM 48 can put four 24-bit audio channels on to the
network and get eight 24-bit audio channels from the network.
Network control is possible using the rear panel Memory
Recall Port (MRP), SNMP or ActiveX controls provided by
Rane. All NM 48 parameters may be controlled from the front
panel interface.

NM 48

NETWORK PREAMPLIFIER

The NM 48 provides four balanced line-level inputs. 24­bit A/D converters provide the digital audio signal for
100Base-T transport. Audio may be transmitted in 20- or 24­bit mode. All four input channels may be transmitted on a
single Bundle (the term formerly known as Network Chan­nel). The NM 48 may transmit up to 4 bundles. (the NM 48
can identify the addresses of 999 Bundles).

The NM 48 also provides eight high-quality monitor
output channels. Each output may be assigned to monitor any
one of the eight Cobranet Audio Channels (the term formally
known as Sub-channel) contained in one of four Bundles or
any one of the four Local channels.

The NM 48 can transmit and receive one channel of RS­232 data over the network. The user may set the baud rate as
well as Tx and Rx network channels.

A Memory Recall Port (MRP) allows up to 16 pre-set
Memories to be recalled with simple switch closures to
ground. In addition to Local MRP, the NM 48 may be set to
respond to Network MRP. It may also transmit Local MRP
over the network for monitoring by other NM 48s or NM 84s.

The NM 48 is fully compatible with other existing
CobraNet products using current Cobranet Firmware.

Features

• Four Balanced Line-level Inputs with 24-bit A/D Converters

• 24-bit Transmit Mode

• Eight Balanced Monitor Outputs with 24-bit D/A Converters

• 10-Segment Metering for Each Output

• 100Base-T Network Transmission/Monitoring

• SNMP or ActiveX control of Parameters

• Front Panel Control of All Parameters

• Front Panel Lock-Out Switch

• Programmable Memory Recall Port

• RS-232 and MRP Network Transport

Data Sheet-1

NM 48

NETWORK PREAMPLIFIER

Features and Specifications

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Data Sheet-2

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NM 48

NETWORK PREAMPLIFIER

Block Diagram

Data Sheet-3

NM 48

NETWORK PREAMPLIFIER

NM 48 Rear Panel

NM 48

MADE IN U.S.A.

RANE CORP.

N108

POWER

USE RANE RS 3

POWER SUPPLY ONLY

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.

100Base-T

Applications

• Arenas

• Convention Centers

• Churches

COND

OUTPUTS INPUTS

8765

MEMORY RECALL

RS 232

FAULTLINK

PORT (MRP)

COM

1234 657

COM 43216578

8

FP

LOCK

4321 432 1

Further Information

RaneNote: Controlling Audio Systems with ActiveX

available at www.rane.com

• 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.

©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 TEL [phone] FAX [phone] WEB www.rane.com

Data Sheet-4

All features & specifications subject to change without notice. DOC 104089