Listen Technologies LR-44 Programmable Features Detailed Descriptions, Stereo Mode Default is OFF

DesignLRLA-LT42/44--14082Guide

Programmable Features Detailed Descriptions

Stereo Mode (Default is OFF)

Stereo Mode Function

This function must be set to match the type of signal that the receiver is receiving. If the receiver is receiving a mono signal this function must be OFF. If the receiver is receiving a stereo signal this function must be ON.

When to enable Stereo Mode

Stereo Mode must be enabled if the receiver is receiving a stereo signal from the transmitter.

Channel Lock-Out (Default is All Channels Available)

Channel Lock Out function

This function is used to lock out channels from being accessible to the user when the Select button is pressed or when the unit is seeking for a channel in Auto-Seek Mode. This function is different from the Channel Lock function in that this function removes channels from being selectable

ZKHUHDVWKH&KDQQHO/RFNIXQFWLRQKROGVWKHXQLWRQWKHFXUUHQWFKDQQHO%\XVLQJWKLVSURJUDP mode you can lock out any combination of channels.

When to Lock Out Channels

If you have Auto-Seek disabled (default setting) the unit scrolls to the next channel with each press of the Select button. If, for example, you have a two channel system you can use this feature to “lock out” the other two unused channels so that the user will not have to scroll through them to get to the channels with a signal. If you have Auto-Seek enabled and are using less than four channels, you can use the Channel Lock-Out mode to ensure the receiver will not stop on a channel without a signal. If, for example, you are

XVLQJ$XWR6HHN0RGHDQGKDYHWZRFKDQQHOVDFWLYHFKDQQHOVRQHDQGIRXUDQGÀQGWKDWRIWHQWLPHV when the unit seeks for channel four is stops on channel three, you would use the Channel Lock-Out Mode to eliminate the problem.

Auto-Seek (Default is Off)

Auto-Seek function

Upon power-up with the Auto-Seek feature enabled the unit will search for a channel with a signal present. If

DVLJQDOLVIRXQGWKHXQLWZLOOVWRSDQGVWD\RQWKDWFKDQQHO,IWKHXQLWGRHVQRWÀQGDVLJQDOLWZLOOFRQWLQXHWR seek until one is found. If the unit is on a channel with a signal it will remain on that channel until the signal is not detected for a short time at which point it will automatically seek for another channel with signal. If the Select button is pressed when the unit is on a channel it will seek for the next channel with a signal.

When to Enable Auto-Seek

It is recommended to enable the Auto-Seek feature in applications where a user will be moving from one area to another and does not want to have to manually change the channel on the receiver in each new area. Also if it is desired that the Select button act as a “seek” button instead of a manual scroll to the next channel button, Auto-Seek should be enabled.

Priority

If the receiver has been locked on a channel the lock will take priority over Auto-Seek.

Squelch Setting (Default is 3)

Squelch Setting

The purpose of squelch is to mute the audio output of the receiver when the signal from the radiator(s) is turned off or is too weak to be received. Without squelch you would hear radio noise in your earphone.

The squelch on your receiver can be adjusted so that it will mute at varying levels of signal strength. There are 16 settings that the squelch setting can be set to. The lowest squelch setting (no squelch) is “0” and the tightest squelch setting is “15.” The default setting is “3.”

When to Adjust Squelch Setting

For maximum range the squelch setting should be set to a low level (0, 1 or 2). However when setting the squelch level low the reliability of the squelch setting is compromised and will lead to radio noise being heard in the earphone when signal strength is low. If no radio noise is desired to be heard the squelch setting should be set to a tighter position. However when setting the squelch level high the receiver will have reduced range due to the audio being cut-off when signal is low. See “Programming Unit” section for instructions on how to adjust squelch setting.

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