Aviom 6416YZ User manual

P/N 9310 1017 0001F rev. 1.00
© 2007 Aviom, Inc.
User Guide
A-Net Interface Card

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Trademarks
Aviom and the Aviom logo are trademarks of Aviom, Inc.
A-Net and the A-Net logo are trademarks of Aviom, Inc.
Pro16, Pro64, and Virtual Data Cables are trademarks of Aviom, Inc.
All other trademarks are the property of their respective owners.
Information in this document is subject to change without notice.
Copyright ©2007 Aviom, Inc.
Printed in USA
Certifications
ETL/cETL Listed
EMC: EN 55103-1, EN 55103-2, SAA AS/NZS 1053
Conforms to: IEC 60065, EN 60065, UL 60065
Certified to: CAN/CSA E60065, KETI
RoHS Status: Pb-free
Notice of Rights
All rights reserved. No part of this document may be reproduced or
transmitted in any form or by any means—electronic, mechanical,
photocopy, recording, or otherwise—without written permission of
Aviom, Inc.

iii
NO USER SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY
To reduce the risk of fire or electrical shock, do
not expose this product to rain or other types of
moisture.
Operating Temperature: 10˚C to 50˚C (50˚F to 122˚F)
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WARNING!
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CAUTION:
Using any audio system at high volume levels
can cause permanent damage to your hearing.
Set your system volume as low as possible.
Avoid prolonged exposure to excessive sound
pressure levels.
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IMPORTANT:
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in
a residential installation. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment
and receiver.
Connect the equipment into an outlet on a
circuit different from that to which the receiver is
connected.
Consult the dealer or an experienced radio/TV
technician for help.
Changes or modifications to the product not expressly approved by Aviom,
Inc. could void the user’s FCC authority to operate the equipment.
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CAUTION
Risk of electric shock!
Do Not Open
WARNING!
To reduce the risk of fire or
electric shock do not expose
this product to rain or moisture.
AVIS: Risque de choc electrique!
Ne pas ouvrir

iv
Important Safety Instructions
Read these instructions.
Keep these instructions
Heed all warnings.
Follow all instructions.
Do not use this apparatus near water.
Clean only with a dry cloth.
Do not block any ventilation openings. Install in accordance
with the manufacturer’s instructions.
Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers) that
produce heat.
Do not defeat the safety purpose of the polarized or grounding-
type plug. A polarized plug has two blades with one wider than
the other. A grounding type plug has two blades and a third
grounding prong. The wide blade or third prong is provided
for your safety. If the provided plug does not fit your outlet,
consult an electrician for replacement of the obsolete outlet.
Protect the power cord from being walked on or pinched,
particularly at plugs, convenience receptacles, and the point
where they exit the apparatus.
Only use attachments/accessories specified by the
manufacturer.
Use only with the cart, stand, tripod, bracket, or table specified
by the manufacturer, or sold with the apparatus. When a
cart is used, use caution when moving the cart/apparatus
combination to avoid injury from tip-over.
Unplug this apparatus during lightning storms or when unused
for long periods of time.
Refer all servicing to qualified personnel. Servicing is required
when the apparatus has been damaged in any way, such as
when the power-supply cord or plug is damaged, liquid has
been spilled or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture, the unit does
not operate normally, or it has been dropped.
The solid line over dashed line symbol ( ) indicates that
the input voltage must be a DC voltage.
The box within a box symbol ( ) indicates that the external
power supply is double insulated.
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Warranty Information
Please record the following information for future reference:
Your Authorized Aviom Dealer:
Name:
Address:
Phone:
Serial Number of Your Aviom Product:
Date of Purchase:
Your Authorized Aviom Dealer is your primary source for service
and support. The information recorded above will be helpful in
communicating with your Authorized Aviom Dealer should you need to
contact Aviom Customer Service. If you have any questions concerning
the use of this unit, please contact your Authorized Aviom Dealer
first. For additional technical support, check the Aviom website at
www.Aviom.com.
To fulfill warranty requirements, your Aviom product should be serviced
only at an authorized Aviom service center. The Aviom serial number
label must appear on the outside of the unit, or the Aviom warranty is
void.
This manual and its contents are copyrighted by Aviom, Inc. All rights
are reserved by Aviom, Inc. This document may not, in whole or in part,
be copied, photocopied, reproduced, translated, or reduced to any
electronic medium or machine-readable form without prior written
consent from Aviom, Inc.
The software and/or firmware contained within Aviom products is
copyrighted and all rights are reserved by Aviom, Inc.
Although every effort has been made to ensure the accuracy of the text
and illustrations in this manual, no guarantee is made or implied as to
the accuracy of the information contained within.

vi
Aviom, Inc. Limited Warranty
Aviom, Inc. warrants this product against defects in materials and workmanship
for a period of one year from the date of the original retail purchase.
This warranty does not apply if the equipment has been damaged due to
misuse, abuse, accident, or problems with electrical power. The warranty also
does not apply if the product has been modified in any way, or if the product
serial number has been damaged, modified, or removed.
If a defect is discovered, first write or call Aviom, Inc. to obtain a Return
Authorization number. No service will be performed on any product returned
without prior authorization. Aviom, Inc. will, at its discretion, repair or replace the
product at no charge to you. The product must be returned during the warranty
period, with transportation charges prepaid to Aviom, Inc., 1157 Phoenixville
Pike, Suite 201, West Chester, PA 19380, USA. You must use the product’s original
packing materials for shipment. Shipments should be insured for the value of
the product. Include your name, address, phone number, description of the
problem, and copy of the original bill of sale with the shipment. The Return
Authorization number should be written on the outside of the box.
THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS. YOU MAY HAVE
OTHER RIGHTS, WHICH VARY FROM STATE TO STATE (OR JURISDICTION TO
JURISDICTION). AVIOM’S RESPONSIBILITY FOR MALFUNCTIONS AND DEFECTS
IN HARDWARE IS LIMITED TO REPAIR AND REPLACEMENT AS SET FORTH IN THIS
LIMITED WARRANTY STATEMENT. ALL EXPRESS AND IMPLIED WARRANTIES FOR
THE PRODUCT, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN
DURATION TO THE WARRANTY PERIOD SET FORTH ABOVE. NO WARRANTIES,
WHETHER EXPRESS OR IMPLIED, WILL APPLY AFTER SUCH PERIOD.
AVIOM, INC. DOES NOT ACCEPT LIABILITY BEYOND THE REMEDIES SET FORTH
IN THIS LIMITED WARRANTY DOCUMENT. AVIOM, INC.’S LIABILITY IS LIMITED TO
THE REPAIR OR REPLACEMENT, AT OUR OPTION, OF ANY DEFECTIVE PRODUCT,
AND SHALL IN NO EVENT INCLUDE INCIDENTAL OR CONSEQUENTIAL DAMAGES
OF ANY KIND.
SOME STATES DO NOT ALLOW EXCLUSIONS OR LIMITATION OF IMPLIED
WARRANTIES OR LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO
THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.

vii
Warning
Failure to observe the following warnings may lead to risk of
serious injury from fire or electric shock.
Before installing the 6416Y2 card, you must refer to the owner’s manual
of the host device or to the Yamaha website to verify that your host
device supports this card, and to verify the number of cards that can be
installed in combination with other Yamaha or third-party cards.
Do not attempt to disassemble or modify the card. Do
not apply excessive force to board connectors or other
board components. (Mishandling the board may lead
to shock, fire hazard, or equipment failure.)
You must turn off the power of your device before you
begin installing the 6416Y2 card.
Be sure to disconnect the power cable from the main
unit before installing this card (to eliminate shock
hazard).
Caution
Failure to observe the following precautions may lead to
personal injury, or may result in damage to equipment or other
property.
Do not touch the board’s metallic leads (pins) when
handling the card. (Pins are sharp and may cause hand
cuts.)
The card is electrostatic-sensitive. Before handling the
card, you should briefly touch the main unit’s metal
casing with your bare hand so as to drain off any static
charge from your body.
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Table of ConTenTs
Warranty Information ....................v
Warning .......................... vii
Caution........................... vii
Welcome ...........................1
Features........................1
Package Contents . . . . . . . . . . . . . . . . . . . 2
The EtherCon Connector . . . . . . . . . . . . . . . . 2
Cat-5eCables .....................2
DIPSwitches......................3
Compatibility .....................3
Cleaning ...........................4
About A-Net .........................5
Clocking........................6
ControlData......................6
A-NetPorts.......................6
Support For Pro16 Series Products . . . . . . . . . . . 7
Pro64 User Interface .....................8
A-NetSlot .......................8
Slots versus Channels. . . . . . . . . . . . . . . 8
Slots and Sample Rate . . . . . . . . . . . . . . 9
A-Net Base Slot . . . . . . . . . . . . . . . . . . . . 10
A-Net Slot Example. . . . . . . . . . . . . . . 11
NetworkModes.................... 13
AutoMode................... 13
ManualMode ................. 13
Control Master ...................... 15
Setting Control Master Status . . . . . . . . . . . . . 16
Control Master Functions ................. 17
Enumeration..................... 17
Adding Pro64 Modules to a Network . . . . . . 18
Control Master and Clock Source . . . . . . . . . . . 18
ClockErrors .................. 19
Network Sample Rate . . . . . . . . . . . . . . . . 19
Changing the Sample Rate . . . . . . . . . . . 20
Auto/Manual Mode Selection . . . . . . . . . . . . . 20
Changing the Network Mode . . . . . . . . . . 21
ManagedMode....................21
Password Protection . . . . . . . . . . . . . . . . . 21
Installing the 6416Y2 Card.................23
Installing Multiple 6416Y2 Cards . . . . . . . . 24
6416Y2 Card Components .................25
Front Panel Features....................25

ix
ThumbScrews....................25
RS-232/422 Port . . . . . . . . . . . . . . . . . . . 25
DIPSwitches.....................26
Clock and Control DIP Switches . . . . . . . . . . . . 26
Stereo Link DIP Switches . . . . . . . . . . . . 27
SystemLock..................27
Remote/Local Control . . . . . . . . . . . . . 27
Local Code Update . . . . . . . . . . . . . . . 27
Control Master/Slave . . . . . . . . . . . . . . 27
A-NetPorts......................28
Front Panel LEDs . . . . . . . . . . . . . . . . . . . 28
AutoLED....................28
Control Master (CTL) LED . . . . . . . . . . . . 28
Clock (CLK) LED . . . . . . . . . . . . . . . . 29
Error (ERR) LED . . . . . . . . . . . . . . . . . 29
A-NetLED...................29
Circuit Board DIP Switches.................30
DIP Switch Block Functions . . . . . . . . . . . 30
DIP Switch Functions ................... 31
DIP Switch Block 1 (SW1) . . . . . . . . . . . . . . . 31
DIP Switch Blocks 3 and 4 (SW3, SW4) . . . . . . . . . 32
Baud Rate Table . . . . . . . . . . . . . . . . 33
DIP Switch Block 8 (SW8) . . . . . . . . . . . . . . . 34
VDC Slot Assignments - Backplane VDC Port . . 34
VDC Slot Assignments - Front Panel VDC Port . . 35
MY8 and MY16 Mode Operation . . . . . . . . 36
DIP Switch Block 9 (SW9) . . . . . . . . . . . . . . . 36
Network Mode (Auto/Manual) . . . . . . . . . 37
A-Net Transmit Settings (Manual Mode) . . . . 37
A-Net Receive Settings (Manual Mode) . . . . . 37
A-Net Transmit Base Slot Settings . . . . . . . 37
A-Net Receive Base Slot Settings . . . . . . . . 38
Managed Mode . . . . . . . . . . . . . . . . 38
Remote Control of Yamaha Mic Preamps .........39
BaudRates......................39
SettingUp......................40
Connection Example . . . . . . . . . . . . . 41
RS-232/422 Pinout . . . . . . . . . . . . . . . . . . 42
Dimensions ........................44
DIP Switch Templates ...................46
Specifications .......................48
6416Y2 Card Block Diagram ................49
Index ............................50

x

1
About Your Pro64 Product
Welcome
Thank you for purchasing the 6416Y2 A-Net Interface Card for use
with Yamaha® digital products that support the mini-YGDAI (MY) card
format. This User Guide is designed to familiarize you with the features
and functions of your new Pro64™ product. In developing the Pro64
Series, we have made every effort to make the user interface as easy to
use and understand as possible. We encourage you to read the manual
completely, as some of the powerful features of your new product may
not be immediately apparent.
Features
The 6416Y2 A-Net Interface Card is a 16-channel Pro64 A-Net® I/O
expansion card for Yamaha’s digital devices including digital mixing
consoles and the Digital Mix Engine™ (DME) products. It provides a host
of professional features designed to make audio networking with Pro64
Series products easy to set up and configure in a variety of professional
audio situations.
6416Y2 A-Net Interface Card Features:
Compatible with Yamaha mini-YGDAI (MY) expansion
card format
Sixteen input and output channels (Note: 8 channels
only on the PM1D console)
Inputs from the console can be individually activated
into the Pro64 network
A-Net base slot range can be independently set for
inputs and output banks
The 6416Y2 card can be both the Pro64 network
Control Master and the network Clock Master
Flexible and robust clocking allows simple console-to-
console digital connections
Front-panel Stereo Link DIP switches for channel
pairing for use with Pro16 Personal Mixers
Two A-Net network ports
EtherCon® RJ45 network connectors
Support for Pro64 Virtual Data Cables™ (VDC™)
Variable sample rates: 44.1/48kHz or 88.2/96kHz
RS-232/422 Virtual Data Cable I/O (compatible with the
Yamaha remote control protocol)
Multiple cards can be installed per console or DME
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2About Your Pro64 Product
Package Contents
Check the contents of the shipping box carefully before making
connections and continuing with installation.
The contents of the 6416Y2 A-Net Interface Card box includes:
One 6416Y2 A-Net Interface Card
User Guide
PNote Retain the protective bag that encloses the 6416Y2 card. The
card is static-sensitive. Use the bag whenever the card will
be transported without being installed in a Yamaha device.
The EtherCon Connector
Pro64 Series products feature locking connectors for all network I/O.
The Neutrik® EtherCon® connector is a dual RJ45-type connector that
can receive a standard Category 5e cable or a cable fitted with the
special locking EtherCon connector.
When using a standard Cat-5e cable, plug the cable into the center of
the EtherCon jack; release the cable by pressing on the small plastic tab
built into the cable connector.
The locking EtherCon connector is similar to an XLR plug, the kind
commonly used on microphone cables. Insert an EtherCon-equipped
cable into the jack until it clicks and locks in place. To remove the cable,
press on the metal release tab at the top of the panel-mounted EtherCon
jack and pull the connector outward.
RS–232/422
STEREO LINK
6416Y 2
B A
ON
CTLCLKAUTO ERR
1 2 3 4 5 6 7 8 9 10 11 12
The 6416Y2 has two A-Net ports, labeled A and B.
Cat-5e Cables
All Cat-5e connections between A-Net devices should use Unshielded
Twisted Pair (UTP) cable. The cable can be of the stranded or solid type;
solid wire performs better over long distances, while stranded wire is
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3
About Your Pro64 Product
more flexible and easier to manipulate and therefore easier to work
with in a live performance situation.
Cables designated as Cat-5e in Pro64 documentation can be
interchanged with any Cat-6 (or better) cable. Cables will be referred to
simply as “Cat-5e.”
Connectors on Cat-5e cables used with Pro64 devices can be of the
standard RJ45 variety or locking Neutrik EtherCon type.
DIP Switches
Illustrations of Pro64 DIP switch components in this document will
indicate the switch handles in black.
In this diagram, all switches are in the down position.
Compatibility
The Aviom 6416Y2 A-Net Interface Card is compatible with the following
Yamaha devices:
Device Mini-YGDAI
Expansion Slots
AW2816 1
AW4416 1
AW2400 1
O1V96 1
O2R96 4
DM1000 2
DM2000 6
DME24N 2
DME64N 4
PM5D/PM5D-RH 4
DSP5D 2
PM1D (8 channels only) 8
M7CL-32, M7CL-48 3

4About Your Pro64 Product
Cleaning
Before cleaning a Pro64 product, turn off the power switch and unplug
the unit from the AC power source.
To clean the surface of the Pro64 product use a clean, soft lint-free cloth
that has been slightly moistened with water only. For tougher dirt, use a
cloth slightly dampened with water or with a mild detergent. Always be
sure to dry the surface of the unit before proceeding with use.
When cleaning your Aviom products, never spray cleaners directly onto
the product surfaces. Instead, spray a small amount of the cleaning
solution onto a clean cloth first. Then use the dampened cloth to clean
the product.
Never use solvents or abrasive cleaners on the finished surfaces of your
Aviom products.

5
About A-Net
About A-Net
Aviom’s A-Net® is the only networking technology conceived, designed,
and optimized for managing and distributing audio using ordinary
Cat-5e cables. As implemented in the Pro64™ Series products, A-Net
can transmit up to 128 channels of uncompressed 24-bit audio with the
reliability and fidelity of analog, and the power and flexibility of a true
digital network.
Pro64 A-Net allows variable sample rates in three ranges, from 44.1kHz±
to 192kHz±, with ultra-low latency, jitter, and wander. Pro64 devices
can be connected in any combination of serial (daisy-chain) or parallel
(star) topologies. Cable runs between Pro64 devices can be up to 400
feet (120 meters) on Cat-5e1, and miles on fiber optics (with Aviom fiber-
capable equipment).
Because A-Net is designed specifically for audio, the technological
limitations of Ethernet and Ethernet-based products are removed,
while audio performance and system flexibility are increased. A-Net
incorporates Aviom’s unique patented and patent-pending algorithms
for controlling clock jitter and wander, as well as system-wide latency—
regardless of an installation’s size, design, or clocking setup. A-Net
offers significant advantages in fidelity, performance, and flexibility
over Ethernet-based products.
A-Net uses the “physical” layer of Ethernet, but it eliminates all the
protocol elements that are designed for computers and IT-style
networking. In audio applications, these other layers reduce efficiency,
impose system restrictions, and introduce latency and timing instability.
By eliminating Ethernet data structures, A-Net creates a superior
network, with enhanced audio performance. With A-Net and the
Pro64 Series, Aviom continues to break new ground in the design and
development of innovative digital audio networking technologies and
solutions.
Pro64 Series Supported Sample Rates
Sample Rate Minimum Maximum
1x 44.1/48kHz 39.7kHz 52kHz
2x 88.2/96kHz 79.4kHz 104kHz
4x 176.4/192kHz 158.8kHz 208kHz
1 Cat-5e, Cat-6, or better, Unshielded Twisted Pair (UTP) cable

6About A-Net
Clocking
The Pro64 network offers the most flexible clocking and synchronization
options in the industry. Pro64 devices support three ranges of variable
sample rates, from 44.1/48kHz± to 192kHz±. Because no sample rate
converters are used, audio transmission is kept fast and clean, eliminating
the audio artifacts and signal degradation inherent to sample rate
conversion—even when syncing to an external clock source.
Any Pro64 I/O module can be designated the Clock Master for the
network, generating and distributing its internal clock. Digital I/O
modules are capable of syncing to and distributing an external clock
from a Word Clock or AES3 source.
Control Data
The Pro64 Series has built-in, dedicated bandwidth for 14 channels of
non-audio control data through the use of Aviom’s innovative Virtual
Data Cables™. These data streams are always available to carry MIDI,
RS-232, RS-422, or GPIO (General Purpose I/O), and they never compete
with the audio channels for network resources, regardless of the system
configuration. (Not all VDC™ data types are supported on every Pro64
module.)
Because VDC inputs are simply incorporated into the A-Net stream,
these control signals can be transmitted over very long cable runs
and even across an entire Pro64 network, significantly expanding the
applications possible with MIDI, RS-232/422, and GPIO. And as with
audio signals, VDC control data can be input anywhere and output
anywhere else in the network.
A-Net Ports
Pro64 I/O modules have dual A-Net ports, labeled A and B. Both ports
carry a bidirectional A-Net stream at all times. (That is, both ports are
always transmitting and receiving A-Net data.) Pro64 networks can be
configured in one of two operational modes, Auto Mode or Manual
Mode, depending on the requirements of a particular system.
In Auto Mode, there are no connection rules; connect a Cat-5e cable to
either the A or B port and the system does the rest. Auto Mode provides
a true audio network with 64 available “Slots” for transporting audio (at
44.1/48kHz). Every audio Slot is available everywhere in the system, with
no upstream/downstream restrictions.
In Manual Mode, the Pro64 network becomes a 64x64 system (at 48kHz),
similar to a traditional stage-to-FOH snake. At every point in the Manual

7
About A-Net
Mode network, two 64-channel streams are available on the cable and
in each module. The configuration of the cables and ports has an impact
on the makeup of the network and the distribution of audio signals. The
user can direct A-Net data from an input module to a specific port (A,
B, or both). Output modules can be configured to output audio signals
from a specific port (A or B).
Support For Pro16 Series Products
Pro64 Series products can be combined with Pro16™ Series output
products such as the Pro16 Monitor Mixing System by adding the Pro64
ASI A-Net Systems Interface. This 1U module converts Pro64 data to
Pro16 data, providing up to four streams of 16-channel data (depending
on the Pro64 sample rate) that can be used with A-16II and A-16R
Personal Mixers, A-Net Distributors, and AN-16/o Output Modules. The
ASI is not compatible with the A-Net output of Pro16 input devices such
as the AN-16/i, AN-16/i-M, the Y1 console interface card (for Yamaha
digital products) and D-16c card (for DiGiCo® digital products).

8Pro64 user iNterfAce
Pro64 User Interface
This section outlines some basic concepts of operation for Pro64
products. Pro64 I/O devices have some common user interface elements
that make setting up an audio network easy to understand. Although
the 6416Y2 is set up using DIP switches, its interface elements are similar
to other Pro64 hardware I/O modules that use buttons and LEDs for
comparable features (seen in some of the examples). Any combination
of Pro64 devices can be used when setting up a network.
A-Net Slot
Pro64 I/O devices come in a variety of configurations (8-channel,
16-channel, etc.). To allow a large number of hardware audio input
devices to be available to the Pro64 audio network, Aviom has
implemented the concept of the A-Net Slot to simplify the configuration
of potentially complex audio networks. Simply put, an A-Net Slot is a
place in the network where an audio input resource (analog or digital)
is assigned.
A Pro64 audio network will always have a finite number of A-Net Slots
available that can be addressed by an unlimited number of hardware
channels. The actual number of available Slots is determined by the
current sample rate.
Slots versus Channels
You might be wondering why Aviom chose to refer to the audio I/O
resources in the Pro64 Series products as ‘’Slots.” Why not just call them
“channels”?
We did this to avoid confusion between references to hardware
audio resources and network audio resources. The word ‘’channel’’
is ambiguous and may cause confusion when configuring an audio
network. “Channel” appears in many contexts, including audio mixing
consoles, mic preamps, DSP processors, and DAW software.
We use the word ‘’channel’’ when referring to the physical audio
inputs—analog or digital—on a piece of hardware (such as the 16 line-
level XLR input jacks on the 6416i Input Module or a Yamaha console
resource such as a direct output or aux bus send). Each of these audio
inputs can be made active and added to the network individually, and
it is only when activated that they use any network resources (the A-Net
Slots). To allow this functionality, Pro64 products separate the hardware
resources from the available network resources by giving each hardware
input channel a switch or button that allows it to be added to the

9
Pro64 user iNterfAce
network as needed. (The 6416Y2 card uses DIP switches.)
It is these activated hardware resources that are being referred to as
“Slots.” Pro64 audio networks can potentially have a greater number of
audio channels and hardware I/O devices connected than the network
can make use of at one time. This provides flexibility without requiring
constant re-patching.
Keep in mind that a Pro64 A-Net network can only manage a specific
number of Slots at a time, and this number varies with the sample rate
being used. The maximums are 64 Slots in Auto Mode at the 48kHz
sampling rate and 64x64 Slots in Manual Mode at 48kHz.
In summary, think of “channels” as hardware resources that can be
added to the network as needed and “Slots” as locations within the
digital audio network pipeline that A-Net uses to move data throughout
the network.
Slots and Sample Rate
The current system-wide sample rate will determine the number of
A-Net Slots that are available. Auto Mode and Manual Mode have the
same number of Slots at each sample rate; only the direction of the data
is different.
Sample Rate A-Net Slots Yamaha Compatibility
44.1kHz 64 Yes
48kHz 64 Yes
88.2kHz 32 Yes
96kHz 32 Yes
176.4kHz 16 No
192kHz 16 No
Even though the network sample rate may change the available number
of A-Net Slots, the capacity of a hardware device does not change. That
is, a 16-channel input module in a 96kHz network can still have all of its
channels activated; all of its physical inputs can operate at 96kHz.
The current sample rate will also affect the display of available A-Net Slot
ranges. Slot ranges will always have the same maximum number as seen
in the sample rate chart. At 96kHz, for example, only Slots 1 through 32
are available; the Slot range from 33 to 64 is inactive and unavailable
at 96kHz. Slot ranges outside the maximum for the current sample rate
can be selected, but attempting to activate a channel in an unavailable
range will result in an error message on hardware I/O modules (the
selected channel button, A-Net Slot range, and sample rate LEDs will
all flash). Note that console interfaces such as the 6416Y2 card have no
A-Net Slot displays and cannot display these error messages.

10 Pro64 user iNterfAce
A-Net Base Slot
Since the capacity of the Pro64 network could be as high as 64 A-Net
Slots, Pro64 hardware I/O devices need a way of routing a selected
hardware channel to a selected network Slot. The 6416Y2 uses a block
of DIP switch (referred to as SW9) to select a base Slot range, in groups
of 16 channels. See page 36 for more info on A-Net Slot setup.
For Pro64 hardware I/O devices, the upper left corner of the front panel
contains a dedicated A-Net Slot display. Its associated inc/dec buttons
are used to select a range of Slots that the hardware device will address.
The A-Net Slot display and its inc/dec buttons are used to set the base
Slot for a Pro64 I/O module.
The following tables show examples of the channel-to-Slot correlation
for 16-channel Pro64 Series modules in a network running at the 48kHz
sample rate. The numbers in the Base Slot column will appear in the
A-Net Slot display of all I/O modules (the 6416Y2 has no Slot display).
16-Channel Pro64 Module Hardware Channels
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Base
Slot A-Net Slot
11 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
17 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
33 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
49 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
The use of Slot assignments allows for easy reconfiguration of audio
networks and sharing of hardware I/O resources and data without
physical re-patching.