Zaxcom MB1 Users Manual

Revision 0: Initial Draft Copy: Confidential
Zaxcom Inc. 140 Greenwood Ave, Bldg #2 Midland Park, NJ 07432

MB1 Digital Wireless Microphone Transmitter

Instruction Manual

Zaxcom Inc.

www.Zaxcom.com

Zaxcom Transmitter Operating Instructions

Initial draft copy

The external connections on the MB1 transmitter consist of a 4 pin microphone connector and an SSMA
antenna connector. Only use the proper antenna and microphone supplied by Zaxcom. Do not operate the
transmitter without the antenna. When mounting the transmitter be sure to always leave at least 2.5 cm
clearance between the antenna and any other objects.

The user interface for the transmitter consists of 3 LED digits and 4 buttons:
PWR = Power on/off: Hold this key for 3 seconds to turn the transmitter on or off.
FNCT = Function/menu page select: Press to cycle through each menu page.
INC = Increment the current parameter selected by the FNCT key.
DEC = Decrement the current parameter selected by the FNCT key.

BATTERY

The battery module consists of a 4 Volt Lithium Ion rechargeable battery. The battery slides on from left
to right and snaps in place. In order to remove the battery module, firmly slide the silver battery release up
and then slide the battery to the left.

Nominal operating voltage: 3.8 volts at 320 milliamps
Maximum RF output power: 50 milliWatts
Antenna impedance: 50 Ohms

When the battery is in place, the unit will boot up in about 2 seconds. The display will default to a pacifier
mode where the INC and DEC keys have no function and a single center LED segment stripes across the
screen every second. If this display does not come up after the battery has been installed, check to be sure
the battery is fully charged. The battery must supply between 3.4 and 4.5 volts for the transmitter to
operate properly. If the battery voltage falls below 3.3 volts the transmitter will partially power down in a
reset mode. To prevent permanent damage to the battery, do not leave the battery in place so that it fully
discharges.

Transmitter Menu Pages

The Transmitter has a few menu pages which allow the user to change various settings. Note that the
transmitter will reset all of its settings back to factory default when powered up.

PACIFIER PAGE

At power-up the transmitter will display a pacifier page. The INC and DEC keys have no functionality in
this page.

AUDIO GAIN PAGE

Press the FNCT key once and the LEDs will go blank. When audio is applied to the microphone input the
LEDs will display the audio level. The mic preamp gain may be adjusted in this page by pressing the INC
or DEC keys repeatedly. The mic gain is set to maximum at boot up and should provide normal operation
at this setting.

CHANNEL SELECT PAGE

Press the FNCT key again to display the Channel Select page.
This page will display the current channel code. To change channels press the INC and DEC keys.
The transmitter will operate at 1 of the 16 channels (spaced 1.920 MHz) as shown below: