Focusrite REDNET A16R MKII User Guide

User Guide

v1.0

www.focusrite.com

CONTENTS

About this User Guide
Box Contents
Safety Warning

INTRODUCTION

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INSTALLATION GUIDE

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RedNet A16R MkII Connections and Features

Front Panel
Rear Panel

Physical Characteristics
Power Requirements

REDNET A16R MKII OPERATION

First Use and Firmware Updates
Digital Clocking
Pull Up and Pull Down Operation
Sample Rate Converters
Level Controls
Operating Level

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OTHER REDNET SYSTEM COMPONENTS

REDNET CONTROL 2

Status Icons
ID (Identification)
Tools Menu

APPENDIX

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Connector Pinouts

Ethernet Connector
DB25 (AES59) Connector
XLR Connectors

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PERFORMANCE AND SPECIFICATIONS

Focusrite Pro Warranty and Service
Registering Your Product

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Customer Support and Unit Servicing
Troubleshooting

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2

About this User Guide

This User Guide applies to the RedNet A16R MkII analogue interface. It provides information about
installing and using the unit and how it can be connected into your system.

Should this User Guide not provide the information you need, then please consult:

https://pro.focusrite.com/technical-support, which contains a comprehensive collection of common

technical support queries.

Dante™ and Audinate™ are registered trademarks of Audinate Pty Ltd.

Box Contents

• RedNet A16R MkII unit

• 2 x IEC AC mains cables

• Safety information cut sheet

• Focusrite Pro Important Information Guide, which provides links to:
RedNet Control
RedNet PCIe drivers (included with RedNet Control download)
Audinate Dante Controller (installed with RedNet Control)
Dante Virtual Soundcard (DVS) Token and download instructions

Safety Warning

Warning – Shock Hazard

RedNet A16R MkII incorporates dual mains power supplies. Always ensure that both power

supply cables are disconnected from the rear panel before opening unit (eg., for servicing)

3

INTRODUCTION

Thank you for purchasing the Focusrite RedNet A16R MkII.

RedNet A16R MkII is a 1U 19in rack-mount interface featuring 16 channels of A-D & D-A plus one
AES3 channel-pair, for the Dante audio-over-IP network. The operating level is switchable between
18 dBu and 24 dBu, and Mute/Dim and Level controls are provided on each input and output channel.
Specifically tailored for the road, live-sound and broadcast environments, each unit features network
and power redundancy, rugged construction with latching connectors, remote control and remote
monitoring.

Dual Ethernet connectors (primary and secondary) on the rear-panel allow maximum network
reliability with seamless switchover to a secondary network in the unlikely event of a network failure.
These ports may alternatively be used to daisy-chain additional units when operating in Switched
mode.

Redundant power supplies (PSU A and B) with separate input sockets on the rear panel allow one
supply to be connected to an uninterruptible source. Each PSU’s status can be monitored remotely
over the network or from the front panel.

RedNet A16R MkII has a Sample Rate Convertor (SRC) on the AES3 input pair allowing instant
operation with any AES3 source irrespective of the sample rate or clocking of the Dante network.

Audio interface in provided by four standard 8-channel (AES59) Combined Analogue I/O DB25
connections. In addition, channels 17-18* act as the AES3 channels.

*When operating at quad sample rates the inputs to channels 17-18 will not be available. The user can then
select either: 1-16 analogue or 1-14 analogue and 15-16 AES3.

Word Clock I/O on BNC connectors allows synchronisation of the Dante network to house clock, or
the syncing of external equipment to the Dante network. DARS reference can also be accepted via
the XLR-3 input connector.

The RedNet A16R MkII front panel contains a set of LEDs to confirm PSU status, network status,
sample rate, clock sources and signal presence on both input and output.

4

INSTALLATION GUIDE

RedNet A16R MkII Connections and Features

Front Panel

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4

3

5 6 7

1

1 AC Power Switch

2 Power Indicators:

• PSU A – Illuminates when an AC input is applied and all DC outputs are present.

• PSU B – Illuminates when an AC input is applied and all DC outputs are present.

When both supplies are functioning and have AC inputs PSU A will be the default supply.

3 RedNet Network Status Indicators:

• PRIMARY – Illuminates when the device is connected to an active Ethernet network. Also
illuminates to indicate network activity when operating in Switched mode.

• SECONDARY – Illuminates when the device is connected to an active Ethernet network.
Not used when operating in Switched mode.

• LOCKED – Illuminates when a valid sync signal is received from the network, or when
the RedNet A16R MkII unit is the Network Master. Flashes if external clock is selected
but not connected.

4 RedNet Sample Rate Indicators

Five orange indicators: 44.1 kHz, 48 kHz, x2 (multiple of 44.1 or 48), x4 (multiple of 44.1 or 48)
and sample rate PULL UP/DOWN. These Indicators illuminate individually or in combination
to indicate the sample rate being used. For example, for a 96kHz Pull Up/Down setting, the
48kHz, x2 and Pull Up/Down indicators will illuminate.

5 Signal Level Indicators:

• INPUTS – Tri-colour LEDs indicate audio signal levels at the inputs to the network:
Green: Signal present (illuminates at -42 dBFS)
Orange: -6 dBFS
Red: 0 dBFS

• OUTPUTS – Tri-colour LEDs indicate audio signal levels at the outputs from the network:
Green: Signal present (illuminates at -42 dBFS)
Orange: -6 dBFS
Red: 0 dBFS

When operating at quad sample rates, the
indications for LEDs 15 and 16 will depend on
the signal mode selected

Mode LED 15 LED 16

Analogue Analogue ch 15 Analogue ch 16

AES3 AES3 Left AES3 Right

5

Front Panel . . .

6 AES3 Signal Presence Indicators

Green LEDs indicate if an AES3 signal is present IN to the network, and OUT from the network;
each illuminates at -126 dBFS.

6 7

When operating at quad sample rates, the IN and
OUT LEDs don’t illuminate if Analogue mode has
been selected.

Mode ‘IN’ LED ‘OUT’ LED

Analogue Off Off

AES3 Analogue ch 15/16 Analogue ch 15/16

7 Clock Source

Three orange indicators: Internal, Word Clock (BNC input) and DARS (XLR-3 input). Whichever

is lit identifies the clock reference being used. When an incoming clock source is invalid, the
‘Locked’ indicator will flash to indicate that the unit has reverted to using its internal clock.

None of the indicators will be lit when the device is a operating as a Dante Slave.

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Rear Panel

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7 8

6

91 2 3 4

1 IEC Mains Inlet A

Standard IEC receptacle for connection of AC mains. RedNet A16R MkII features ‘Universal’
PSUs, enabling it to operate on any supply voltage of between 100 V and 240 V.

2 IEC Mains Inlet B

Input connector for backup mains power source. Power supply B remains on standby but will
seamlessly take over if PSU A develops a fault or loses its mains input supply.

If an uninterruptable power supply (UPS) is available, it is recommended that this is applied to inlet B.

3 Primary Network Port

RJ45 etherCON connector for the Dante network. Use standard Cat 5e or Cat 6 network cables
to connect RedNet A16R MkII to the Ethernet network switch. Adjacent to each network socket
are LEDs which illuminate to indicate a valid network connection plus network activity.

4 Secondary Network Port

Secondary Dante network connection where two independent Ethernet links are being used
(Redundant mode), or an additional port on an integral network switch on the primary network
(Switched mode).

5 Word Clock Out

Provides an output of the chosen system clock reference (can be switched between base rate
or network rate).

6 Word Clock In

Allows synchronisation of the Dante network to house word clock.

Refer to the Appendix on page 16 for connector pinouts.

7

Rear Panel . . .

7 AES3 Out

Permanent AES3 output of audio channel pair 17-18.

When operating at quad sample rate, channels 17-18 become duplicates of channels 15-16. The output is
always available when operating in either AES3 or Analogue mode.

8 AES3 In

AES3 source for channels 17-18. May also be used as a clock source when fed with either AES3
or DARS (Digital Audio Reference Signal – AES3 distributed clock as per AES11). Software
selectable.

9 DB25 Analogue Connectors

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Analogue inputs and outputs on DB25 female connectors; eight channels per connector. Wired
to the AES59 analogue standard (also known as the Tascam standard).

Refer to the Appendix on page 16 for connector pinouts.

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Physical Characteristics

308 mm / 12.13”

465.0 mm / 18.3”

31.8 mm / 1.25”

RedNet A16R MkII dimensions are illustrated in the diagram above.

RedNet A16R MkII requires 1U of vertical rack space. Allow an additional 75mm of rack depth behind
the unit to allow for cables. Each unit weighs 4.75 kg and for installations in a fixed environment (eg.,
a studio rack), the front-panel rack mountings* will provide adequate support. However, if the unit
is to be used in a mobile situation (eg., flight-cased for touring, etc.), it is recommended that side
support rails or shelves are used within the rack.

*Always use M6 bolts and cage nuts specically designed for 19” equipment racks. An Internet search using the

phrase “M6 cage nuts“ will reveal suitable components.

Cooling is by fan assistance from side to side. The fans used are low-speed and low-noise.

Note. The maximum operating environmental temperature is 45°C / 113°F.

Ventilation is via slots in the enclosure at both sides. Do not mount RedNet A16R MkII immediately
above any other equipment which generates significant heat, for example, a power amplifier. Also,
ensure that when mounted in a rack, the side vents are not obstructed.

Power Requirements

RedNet A16R MkII is mains-powered. It incorporates ‘Universal’ power supplies which can operate
on any AC mains voltage from 100 V to 240 V. The AC connections are made via standard 3-pin IEC
connectors on the rear panel.

When PSU A & PSU B are both connected, PSU A becomes the default supply and therefore draws
more current than B. If a backup mains supply is provided from an uninterruptable source, it is
recommended that this is connected to input B.

Mating IEC cables are supplied with the unit; these should be terminated with mains plugs of the
correct type for your country.

The AC power consumption of the RedNet A16R MkII is 41 W.

Please note that there are no fuses in RedNet A16R MkII, or other user-replaceable components of
any type. Please refer all servicing issues to the Customer Support Team (see “Customer Support
and Unit Servicing” on page 18).

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REDNET A16R MKII OPERATION

First Use and Firmware Updates

Your RedNet A16R MkII may require a firmware update* when it is first installed and switched on.
Firmware updates are initiated and handled automatically by the RedNet Control application.

*It is important that the rmware update procedure is not interrupted – either by switching off power to the

RedNet A16R MkII unit or the computer on which RedNet Control is running, or by disconnecting either from the
network.

From time to time Focusrite will release RedNet firmware updates within new versions of RedNet
Control. We recommend keeping all RedNet units up to date with the latest firmware version supplied
with each new version of RedNet Control.

Digital Clocking

Each RedNet A16R MkII will automatically lock to a valid Network Master via its Dante connection.
Alternatively, if a Network Master is not present, then the unit can be chosen as the Network Master
by the user. Also see “Clock Source” on page 6.

Pull Up and Pull Down Operation

RedNet A16R MkII is able to operate at a specified pull up or pull down percentage as selected in the
Dante Controller application.

Sample Rate Converters

SRC will need to be switched in if the AES3 source is not using the current system clock as a reference
signal.

Note that engaging the sample rate converter will increase the overall latency of the device.

Level Controls

All analogue and digital I/O channels can be individually attenuated by up to 78 dB in 1 dB steps
via the RedNet Control graphical interface. Each channel can also be muted or dimmed; the Dim
function attenuates a channel by 20 dB.

Operating Level

The analogue I/O operating level can be set globally to either 18 or 24 dBu at 0 DBFS via the RedNet
Control ‘Tools’ menu. See page 13.

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OTHER REDNET SYSTEM COMPONENTS

The RedNet hardware range includes various types of I/O interface and the PCIe/ PCIeR digital audio
interface cards which are installed in the system’s host computer or in a chassis. All the I/O units
can be considered as “Break-Out” (and/or “Break-In”) boxes to/from the network, and all are built
in mains-powered, 19” rackmount housings, unless otherwise stated. There are also three software
items, RedNet Control (see below), Dante Controller and Dante Virtual Soundcard.

REDNET CONTROL 2

RedNet Control 2 is Focusrite’s customisable software application for controlling and configuring
RedNet and Red range interfaces. The system presents an image for each hardware unit, showing
its control levels and function settings, signal meters, as well as critical status indicators for power
supplies, clock status and the primary/secondary network connections.

The operator’s manual for the RedNet Control 2 application can be found here: www.focusrite.com/downloads

Please refer to the section ‘Device Control’ for additional details of device operation and setup using the software.

The single-tab GUI for the RedNet A16R MkII unit is shown below:

The image shows the Level control sliders, level meters and the Mute/Dim buttons for each of the
18 inputs and outputs.

Status icons for the PSUs and the network are shown at the left. See next page for icon descriptions.

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RedNet Control 2 . . .

When a RedNet A16R MkII is added to a tab containing either 6 or 12 devices, the graphical controls
are separated into three pages: ‘Meters’, ‘Inputs’ and ‘Outputs’, with I/O split into channels 1-8 or
9-18.

At full scale, 0 dBFS is indicated by a red bargraph segment on each level meter. ‘SRC’ Indicates that
the sample rate converters are switched in for the AES3 channel pair.

Status Icons

Status icons for the PSUs and the network are shown at the left of each device window:

PSUs A & B – Each illuminates if PSU has power input and all DC outputs are present

Networks – Each illuminates if a valid connection is present

Locked – Unit is successfully locked to the network (changes to the red cross if not locked)

External Clock – Green: unit is locked to the external source, Yellow: unit is locking,

Red: unit is attempting to identify a network, Off: no network

Network Master – Illuminates if a unit is the network master

ID (Identification)

Clicking on the ID icon will identify the device being controlled by flashing its front panel LEDs.

Tools Menu

Clicking on the Tools
icon will open
the System Settings
window:

The unit’s hardware
and firmware details,
as well as the current
device settings, are
displayed in the left
pane of the window.

12

Tools Menu . . .

Line Level Setup – Sets the analogue line output level at 0 dBFS:

• +18dBu

• +24dBu Factory default setting

Inputs 15 & 16 from XLR (Quad Rates) – Tick option. When selected, analogue channels 15 and 16
are replaced by the AES3 channel pair.

Note: Option is only functional when unit is operating at quad sampling rate.

Preferred Master – On/Off state.

Clock Source – Only one of the following can be selected at any time:

• Internal (RedNet is network master but running from internal clock) Factory default setting

• External – Word Clock

• External – XLR-3 Input (DARS or Audio)

Note: When selecting any clock source, RedNet A16R MkII will become a preferred master.

Word Clock Input Termination – Tick option On/Off. (Terminates word clock input BNC with 75Ω.)

Word Clock Output – One can be selected at any time.

• Network

• Network (Base Rate)

AES3 Input Sample Rate Converter – On/Off state. Applicable to channels 17 & 18.

AES70 – On/Off state.

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APPENDIX

1

8

Connector Pinouts

Ethernet Connector

Connector type: RJ-45 receptacle
Applies to: Ethernet (Dante)

DB25 (AES59) Connector

Connector type: DB25 receptacle
Applies to: Analogue I/O

113

25 14

Screw binding-posts use the standard UNC 4/40 thread

Pin Cat 6 Core

1 White + Orange
2 Orange
3 White + Green
4 Blue
5 White + Blue
6 Green
7 White + Brown
8 Brown

Pin Signal

1 Channel 8 +
14 Channel 8 –
2 Ground
15 Channel 7 +
3 Channel 7 –
16 Ground
4 Channel 6 +
17 Channel 6 –
5 Ground
18 Channel 5 +
6 Channel 5
19 Ground
7 Channel 4 +
20 Channel 4 –
8 Ground
21 Channel 3 +
9 Channel 3 –
22 Ground
10 Channel 2 +
23 Channel 2 –
11 Ground
24 Channel 1 +
12 Channel 1 –
25 Ground
13 n/c

XLR Connectors

Connector type: XLR-3 receptacle
Applies to: AES3, DARS Inputs

Connector type: XLR-3 plug
Applies to: AES3 Outputs

Pin Signal

1 Screen
2 Hot (+ve)
3 Cold (–ve)

14

PERFORMANCE AND SPECIFICATIONS

Line Inputs

0 dBFS Reference Level +18 or +24 dBu (switchable)

Level trim range Mute, then -78 dB to 0 dB in 1 dB steps (per channel)

Frequency Response 20 Hz – 20 kHz ± 0.1 dB

THD + N

EIN -95 dBu ‘A’-Weighted (typical)

Signal-to-Noise Ratio 119 dB ‘A’-Weighted (typical)

Convertor Dynamic Range 120 dB ‘A’-Weighted (typical), 10 Hz – 20 kHz

Line Outputs

0 dBFS Reference Level +24 or +18 dBu switchable

Level trim range Mute, then -78 dB to 0 dB in 1 dB steps (per channel)

Frequency Response 20 Hz – 20 kHz ± 0.1 dB

THD + N

Noise in Presence of
Signal

Dynamic Range 118 dB ‘A’-Weighted (typical)

All measurements taken at +24 dBu reference level, Rs = 50 Ω

-105 dB (0.00056%) unweighted, 20 Hz – 20 kHz; -1 dBFS input

<

All measurements taken at +24 dBu reference level, RL = 100 kΩ

-100 dB (0.001%) unweighted, 20 Hz – 20 kHz, +23 dBu input

<

-94 dBu ‘A’-Weighted (typical)

Convertor Dynamic Range 120 dB ‘A’-Weighted (typical), 10 Hz – 20 kHz

Crosstalk

Input to Output or Input

Output or Input to Output<-100 dB unweighted, 20 Hz – 20 kHz; -1 dBFS input

-100 dB unweighted, 20 Hz – 20 kHz; +23 dBu input

<

Input Sample Rate Converters

Sample Rate Range 32 to 216 kHz

Gain Error -0.3 dB

Dynamic Range

THD+N

Latency 11 to 45 samples (network and input sample rate dependent)

138 dB

>

-130 dB (0.00003%)

<

Digital Performance

Supported Sample Rates 44.1 / 48 / 88.2 / 96 / 176.4 / 192 kHz (-4% / -0.1% / +0.1% / +4.167%) at 24 bit

Clock Sources Internal, Word Clock, DARS or from Dante Network Master

External Word Clock
Range

Nominal sample rate ±7.5%

15

Performance and Specications . . .

Rear Panel Connectivity

Analogue Audio

Channel Count

Input and Output

16 channels input and output

4 x DB25 female connectors (AES59 / Tascam Analogue)

AES3

Channel Count

Alternate Input (optional
DARS)

Alternate Output

2 channels input and output

1 x XLR-3 female [Switchable with analogue input channels 15 and 16 at quad rates]

1 x XLR-3 male [Duplicate of analogue output channels 15 and 16 at quad rates]

Word Clock

Input

Output

1 x BNC 75 Ω port (switchable termination)

1 x BNC 75 Ω port

PSU & Network

PSU

Network

2 x IEC Inputs with retaining clips

2 x etherCON NE8FBH, also compatible with standard RJ45 connectors
(Accommodates rugged etherCON NE8MC* – Does not mate with Cat 6 cable connector
NE8MC6-MO and NKE65* cable)

Front Panel Indicators

Primary PSU (A) Green LED. Illuminates when an AC input is applied and all DC outputs are present

Secondary PSU (B) Green LED. Illuminates when an AC input is applied and all DC outputs are present

Green LED. Indicates that a network connection is present on primary port when in

Primary Network

Secondary Network

Network Locked

Sample Rate Orange LED for each: 44.1 kHz, 48 kHz, x2, x4

Pull Up/Down Orange LED. Indicates unit is set to operate on a Dante pull up/down domain

Channel Signal Level

AES3 Green LEDs: input & output signal present indicators. Illuminate at >-127 dBFS

Clock Source Orange LED for each: Internal, Word Clock, DARS

redundant mode. When in Switched mode, a valid network connection at either Primary or
Secondary network port will cause this LED to illuminate

Green LED. Indicates that a network connection is present on secondary port when in
redundant mode. Not used in switched mode

Green LED. When unit is network slave, shows valid network lock. When network master
shows unit is locked to indicated clock source.

16 Input and 16 Output tri-state signal level LEDs:
green (>-42dB), orange (>-6dB), red (0 dB).

Network Modes

Redundant Allows unit to connect to two independent networks

Switched Connects both ports to integrated network switch allowing daisy-chaining of devices

16

Performance and Specications . . .

Dimensions

Height 43.5 mm / 1.71” (1RU)

Width 482 mm / 18.98”

Depth 352 mm / 12.80”

Weight

Weight

5.0 kg / 11.1 lbs

Power

PSUs

2 x Internal, 100-240 V, 50/60 Hz, consumption 30 W

Environmental

Maximum ambient operating temperature 50°C. Cooling by two-stage fan assistance

17

Focusrite Pro Warranty and Service

All Focusrite products are built to the highest standards and should provide reliable performance
for many years, subject to reasonable care, use, transportation and storage.

Very many of the products returned under warranty are found not to exhibit any fault at all. To
avoid unnecessary inconvenience to you in terms of returning the product please contact Focusrite
support.

In the event of a Manufacturing Defect becoming evident in a product within 12 months from the date
of the original purchase Focusrite will ensure that the product is repaired or replaced free of charge.

A Manufacturing Defect is defined as a defect in the performance of the product as described and
published by Focusrite. A Manufacturing Defect does not include damage caused by post-purchase
transportation, storage or careless handling, nor damage caused by misuse.

Whilst this warranty is provided by Focusrite the warranty obligations are fulfilled by the distributor
responsible for the country in which you purchased the product.

In the event that you need to contact the distributor regarding a warranty issue, or an out-of-warranty
chargeable repair, please visit: www.focusrite.com/distributors

The distributor will then advise you of the appropriate procedure for resolving the warranty issue.
In every case it will be necessary to provide a copy of the original invoice or store receipt to the
distributor. In the event that you are unable to provide proof of purchase directly then you should
contact the reseller from whom you purchased the product and attempt to obtain proof of purchase
from them.

Please do note that if you purchase a Focusrite product outside your country of residence or business
you will not be entitled to ask your local Focusrite distributor to honour this limited warranty,
although you may request an out-of-warranty chargeable repair.

This limited warranty is offered solely to products purchased from an Authorised Focusrite Reseller
(defined as a reseller which has purchased the product directly from Focusrite Audio Engineering
Limited in the UK, or one of its Authorised Distributors outside the UK). This Warranty is in addition

to your statutory rights in the country of purchase.

Registering Your Product

For access to Dante Virtual Soundcard, please register your product at: www.focusrite.com/register

Customer Support and Unit Servicing

You can contact our dedicated Focusrite Pro Customer Support team free of charge:

Email: [e-mail]

Phone (UK): [phone]

Phone (USA): [phone]

Troubleshooting

If you are experiencing problems with your RedNet A16R MkII, we recommend that in the first in­stance, you visit our Support Help Centre at: https://pro.focusrite.com/help-centre

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