KR AMER ELECTRON ICS LT D.
Contents 1 Introduction 1 2 2.1 Getting Started Achieving the Best Performance 2 2 3 3.1 3.2 Overview The VM-5ARII Video Audio Distribution Amplifier The VM-20ARII 1:20 Programmable Video Audio Distributor 3 3 3 4 Defining the VM-5ARII and VM-20ARII 5 Installing in a Rack 10 6 6.1 6.
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.
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 Use only the power cord that is supplied with this machine i 2.1 Go to http://www.kramerelectronics.com to check for up-to-date user manuals, application programs, and to check if firmware upgrades are available (where appropriate).
3 Overview This section gives an overview of the: 3.1 • VM-5ARII Video Audio Distribution Amplifier, see Section 3.1 • VM-20ARII 1:20 Programmable Video Audio Distributor, see Section 3.2 The VM-5ARII Video Audio Distribution Amplifier The Kramer VM-5ARII is a high-performance distribution amplifier for composite video and unbalanced stereo audio signals. It takes one input, provides correct buffering and isolation and distributes the signal to five identical outputs.
More specifically, the VM-20ARII features: 4 • High bandwidth of 430MHz (-3dB) • 1 video input and 20 outputs on BNC connectors • 1 unbalanced stereo input and 20 outputs on RCA connectors • Looped input capability • Grouped audio level control • Selectable input signal termination • Audio level and video level and equalization controls • Video AC/DC coupling selection • Standard 19” 2U rack mount size VM-5ARII, VM-20ARII - Overview
4 Defining the VM-5ARII and VM-20ARII This section defines your: • • VM-5ARII Video Audio Distribution Amplifier, see Figure 1 VM-20ARII 1:20 Programmable Video Audio Distributor, see Figure 2, Figure 3 and Figure 4 VM-5ARII, VM-20ARII - Defining the VM-5ARII and VM-20ARII 5
6 VM-5ARII, VM-20ARII – Defining the VM-5ARII and VM-20ARII Figure 1: VM-5ARII Video Audio Distribution Amplifier – Front and Rear Panels Feature 6 Function 1 Illuminated Power Switch Illuminated switch for turning the unit ON or OFF 2 VIDEO IN BNC Connector Connects to the video source 3 75Ω/Hi-Z Pushbutton Press in for input 75Ω termination, release for no termination 4 DC/AC Pushbutton Press in for DC coupling, release for AC coupling 5 VIDEO LOOP BNC Connector Connects to a display 6
VM-5ARII, VM-20ARII – Defining the VM-5ARII and VM-20ARII Figure 2: VM-20ARII 1:20 Programmable Video Audio Distributor – Front Panel # 1 Feature Function Illuminated Power Switch Illuminated switch for turning the unit ON or OFF 2 STEREO/BAL pushbuttons Select stereo or balanced mode of operation (pushed=balanced) 3 OUT 1-20 (L, R) audio GAIN trimmers Controls audio level of outputs 1 to 20 4 OUT 1-20 EQ.
8 VM-5ARII, VM-20ARII – Defining the VM-5ARII and VM-20ARII Figure 3: VM-20ARII 1:20 Programmable Video Audio Distributor – Rear Panel # 8 Feature Function 7 VIDEO INPUTS (1-4) and LOOP (1-4) BNC Connectors Connect to the video sources and input loops 8 AUDIO IN (L and R) (1-4) RCA Connectors Connect to the L and R channels of the audio source 9 AUDIO OUT (L and R) (1-20) RCA Connectors Connect to the audio acceptors (from 1 to 20) 10 VIDEO OUTPUTS (1-20) BNC Connectors Connect to the video
Figure 4: VM-20ARII Underside Switches # Feature Function 12 TERM/75Ω Switches (IN1-IN4) Select 75Ω for termination (up) or HI-Z for looping (down) 13 AC/DC Switches (IN1-IN4) Select DC (up) or AC (down) coupling VM-5ARII, VM-20ARII - Defining the VM-5ARII and VM-20ARII 9
5 Installing in a Rack This section provides instructions for rack mounting the units. Note: The VM-20ARII is a 2U unit and has rack “ears” with 5 mounting holes and screws.
6 Connecting the Distribution Amplifiers This section describes how to connect the: • VM-5ARII Video Audio Distribution Amplifier, see Section 6.1 • VM-20ARII 1:20 Programmable Video Audio Distributor, see Section 6.2 i 6.1 Always switch off the power to each device before connecting it to your VM-5ARII/VM-20ARII. After connecting your VM-5ARII/VM-20ARII, connect its power and then switch on the power to each device.
7. If needed, adjust the VIDEO GAIN or EQ controls or the AUDIO GAIN on the front panel. Figure 5: Connecting the VM-5ARII 6.2 Connecting the VM-20ARII Video Audio Distributor To connect the VM-20ARII, as shown in the example in Figure 6, do the following: 1. Connect up to 4 input video sources (for example, composite video players) to the VIDEO INPUTS 1 to 4 BNC connectors. 2.
3. Connect the VIDEO OUT 1 to 20 BNC connectors to up to 20 acceptors (for example, composite video recorders). You are not required to connect all the acceptors. 4. Connect the AUDIO OUT 1 and 20 RCA connectors to up to 20 acceptors (for example, the audio input on the video recorders). You are not required to connect all the acceptors. 5. If needed, connect the VIDEO LOOP BNC connector to an acceptor (for example, a composite video display or another VM-20ARII) and set the termination pushbutton to 75Ω.
Figure 6: Connecting the VM-20ARII 14 VM-5ARII, VM-20ARII - Connecting the Distribution Amplifiers
7 Technical Specifications VM-5ARII INPUT: 1 video, composite or single component, looping, 1Vpp/75Ω on BNC connectors with termination switch; 1 audio stereo looping, +4dBu/50kΩ on RCA connectors OUTPUT: 5 video, composite or single component, 1 Vpp/75Ω on BNC connectors; 5 audio stereo, +4dBu/150Ω, on RCA connectors MAX. OUTPUT: Video: 2.2Vpp; Audio: 27Vpp VIDEO BANDWIDTH (-3dB): 360MHz AUDIO BANDWIDTH (-3dB): 60kHz DIFF. GAIN: 0.03% DIFF. PHASE: 0.06Deg K-FACTOR: 0.
VM-20ARII INPUT: 4 video looping, 1Vpp/75Ω on BNC connectors with termination switches; 4 audio stereo (or balanced mono) +4dBu/50kΩ, on RCA connectors OUTPUT: Video: 20 (1:20, 2x1:10, 4x1:5, 1:10, 2x1:5) 1Vpp/75Ω on BNC connectors; Audio: 20 (1:20, 2x1:10, 4x1:5, 1:10, 2x1:5) stereo or balanced mono, +4dBu/50Ω, on RCA connectors VIDEO BANDWIDTH (-3dB): 430MHz AUDIO BANDWIDTH (-3dB): 110kHz DIFF. GAIN: 0.06% DIFF. PHASE: 0.08Deg VIDEO S/N RATIO: 76dB AUDIO S/N RATIO: 80dB VIDEO CONTROL: -1.
VM-5ARII, VM-20ARII - Technical Specifications 17
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.
