Leaf Leaf True LT88 User manual

8X 8 Video Matrix Systems
LT88
LT88E

Leaf LT88 / LT88E manual
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Document Status
Client:
Nexus
Status:
Controlled external release
Authorised by:
AFG
Comment Closure Date:
Revision History
Version
Date
Changes
1
10/08/11
Initial release
2
23/11/11
Revised
3
9/12/11
Added content
4
23/02/12
Added content
5
16/05/12
Added content
6
26/9/12
Vary text
7
26/05/14
Product name change
NOTE:
During initial set up and during any changes to the
installation, please switch off and unplug mains power
(from this system and any equipment that is to be
connected to it) prior to connecting any leads / cables.
Plug in and switch power back on again after all
interconnection leads are in place.
Do not run HDBaseT / Zone Cat5e/6 cabling with or in
close parallel proximity to mains power cables.
Do not connect any part of this equipment to Power
Over Ethernet devices. Damage may result.
During operation the Leaf LT88 / LT88E and
associated LTB1 / LTB1E breakouts may feel quite hot
to the touch. This is normal. Please ensure that these
items have sufficient cool air flow around them.

Leaf LT88 / LT88E manual
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Table of Contents
1INTRODUCING THE LEAF TRUE VIDEO MATRIX SYSTEM....................4
1.1 Overview...........................................................................................................................4
2FRONT PANEL LAYOUT............................................................................5
2.1 HDBase T Connections...................................................................................................6
2.2 Ethernet Ports..................................................................................................................6
2.3 Front Panel LED display and selection buttons...........................................................6
3REAR PANEL LAYOUT:.............................................................................7
3.1 RJ12 control port.............................................................................................................8
3.2 4 way DIP switch module................................................................................................8
3.3 Digital Coax (S/PDIF) audio inputs:...............................................................................8
3.4 Stereo RCA analog outputs............................................................................................8
3.5 3.5mm IR ports.................................................................................................................9
3.6 RJ45 type “RS232 through” ports.................................................................................9
3.7 4 pin DIN power connector...........................................................................................10
3.8 RS232 Serial Control connectors ................................................................................10
3.8.1 Single LT88/E use...................................................................................................10
3.8.2 Multiple LT88/E use.................................................................................................10
3.9 Bank Select Switch........................................................................................................11
3.10 RS232 Termination (TERM) Switch..............................................................................11
3.11 HDMI Input ports............................................................................................................11
4BREAKOUTS............................................................................................12
4.1 Local Power ...................................................................................................................12
4.2 Mounting Bracket ..........................................................................................................12
4.3 Status LEDs ...................................................................................................................13
5SYSTEM FEATURES................................................................................14
5.1 EDID Management.........................................................................................................14
5.2 Calibration......................................................................................................................14
5.3 Exclusive Source Selection (Zone Lock mode) .........................................................14
5.4 Audio Only Source ........................................................................................................15
5.5 Flexible Audio Routing .................................................................................................15
5.6 Audio Sync Delay..........................................................................................................15
6OPERATION .............................................................................................16
6.1 Apply Power...................................................................................................................16
6.2 Calibration......................................................................................................................16
6.3 Creating input to output switched selections ............................................................17
6.4 Clear all switched selections / Global OFF.................................................................18
7INTERCONNECTIONS..............................................................................19
7.1 Possible interconnections at front panel....................................................................19
7.2 Possible interconnections at rear panel .....................................................................19
7.3 Possible interconnections at LTB1E...........................................................................20

Leaf LT88 / LT88E manual
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1 Introducing the Leaf True Video Matrix system
1.1 Overview
The Leaf True HDMI Matrix System comprises a Leaf LT88 or LT88E interface unit and
Leaf LTB1 or LTB1E breakouts. The Leaf True Video Matrix system is designed to
accept HDMI A/V sources at its inputs and route them to remotely located breakouts. In
this document, each input signal source is termed a source and each output and
breakout is called a zone.
Additional features include infrared (IR) control through feed and RS232 through feed
capability between the interface and breakouts. Note that these are through feeds only
and have no direct control function of the Leaf True system.
There are 2 model variants:
LT88 interface with LTB1 breakouts and
LT88E interface with LTB1E breakouts.
Whilst both model variants provide the routing and control features, the LT88E extends
this by providing Ethernet through feed capability. The LT88E has additional circuitry
and dedicated RJ45 type ports on its front panel that connect to matching Ethernet
ports at LTB1E breakouts.
Interconnection between a Leaf True interface and associated Leaf True breakouts is
via one single cat5e/6 cable for each breakout. Single cat5e /6 cable interconnect
between these components is made possible through the use of HDBaseT technology.
This technology enables Video and Audio, as well as Ethernet, IR, and RS232 through
feed to be all sent by a single cable per zone over large distances.
Cabling specifications and information can be found in supplementary documentation.
The Leaf True system is designed to be controlled via RS232 commands from 3rd party
control systems. Control of basic switching functions can be (also or instead) achieved
via a proprietary Leaf controller such as the Leaf TC3 connected by 6 wire Telco cable
and RJ12 (6P6C) modular connectors.
Leaf True LT88
Leaf True LTB1
Leaf True LTB1E
Leaf True LT88E

Leaf LT88 / LT88E manual
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Manual control of the basic switching functions can be also be achieved by the use of
front panel mounted buttons on the LT88 / LT88E. See 6.3 - 6.4 for details A
corresponding set of display LEDs provide user feedback of the signal routing.
Both the LT88 and the LT88E are built into 2RU rack-mountable metal housings and
are provided with rubber feet should table / desktop mounting be preferred.
2 Front Panel Layout
The LT88 and LT88E front panels are fitted with connectors, visual indicators and
control buttons as depicted below.
1. 8 x HDBase T RJ45 type ports labelled HDBaseT outputs for connection to the
zone breakouts (LTB1 /LTB1E)
2. 16 x LED indicators as 2 rows of 8
3. 2 x press button switches
4. 8 x ethernet RJ45 type ports for connection of optional ethernet equipment
(LT88E only)
2
1
3
3
LT88 front panel
4
LT88E front panel

Leaf LT88 / LT88E manual
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2.1 HDBase T Connections
Each Leaf True breakout is connected to the interface by way of a single Cat5e/6 cable
to the HDBaseT output or zone ports across the lower part of the front panel.
2.2 Ethernet Ports
The Ethernet ports across the upper part of the front panel of LT88E are for optional
connection of Ethernet facilities for direct routing to remote Ethernet ports at each
LTB1E breakout.
The Ethernet connection is 100Base-T full duplex. An external Ethernet router / switch
may be added for added flexibility and performance.
The Orange LED on the Ethernet ports indicate handshake between the LT88E and
host Ethernet devices to which it is connected, but does not necessarily indicate data
flow from end to end.
2.3 Front Panel LED display and selection buttons
16 multi colour (green / cyan / blue) Light Emitting Diodes (LEDs) and 2 press button
switches are fitted at the right hand end of the front panel.
The LEDS are arranged in two rows of 8.
The upper row relating to the input sources 1 to 8 from left to right.
The lower row relates to the output zones 1 to 8 from left to right.
Green LEDS indicate actively switched inputs and outputs.
Cyan LEDs indicate exclusive source (zone lock) switched inputs and outputs.
Blue LEDs indicate a switching function or a supervisory function in progress.
Left press button switch
Right press button switch

Leaf LT88 / LT88E manual
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The 2 press buttons can be used for manual source to zone selections and other
special functions.
See sections 6.2 to 6.4 for further information on the LEDs and press button switches.
3 Rear panel layout:
The LT88 and LT88E rear panels have the following fittings as depicted below.
1. 1 x RJ12 type Leaf Control input port
2. 1 x 4 way Dip Switch module
3. 8 x RCA S/PDIF (digital coax) audio input sockets
4. 8 x pairs of RCA line level stereo output sockets
5. 8 x 3.5mm Tip Ring Sleeve sockets for connection of IR devices
6. 8 x RJ45 type RS232 serial data ports
7. 1 x 4 pin DIN Power connector receptacle
8. 1 x RS232 serial control input connector
9. 1 x RS232 serial control out connector
10.1 x 16 position rotary Bank Select switch
11.1 x RS232 Terminate switch
12.8 x HDMI Input or source ports.
12
11
2
1
3
4
5
6
7
8
9
10

Leaf LT88 / LT88E manual
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3.1 RJ12 control port
The 6 wire RJ12 port enables the LT88/E to be controlled by a proprietary LEAF
controller such as the TC3.
3.2 4 way DIP switch module
The rear panel accessible 4 position DIP switch controls functionality of the LT88/E.
The table below summarizes the settings:
NOTE: The interface will only read the DIP switch settings on power-up. The unit must
be powered off and then back on again for it to respond to any change of the DIP
switch settings.
DIP SWITCH
OFF (down)
ON (up)
1
Global IR direction IN
IR RX detectors at LTB1/E
breakouts
IR TX blasters at LT88/E
Global IR direction OUT
IR RX detectors or devices at
LT88/E
IR TX blasters at LTB1/E breakouts
2
IR Input device type
(Applies when DIP 1 =ON)
IR RX detectors (e.g. Leaf
Hammerhead) at
LT88/E
IR Input device type
(Applies when DIP 1 =ON)
IR direct drive from control system*
(5 volt only) at LT88/E
*Must connect IR IN with a stereo
(tip,ring,sleeve) plug at the Leaf end
with the ring floating / not connected
or with the ring connected to tip.
3
Normal Mode
Compatibility Mode
4
Future Function
Future Function
Table 1: Dip Switch Settings
3.3 Digital Coax (S/PDIF) audio inputs:
The upper row of RCA sockets 1 to 8 are configured as digital coax (S/PDIF) stereo
audio input ports. They can be used as either alternative audio inputs (selectable with
discrete Audio Only commands) or the input points for audio only sources.
3.4 Stereo RCA analog outputs
The lower 2 rows of RCA sockets 1-8 are configured as stereo analog audio outputs
for connection to local devices such as centralised external amplifiers.
The source audio for these outputs can be either an HDMI input source, digital coax
(S/PDIF) stereo connector input or audio return from a zone breakout input.
The RCA outputs maybe routed manually or automatically (the default).
With automatic routing active, the RCA audio outputs will follow the zone audio output
of the same number. (example: If zone 4 is selected to source 2, then in automatic
mode the RCA audio will also come from source 2).

Leaf LT88 / LT88E manual
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When a manual RCA audio output routing command is sent it will override this
automatic function for that output. When this output is switched off using a manual
audio command, automatic mode will be re-activated for that output.
Selectable audio sync delay is also available independently on these audio output ports
(ref: Audio Sync Delay).
3.5 3.5mm IR ports
The 3.5mm Remote IR connectors are used for routing external IR control signals in
one direction between the LT88 / LT88E and the connected LTB1 / LTB1E breakouts.
These connections are treated as through connections. That is, IR port 1 connects to
the breakout connected to Zone 1, through to port 8 being connected to the breakout at
Zone 8.
The IR ports support direct connection and drive of Leaf “hammerhead” and other
compatible 5 volt, 3 wire (Tip Ring Sleeve / stereo plug) IR detectors to Leaf LB41 and
other compatible 2 wire (mono plug) IR blasters.
The system wide operating direction of the IR detectors and blasters (either Hub to
Zones or Zones to Hub) is configurable by DIP Switch 1.
If the IR Direction is set to “Hub to Zones” by DIP switch 1, the IR ports on the LT88 /
LT88E can be further configured by DIP Switch 2 to accept direct IR drive from an
external control system or similar instead of stand-alone IR detectors.
For this configuration, Stereo (Tip Ring Sleeve) 3.5mm leads must be used instead of
Mono leads for the IR interconnections from the control system to the Leaf
LT88/LTMI88E. The “Ring” connection of these leads at the LT88/LTMI88E end (or
both ends) must be left “floating” / not connected.
(See table 2 for DIP switch configuration details.)
If the IR input type is set to IR RX detector (DIP Switch 2 OFF/down):
then the IR output will be automatically modulated at 38Khz.
If the IR input type is set to IR direct drive (DIP switch 1:ON/up & DIP switch 2 ON/up):
then the received IR input will be directly passed through to the IR output.
Any external IR drive voltage should not exceed 5V.
3.6 RJ45 type “RS232 through” ports
The LEAF True system provides a bi-directional, full duplex “RS232 through” capability
between the LT88/LT88E and each of the connected LTB1/LTB1E Breakouts through
specific RJ45 connectors. These are for optional use by external RS232 equipment.
Connection from these ports to RS232 equipment would typically be achieved through
the use of RJ45 to DB9 RS232 adaptor leads. Leaf Audio has suitable RJ45 to RS232
(DB9) Female adaptor leads (LT45DB9Female)available for sale. Male DB9 RS232
connection may require the additional of M-M gender bender(s).
For convenience the pinouts of the RJ45 type “RS232 through” ports is shown below.
RJ45 type “RS232 Through” port(s)
receptacle (Front view)
At LT88 /LT88E E
At LTB1 / LTB1E (Breakouts)

Leaf LT88 / LT88E manual
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3.7 4 pin DIN power connector
The LT88/E requires 4 Pin 12V power.
WARNING. Failure to use the correct power supply as provided by Leaf Audio
may result in incorrect operation and / or damage to the Leaf True Matrix system.
The power supply is fitted with a locking connector. Be sure to slide back the
locking sleeve on the plug before attempting to connect or disconnect it at the
LT88/E. The correct connector orientation for these models is “Flat Side down”.
3.8 RS232 Serial Control connectors
The unit can be controlled by serial commands through the RS232 input port. Typically
this would be connected to a control system with a straight through DB9 Male to
Female RS232 lead. Some control systems may require only the TxD, RxD and Gnd
wires of an RS232 lead to be connected. The pin configurations of these 3 connections
on the DB9 plug is: TxD = Pin 2, RxD = Pin3, Gnd = Pin5.
3.8.1 Single LT88/E use
The RS232 Input port is used for controlling the unit.
The TERM (Termination) switch (ref: para 3.10) must be set to ON (Up).
3.8.2 Multiple LT88/E use
Multiple units can be chained together and addressed on the same RS232 link
by connecting the RS232 thru (out) port on one unit to the RS232 input port of
the next unit.
The last unit in the chain must have the TERM (Termination) switch (ref:para 3.10)
set to ON (Up), while all other units in the chain must have this switch set to OFF
(Down). The RS232 Input port is used for controlling the units.
Spring loaded
locking sleeve
Slide back to
release
Flat side