Audio Authority AccessEZ 972 User manual

Demonstration Network
Model 972 Installation Manual
Access Switching System Interface
for Model 1374A HDMI Switcher
TM

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About the 972 HDMI Access Interface
The Model 972 HDMI Interface allows Audio Authority Model 1374A (or previous Model 1374, see page 8)
HDMI switchers to be integrated into an Access™ Demonstration Network. One 972 adapter is required per
1374A HDMI switch. The 972 responds to commands received from the Access System, or it can respond to
Product Select Buttons connected directly to the 972 PSB ports. When the 972 receives a switching com-
mand from the Access Bus, it translates the number of the product that is to be selected into appropriate RS-
232 commands that can be sent to as many as 16 switches in the HDMI selection tree, allowing the desired
HDMI source output to be routed downstream to the rest of the demonstration system.
The 972 operates in either Master or Slave Mode. In Master Mode, the 972 behaves like other Access
electronics modules and is addressed in the same way as an Access source module except for the special
Module ID addressing (see the HDMI address tree on page 6). The address scheme must accommodate the
tree structure required for HDMI switches. Module ID addressing is explained in detail below.
In Slave mode, the 972 mirrors the switching activity of an Access electronics module, such as a 922, 954
or 947. The 972 in Slave mode is not directly connected to the EXPANSION port as other Access expanders
are, but must be addressed identically to the “master” Access module so that it can receive commands from it
through the System Bus. See page 3 and page 7 (Figure 10) for more on Slave mode.
Items included in this package Other items that may be needed
Model 972 Adapter System Bus Cable
Mounting Screw Prepack Product Select Buttons (PSBs)
Male-to-Male Serial Cable Model 1374A and HDMI Cables
PSB PORT 1
(PRODUCT
SELECT
BUTTON)
SYSTEM BUS
RS-232
CONNECTION
TO 1374A
SWITCHER
ADDRESS ROTARY
SWITCHES
MASTER / SLAVE
MODE SWITCH
• Connect the supplied serial cable
between the RS-232 ports on the Model
972 and the Model 1374A it is hosting.
• If using PSBs for product selection, plug
them into their respectively numbered
PSB ports on the 972.
• Connect one of the System Bus ports on
the 972 to a vacant System Bus port on
any other Access module using a length
of system bus cable.
• Each 1374A must be powered by its own
wall-mounted power supply (The Model
972 is powered via the Access Bus).
PSB
GROUP
MODULE MODE
S
M
SYSTEM BUS
RS-232
1
2
3
4FLASH
EXPANSION
Figure 1. Basic 972 Connections

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Using the 972 in Master Mode
For source switching, the 972 should generally be
used in Master Mode unless HDMI switching is be-
ing added to an existing Access switching system.
Access System expansion modules can be added
to 972s to switch additional signal types, such as
stereo audio.
Set the M/S switch on all 972 modules in the
source group to M and the Group switches to 0
(use 1 if another source group is already set to
0). Set the Module ID switch according to Figure
2, which also shows how to interconnect multiple
1374As to achieve the desired HDMI switching ca-
pacity, up to 48 sources. For more than 4 sources,
you must add second and possibly third level HDMI
switches to complete the HDMI address tree as
shown in Figure 7. The maximum product capacity
in Master Mode is 48 HDMI sources.
If you are adding the 972 to an existing Access
demonstration system in Master Mode to create
a new product group, carefully select its address
setting. Set the 972 to a Group number that is not used by other Access modules to prevent a conict.
Using the 972 in Slave Mode
For switching receiver audio outputs, it is usually best to use 972 in Slave Mode with the 947. It may also be
convenient to use the 972 in Slave Mode if HDMI switching capability is being added to an existing Access
source group as shown in Figure 10. In that case, the 972 acts as an expander module to a 955 module, but it
does not connect in the same physical manner as an expander module.
Set the M/S switch to S. Set the Group and Module ID to match the Group and Module ID of the existing Ac-
cess switch module(s) you would like to mirror. For more than 4 sources, you must add second and possibly
third level HDMI switches to complete the HDMI switching tree as shown in Figure 7. The second and third
level modules do not act as expanders to individual Access modules–set their Module ID according to the
illustration and Figure 7 and 8. The maximum product capacity in Slave Mode is 40 HDMI sources.
1T-SX-634
v1.3 4x1 SWITCHER
1 2 3 4
1234
ENHANCE POWERINPUT
HDMI OUT 5V DC
HDMI IN
RS-232
MMC-CLUX41AP-UTE
MMC-CLUX41AP-LTE
CLUX-41AP(TVONE) 2008.03.03
1:1
陳秋文
膜面向上
MMC-CLUX41AP-UTE
MMC-CLUX41AP-LTE
CONNECT
972
1374A
POWER
SUPPLY
HDMI Output to TV,
Receiver, or next level in
HDMI switching system
F
B
A
9
8
E
7
6
5
4
D
3
2
1
0
C
1374A
Module ID setting
on 972
Module ID setting on
972 in second level
Output to sink
(HDMI input on
TV, receiver, or
distribution system)
Figure 2. Module ID Settings Tree
When switching more than four HDMI sources, use this Module ID
tree conguration. See Figure 7 for larger systems.
Figure 3. 1374A Rear Panel

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Example System 1
A typical application for the 972 is to add HDMI source switching to a speaker switching system.
• The HDMI sources send audio and video to a dedicated HDMI receiver.
• The receiver’s speaker outputs are switched using Access speaker switching modules.
• The HDMI output of the receiver can provide audio to a TV, or the TV can be muted.
• Selections can be made using a control panel and/or product select buttons.
Connections
The Access switch modules including the 972 for each HDMI switcher are connected to the Access System
Bus for power and to receive commands from the control panel and/or product select buttons. Each 1374A
must be powered by its own power supply.
972 932 932
980
932
932 932 8 Left/8 Right
Surround
Speakers
8 Left/8 Right
Front Speakers
8 Center
Speakers
1374A
Switcher
4 HDMI
Sources
RS-232
HDMI Signals
System Bus
HDMI Signals
Front Speaker Bus
Surround Speaker Bus
Center Speaker Bus
Dedicated
Subwoofer
Sub
Dedicated
HDMI Receiver
HDTV
Figure 4. Example system 1 wiring diagram
Each product group shown (sources, front speakers, center speakers, rear speakers) can be expanded to include more than the
number of products shown by adding modules. To add sources, use the Scheme in Figure 7.
972 Module
Address Settings
There is only one source group, so 972 module should
be set to Group 0, and there is only one 972 module in
the group, so the Module ID setting should be 0.
To expand the number of HDMI sources, follow the
address scheme in Figure 7 and 8. Refer to the Access
System manual for settings on other switch modules.
PSB
GROUP
MODULE MODE
S
M
SYSTEM BUS
RS-232
1 2 3 4FLASH
EXPANSION
Group Address
Module ID Address
Figure 5.
972 Module Address Switches
GROUP: 0
MODULE ID: 0
MODE: MASTER

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Example System 2
In Example 2 the 972/1374A modules are congured for source output and then for receiver output. This
conguration would involve Access switching for receiver audio output and speaker switching (Model 947 and
932 modules), but only the HDMI portion is shown for clarity.
• The HDMI sources send digital audio and video through a 1374A switcher to a Model 1394A HDMI distribu-
tion amp. 972 is in Master Mode.
• The receivers all receive HDMI from the 1394A amp but their output is switched so that only one receiver’s
video output is shown on the TV at one time. 972 is in Slave Mode, mirroring the behavior of a 947 receiver
switch module.
• The 5.1 channel audio outputs from the receivers are switched using Model 947, and multiple speakers are
switched using 932 modules (Access modules not shown below).
• Selections can be made using a control panel and/or product select buttons (See Access manual for detail).
Connections
The Access switch modules, including the 972, for each HDMI switcher are connected to the Access System
Bus for power and to receive commands from the control panel and/or product select buttons. Each 1374A
must be powered by its own power supply.
972
1374A
Switcher
RS-232
HDMI Signals
System Bus
HDMI Signals
1394A
Distribution Amp
972
1374A
Switcher
RS-232
HDTV
AV Receiver 1
AV Receiver 2
AV Receiver 3
AV Receiver 4
HDMI Source 1
HDMI Source 2
HDMI Source 3
HDMI Source 4
Figure 6. Example System 2 wiring diagram
Each product group shown (sources and receivers) can be expanded to include more than the number of products shown by
adding modules. To add HDMI sources or receivers, use the address scheme in Figure 7.
Address Settings
The 972 module(s) in the source group should be set to group 0 (MASTER mode), and the receiver group
972 module(s) should be set to group 4 (SLAVE mode, matching the Model 947 switching group number).
Module ID settings should follow Figure 7 for any 972 module group.
RECEIVER
OUTPUT
SOURCE
OUTPUT
GROUP: 0
MODULE ID: 0
MODE: MASTER
GROUP: 4
MODULE ID: 0
MODE: SLAVE
(Match 947)

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F
B
A
9
8
E
7
6
5
4
D
3
2
1
0
C
1374A
Module ID setting
on 972
Module ID setting on
972 in second level
Figure 7. Module ID Settings Tree
When switching more than four HDMI sources, use this Module ID tree conguration. This diagram shows the maximum number of HDMI
inputs possible in an Access switching system.
Module ID setting on
972 in third level
Four HDMI source
outputs connect
to 1374A inputs on
rst level
Output to sink
(HDMI input on
TV, receiver, or
distribution system)

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Figure 8. Module ID Settings Chart
Address settings for different HDMI switching capacities are listed below.
HDMI 1st Level 2nd Level 3rd Level
Sources Module ID Module ID Module ID
4 0 n/a n/a
8 0, 1 C n/a
12 0, 1, 2 C n/a
16 0, 1, 2, 3 C n/a
20 0 - 4 C, D F
24 0 - 5 C, D F
28 0 - 6 C, D F
32 0 - 7 C, D F
36 0 - 8 C, D, E F
40 0 - 9 C, D, E F
44 0 - A C, D, E F
48 0 - B C, D, E F
Figure 9. System Size Calculator
Use the following chart to calculat the quantity
of 972 and 1374A modules required for differ-
ent sized systems.
HDMI Quantity of
Sources 1374A/972 pairs
4 1
8 3
12 4
16 5
20 8
24 9
28 10
32 11
36 13
40 14
44 15
48 16
972 932 932
980
1372A
Switcher
4 HDMI
Source Inputs
RS-232
HDMI Signals
System Bus
Front Speaker Bus
Identical Group and
Module ID Settings
8 Left/8 Right
Front Speakers
4 AV Inputs
Composite Video Bus
Stereo Audio
HDMI
Front Speaker Bus
955
HDTV
Dedicated
HDMI Receiver
Figure 10. Slave Mode Example System
This system diagram shows how to add HDMI signal switching to an existing Access switching system. The system now has the
capacity to switch digital audio and video signals from the four sources to the dedicated HDMI receiver. PSBs connected to the
955 select the 972 HDMI Source positions as well as the audio and video channels switched by the 955. The maximum product
capacity in Slave Mode is 40 HDMI sources.
Set the 972 to SLAVE mode
Address settings to match the
955’s GROUP and MODULE
ID settings.

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Using 1374 vs. 1374A
The 972 works with the Model 1374A,
but can also work with the previous
version, Model 1374 with some adjust-
ments, depending on the type of RS-232
cable used. Call Audio Authority Techni-
cal Support for details.
Troubleshooting Guide
Symptom Possible Cause
972 Mon lamp is not blinking • Faulty bus connection
PSBs do not respond to Access System • Mode switch is set incorrectly
• Address settings are incorrect
PSBs respond correctly, but HDMI
switch does not respond
• Check outlet and power supply connections to 1394A
• Protocol does not match HDMI switch type (call Audio Authority)
• Pinout jumper incorrect for HDMI switch type
• Bad RS-232 Cable
PSB
GROUP
MODULE MODE
S
M
SYSTEM BUS
RS-232
1
2
3
4FLASH
EXPANSION
TX/RX JUMPER
PROTOCOL
JUMPER