Appendix a, Communication Settings | Meridian Audio LD100/LD100U

APPENDIX A

LD100/LD100U Remote Control Operation

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

CABLE SPECIFICATION: Computer Interface

LD100/LD100U	DATA TERMINAL or
Line Doubler			IBM PC
DB25 (MALE)	DB25 (FEMALE)
RxD 2				20 TxD
RxD 2				20 TxD
TxD 3				30 RxD
TxD 3				30 RxD
GROUND 7				70 GROUND
GROUND 7				70 GROUND
				40 RTS
				40 RTS
				50 CTS
				50 CTS
				60 DSR
				60 DSR
				20 DTR
				20 DTR
CABLE SPECIFICATION: AMX AXC-232 Interface
LD100/LD100U	AMX AXC-232
Line Doubler		INTERFACE
DB25 (MALE)
RxD 2				3 TxD
RxD 2				3 TxD
TxD 3				2 RxD
TxD 3				2 RxD
GROUND 7				1 GROUND
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

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.