Lectrosonics MM200 - Manual - Manual (Page 3)

Frequency Agile UHF Miniature Belt-Pack Transmitter
INTRODUCTION
Thank you for selecting the Lectrosonics MM200 frequency agile UHF miniature
transmitter. The MM200 combines over 80 years of engineering experience with the
very latest components, in a design that addresses the most demanding profes­
sional applications.
The design of the MM200 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 develop­
ment of the operational features offered on the MM200. Two hundred fifty six fre­
quencies are user selectable in 100kHz steps to alleviate interference problems in
traveling venues.
The MM200 is a rugged, machined stainless steel package with a removable, spring
loaded belt clip. 3.3 Volts of bias voltage is available to power electret mics. 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 accepts AA
alkaline or lithium batteries. The antenna is a detachable, locking ¼ wavelength
flexible bronze cable that connects to a 50 Ohm SMA port on the transmitter.
Only the MM200 transmitter is covered in this manual. Companion receivers are
covered in separate manuals. The transmitter will operate with any 200 Series
Lectrosonics receiver in the same frequency group.
The MM200 transmitter uses a Digital Signal Processor to model the dual band
compander used in the 200 series with the appropriate compandor time constants
and frequency division. Since the signals are converted from analog to digital,
processed and then converted back to analog, there is a delay as with all digital
audio systems. This delay is 1.6 mS or an equivalent audio path length delay
of 1.8 ft.
Rio Rancho, NM – USA 3