EMM Labs PRE2-SE - Manual (Page 19)

019 Appendix A - PRE2 Serial Remote Control (RS232)
© 2014 EMM Labs Inc., All Rights Reserved. EMM Labs reserves the right to amend specifications & design without notice.
PRE2 STEREO PREAMPLIFIER OWNER’S MANUAL
PRE2 Serial Remote Control (RS232)
Introduction
The PRE2 can be remotely controlled in one of the two (mutually exclusive) modes:
• Standard mode
• Slave Preamp mode.
In Standard mode the product receives and acts upon the RC-6 Infra Red Remote commands. Recognized IR codes are
translated into EMM Labs’ ASCII-based control commands that are sent out on the RS232 port. The Command Protocol is
defined in Section 2. The PRE2 also receives the control commands from RS232 port. Recognized commands are acted upon,
and, in addition, echoed (sent out) in the transmit path on the RS232 port.
All outgoing RS232 commands are destined for slave PRE2s, which are meant to act in sync with main unit. In Slave Preamp
mode, the IR Remote receiver is disabled, but the product still receives commands at its RS232 port. As before, the decoded
and recognized commands are echoed in the transmit path of the RS232. This will facilitate product daisy-chaining, where
multiple slave preamps can act in sync with the main (Standard) unit.
In either mode, all front panel controls and menus are fully operational. Standard/Slave modality determines only the
IR remote control capabilities of this product. The Standard controller mode is best used in the following scenarios:
• PRE2 is the only preamp in a system
• PRE2 is the main pre-amp in a multichannel set-up, typically running front-left and front-right channels; the main
preamp is receiving IR remote commands, while other preamps are slaved to it.
The Slave mode should be used when the PRE2 is in the signal path of any additional channels in a multichannel
set-up. The slave unit follows main preamp actions while the main unit receives IR Remote commands. Multiple
slave preamps can be connected in a daisy-chain configuration.