SMART-AVI SKM-04-LT User manual

SKM-04-LT
4-Port KM Switch with USB 2.0 Sharing
USER MANUAL
Designed and Manufactured in the USA
1-800-284-2131
www.smartavi.com

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OVERVIEW
TECHNICAL SPECIFICATIONS_________________________________________________________________
WHAT’S IN THE BOX?_________________________________________________________________________
FRONT AND BACK___________________________________________________________________________
INSTALLATION_______________________________________________________________________________
INITIAL SETUP________________________________________________________________________________
SYSTEM OPERATION_________________________________________________________________________
TROUBLESHOOTING_________________________________________________________________________
TECHNICAL SUPPORT________________________________________________________________________
LIMITED WARRANTY STATEMENT____________________________________________________________
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11
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Technical Specifications
USB
Signal Type USB 2.0, 1.1, and 1.0 w/ internal hub
CPU Ports (4) USB Type B (female)
User Control Interface (2) USB Type-A for keyboard and mouse connecon only;
(2) USB Type-A for USB 2.0 transparent
AUDIO
Input Interface (4) 3.5 mm Stereo Audio
Output Interface (1) 3.5 mm Stereo Audio
CONTROL
Front Panel Buons
RS-232 Via Control @ 115200 bps
Hot Keys Via Keyboard
OSD PASS Technology and Mouse Gesture Switching
OTHER
Power Adapter External 100-240 VAC/5VDC3A @ 24W
Dimensions 12.57” W x 1.76” H x 6.69” D
Weight 4.2 lbs
Approvals UL, CE, ROHS Compliant
Operang Temperature +32 to +104°F (0 to +40°C)
Storage Temperature -4 to 140°F (-20 to +60°C)
Humidity 5 to 90% (No Condensaon)
Emulaon Keyboard and Mouse

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What’s in the box?
FRONT AND BACK
PART NO. Q-TY DESCRIPTION
SKM-04-LT 1 4-Port KM Switch with USB 2.0 Sharing
PS5VDC3A 1 12VDC 3A (minimum) power adapter with center-pin posive polarity.
1 User Manual
SKM-04-LT Back
SKM-04-LT Front

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INSTALLATION
1. Ensure that power is turned o or disconnected from the unit and the computers.
2. Use a USB cable (Type-A to Type-B) to connect a USB port on each computer to the respecve
USB ports of the unit.
3. Oponally connect a stereo audio cable (3.5mm to 3.5mm) to connect the audio output of the
computers to the AUDIO IN ports of the unit.
4. Connect a USB keyboard and mouse in the two USB console ports.
5. Oponally connect stereo speakers to the AUDIO OUT port of the unit.
6. Finally, power on the KM by connecng a 12VDC power supply to the power connector, and then
turn on all the computers.
Note: You can connect up to 4 computers to the 4 port KM.
VIDEO
USB IN
USB K/M OUT
USB 2.0 OUT
USB1 USB2 USB3 USB4 RS232
USB K/M
5VDC2A
SKM-04-LT

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INITIAL SETUP
Absolute Mouse Mode KM Switching
Relative Mouse Mode KM Switching
Aer all devices are connected to the SKM-04-LT, the user must choose a display topology
conguraon and display mode. By default, the SKM-04-LT is congured to a topology with four
screens arranged horizontally starng with Port 1 on the le.
The installaon setup must match one of SKM-04-LT’s predened display topology conguraons.
This can be selected through keyboard hotkey commands. Please refer to the “Display Topology
Conguraon” secon for the available display topologies.
SmartAVI’s new PASS (Progressive Automac Screen Switching) technology allows seamless switching
between computers by moving the mouse cursor from one display to another. With PASS, users can
eortlessly switch computers for faster producvity. PASS only works in Absolute Mouse Mode.
When using computers with mulple displays, SmartAVI developed a new feature called Mouse
Gesture Switching, which is a technology that allows switching between computers using simple
mouse clicks and gestures. No device driver is required. Simply press the scroll wheel twice and then
move the mouse in the direcon of the channel you desire to switch to. This feature only works in
Relave Mouse Mode.
SOURCE 1
SOURCE 3
CURSOR CURSOR
AUTO-SWITCH FROM 4 TO 3
AUTO-SWITCH FROM 1 TO 2
AUTO-SWITCH
FROM 2 TO 4
AUTO-SWITCH
FROM 3 TO 1
SOURCE 2
SOURCE 4
SCROLL 2X THEN
TO THE RIGHT
SCREEN
TO THE LEFT
SCREEN
TO THE UPPER SCREEN
TO THE LOWER SCREEN

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Note: Display Topology species the number of horizontal columns. The number of vercal rows is
calculated in the soware by 4/n columns.
Custom Hotkey Triggers
Users can customize the keys that trigger hotkeys. The default trigger for hotkey funcon on the
keyboard is Ctrl + Ctrl. The trigger funcon can be used to change to the following keys:
Ctrl (Le / Right), Alt, Shi (Le / Right), Caps Lock, Scroll Lock, F1-F12
To view the current hotkey trigger seng:
Use the RS-232 command: /+ /+ ?+ ?+ Enter to view the current hotkey trigger. To reset the Hotkey
Trigger, use the “Factory Defaults” command.
To change the hotkey trigger seng:
[hotkey] + [hotkey] + X+ [desired hotkey]
Example: If the user’s current hotkey trigger is Shi and they want to change it to Scroll Lock, the user
would type Shi + Shi + X+ Scroll Lock.
COMMANDS HOTKEY
Display Topology (mulple rows) [CTRL][CTRL] H [1-4]
Limit Input Ports (one row only) [CTRL][CTRL] W[1-4]
Cursor Rolling (roll past display borders
up, down, le, and right) [CTRL][CTRL] O[0(OFF), 1(ON)]
# STATUS DESCRIPTION
1 OFF Non-selected port
2 ON Selected port
System operation
There are four ways to control the SKM-04-LT: front panel buons, keyboard hotkeys, RS-232 serial
commands, and through the included graphical user interface (GUI).
Front Panel Control
To switch to an input port, simply push the buon on the front-panel of the KM. If an input port is
selected, the LED of that port will turn on.
Front Panel - Port Selecon LEDs:
Hotkey Commands
A Hotkey command is a keyboard sequence used to trigger an acon on the SKM-04-LT via the
keyboard connected to the USB port of the SKM-04-LT. To acvate the hotkey sequence, press the
CTRL key twice and then enter the desired hotkey commands.
Note: All commands can use upper and/or lower case characters.

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System operation (continued)
RS-232 Serial Control
The SKM-04-LT may also be controlled via RS-232 commands. To use these commands, you must use
HyperTerminal or an alternate terminal applicaon. The sengs for the connecon are as follows:
Baudrate 115200; Data Bits 8; Parity None; Stop Bits 1; Flow Control None.
Once you have connected to the SKM-04-LT via Serial, you will see the SKM-04-LT informaon when
the device starts up.
The following commands can be used for RS-232 with available keyboard hotkeys:
Graphical User Interfaces
In addion to the front panel buons, keyboard hotkeys, and RS-232 serial commands described
above, the SKM-04-LT can be congured through a simple GUI that oers all the same customizaon
opons as the other control methods. This interface can be accessed on the connected computers.
COMMAND DESCRIPTION HOTKEY RS-232 COMMAND
Switch All USB [CTRL][CTRL] [port #] [ENTER] //m[port #] [ENTER]
Switch KM Only [CTRL][CTRL] c[port #] [ENTER] //c[port #] [ENTER]
Switch USB Only [CTRL][CTRL] u[port #] [ENTER] //u[port #] [ENTER]
Reset Soware [CTRL][CTRL] r [ENTER] //r[ENTER]
Factory Defaults [CTRL][CTRL] f [ENTER] //f[ENTER]
Get Port Status N/A //?? [ENTER]
Switch resoluon
SKM channel: 1-4
Resoluon:
1 (1080p), 2 (4K), 3 (2K), 4 (720p)
[CTRL][CTRL] ce [SPACE] [SKM #]
[SPACE] [RESOLUTION #]
//ce [SPACE] [SKM #]
[SPACE] [RESOLUTION #]
Mouse control
X and Y axes set in percents
[CTRL][CTRL] mm [SPACE]
[resolution #] [SPACE] [x #]
[y #]
//mm [SPACE]
[resolution #] [SPACE]
[x #] [y #]
Mouse default posion [CTRL][CTRL] rl [ENTER] //rl [ENTER]

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System operation (continued)
Display Topology Conguraon
The SKM-04-LT has a congurable display topology conguraon that can be easily acvated through
keyboard hotkeys. No soware or drivers are required to congure the display topology.
Note: Hotkey CTRL +CTRL command allows for mulple rows.
(1) Hotkey Command: “CTRL +CTRL +H +4 +ENTER”
Limit Input Ports Conguraon
The SKM-04-LT allows the user to shut o input from specic connected computers without the need
to disconnect them from the switch.
Note: Limit Input Ports commands reset the Display Topology conguraon.
Hotkey Commands: CTRL, CTRL W(X) commands (allows one row only):
CTRL +CTRL +W +4 +ENTER
Note: Limit Input Ports commands reset Display Topology conguraon.
CTRL +CTRL +W +3 +ENTER
Note: Port 4 N/A
Note: Port 3, 4 N/A
Note: Port 2-4 N/A
CTRL +CTRL +W +2 +ENTER
CTRL +CTRL +W +1 +ENTER
(2) Hotkey Command: “CTRL +CTRL +H +2 +ENTER”
(3) Hotkey Command: “CTRL +CTRL +H +3 +ENTER”
(4) Hotkey Command: “CTRL +CTRL +H +1 +ENTER”
1 2 3 4
1 2 3 4
1 2
3 4
1 2 3
1
2
3
4
1 2 3
1 2
1

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Resoluon and Mouse Conguraon
System operation (continued)
//CE [SPACE] [SKM #] [SPACE] [resoluon #]
Where SKM channel can be set 1-4
Where Resoluon number is the following:
1. 1080p
2. 4K
3. 2K
4. 720p
For example: //CE 1 2
In this example we are seng channel 1 to reference 4K resoluon.
//MM [SPACE] [resoluon #] [SPACE] [x integer # (1-100)] [y integer # (1-100)]
For example: //MM 2 80 50
In this example we are seng the mouse movement according to 4K resoluon with 80 as the mouse
speed mulitplier for X and 50 as the mouse speed mulplier for Y.
The integer number set for the mouse mulplier will act as a value from 1-100%.
In the example above we are using the following:
80 for X, therefore 80 will become 80% of the mouse movement moving horizontally on the X-axis
50 for Y, therefore 50 will become 50% of the mouse movement moving vercally on the Y-axis
100 will do 100%, 65 will do 65%, 5 will do 5%, etc.
Suppose you move the mouse 100 units for the X axis and 10 units for the Y axis. The soware will
change 100 * 80% = 80 units for the X axis and 10 * 50% = 5 unit for the Y axis. This will cause the
mouse cursor to move slower.
//RL will return the channel’s current mouse mulitplier percentage and the current resoluon which will
reference the resoluon number menoned in the // C E command.
COMMAND DESCRIPTION RS-232 COMMAND
Switch resoluon //ce [SPACE] [SKM #] [SPACE] [resolution #] [ENTER]
Mouse control //mm [SPACE] [resolution #] [SPACE] [x #] [y #] [ENTER]
Mouse default posion //rl [ENTER]

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Troubleshooting
Technical support
No Power
• Make sure that the power adapter is securely connected to the power connector of the unit.
• Check the output voltage of the power supply and make sure that the voltage value is around
12VDC.
• Replace the power supply.
No Video
• Check if all the video cables are connected properly.
• Connect the computer directly to the monitor to verify that your monitor and computer are
funconing properly.
• Restart the computers.
Keyboard is not working
• Check if the keyboard is properly connected to the unit.
• Check if the USB cables connecng the unit and the computers are properly connected.
• Try connecng the USB on the computer to a dierent port.
• Make sure that the keyboard works when directly connected to the computer.
• Replace the keyboard.
Mouse is not working
• Check if the mouse is properly connected to the unit.
• Try connecng the USB on the computer to a dierent port.
• Make sure that the mouse works when directly connected to the computer.
• Replace the mouse.
No Audio
• Check if all the audio cables are connected properly.
• Connect the speakers directly to the computer to verify that the speakers and the computer
audio are funconing properly.
• Check the audio sengs of the computer and verify that the audio output is through the
speakers.
For product inquiries, warranty quesons, or technical quesons, please contact [e-mail].

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Limited warranty statement
A. Extent of limited warranty
SmartAVI, Inc. warrants to the end-user customers that the SmartAVI product specied above will
be free from defects in materials and workmanship for the duraon of 1 year, which duraon begins
on the date of purchase by the customer. Customer is responsible for maintaining proof of date of
purchase.
SmartAVI limited warranty covers only those defects which arise as a result of normal use of the
product, and do not apply to any:
a. Improper or inadequate maintenance or modicaons
b. Operaons outside product specicaons
c. Mechanical abuse and exposure to severe condions
If SmartAVI receives, during applicable warranty period, a noce of defect, SmartAVI will at its
discreon replace or repair defecve product. If SmartAVI is unable to replace or repair defecve
product covered by the SmartAVI warranty within reasonable period of me, SmartAVI shall refund the
cost of the product.
SmartAVI shall have no obligaon to repair, replace or refund unit unl customer returns defecve
product to SmartAVI.
Any replacement product could be new or like new, provided that it has funconality at least equal to
that of the product being replaced.
SmartAVI limited warranty is valid in any country where the covered product is distributed by
SmartAVI.
B. Limitaons of warranty
To the extant allowed by local law, neither SmartAVI nor its third party suppliers make any other
warranty or condion of any kind whether expressed or implied with respect to the SmartAVI product,
and specically disclaim implied warranes or condions of merchantability, sasfactory quality, and
tness for a parcular purpose.
C. Limitaons of liability
To the extent allowed by local law the remedies provided in this warranty statement are the customers
sole and exclusive remedies.
To the extant allowed by local law, except for the obligaons specically set forth in this warranty
statement, in no event will SmartAVI or its third party suppliers be liable for direct, indirect, special,
incidental, or consequenal damages whether based on contract, tort or any other legal theory and
whether advised of the possibility of such damages.
D. Local law
To the extent that this warranty statement is inconsistent with local law, this warranty statement shall
be considered modied to be consistent with such law.

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NOTICE
The informaon contained in this document is subject to change without noce. SmartAVI makes
no warranty of any kind with regard to this material, including but not limited to, implied warranes
of merchantability and tness for parcular purpose. SmartAVI will not be liable for errors contained
herein or for incidental or consequenal damages in connecon with the furnishing, performance or
use of this material. No part of this document may be photocopied, reproduced, or translated into
another language without prior wrien consent from SmartAVI, Inc.
20180109
Tel: [phone] • [phone]
2455 W Cheyenne Ave, Suite 112
North Las Vegas, NV 89032
www.smartavi.com
Designed and Manufactured in the USA