Kramer VS-48HDxl User manual

Kramer Electronics, Ltd.
USER MANUAL



Model:
VS-48HDxl
3G HD/SD SDI 4x8 Matrix Switcher
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Contents
i
Contents
1 Introduction 1
2 Getting Started 1
2.1 Quick Start 1
3 Overview 3
4 Your VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher 4
4.1 Using the IR Transmitter 8
5 Installing the VS-48HDxl in a Rack 9
6 Connecting the VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher 10
6.1 Connecting the VS-48HDxl in the Dual-Link Mode 12
6.2 Working Mode Setting 13
6.3 Dipswitch Settings 14
6.3.1 Setting the Setup Dipswitches 14
6.4 Controlling via RS-232 (for example, using a PC) 15
6.5 Controlling via the RS-485 Port 16
6.6 Factory Reset 16
6.7 Switching Genlocked Video Signals 17
6.8 Controlling via ETHERNET 17
6.8.1 Connecting the ETHERNET Port directly to a PC (Crossover Cable) 17
6.8.2 Connecting the ETHERNET Port via a Network Hub (Straight-Through Cable) 19
6.8.3 Configuring the Ethernet Port 19
6.9 Controlling via the REMOTE Connector 19
7 Operating the VS-48HDxl 20
7.1 Switching OUT-IN Combinations 20
7.1.1 Switch OUT-IN Combinations 20
7.1.2 Switch OUT-IN Combinations in the Dual-Link Mode 21
7.2 Confirming Settings 21
7.2.1 Toggling between the AT ONCE and CONFIRM Modes 22
7.2.2 Confirming a Switching Action 22
7.3 Storing/Recalling Input/Output Configurations 22
7.3.1 Storing an Input/Output Configuration 22
7.3.2 Recalling an Input/Output Configuration 23
7.4 Locking the Front Panel 23
8 Technical Specifications 24
9 Table of Hex Codes for Serial Communication 24
10 Kramer Protocol 2000 25
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Contents
ii
Figures
Figure 1: VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher 5
Figure 2: Connecting the VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher 11
Figure 3: Connecting the Dual-Link VS-48HDxl 3G HD/SD-SDI 4x8 Matrix Switcher 13
Figure 4: VS-48HDxl SETUP Dipswitches 14
Figure 5: Connecting a PC without using a Null-modem Adapter 15
Figure 6: Controlling via RS-485 (for example, using an RC-3000) 16
Figure 7: Local Area Connection Properties Window 18
Figure 8: Internet Protocol (TCP/IP) Properties Window 18
Figure 9: Using the Remote Connector 19
Tables
Table 1: Front Panel VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher 6
Table 2: Rear Panel VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher 7
Table 3: Machine # Dipswitch Settings 14
Table 4: Technical Specifications of the VS-48HDxl 24
Table 5: VS-48HDxl Hex Codes for Switching via RS-232/RS-485 24
Table 6: Protocol Definitions 25
Table 7: Instruction Codes for Protocol 2000 26
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Introduction
1
1 Introduction
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been
providing a world of unique, creative, and affordable solutions to the vast
range of problems that confront the video, audio, presentation, and
broadcasting professional on a daily basis. In recent years, we have redesigned
and upgraded most of our line, making the best even better! Our 1,000-plus
different models now appear in 11 groups
1
that are clearly defined by
function.
Congratulations on purchasing your Kramer VS-48HDxl 3G HD/SD SDI 4x8
Matrix Switcher. This product is ideal for:
Broadcasting and production studios
Presentation applications
The package includes the following items:
VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher
Power cord
2
Null-modem adapter and infrared remote control transmitter
This user manual
3
2 Getting Started
We recommend that you:
Unpack the equipment carefully and save the original box and packaging
materials for possible future shipment
Review the contents of this user manual
Use Kramer high-performance high-resolution cables
4
2.1 Quick Start
This quick start chart summarizes the basic setup and operation steps.
1 GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Matrix Switchers; GROUP 3: Control Systems;
GROUP 4: Format/Standards Converters; GROUP 5: Range Extenders and Repeaters; GROUP 6: Specialty AV Products;
GROUP 7: Scan Converters and Scalers; GROUP 8: Cables and Connectors; GROUP 9: Room Connectivity;
GROUP 10: Accessories and Rack Adapters; GROUP 11: Sierra Products
2 We recommend that you use only the power cord supplied with this device
3 Download up-to-date Kramer user manuals from the Internet at this URL: http://www.kramerelectronics.com
4 The complete list of Kramer cables is on our Web site at http://www.kramerelectronics.com
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Getting Started
2
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Overview
3
3 Overview
The Kramer VS-48HDxl can be used as a high-performance 4x8 matrix
switcher or as a dual-link 2x4 switcher, which lets you simultaneously route
any of the inputs to any or all of the outputs for all SDI video signals, using
BNC connectors.
In particular, the VS-48HDxl features:
Cable equalization up to 350m for SD
1
signals, 140m for 1.5GHz HD
2
signals, and 120m for 3GHz HD signals
Operation of up to 2.97Gbps – enabling it to be used for standard
definition, high definition and the new 3G high definition serial digital
video signals (SD/HD-SDI)
SMPTE 259M, 292M and 424M and 372M (for dual-link HD-SDI
signals) compliance and support for data rates of 270Mbps, 1483.5Mbps,
1485Mbps and 2970Mbps
Reclocking and equalization on each input, storing and recalling setups,
and a TAKE button for the execution of multiple switches all at once
Selector buttons that automatically light up in different colors—green,
when the VS-48HDxl detects a ‘standard definition’ signal, or blue, when
it detects a ‘high definition’ signal
The ability to switch genlocked video signals according to timing of the
GENLOCK reference input. Switching according to the Bi-level or Tri-
level Genlock input according to SMPTE RP-168
3
The VS-48HDxl is housed in a 19" 1U rack-mountable enclosure, and is fed
from a 100-240 VAC universal switching power supply. The unit can be
controlled via the front panel buttons or via:
An infrared remote control transmitter
An infrared remote extension cable transmitter
Remotely, by RS-232 or RS-485 serial commands transmitted by a PC,
touch screen system, or other serial controller
The ETHERNET
Remote contact closure for forced operation
1 Standard Definition (SD) means an NTSC or PAL compatible video format, consisting of 480 (for NTSC) or 576 (for PAL)
lines of interlaced video
2 High Definition (HD) means a video format, consisting of 720 active lines of progressive video or 1080 lines of progressive
or interlaced video
3 The sources must be genlocked to the GENLOCK input in order to switch cleanly
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4
To achieve the best performance:
Connect only good quality connection cables, thus avoiding interference,
deterioration in signal quality due to poor matching, and elevated noise
levels (often associated with low quality cables)
Avoid interference from neighboring electrical appliances that may
adversely influence signal quality and position your Kramer VS-48HDxl
from moisture, excessive sunlight and dust
4 Your VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher
Figure 1, Table 1, and Table 2 define the VS-48HDxl 3G HD/SD SDI 4x8
Matrix Switcher.
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Your VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher
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Figure 1: VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher
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Table 1: Front Panel VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher
#Feature Function
1 IR Receiver The red LED is illuminated when receiving signals from the Infrared
remote control transmitter
2POWER Switch Illuminated switch for turning the unit ON or OFF
3OUTPUT (DUAL LINK)
Selector Buttons
Select the output to which the input is switched (from 1 to 8)
In the dual-link mode, select the output DUAL LINK 1 to DUAL LINK 4
to which the input is switched
4 INPUT (DUAL LINK)
Selector Buttons
Select the input to switch to the output (from 1 to 4)
In the dual-link mode, select input DUAL LINK 1 or DUAL LINK 2 to
switch to the outputs
Press IN buttons 1, 2 and 3 simultaneously to reset the machine to its
factory default values1(see section 6.6)
Use to set the resolution when switching genlocked video signals (see
section 6.7)
5 STO (STORE) Button Pressing STO followed by an INPUT / OUTPUT button stores the
current setting2
6TAKE Button Pressing TAKE toggles the mode between the CONFIRM mode3and
the AT ONCE mode (user confirmation per action is unnecessary).
When in CONFIRM mode, the TAKE button implements a pending
operation4
7ALL Button Pressing ALL followed by an INPUT button, connects that input to all
outputs5
8 RCL (RECALL) Button Pressing the RCL button and the corresponding INPUT / OUTPUT key
displays a setup from the non-volatile memory. After pressing the same
memory location the second time, the settings will take effect
9 OFF Button An OFF-OUT combination disconnects that output from the inputs; an
OFF-ALL combination disconnects all the outputs
Press and hold6to toggle between the 4xswitcher mode and the
dual-link 2x4 switcher mode
10 LOCK Button Disengages/engages the front panel buttons
11 7-segment Display Displays the selected input switched to the output (marked above each
input)
1 The 7-segment display shows 12341234, indicating that the operation mode is normal, and that the setups stored via the
INPUT/OUTPUT buttons have been erased
2 For example, press STO and then the Output button # 3 to store in Setup # 3
3 When in Confirm mode, the TAKE button illuminates
4 See section 7.2
5 For example, press ALL and then Input button # 2 to connect input # 2 to all the outputs
6 For more than 3 seconds
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Table 2: Rear Panel VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher
#Feature Function
12 GENLOCK BNC Connector Connect to the Genlock source
13 TERM 75
 Button Press to terminate the Genlock source (75) or release for looping1
14 LOOP BNC Connector Connect to the GENLOCK connector of the next unit in the line
15 DUAL LINK INPUT BNC
Connectors
In the dual-link mode, connect the source to inputs 1 and 2 and/or inputs 3
and 4 (DUAL LINK 1 and/or DUAL LINK 2)
16 INPUT BNC Connectors Connect to the serial digital video sources (from 1 to 4)
17 DUAL LINK OUTPUT BNC
Connectors
In the dual-link mode, connect the acceptors to outputs 1 and 2 and/or
outputs 3 and 4 and/or outputs 5 and 6 and/or outputs 7 and 8 (DUAL
LINK 1 and/or DUAL LINK 2 and/or DUAL LINK 3 and/or DUAL LINK 4,
respectively)
18 OUTPUT BNC Connectors Connect to the serial digital video acceptors (from 1 to 8)
19 RS-232 9-pin D-sub Port Connects to the PC or the Remote Controller
20 RESET Button Press to reset Ethernet to factory default definitions2:
IP number 192.168.1.39
Mask – 255.255.255.0
Gateway – 192.168.1.1
21 ETHERNET RJ-45 Connector
Connects to the PC or other Serial Controller through computer networking
22 REMOTE INPUT Terminal
Block Connectors
Connect to dry contact switches3(from 1 to 4)
23 REMOTE OUTPUT
Terminal Block Connectors
Connect to dry contact switches (from 1 to 8)
24 RS-485 Detachable
Terminal Block Port
Pin G is for the Ground connection4; pins B (-) and A (+) are for RS-485
25 REMOTE IR Opening5Connects to an external IR receiver unit for controlling the machine via an
IR remote controller (instead of using the front panel IR receiver)6
26 SETUP Dipswitches Dipswitches for setup of the unit
27 Power Connector with Fuse AC connector enabling power supply to the unit
1 Push in to terminate the input. Release when the input extends to another unit
2 First disconnect the power cord and then connect it again while pressing the ETH Factory Reset button. The unit will power
up and load its memory with the factory default definitions
3 See section 6.9
4 The ground connection is sometimes connected to the shield of the RS-485 cable. In most applications, the ground is not
connected
5 Covered by a cap. The 3.5mm connector at the end of the internal IR connection cable fits through this opening
6 Optional. Can be used instead of the front panel (built-in) IR receiver to remotely control the machine (only if the internal
IR connection cable has been installed)
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4.1 Using the IR Transmitter
You can use the RC-IR2 IR transmitter to control the machine via the built-in
IR receiver on the front panel or, instead, via an optional external IR receiver
1
.
The external IR receiver can be located 15 meters away from the machine.
This distance can be extended to up to 60 meters when used with three
extension cables
2
.
Before using the external IR receiver, be sure to arrange for your Kramer
dealer to insert the internal IR connection cable
3
with the 3.5mm connector
that fits into the REMOTE IR opening on the rear panel.
Connect the external IRreceiver to the REMOTE IR 3.5mm connector.
1 Model: C-A35M/IRR-50
2 Model: C-A35M/A35F-50
3 P/N: 505-70434010-S
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Installing the VS-48HDxl in a Rack
9
5 Installing the VS-48HDxl in a Rack
This section describes how to install the VS-48HDxl in a rack.
Before Installing in a rack How to Rack Mount
Before installing in a rack, be sure that the environment is
within the recommended range:
Operating temperature range +5º to +45º C (41º to 113º F)
Operating humidity range 10 to 90% RHL, non-condensing
Storage temperature range -20º to +70º C (-4º to 158º F)
Storage humidity range 5 to 95% RHL, non-condensing

CAUTION!!
When installing on a 19" rack, avoid hazards by taking
care that:
1. It is located within the recommended environmental
conditions, as the operating ambient temperature of a
closed or multi unit rack assembly may exceed the
room ambient temperature.
2. Once rack mounted, enough air will still flow around
the machine.
3. The machine is placed straight in the correct
horizontal position.
4. You do not overload the circuit(s). When connecting
the machine to the supply circuit, overloading the
circuits might have a detrimental effect on overcurrent
protection and supply wiring. Refer to the appropriate
nameplate ratings for information. For example, for
fuse replacement, see the value printed on the
product label.
5. The machine is earthed (grounded) in a reliable way
and is connected only to an electricity socket with
grounding. Pay particular attention to situations where
electricity is supplied indirectly (when the power cord
is not plugged directly into the socket in the wall), for
example, when using an extension cable or a power
strip, and that you use only the power cord that is
supplied with the machine.
To rack-mount a machine:
1. Attach both ear brackets to the
machine. To do so, remove the
screws from each side of the
machine (3 on each side), and
replace those screws through the
ear brackets.
2. Place the ears of the machine
against the rack rails, and insert the
proper screws (not provided)
through each of the four holes in the
rack ears.
Note that:
In some models, the front panel
may feature built-in rack ears
Detachable rack ears can be
removed for desktop use
Always mount the machine in the
rack before you attach any cables
or connect the machine to the
power
If you are using a Kramer rack
adapter kit (for a machine that is not
19"), see the Rack Adapters user
manual for installation instructions
(you can download it at:
http://www.kramerelectronics.com)
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Connecting the VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher
10
6 Connecting the VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher
To connect the VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher, as
illustrated in the example in Figure 2, do the following
1
:
1. Connect up to four SDI sources to the SDI INPUT BNC connectors (for
example, an HD/SD SDI camera to input 1 and a 3G HD video server to
input 4).
2. Connect the SDI OUTPUT BNC connectors to up to
2
eight SDI acceptors
(for example, output 1 to a Preview display, and output 8 to an HD SDI
mixer).
3. Set the dipswitches (see section 6.3).
4. If required
3
, connect:
A Genlock source to the GENLOCK BNC connector
The LOOP BNC connector to the GENLOCK connector of the next
unit in the line, and release the TERM button for looping
4
5. Connect a PC and/or controller (if required), to the:
RS-232 port (see section 6.4), and/or
RS-485 port (see section 6.5), and/or
ETHERNET connector (see section 6.6)
6. If required
3
, connect a remote dry contact switch (refer to section 6.9).
7. Connect
3
the power cord
5
.
1 Switch OFF the power on each device before connecting it to your VS-48HDxl. After connecting your VS-48HDxl, switch
on its power and then switch on the power on each device
2 When only one output is required, connect that output, and leave the other outputs unconnected
3 Not illustrated in Figure 2
4 Pushed in terminates the input. Release when the input extends to another unit
5 We recommend that you use only the power cord that is supplied with this machine
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Connecting the VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher
11
Figure 2: Connecting the VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher
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6.1 Connecting the VS-48HDxl in the Dual-Link Mode
You can use your VS-48HDxl in the dual-link mode to switch any of the two
dual-link SDI inputs to any or all of the four dual-link SDI outputs, as the
illustration in Figure 3 shows.
To connect the VS-48HDxl 3G HD/SD-SDI 4x4 Matrix Switcher in the dual-
link mode, do the following
1
:
1. Connect one or both of the SDI sources to the INPUT DUAL LINK BNC
connectors. For example, a dual-link HD/SD SDI camera to DUAL LINK 1
(inputs 1 and 2) and a dual-link 3G HD video server to DUAL LINK 2
(inputs 3 and 4).
2. Connect the SDI OUTPUT BNC connectors to up to four
2
SDI acceptors. For
example, OUTPUT DUAL LINK 1 (outputs 1 and 2) to a dual-link preview
display, and OUTPUT DUAL LINK 4 (outputs 7 and 8) to a dual-link HD
SDI mixer.
3. Set the dipswitches (see section 6.3).
4. If required
3
, connect:
A Genlock source to the GENLOCK BNC connector
The LOOP BNC connector to the GENLOCK connector of the next
unit in the line, and release the TERM button for looping
4
5. Connect a PC and/or controller (if required), to the:
RS-232 port (see section 6.4), and/or
RS-485 port (see section 6.5), and/or
ETHERNET connector (see section 6.6)
6. If required
3
, connect a remote dry contact switch (refer to section 6.9).
7. Connect
3
the power cord
5
.
8. Set the machine to the dual-link mode (see section 6.2).
1 Switch OFF the power on each device before connecting it to your VS-48HDxl. After connecting your VS-48HDxl, switch
on its power and then switch on the power on each device
2 When only one output is required, connect that output, and leave the other output unconnected
3 Not illustrated in Figure 2
4 Pushed in terminates the input. Release when the input extends to another unit
5 We recommend that you use only the power cord that is supplied with this machine
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Connecting the VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher
13
Figure 3: Connecting the Dual-Link VS-48HDxl 3G HD/SD-SDI 4x8 Matrix Switcher
6.2 Working Mode Setting
You can set the VS-48HDxl to work in the dual-link mode as follows:
To switch to the dual-link mode, press and hold the OFF front panel
button for 3 seconds until a red dot illuminates on the display (on the
fourth segment of the 7-segment display) and the OFF button blinks
To exit the dual-link mode, press and hold the OFF front panel button for
3 seconds until the red dot on the display disappears and the OFF button
blinks
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14
6.3 Dipswitch Settings
By default, all dipswitches are set to OFF.
Figure 4 illustrates the VS-48HDxl dipswitches:
Figure 4: VS-48HDxl SETUP Dipswitches
6.3.1 Setting the Setup Dipswitches
The setup dipswitches determine the address of each VS-48HDxl unit when
several VS-48HDxl units are connected to a PC or serial controller. Set the
address of the unit using the SETUP dipswitches 1, 2, 3 and 4, according to
Table 3.
When using a standalone VS-48HDxl unit, set the address to 1.
When connecting more than one VS-48HDxl unit, set the address of the first
machine (the Master) that is closest to the PC, to 1 (dipswitches are set to
OFF). Each additional VS-48HDxl unit must have a unique address.
Table 3: Machine # Dipswitch Settings
Address DIP 1 DIP 2 DIP 3 DIP 4
1 (default)
OFF OFF OFF OFF
2OFF OFF OFF ON
3 OFF OFF ON OFF
4OFF OFF ON ON
5 OFF ON OFF OFF
6OFF ON OFF ON
7 OFF ON ON OFF
8OFF ON ON ON
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Connecting the VS-48HDxl 3G HD/SD SDI 4x8 Matrix Switcher
15
6.4 Controlling via RS-232 (for example, using a PC)
To connect a PC to the VS-48HDxl unit, using the Null-modem adapter
provided with the machine (recommended):
Connect the RS-232 9-pin D-sub rear panel port on the VS-48HDxl unit to
the Null-modem adapter and connect the Null-modem adapter with a
9-wire flat cable to the RS-232 9-pin D-sub port on your PC
To connect a PC to the VS-48HDxl unit, without using a Null-modem
adapter:
Connect the RS-232 9-pin D-sub port on your PC to the RS-232 9-pin
D-sub rear panel port on the VS-48HDxl unit, as Figure 5 illustrates



9-pin D-sub
(From PC)
9-pin D-sub
(Male)
If a shielded cable is used, connect the shield to PIN 5
PIN 4 is connected to PIN 6
PINs 8, 7, 1 are connected together



PIN 5 Connected to PIN 5 (Ground)
PIN 3 Connected to PIN 2
PIN 2 Connected to PIN 3
Figure 5: Connecting a PC without using a Null-modem Adapter
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16
6.5 Controlling via the RS-485 Port
To cascade up to eight individual VS-48HDxl units, via RS-485 (with control
via a Master Programmable Remote Control system such as the Kramer
RC-3000), as Figure 6 illustrates, do the following:
1. Connect the “A” (+) and “B” (-) PINS on the RS-485 terminal block port of
the RC-3000 to the “A” (+) and “B” (-) PINS, respectively, on each of the
eight VS-48HDxl units. (If using shielded twisted pair cable, the shield is
usually connected to the “G” (Ground) PIN of the first unit).
2. Set the first VS-48HDxl unit as MACHINE # 1 and the following seven
VS-48HDxl units as MACHINE # 2 to MACHINE # 8, according to
Table 3.
MACHINE # 1
MACHINE # 8
KEYBOARD EXTENSION REMOTE CONTACT RS-485
RS-232 IN RS-232 OUT
12 VDC
1 2 1 2 3 4 5 6 7 8 G 4 6 8 103 5 7 9 11 12 14 1 6
OUT
13 15
IN

RS-485 PINOUT
B
G
A
_
+
Figure 6: Controlling via RS-485 (for example, using an RC-3000)
6.6 Factory Reset
Press and hold the input buttons 1, 2 and 3 simultaneously for 3 seconds until
the three buttons flash to reset the machine to its default values.
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17
6.7 Switching Genlocked Video Signals
The genlock feature lets you switch genlocked video signals according to
timing of the GENLOCK reference input
1
.
Connect the GENLOCK cable.
If the HD input signal
2
that is connected is one of the following, it is necessary
to set it up as follows:
1080i@60Hz: press and hold INPUT 1 button for 3 seconds. The
button will flash
3
to indicate that the set up was completed
1080i@50Hz or 720p@50Hz: press and hold INPUT 2 button for 3
seconds.
The button will flash
3
to indicate that the set up was completed
720p@60Hz: press and hold INPUT 3 button for 3 seconds.
The button will flash
3
to indicate that the set up was completed
When turning the machine ON, the appropriate button will flash to indicate
the latest setup (last setup is saved).
6.8 Controlling via ETHERNET
You can connect the VS-48HDxl via the Ethernet, using a crossover cable
(see section 6.8.1) for direct connection to the PC or a straight-through cable
(see section 6.8.2) for connection via a network hub or network router
4
.
6.8.1 Connecting the ETHERNET Port directly to a PC (Crossover Cable)
You can connect the Ethernet port of the VS-48HDxl to the Ethernet port on
your PC, via a crossover cable with RJ-45 connectors.
This type of connection is recommended for identification of the factory default
IP Address of the VS-48HDxl during the initial configuration
After connecting the Ethernet port, configure your PC as follows:
1. Right-click the My Network Places icon on your desktop.
2. Select Properties.
1 According to SMPTE RP-168. The sources must be genlocked to the GENLOCK input in order to switch cleanly
2 The unit will detect automatically when SD-SDI inputs are used
3 If a change is made to the resolution or refresh rate. The button will not flash if the new timing is the same as that
previously selected
4 After connecting the Ethernet port, you have to install and configure your Ethernet Port and also install the COM Port
Redirector. For detailed instructions, see the “ Ethernet Configuration (Lantronix) guide.pdf” file in the technical support
section on our Web site: http://www.kramerelectronics.com
im Vertrieb von
CAMBOARD Electronics
www.camboard.de
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