K R A ME R E LE CT R O N IC S L TD .
Contents 1 Introduction 1 2 2.1 2.2 2.3 3 3.1 3.2 Getting Started Achieving the Best Performance Safety Instructions Recycling Kramer Products Overview Defining the VM-24H 2 Input 1:4 HDMI Distributor Using the IR Transmitter 2 2 3 3 4 4 7 4 Installing in a Rack 8 5 Connecting the VM-24H 6 6.1 6.2 6.3 Operating the VM-24H Controlling via RS-232 Operating the VM-24H Using the EDID Buttons 11 11 12 12 7 Technical Specifications 15 8 8.1 8.
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 video, audio, presentation, and broadcasting professionals on a daily basis.
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 i 2.1 Go to http://www.kramerelectronics.com/support/product_downloads.asp to check for up-to-date user manuals, application programs, and to check if firmware upgrades are available (where appropriate).
2.2 Safety Instructions ! 2.3 Caution: There are no operator serviceable parts inside the unit Warning: Use only the power cord that is supplied with the unit Warning: Do not open the unit.
3 Overview The VM−24H is a distribution amplifier for HDMI signals. The unit reclocks and equalizes one of two selectable input signals and distributes it to four identical outputs. The VM-24H features: A maximum data rate of 6.75Gbps ( 2.25Gbps per graphic channel) HDMI support for Deep Color, x.v.
VM-24H – Overview Figure 1: VM-24H 2 Input 1:4 HDMI Distributor Front Panel # Feature Function 1 IR Receiver The red LED is illuminated when receiving signals from the Kramer infrared remote control transmitter 2 POWER Switch Illuminated switch for turning the unit ON or OFF 3 SELECT IN 1 Button Press to select source 1 and distribute this signal to the outputs 4 SELECT IN 2 Button Press to select source 2 and distribute this signal to the outputs 5 EDID READ Button Press, after pressing th
6 Figure 2: VM-24H 2 Input 1:4 HDMI Distributor Rear Panel # Feature Function 8 INPUT 1 HDMI Connector Connects to the HDMI source 1 9 INPUT 2 HDMI Connector Connects to the HDMI source 2 10 OUTPUT HDMI Connectors Connects to the HDMI acceptor (from 1 to 4) 11 RS-232 9-pin D-sub Port Connects to the PC or the Remote Controller (via a null modem connection) 12 REMOTE IR Opening Connects to an external IR receiver unit for controlling the machine via an IR remote controller instead of using t
3.2 Using the IR Transmitter You can use the RC-IR3 IR transmitter to control the machine via the built-in IR receiver on the front panel or, instead, via an optional external IR receiver (Model: C-A35M/IRR-50). The external IR receiver can be located up to 15 meters away from the machine. This distance can be extended to up to 60 meters when used with three extension cables (Model: C-A35M/A35F-50).
4 Installing in a Rack This section provides instructions for rack mounting the unit.
5 Connecting the VM-24H i Always switch off the power to each device before connecting it to your VM-24H. After connecting your VM-24H, connect its power and then switch on the power to each device. To connect the VM-24H, as illustrated in the example in Figure 3, do the following: 1. Connect the two HDMI sources, for example, a DVD player and a set top box, to the INPUT 1 and INPUT 2 connectors, respectively. 2.
Figure 3: Connecting the VM-24H 2 Input 1:4 HDMI Distributor 10 VM-24H - Connecting the VM-24H
6 Operating the VM-24H This section describes how to: 6.1 Control the VM-24H via RS-232, see Section 6.1 Operate the VM-24H, see Section 6.2 Use the EDID button, see Section 6.3 Controlling via RS-232 You can connect to the unit via a crossed RS-232 connection, using for example, a PC. A crossed cable or null-modem is required as shown in method A and B respectively. If a shielded cable is used, connect the shield to pin 5.
in Method A above) only requires pins 2, 3 and 5 to be connected, you are free to decide whether to connect only these 3 pins or all 9 pins. 9 8 7 6 5 4 3 2 1 Null-Modem Adapter to PC Figure 5: Straight Cable RS-232 Connection with a Null Modem Adapter 6.2 Operating the VM-24H To operate the VM-24H: 1. Turn ON the POWER. 2. Select the desired input. 3. If required, press the EDID button to acquire or change the EDID data (see Section 6.3). 6.
To cycle between the different modes (One Output, Default and Auto-mix), as defined in the following table, press the EDID SELECT button. Current EDID Mode Appearance To cycle to the Default EDID One Output The selected output LED flashes Press the EDID SELECT button once again after selecting output 4.
5. While the EDID is being copied, the EDID SELECT and READ buttons illuminate. The new EDID is copied when both buttons no longer illuminate. 6.3.2 Acquiring the Default EDID To reset to the default EDID (the factory-default programmed into the VM-24H before it is shipped), do the following: 1. Connect the power supply. 2. Press the EDID SELECT button and set it to the Default EDID mode. All the OUTPUT STATUS LEDs flash simultaneously. 3. Press the EDID READ button to copy the default EDID to the inputs.
7 Technical Specifications INPUTS: 2 HDMI connectors OUTPUTS: 4 HDMI connectors MAX. DATA RATE: 6.75Gbps ( 2.
8 Communication Protocol The VM-24H is compatible with Kramer’s Protocol 2000. This RS-232/RS-485 communication protocol uses four bytes of information as defined below. For RS-232, a null-modem connection between the machine and controller is used. The default data rate is 9600 baud, with no parity, 8 data bits and 1 stop bit. Note: Compatibility with Kramer’s Protocol 2000 does not mean that a machine uses all of the commands below. Each machine uses a sub-set of Protocol 2000, according to its needs.
8.
NOTE 16 – The reply to the REQUEST WHETHER PANEL IS LOCKED is the same as in NOTE 4 above, except that OUTPUT is assigned with the value 0 if the panel is unlocked, or 1 if it is locked. NOTE 20 – When data (i.e. the INPUT and/or OUTPUT bytes) of more than 7 bits is required, instruction 63 is sent before sending the instruction needing the additional bits. The data in this instruction then becomes the most significant bits of that next instruction.
For the latest information on our products and a list of Kramer distributors, visit our Web site where updates to this user manual may be found. We welcome your questions, comments, and feedback. Web site: www.kramerelectronics.com E-mail: info@kramerel.
