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Kramer VP-725DS User Manual

Presentation switcher / scaler
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Kramer Electronics, Ltd.
USER MANUAL
Model:
VP-725DS
Presentation Switcher / Scaler

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Summary of Contents for Kramer VP-725DS

  • Page 1 Kramer Electronics, Ltd. USER MANUAL Model: VP-725DS Presentation Switcher / Scaler...

  • Page 2: Table Of Contents

    Getting Started Quick Start Overview Your VP-725DS Presentation Switcher / Scaler Installing the VP-725DS on a Rack Connecting the VP-725DS Presentation Switcher / Scaler The RGBS and RGsB PINOUTs Connecting a PC Connecting the VP-725DS via the ETHERNET port 6.3.1 Connecting the ETHERNET Port directly to a PC (Crossover Cable) 6.3.2...
  • Page 3 VP-725DS Communication Protocol VP-725DS Text Overlay Protocol Figures Figure 1: VP-725DS Presentation Switcher / Scaler Figure 2: Connecting the VP-725DS Presentation Switcher / Scaler Figure 3: Connecting the PC Figure 4: RJ-45 PINOUT Figure 5: Local Area Connection Properties Window...
  • Page 4 Contents Figure 18: Selecting the Group Figure 19: Selecting the Source Figure 20: Geometry Screen Figure 21: Geometry (Aspect Ratio) Screen Figure 22: Geometry (Zoom) Screen Figure 23: OSD Enlarge Status Figure 24: Zoom Ratio Adjustment Example Figure 25: Zoom Position Adjustment Example Figure 26: Geometry (Zoom Ratio) Screen Figure 27: Geometry (Zoom Position Adjustment) Screen Figure 28: Geometry (Keystone) Screen...
  • Page 5 Table 22: Number of Buffers, Output Resolution and Maximum Display Height Table 23: TextOverlay Parameters Table 24: Technical Specifications of the VP-725DS Presentation Switcher / Scaler Table 25: Communication Protocol of the VP-725DS/VP-725DSA Table 26: Text Overlay Protocol of the VP-725DS...
  • Page 6 ADDENDUM: Ethernet Cross Cable Wiring Connection This addendum describes the correct wiring for crossover cable connections and replaces the opening paragraph in the "Connecting the ETHERNET Port directly to a PC (Crossover Cable)" section in the User Manual as follows: Connecting the ETHERNET Port directly to a PC (Crossover Cable) You can connect the Ethernet port of the machine to the Ethernet port on your PC, via a crossover cable with RJ-45 connectors.

  • Page 7: Introduction

    2 We recommend that you use only the power cord that is supplied with the machine 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...
  • Page 8 IN 1 IN 3 IN 1 IN 2 IN 2 IN 4 SCALED OUTPUTS R/Pr B/Pb OSD ON MODE SELECT FREEZE ENTER VIDEO SCALER DOWN GROUP Geometry: Brightness and Contrast Utilities: Gamma and Color: Source: Information: KRAMER: SIMPLE CREATIVE TECHNOLOGY...

  • Page 9: Overview

    Overview Overview The VP-725DS Presentation Switcher / Scaler is designed for a wide variety of presentation and multimedia applications. It is a true multi-standard video to graphics scaler and presentation switcher for a wide variety of presentation and multimedia applications. It consists of a very high quality scaler with many user-selectable pixel-rates including VGA (640x480), SVGA (800x600), XGA (1024x768), SXGA (1280x1024) and UXGA (1600x1200);...
  • Page 10 2 An HDCP source would show up as a very snowy, noisy picture at the output 3 Processing amplification enables adjustment of different video and audio signal parameters 4 The VP725 Text Overlay Application (Text Overlay Sender) for the VP-725DS (and the VP-725DSA) can be downloaded at http://www.kramerelectronics.com 5 See section 7.1...

  • Page 11: Your Vp-725Ds Presentation Switcher / Scaler

    (often associated with low quality cables) Avoid interference from neighboring electrical appliances and position your VP-725DS away from moisture, excessive sunlight and dust Your VP-725DS Presentation Switcher / Scaler Figure 1, Table 1 and Table 2 define the VP-725DS:...

  • Page 12: Figure 1: Vp-725Ds Presentation Switcher / Scaler

    IN 2 IN 4 IN 2 IN 4 G/Y2 B/Pb2 R/Pr2 G/Y4 B/Pb4 R/Pr4 SCALED OUTPUTS IN 1 IN 3 IN 1 IN 2 IN 2 IN 4 R/Pr B/Pb Figure 1: VP-725DS Presentation Switcher / Scaler KRAMER: SIMPLE CREATIVE TECHNOLOGY...

  • Page 13: Table 1: Front Panel Vp-725Ds Presentation Switcher / Scaler Features

    Your VP-725DS Presentation Switcher / Scaler Table 1: Front Panel VP-725DS Presentation Switcher / Scaler Features Feature Function VGA Button Selects one of the 4 VGA sources DVI Button Selects one of the 2 DVI sources CV Button Selects one of the 4 CV sources...

  • Page 14: Table 2: Rear Panel Vp-725Ds Presentation Switcher / Scaler Features

    Your VP-725DS Presentation Switcher / Scaler Table 2: Rear Panel VP-725DS Presentation Switcher / Scaler Features Feature Function R/Pr BNC Connector B/Pb BNC Connector Connect to the component video acceptor or to an RGB acceptor G/Y BNC Connector R/Pr BNC Connector...

  • Page 15: Installing The Vp-725Ds On A Rack

    Installing the VP-725DS on a Rack Installing the VP-725DS on a Rack This section describes what to do before installing on a rack and how to rack mount. Before Installing on a Rack Before installing on a rack, be sure that the environment is...

  • Page 16: Connecting The Vp-725Ds Presentation Switcher / Scaler

    VGA OUT HD15 connector to the respective video inputs on the projector. 1 Switch OFF the power on each device before connecting it to your VP-725DS. After connecting your VP-725DS, switch on its power and then switch on the power on each device...

  • Page 17: The Rgbs And Rgsb Pinouts

    Connecting the VP-725DS Presentation Switcher / Scaler 3. Connect the COMP OUTPUT BNC connectors : G/Y, B/Pb, and R/Pr to the respective component video inputs on the plasma monitor. 4. Connect up to three SCALED OUTPUTS, as follows: Connect the RGBHV connectors (G/Y, B/Pb, R/Pr, H, and V) to the...
  • Page 18 Connecting the VP-725DS Presentation Switcher / Scaler Figure 2: Connecting the VP-725DS Presentation Switcher / Scaler KRAMER: SIMPLE CREATIVE TECHNOLOGY...

  • Page 19: Connecting A Pc

    Connecting the VP-725DS Presentation Switcher / Scaler 6.2 Connecting a PC You can connect a PC (or other controller) to the VP-725DS via the RS-232 port for remote control, and for upgrading the firmware. To connect a PC to a VP-725DS unit, using the Null-modem adapter provided...

  • Page 20: Connecting The Vp-725Ds Via The Ethernet Port

    Connecting the ETHERNET Port directly to a PC (Crossover Cable) You can connect the Ethernet port of the VP-725DS to the Ethernet port on your PC, via a crossover cable with RJ-45 connectors, as Table 4 and Figure 4 define.

  • Page 21: Figure 5: Local Area Connection Properties Window

    Connecting the VP-725DS Presentation Switcher / Scaler Figure 5: Local Area Connection Properties Window 5. Select Use the following IP Address , and fill in the details as shown in Figure 6. Figure 6: Internet Protocol (TCP/IP) Properties Window 6. Click OK.

  • Page 22: Connecting The Ethernet Port Via A Network Hub (Straight-Through Cable)

    Connecting the ETHERNET Port via a Network Hub (Straight-Through Cable) You can connect the Ethernet port of the VP-725DS to the Ethernet port on a network hub or network router, via a straight-through cable with RJ-45 connectors, as Table 5 defines:...

  • Page 23: Understanding The Presentation Switcher / Scaler

    5 Video Groups: composite video, s-Video, component video (RGB or YPbPr), DVI-D and VGA. When the VP-725DS is in use, both modes operate simultaneously, as well as independently. That is, the Scaler output is available even when switching in...

  • Page 24: Activating The Pip Feature

    3 By default, 20 seconds. But you can reset the timeout (from 3 to 60 seconds), see section 9.1.5.5 4 Trying to activate the PIP again while the PIP is still enclosed by an orange frame deactivates the PIP KRAMER: SIMPLE CREATIVE TECHNOLOGY...

  • Page 25: Pip Characteristics

    Understanding the Presentation Switcher / Scaler 7.2.2 PIP Characteristics You can determine the following PIP characteristics: PIP Source PIP Size (1/25, 1/16, 1/9, 1/4, or split screen) Horizontal and Vertical position, placing it anywhere on the screen 7.2.3 Toggling between the PIP and the Screen Source (SWAP) To toggle back and forth between the PIP content and the screen source content, do the following: Press the SWAP key on the Infra-red remote control transmitter (see Figure 47)

  • Page 26: Locking And Unlocking The Front Panel

    1 However, operation via RS-232 serial commands (remote controller or PC) and/or ETHERNET is still available 2 By default, 20 seconds. But you can reset the timeout (from 3 to 60 seconds), see section 9.1.5.5 KRAMER: SIMPLE CREATIVE TECHNOLOGY...

  • Page 27: Operating The Presentation Switcher / Scaler

    Operating the Presentation Switcher / Scaler Operating the Presentation Switcher / Scaler This section describes how to: Switch and scale an input (see section 8.1) Select the output resolution (see section 8.2) 8.1 Switching an Input You can switch seamlessly between each input that is connected to a source, by pressing the appropriate INPUT SELECTOR button (when the SCALER...

  • Page 28: Displaying A Blank Screen

    2 Alternatively, press the FREEZE key on the infra-red remote control transmitter (see Figure 47) or the FREEZE front panel button. This will cause the FREEZE front panel button to illuminate and the appropriate INPUT SELECTOR button to flash KRAMER: SIMPLE CREATIVE TECHNOLOGY...

  • Page 29: Choosing The Output Resolution

    Operating the Presentation Switcher / Scaler 8.2 Choosing the Output Resolution You can select the output resolution by pressing the OUT key on the infra-red remote control transmitter (see Figure 47) or via the Output Setting OSD menu (see Table 15). The OSD status appears superimposed over the top right corner of the screen (when the Source Prompt is ON) for a few seconds , as Figure 11 illustrates...

  • Page 30: Controlling The Vp-725Ds Presentation Switcher / Scaler

    9.1 Operating via the OSD MENU Screen The OSD superimposes a menu on the screen from which you can control your VP-725DS. When the OSD ON front panel button is selected, pressing the MENU front panel OSD button or the MENU key on the infra-red remote control transmitter (see Figure 47) displays the first OSD screen, the “Brightness and Contrast”...

  • Page 31: Controlling The Brightness And Contrast

    Controlling the VP-725DS Presentation Switcher / Scaler Figure 13 defines the six interactive icons Brightness Gamma Geometry Utility Information Source and Color Contrast Figure 13: Menu Screen Icons 9.1.1 Controlling the Brightness and Contrast Figure 12 and Table 6 define the Brightness and Contrast Screen:...

  • Page 32: Selecting The Source

    Controlling the VP-725DS Presentation Switcher / Scaler Table 7: Controlling the Gamma and Color Gamma and Color Level 1 Level 2 Range Default Normal Presentation Cinema Nature User 1 / 2 Gamma -10 to 10 Color Temperature 0 to 127...

  • Page 33: Table 8: Selecting The Source

    DVI2 Comp Group Comp1 Comp2 Comp3 Comp4 YC Group AV Group Master VGA1 VGA2 VGA3 VGA4 DVI1 DVI2 Comp1 Comp2 Comp3 Comp4 Figure 17 illustrates the Search (Manual or Auto) option: 1 Disabled on the VP-725DS; available on the VP-725DSA...

  • Page 34: Figure 17: Selecting The Search

    Figure 17: Selecting the Search Selecting Manual Search disables the Auto Search option (which finds the active source). After powering up, the VP-725DS will not scan for an active input but will display the source selected prior to power down, even if that input is inactive.

  • Page 35: Controlling The Geometry

    Controlling the VP-725DS Presentation Switcher / Scaler 9.1.4 Controlling the Geometry Figure 20 and Table 9 define the main Geometry Screen, from which you can choose the aspect ratio, zoom, and set the keystone angle: Figure 20: Geometry Screen Table 9: Controlling the Geometry...

  • Page 36: Figure 21: Geometry (Aspect Ratio) Screen

    Controlling the VP-725DS Presentation Switcher / Scaler Figure 21 illustrates the Geometry (Aspect Ratio) Screen. You can set the following characteristics according to your specific requirements: anamorphic (displays the aspect ratio (usually 16:9)), virtual wide (anamorphic plus non-linear scaling), letterbox (the vertical line is expanded to full screen —...

  • Page 37: Adjusting The Zoom Ratio

    Controlling the VP-725DS Presentation Switcher / Scaler Figure 23: OSD Enlarge Status When you change the zoom ratio or zoom position, the screen image is adjusted correspondingly, and the change is reflected in the pop-up OSD Enlarge status box. For example, Figure 24 illustrates a zoom ratio increase...

  • Page 38: Adjusting The Zoom Position

    Controlling the VP-725DS Presentation Switcher / Scaler Figure 26: Geometry (Zoom Ratio) Screen 9.1.4.2 Adjusting the Zoom Position You can adjust the zoom position (see the example in Figure 25) via one or more of the following methods: Using the navigation control keys on the infra-red remote control...

  • Page 39: Configuring Via The Utility Screens

    Controlling the VP-725DS Presentation Switcher / Scaler Figure 28: Geometry (Keystone) Screen 9.1.5 Configuring via the Utility Screens You can determine how your VP-725DS will function either generally or on a specific occasion, via the Utility screen settings (see Figure 29): Figure 29: Utility Screen 9.1.5.1...

  • Page 40: Figure 30: Choosing The Graphic Utility Settings

    Controlling the VP-725DS Presentation Switcher / Scaler Figure 30: Choosing the Graphic Utility Settings Table 10: Choosing the Graphic Utility Settings Utility Level 1 Level 2 Level 3 Range Default Graphic Setting Color Format Default H-Position 0 to 255 V-Position...

  • Page 41: Choosing The Video Utility Settings

    Controlling the VP-725DS Presentation Switcher / Scaler 9.1.5.2 Choosing the Video Utility Settings Figure 32 and Table 11 define the Video Setting Utility screen. You can set the Color Format, Standard (see Figure 33), color, hue, sharpness, and position. Figure 32: Choosing the Video Utility Settings...

  • Page 42: Choosing The Pip Utility Settings

    Controlling the VP-725DS Presentation Switcher / Scaler 9.1.5.3 Choosing the PIP Utility Settings Figure 34 and Table 12 define the PIP Setting Utility screen. You can activate the PIP, choose the source, the size, and the position of the PIP.

  • Page 43: Choosing The Seamless Switch Utility Settings

    Controlling the VP-725DS Presentation Switcher / Scaler 9.1.5.4 Choosing the Seamless Switch Utility Settings Figure 35 and Table 13 define the Seamless Switch Utility screen. You can choose the image transition speed Mode Figure 35: Choosing the Seamless Switch Utility Settings...

  • Page 44: Choosing The Osd Utility Settings

    Controlling the VP-725DS Presentation Switcher / Scaler 9.1.5.5 Choosing the OSD Utility Settings Figure 36 and Table 14 define the OSD Setting Utility screen. You can set the OSD position, time out, size (see Figure 37), source prompt , and choose the blank color (blue or black - see Figure 38).

  • Page 45: Choosing The Output Utility Settings

    Controlling the VP-725DS Presentation Switcher / Scaler Figure 38: OSD Blank Color Utility Screen 9.1.5.6 Choosing the Output Utility Settings Figure 39 and Table 15 define the Output Setting Utility screen. You can set the resolution (see Figure 40), refresh rate (see Figure 41), color format, and a user definable output mode (see Figure 42 and Table 16).

  • Page 46: Figure 40: Output Setting Resolution Utility Screen

    Controlling the VP-725DS Presentation Switcher / Scaler Table 15: Choosing the Output Utility Settings Utility Level 1 Level 2 Level 3 Output Setting Resolution 640x480 720P 800x600 1080i 1024x768 576P 1280x1024 720x400 1600x1200 832x624 852x1024i 1024x800 1024x1024i 1152x864 1366x768 1152x870...

  • Page 47: Figure 41: Output Setting Refresh Rate Utility Screen

    Controlling the VP-725DS Presentation Switcher / Scaler Figure 41: Output Setting Refresh Rate Utility Screen 25.2 MHz Figure 42: Output Setting User Mode Setting Utility Screen Table 16: User Mode Setting Definitions User Mode Setting Definitions Horizontal total Horizontal sync pulse width...

  • Page 48: Choosing Factory Reset

    Controlling the VP-725DS Presentation Switcher / Scaler 9.1.5.7 Choosing Factory Reset From the Factory Reset Utility screen (see Figure 43), you can reset your VP-725DS to its preset default setting: Figure 43: Factory Reset Utility Screen 9.1.5.8 Choosing Advanced Utility Settings Figure 44 and Table 17 define the Advanced Utility screen.

  • Page 49: Verifying Configuration Details Via The Information Screen

    Controlling the VP-725DS Presentation Switcher / Scaler Table 18 describes the User Define Measure features. Table 18: User Define Measure Features User Mode Setting Definitions H Total Horizontal Total H Start Horizontal active start point H Active Horizontal active region...

  • Page 50: Operating Via The Lcd Display

    Keystone to 6 via the LCD Display, using the front panel buttons, do the following: 1. Turn the VP-725DS unit ON, and press the OSD ON button (if selected). 2. Press the appropriate front panel OSD buttons (as defined in Figure 46).

  • Page 51: Figure 47: Infra-Red Remote Control Transmitter

    Controlling the VP-725DS Presentation Switcher / Scaler Figure 47: Infra-red Remote Control Transmitter...

  • Page 52: Table 19: Infra-Red Remote Control Transmitter Functions

    SELECTOR COMP3, COMP4; YC1, YC2, YC3, YC4; VGA1, VGA2, VGA3, VGA4; DVI1 and DVI2 OVERRIDE Not available on the VP-725DS; available on the VP-725DSA Not available on the VP-725DS; available on the VP-725DSA TALKOVER Not available on the VP-725DS; available on the VP-725DSA...

  • Page 53: Operating Via Ethernet/Serial Port

    Figure 48: VP725 Ethernet Application Main Dialog Box (Configuration Tab) 1 Or connect the serial port of your VP-725DS to the serial port of your PC (see section 6.2) 2 Or download the software from our Web site on http://www.kramerelectronics.com...

  • Page 54: Figure 49: Vp725 Ethernet Application Search Panel Screen

    Controlling the VP-725DS Presentation Switcher / Scaler Table 20: VP725 Ethernet Application Configuration Tab Button Function Autoscan Press to automatically scan for connected machines Press to scroll down the Server list Down Press to scroll up the Server list Delete...

  • Page 55: Control The Vp-725Ds Via The Ethernet/Serial Port

    Figure 51: Setting an IP Number 9.4.3 Control the VP-725DS via the Ethernet/Serial Port To control the VP-725DS via the Ethernet, do the following: 1. On the VP725 Ethernet Application screen, click the Control tab. The Control screen appears (see Figure 52).

  • Page 56: Figure 52: Vp725 Ethernet Application Main Dialog Box (Control Tab)

    Controlling the VP-725DS Presentation Switcher / Scaler Figure 52: VP725 Ethernet Application Main Dialog Box (Control Tab) The Control tab includes: The front panel buttons The BLANK, SWAP, MUTE and KEYLOCK buttons, which appear only on the remote control transmitter...

  • Page 57: Using Text Overlay

    10 Using Text Overlay The text overlay feature is accessed via the Application Program (AP) Running this AP with the PC connected to the VP-725DS lets you display text over the screen, with a rich feature set including text color and speed, transparency, text position and repetition.

  • Page 58: Table 21: Features And Functions Of The Textoverlay Application

    Connect/Disconnect Connect the machine or disconnect TCP/IP Check box When selected, set the IP Address and Port to connect via Ethernet When selected, set the COM port and Baud Rate (9600 for VP-725DS) RS-232 Check box to connect via the RS-232 connector...

  • Page 59: Downloading The Textoverlay Program

    Using Text Overlay Table 22: Number of Buffers, Output Resolution and Maximum Display Height Maximum Display Height According to Number of Buffers Output Resolution 640x480 800x600 832x624 852x480 1024x768 1280x720 1280x768 1280x1024 1366x768 1365x1024 1400x1050 1600x1200 480P 576P 720P 1080i 1080p 10.1 Downloading the TextOverlay Program...

  • Page 60: Connecting And Disconnecting The Textoverlay Program

    3 Static or Scrolling 4 If required you can load a previously saved setting and continue to step 4 in this procedure 5 If you are loading a previously saved setting, the type of connection is already defined KRAMER: SIMPLE CREATIVE TECHNOLOGY...

  • Page 61: Saving And Loading Settings

    Using Text Overlay 4. Press the red “ Connect” button. Once a connection is established, the red “ Connect” button changes to a green “ Disconnect” button, and the connection type boxes are disabled. 5. If required, type the text in the message box, and edit the text message (see section 10.2).

  • Page 62: Technical Specifications

    Technical Specifications 11 Technical Specifications Table 24 includes the technical specifications: Table 24: Technical Specifications of the VP-725DS Presentation Switcher / Scaler INPUTS: 4 x CV 1Vpp/75 on BNC connectors 4 x YC 1Vpp (Y); 0.3Vpp (C)/75 on 4p connectors...

  • Page 63: Vp-725Ds Communication Protocol

    After set type Command setting, system will respond a string as “ Done” . The default data rate is 9600 Baud, with no parity, 8 data bits and 1 stop bit. Table 25 includes the Communication Protocol: Table 25: Communication Protocol of the VP-725DS/VP-725DSA Control Type Function Param (for Set) Function Description...
  • Page 64 VP-725DS Communication Protocol Control Type Function Param (for Set) Function Description Comment COMP1 COMP2 COMP3 COMP4 VGA1 VGA2 VGA3 VGA4 DVI1 DVI2 Override VP-725DSA only VP-725DSA only TalkOver VP-725DSA only SELECT Video Group Audio Group VP-725DSA only Scaler Master Audio...
  • Page 65 VP-725DS Communication Protocol Control Type Function Param (for Set) Function Description Comment 1: Set -32~32 V-Pan 2: Get 1: Set -32~32 Keystone Angle 2: Get 1: Set 0~255 Graphics H-Position 2: Get 1: Set 0~255 Graphics V-Position 2: Get 1: Set...
  • Page 66 VP-725DS Communication Protocol Control Type Function Param (for Set) Function Description Comment 1: Set 0~255 Audio Level: Mic Input Level VP-725DSA only 2: Get 1: Set 0~36 PIP Setting: PIP H-Position 2: Get 1: Set 0~36 PIP Setting: V-Position 2: Get...
  • Page 67 VP-725DS Communication Protocol Control Type Function Param (for Set) Function Description Comment 1: Set Gamma and Color: User1Color Manager 0~32 2: Get 1: Set Gamma and Color: User1Color Manager 0~32 2: Get Green 1: Set Gamma and Color: User1Color Manager...
  • Page 68 VP-725DS Communication Protocol Control Type Function Param (for Set) Function Description Comment 0: Video Standard - Auto 1: Video Standard - NTSC 2: Video Standard - NTSC 4.43 3: Video Standard - 3: Set Video Setting: 4: Get Video Standard...
  • Page 69 VP-725DS Communication Protocol Control Type Function Param (for Set) Function Description Comment Aspect Ratio - Anamorphic Aspect Ratio - Virtual Wide Aspect Ratio - Letterbox Aspect Ratio - Native Aspect Ratio - 4:3 Output Aspect Ratio - User Define example: VGA/DVI/COMP "Y 8 0 CR"...

  • Page 70: Vp-725Ds Text Overlay Protocol

    VP-725DS Text Overlay Protocol 13 VP-725DS Text Overlay Protocol Table 26 includes the Text Overlay Protocol. Command P1 P2 P3; P1, 2, 3: Parameters 1, 2, 3 Table 26: Text Overlay Protocol of the VP-725DS Functions Command Comments Display Buffer T12ED ** ** Page No.
  • Page 71 EXCLUSION OF DAMAGES The liability of Kramer for any effective products is limited to the repair or replacement of the product at our option. Kramer shall not be liable for: Damage to other property caused by defects in this product, damages based upon inconvenience, loss of use of the product, loss of time, commercial loss;...
  • Page 72 For the latest information on our products and a list of Kramer distributors, visit our Web site: www.kramerelectronics.com, where updates to this user manual may be found. We welcome your questions, comments and feedback. Safety Warning: Disconnect the unit from the power supply before opening/servicing.

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