Lectrosonics UM450V Instruction Manual page 3

Frequency-Agile UHF Belt-Pack Transmitter
Thank you for selecting the Lectrosonics UM450 frequency agile, belt-pack transmitter. The UM450 combines over 80
years of engineering experience with the very latest components, in a design that addresses the most demanding
professional applications.
The design of the UM450 was the direct result of numerous conversations with users, staging and touring companies
and dealers across the US. The specific concerns and needs brought up in these conversations led directly to the
development of the operational features offered on the UM450. Two hundred fifty six frequencies are user selectable in
100kHz steps to alleviate interference problems in traveling venues, and the low frequency roll-off is user adjustable to
adapt to varying acoustic environments and preferences.
The UM450 is a rugged, machined aluminum package with a removable, spring loaded belt clip. The input section
provides a correct input tap for virtually any microphone or line level audio source. Five volts of bias voltage is avail-
able to power electret mics with either positive or negative bias. Level indicating LEDs are provided on the control
panel to make level settings quick and accurate, without having to view the receiver. The battery compartment ac-
cepts any 9 Volt alkaline battery and makes a positive connection via self-adjusting contacts. The antenna is a detach-
able, locking 1/4 wavelength flexible galvanized steel cable that connects to a 50 Ohm SMA port on the transmitter.
Only the UM450 transmitter is covered in this manual. Companion receivers are covered in separate manuals. The
UM450 will operate with any 400 Series Lectrosonics receiver and a variety of analog receivers in the same frequency
group.
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Rio Rancho, NM