Controls And Functions - Lectrosonics UM190B Operating Instructions Manual

INPUT JACK
The input on the UM190B accommodates virtually every lavalier, hand-held or shotgun microphone available. Use a
Switchcraft TA5F connector on the cord. See the separate sheet titled "Transmitter 5-Pin Input Jack Wiring"
regarding the correct connections for various microphones, and other sources.
ON/OFF SWITCH
Turns the battery power on and off.
"ON" LAMP
Glows brightly when the battery is good. A weak or dim lamp means that the battery is weak, and has about half an
hour of operation left. If the lamp fails to light, the battery should be replaced.
The "ON" lamp is connected to a precision battery test circuit that continuously monitors battery voltage. The LED is
at full brightness with a new 9 Volt battery. As the battery voltage drops during use, the LED brightness will also
decrease. When the LED is barely visible, there will still be 30 minutes or more operating time remaining.
Since the internal circuits are all tightly regulated and the RF output stage has a separate discrete regulator, the
transmitter will continue to operate to a battery voltage of 6.5 Volts. From 6.5 Volts to 6 Volts, the transmitter will still
operate, but with degraded performance. Please note that a weak battery will sometimes light the POWER LED
immediately after turn on, but will soon discharge to the point where the LED will go out, just like a flashlight with
"dead" batteries.
The combination of an accurate battery condition indicator and regulation of all internal circuits provides much longer
battery life, as well as consistent performance over the life of the battery.
4

CONTROLS AND FUNCTIONS

LECTROSONICS
UM190B
OFF ON
LF ROLL OFF
0
AUDIO
LEVEL
–20
ANTENNA
75 Hz
35 150
LF
ROLL-OFF
ADJ