Kramer Electronics user manual Overview, This section defines the VA-8xl

Page 6

3 Overview

The VA-8xl8-Channel Balanced Stereo Audio Amplifier is a high−performance

8-channel, balanced stereo input volume controller for balanced audio signals on terminal block connectors. The volume of each L and R stereo channel can be adjusted independently of the other stereo channel.

In particular, the VA-8xlfeatures:

A digitally controlled volume control function, with gain from -95dB (attenuation) up to +31dB (amplification) - in increments of 0.5dB

Clean, noise-free transition during gain setting changes

Transparent performance even in the most critical broadcast applications

8 independent channels

Control of the amplifier gain of the left and right channels— together or separately—via the front panel buttons, or remotely via RS-232 or RS-485

Daisy-chaining of up to 15 machines in a single system using RS-485 or RS-232, allowing control of up to 120 stereo audio channels!

Storing and recalling up to 15 configuration setups via the non- volatile memory, using the front panel buttons, or remotely via RS-232 or RS-485

A LED display on the front panel, showing the gain of the selected channel (that is, its left and right decibel status)

Easy-to-connect detachable terminal block connectors

A rugged, professional 1U rack mountable enclosure and ship with Windows®-based software

3.1Defining the VA-8xl 8-Channel Balanced Stereo Audio Amplifier

This section defines the VA-8xl.

VA-8xl - Overview

3

Image 6
Contents VA-8xl Page Figures Introduction Getting Started Achieving the Best PerformanceOverview This section defines the VA-8xlPower Switch VA-8xl 8-Channel Balanced Stereo Audio Amplifier Rear Panel Connecting the VA-8xl If required, connect a PC via RS-232, seeVA-8xl Connecting the VA-8xl Adjusting the Gain/Attenuation of the Channels Operating the VA-8xlStoring and Recalling Setups To store a setting, via the front panel buttonsVA-8xl Operating the VA-8xl Controlling the VA-8xl Controlling a Single VA-8xl UnitPreparing the RS-232 Port on a Single Unit To PC Illustrates how to configure up to 15 VA-8xlunits Connecting a Control Interface on a Set of Units Preparing the RS-232 Connectors Connecting the RS-485 Control Interface An RS-485 Control Interface Setup Connecting the PC to the RS-232 Port Upgrading the Flash MemoryDownloading from the Internet Upgrading Firmware Splash ScreenOpen Configuration File window appears Atmel Flip Window RS-232 Communication If an error message Not Finished shows, click Run again Atmel Flip Window Operation Completed Technical Specifications Default Communication Parameters RS-232 ProtocolKramer Protocol 1st ByteHex Codes for Attenuation Gain Control Hex Codes for Amplification Gain Control Channel Number CodesVA-8xl Kramer Protocol 2900