3
sLX4L User Guide supplement:
Logic Functionality
sLX4L Receiver Overview
A logic circuit and associated terminal block connector is provided on the SLX4L receiver, in order to function optimally with
software echo cancellers and provide remote monitoring of transmitter battery life. Supported models are the MX690, MX890
transmitters.
Three logic pins on a terminal block connector are provided for Transmitter Mute Status, Transmitter Battery Status and Logic
Ground.
Operation
Two modes are provided: Normal and Logic:
Normal
In Normal mode, when the MX690, MX890, or any SLX transmitter mute button is pressed, audio is muted at the transmitter
and receiver output.
Logic
In Logic mode, when the MX690, MX890 mute button is pressed the transmitter still sends audio to the receiver, and the
receiver still sends an audio signal through the audio outputs. The transmitter Mute Status pin sends a TTL Logic High (+5V)
signal, telling the external device that the transmitter is in mute status.
selecting Modes
The SLX4L ships in Normal mode. To switch between modes with the unit powered on, press and hold the Select button then
press the Power button. In Logic mode, the front panel LCD flashes
logic
. In Normal mode, the front panel will flash
nor
. An LED near the terminal block connector illuminates when Logic mode is active.
When an IR sync to the transmitter is performed, the receiver will set the transmitter to either Logic or Normal, whichever the
current state of the receiver is. Both transmitters and receivers will always remember the last mode status.
Compatible Models
Transmitters compatible with Logic mode are the MX690, MX890.
SLX4L Back Panel
