Listen LA-140 Reference guide

LA-140 Quick Reference Card

Power (Red):

This red LED is lit when

there is power to the radiator.

No Connection (Yellow):

This yellow LED indicates a coaxial

cable fault. If illuminated, the radiator

is either not connected to a powered

transmitter or another radiator.

Carrier Present (Green):

This green LED is lit when there is

signal present to the radiator.

During normal operation the red

and green LEDs will be continuously

lit (unless SW1 is o).

LA-140 Quick Reference Card

RF Input:

Input RF signal from a

transmitter or radiator here.

RF Output:

Output RF signal to an

additional radiator here. Power Input: Connect power here.

Delay Compensation Switch:

Adjust the amount of signal delay

to this radiator. In single radiator

systems the position of this switch

does not matter, in multiple

radiator systems this switch must

be set properly.

See manual.

Termination Switch: If there is

no RF being output from the RF

Output connection, this switch

must be in the “ON” position.

Default: ON

Power Output: Output power

to an additional radiator here.

LED Indicator

Shuto Switch

(SW1): Controls

LED indicators on

front of radiator.

Default: ON

Listen mode (SW2):

if using a LA-140

Radiator with another

manufacturer’s

transmitter/modulator,

it is necessary to put

this switch in the OFF

position. IMPORTANT:

Always ensure SW2

is in the ON position

when using a LT-82

Transmitter. Default: ON

For further details regarding your Listen products please visit our website at

www.listentech.com

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