Meridian Audio LD100/LD100U - Manual (Page 14)

Overview
Remote control of the LD100 / LD100U Line
Doubler is provided by an RS-232 serial interface
connector located on the rear panel of the unit. A
external controller such as a computer or integrated
system controller with an RS-232 interface may be
used to control all user accessible functions of the
Line Doubler.
RS-232 controllable functions include: Video, Y/C
(S-VHS), RGB, Component (YUV), Brightness,
Contrast, Color, Tint, Noise Reduction, Detail Level,
Auto-Tint, Digital Filter On/Off, Freeze On/Off, Echo
On/Off, Help, Status and Return to Factory Preset.
Communication Settings
Communication with the LD100 Line Doubler is
accomplished by setting the following conditions:
9600, No Parity, 8 Data Bits and 1 Stop Bit. The fac-
tory BUAD rate is set at 9600, but rates of 1200,
2400 and 4800 are also available.
Baud Rate Selection
To change the RS-232 BAUD rate, remove the top
cover of the LD100 Line Doubler. A 4 switch Dip
switch is located on the front panel. Set the switch-
es from the table shown below. If the BAUD rate is
changed, the LD100 MUST be powered off and
then on for the new BAUD rate to take effect.
DIP Switch Settings
Rate 1 2 3 4
1200 ON ON ON ON
2400 OFF ON ON ON
4800 ON OFF ON ON
*9600 OFF OFF ON ON
* = Factory Preset
INSTALLATION
Interface to the LD100 Line Doubler is done by
using a 3 wire interface. Interface schematics for the
IBM-PC™, AMX™ and CRESTRON™ controllers
are shown to the right.
CABLE SPECIFICATION: Computer Interface
LD100/LD100U DATA TERMINAL or
Line Doubler IBM PC
DB25 (MALE) DB25 (FEMALE)
RxD 2 2 0 TxD
TxD 3 3 0 RxD
GROUND 7 7 0 GROUND
4 0 RTS
5 0 CTS
6 0 DSR
20 DTR
CABLE SPECIFICATION: AMX AXC-232 Interface
LD100/LD100U AMX AXC-232
Line Doubler INTERFACE
DB25 (MALE)
RxD 2 3 TxD
TxD 3 2 RxD
GROUND 7 1 GROUND
CABLE SPECIFICATION:
CRESTRON CNCOMH-2/CNMS Interface
LD100/LD100U CRESTON CNCOMH-2
Line Doubler INTERFACE
DB25 (MALE)
RxD 2 3 TxD
TxD 3 2 RxD
GROUND 7 5 GROUND
13
APPENDIX A
LD100/LD100U Remote Control Operation