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Installation and Setup
17
Instruction Manual – Precis DSP Matrix Switchers
Attaching an External Controller
The Precis DSP can be controlled externally by attaching an external control device/system that uses one of the
communication protocols listed below:
BCS (Serial) – ASCII sent over a null modem serial cable via the CONTROL (RS-232) port
XNNet – AMX AutoPatch protocol via the CONTROL (RS-232) port
TCP/IP – requires an external module; see the APWeb Server module documentation
An external serial controller is any device that can send and receive ASCII code over an RS-232 (null modem) serial
cable. A PC running control software is a common external controller. This section explains how to attach a PC to the
CONTROL port on the enclosure’s CPU, so the system can be set up (and controlled if desired) with APGraphic EQ
software, which is located at www.amx.com
.
Other serial controllers can also be attached by following the directions below (for controller options, see page 26).
PC Requirements for APGraphic EQ (also for APControl 3.0)
Windows XP Professional
®
or Windows 2000
®
Java Runtime Environment (JRE): v1.4.2 or the latest version (JRE v1.4.2 can be installed as part of
APGraphic EQ)
Minimum Hardware: 166 MHz, 128 MB RAM, 20 MB free disk space*, 800x600 display
Recommended Hardware: 2.0 GHz, 512 MB RAM, 20 MB free disk space, 1280x1024 display
Serial port
* Disk space and RAM details: APGraphic EQ requires 5 MB of disk space once installed. The installation process
requires 20 MB of disk space. If required, the JRE v1.4.2 that is packaged with the APGraphic EQ installer will require
approximately 200 MB of free disk space for the installation and approximately 100 MB once installed.
To establish external serial control:
1.
Use a null modem cable that matches the pin diagram in FIG. 5 for RS-232 without hardware flow control.
AMX equipment requires pins 2, 3, and 5 only.
2. Plug one end of the null modem serial cable into the CONTROL (RS-232 / DB-9) port on the enclosure (FIG. 6).
3. Plug the other end of the serial cable into the serial port on the PC (or other serial controller/device).
FIG. 5 RS-232 null modem pin diagram, no hardware flow control
FIG. 6 Attach null modem serial cable to CONTROL port