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Issue 21
TX500 series technical manual
13.2 Overview
The Masterpiece HD mixer is a single PCB enclosed in a 1U metal enclosure. The
enclosure is fitted with standard fixing brackets to enable it to be mounted in a rack.
All of the connections are on the back of the box with the inputs being directly fitted to the
main PCB, thereby maintaining a high quality signal path.
Fully redundant dual power supplies are supplied as standard.
The key set-up and troubleshooting indicators are mounted on the front of the PCB to allow
for easy access. DIL switches are available for configuration, and all system software
including the operating system is held within a compact flash card. This allows for easy
upgrades in the field.
The Ethernet port is an industry standard 10/100 Base-T and will be available as a future
option. There are two serial ports; an RS485 port for control from the TX control system and
an RS232 for debug information on a terminal. Termination of the RS485 ports is by way of
jumpers on the main PCB.
All signal processing is carried out by a single processing chip, and system configuration by
an Electrically Programmable Logic Device (EPLD).
Figure 1: Front view of HD mixer