Component Specifications

LX-DSP System Processor

Performs matrix mixing automation and control, using the TI-TMS320C6701 Digital Signal Processor. This DSP card also holds 32MB SDRAM and 8MB Flash memory, allowing stand-alone operation once programmed with an automation cue list. The DSP is also interfaced to four relay contact outputs, four digital sensor inputs and two analogue sensor inputs for control and reading of external devices.

Channels

Maximum 160/512 audio I/O channels

Dynamic Range

192dB

Digital Logic Inputs

LX-DSP cards with serial numbers 0000–0688 require an external pull-up resistor to use the Digital Logic Inputs. Connect a 1/4W 2K2 resistor between the Digital Logic Input terminal and the +5V reference voltage. One resistor is required for each Digital Logic Input.

Special DSP ID Numbers

The ID switch on an LX-DSP module can be set to force the LX-300 to erase the flash memory. This is not required in normal operation. See Special DSP ID Codes (p. 16) for more information.

LX-DSP Pin-outs: LX-DSP Sensor I/O Terminal Block

Pin

Name

Signal

Use

1

+5V ref

+5V

Reference voltage

2

ADC1

0-5V

Analog sensor input

3

ADC2

0-5V

Analog sensor input

4

D1

-TTL (active low with

internal Digital logic input

5

D2

2K2 pull-up resistor)

 

 

 

6

D3

 

 

7

D4

 

 

8

GND ref

GND

Reference ground

9

R1

500mA@48V max

Relay N/O dry contact

10

11 R2

12

13 R3

14

15 R4

16

35

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Meyer Sound LX-300 manual LX-DSP System Processor, Digital Logic Inputs, Special DSP ID Numbers, Pin Name Signal Use