Appendix ap4 – EMM Labs PRE2-SE User Manual
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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)
Control Messages (cont’d)
Loop (LP)
:
*PRLP00NA loop OFF
*PRLP01NA
loop
ON
Display Dim (DM)
:
*PRDM00NA no dimming, full brightness
*PRDM01NA
reduced
brightness
*PRDM02NA the backlight is turned off
Volume Display
Units (VU)
:
*PRVU00NA reserved code
*PRVU01NA the Volume is displayed in Steps (0 to 100)
*PRDM02NA the gain of signal path is shown (in Decibels)
Save settings (SV)
:
*PRSV00NA product operational settings are saved in non-volatile memory
NULL Cmd. (NL)
:
*PRNLxxNA where ‘xx’ are any 2 alphanumeric characters; this message is used in system
testing
only.
Control Message Timing
Back-to-back command messages can be sent to PRE2 unit, however, no flow control mechanism is used. The longest
recommended data burst is 10 messages. In such a case the burst should be followed by 100ms of idle time. In a real-life
system, this constraint is of no consequence.