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To reconfigure the HD621 from its standard defaults, you will need to connect a Windows
computer via the RS232 connector and use the Meridian Mconfig application to set it up. See
below for details.
Controlling the HD621
The HD621 can be controlled via Meridian Comms, from the front panel and via RS232 serial
commands.
The front panel allows you to step through the active inputs. An input that has been disabled will
not be included as you step through. No other functions are accessible from the front panel.
RS232 can be used to control the HD621 in conjunction with a home automation system. The
unit responds to standard Meridian commands to select named sources, enter Standby and other
functions. An RS232 command table is available on request.
Setting up the HD621 with Meridian's
Configuration Application
Meridian's Configuration Application is a Windows application that is used to set up Meridian
components and systems, and is supplied on the CD that accompanies many Meridian products.
For details on how to use it, see its built-in Help files. You can also download its User Guide
from the Support section of the Meridian Web Site at http://www.meridian-audio.com. Move the
mouse over the Support option in the main menu and select "Release notes and Guides", then
click the link to download the Acrobat PDF file. The Configuration Application is installed by
the Common Installer which can also be downloaded from the Support section of the web site
(choose "Download Installer" from the Support menu). Web addresses may change over time.
Contact Meridian if you cannot locate the information described.
Connections
Connect your computer to the HD621 via RS232 and run the Meridian Configuration Application.
The HD621 is set up in the same way as any other Meridian component.
• Note: the HD621 can act as a Controller. However you will only use it as such in a non-
Meridian system. If you select the HD621 as the controller in a Meridian system, the available
inputs on a Meridian processor you add subsequently will be limited to those defined for the
HD621.
To configure the capabilities of the HD621, bring up the Properties dialog for the product.
The Audio tab is used to define the audio behaviour of the HD621 (see illustration overleaf).
The first row, Audio Output, selects the output port used to interface with the system, using the
pop-up menu in the "Value" column. This will either be "SmartLink/MMHR" (normally, to use the
phono or RJ45 outputs) or, exceptionally, "Video HDMI", which retains the audio on the the HDMI
output along with the video. All the following rows describe to the HD621 the capabilities of the
product(s) it is feeding.
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