Audio Technica MTU301 SpectraPulse Wireless Microphone System – Microphone Transceiver Unit MTU301 User Manual Owners Manual

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Document ID	1386648
Application ID	BP7iKs+Az6Sbr2oVMH5MOQ==
Document Description	Owners Manual
Short Term Confidential	No
Permanent Confidential	No
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Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	45.36kB (566985 bits)
Date Submitted	2010-12-07 00:00:00
Date Available	2011-04-11 00:00:00
Creation Date	2010-11-01 12:24:44
Producing Software	Acrobat Distiller 9.2.0 (Windows)
Document Lastmod	2010-11-01 12:24:52
Document Title	Owners Manual
Document Creator	Acrobat PDFMaker 9.1 for Word
Document Author:	jwilson

mtu301 Owner’s Manual
Page 1 of 6
mtu301 Owner’s Manual
Cover:
SpectraPulse® Ultra Wideband Wireless Microphone System
mtu301 Body‐pack Transmitter
Set‐up and Operation
Inside:
This device complies with Part 15 of the FCC rules. Operation is subject to the condition that device does
not cause harmful interference.
This device complies with INDUSTRY CANADA R.S.S. 220 en conformite avec IC:RSS‐220/CNR220
Operation is subject to the following conditions: 1) This device may not cause harmful interference and
2) this device must accept any interference received, including interference which may cause undesired
operation. Changes or modifications not expressly approved by Audio‐Technica could void your
authority to operate this equipment.
Note: This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is unlikely to cause harmful interference. However, if
the equipment does cause harmful interference, the user will be required to correct the interference
at own expense.
CAUTION! Electrical shock can result from removal of SpectraPulse® components' covers. Refer servicing
to qualified service personnel. No user‐serviceable parts inside. Do not expose to rain or moisture. The
circuits inside the SpectraPulse® components have been precisely adjusted for optimum performance
and compliance with federal regulations. Do not attempt to open the rcu104 Receiver Coordinator Unit,
drm141 Digital Receiver Module (main assembly), aci707 Audio Control Interface, mtu101 Boundary
Microphone Transmitter, mtu201 XLR Desk Stand Transmitter, mtu301 Body‐pack Transmitter, or cei007
Charger Encryption Interface. To do so will void the warranty, and may cause improper operation.
Notice to individuals with implanted cardiac pacemakers or AICD devices:
Any source of RF (radio frequency) energy may interfere with normal functioning of the implanted
device. All wireless microphones have low‐power transmitters (less than 0.05 watts output) which are
unlikely to cause difficulty, especially if they are at least a few inches away. Note also that any medical‐
device disruption will cease when the RF transmitting source is turned off. Please contact your
physician or medical‐device provider if you have any questions, or experience any problems with the
use of this or any other RF equipment.
Please note that your SpectraPulse® system operates in a frequency band in a way which may make its
use subject to certain FCC and other regulatory agency restrictions and licensing requirements. No
changes or modifications may be made to this equipment except by the expressly approved responsible
party for compliance. Changes or modifications could void the user’s authority to operate the
mtu301 Owner’s Manual
Page 2 of 6
equipment, and will also void Audio‐Technica warranty coverage. For further information, Please
contact your local office of the FCC as applicable.
Battery precautions
 Each mtu301 Body‐pack Transmitter is powered by 2 AA batteries: AA 1.5V alkaline batteries
(included) or rechargeable SANYO brand AA Nickel Metal Hydride.
 When using rechargeable batteries, always use rechargeable AA NiMH batteries.
 Rechargeable batteries must be charged before initial use or after prolonged non‐use.
 When inserting batteries into the mtu301, observe correct polarity as marked.
 Do not use a leaking battery. If battery leakage occurs, avoid contact with skin. If skin contact
occurs, immediately wash the affected skin area thoroughly with soap and water. If battery
leakage comes into contact with your eyes, immediately flush with water and seek medical
attention.
 Do not expose the batteries to fire. Do not heat, deform, solder, disassemble or modify.
 Do not peel off or damage the outer tube of a battery.
 If batteries become damaged, dispose of properly.
 Please recycle rechargeable batteries.
 Do not use these batteries together with dry cells, other types of batteries, new and old
batteries together, or batteries with different charge levels.
Note: This SpectraPulse® system is approved for indoor use only.
Note: See SpectraPulse® Owner’s Manual for full system specifications.
Contents
What’s in the box
mtu301 Body‐pack Transmitter Installation & Operation
mtu301 Body‐pack Transmitter Controls and Functions
mtu301 Body‐pack Transmitter Specifications
Page x
Page x
Page x
Page x
What’s in the box:
 SpectraPulse® mtu301 Body‐pack Transmitter
 AA 1.5V alkaline batteries (2 batteries per transmitter)
Note: For SpectraPulse® system operation, see SpectraPulse® Owners Manual.
mtu301 Body‐pack Transmitter
Installation & Operation
Thank you for purchasing the mtu301 Body‐pack Transmitter, a component of Audio‐Technica’s award‐
winning SpectraPulse® Ultra Wideband Wireless Microphone System. Please follow the information
contained in this manual closely, and refer to the SpectraPulse® Owners Manual for system operating
instructions.
The mtu301 Body‐pack Transmitter is optimized to work with a number of Audio‐Technica lavalier and
headworn microphones pre‐terminated with a compatible input connector; these wireless microphone
product numbers end with the designation “cW”. The cable connector latches automatically when
inserted into the microphone input jack. To unlatch and remove the connector, pull up on the
connector’s knurled metal collar.
mtu301 Owner’s Manual
Page 3 of 6
The unit provides bias voltage for electret condenser microphones and features 9‐hour battery life. It
also offers an on/off switch, a mute switch, and LEDs indicating power/mute and link status as well as
low‐battery warning. Each mtu301 operates using 2 AA batteries. Standard alkaline or NiMH
rechargeable batteries can be used. With use of an Audio‐Technica [need model number] Charger
available separately, NiMH rechargeable batteries recharge within the unit. They will not overcharge.
To operate the unit:
1. Install batteries
 If you are using alkaline batteries:
a. Insert 2 fresh AA 1.5V alkaline batteries in the mtu301 XLR Body‐pack
Transmitter. (See Battery Selection & Battery Installation, page 6).

If you are using rechargeable batteries:
a. Turn the mtu301 off; the unit must be off when batteries are being charged. (See
Power On/Off, page __).
b. Insert two Nickel Metal Hydride (NiMH) AA rechargeable batteries in the mtu301 XLR
Body‐pack Transmitter. (See Battery Selection & Battery Installation, page __).
c. Plug the DC cable from the (not included‐available separately) [need model number]
Charger into the charging port on the side of the mtu301 unit; plug the Charger into a
standard wall outlet
d. Confirm that the mtu301 yellow Charging LED (next to the charging port) is
illuminated; this will extinguish when charging is complete. A complete charge can
take up to six hours.
e. Disconnect the Charger when the charge is complete.
Note: If the red Charge Error LED (next to the charging port) is illuminated, this indicates
a charging system error. Causes include: non‐NiMH batteries; failed batteries;
incorrectly installed batteries; brief interruption in power. Be certain you are using
properly installed NiMH batteries and reconnect to begin the charging cycle again.
2. Select a unique channel address in the battery compartment of each mtu301 Body‐pack
Transmitter. (1‐7 for the first aci707 audio control interface unit used; 8‐14 for the second
aci707 unit). (See Channel Address Selection, page 6.)
3. Connect your microphone to the audio input jack on the top of the mtu301 Body‐pack
Transmitter. (Use any Audio‐Technica lavalier or headworn wireless microphone whose product
number ends with a “cW”.)
4. Turn on the power switch on the top of each mtu301. The Power LED on the top of the mtu301
will glow blue. (See Power On/ Off, page _.)
5. Confirm link status. If the mtu301 Body‐pack Transmitter is properly linked, the UWB Link LED in
the battery compartment will glow blue, and the top green light on the corresponding aci707
channel will light.
mtu301 Owner’s Manual
Page 4 of 6
6. Confirm mute/live audio status. When the audio is on, the Live Audio LED on the top of the
mtu301 glows green. To change mute status, depress the body‐pack transmitter’s push‐button
switch. When the audio is muted, the Mute LED glows red. (See Audio/Mute LED, page _ .)
7. Confirm battery status. Low battery is indicated by blinking blue power light (at the top of the
mtu301). (See Low Battery Warning, page _.)
8. With the aci707 on and connected as desired, the drm141 connected, and the mtu301 Body‐
pack Transmitter on, speak into the microphone and verify audio operation. Set the input levels
on your connected equipment as needed. You are now set to use the system.
9. Turn the transmitter off when not in use. Remove the batteries if the transmitter is not to be
used for a long period of time.
mtu301
Body-pack Transmitter Controls
1. Battery Selection and Installation
The mtu301 Body‐pack Transmitter operates on two AA batteries (standard alkaline or NiMH
rechargeable). Please make certain that your batteries are fresh or fully charged. Two AA 1.5V alkaline
batteries are included with the mtu301.
a. Open the battery door by sliding the latch toward the top of the unit.
b. Insert two fresh or fully charged AA batteries into the battery compartment, being
careful to observe correct polarity as marked on the battery holder.
c. Close the battery door after step 2 is complete.
2. Channel Address Selection
Channel address selection is via a rotary switch inside the battery compartment. The switch is numbered
for channel addresses 1 through 14; these channel addresses correspond to the audio outputs on the
aci707 unit. Use a small flat‐blade screwdriver to select a different channel address for each transmitter
(you cannot have two transmitters on the same channel address). The Audio Control Interface (aci707)
comes from the factory set for channel addresses 1 through 7. If you wish to use it for channel addresses
8 through 14, change the DIP switch on the back panel of the aci707 as described in the SpectraPulse®
Owners Manual.
3. Mic Gain Switch
Adjust audio gain with this 3‐position gain switch inside the battery compartment, provided for
situations that demand extra sensitive pickup. Begin with the switch in the 0 dB setting; adjust to +6 dB
or +12 dB as needed.
4. Audio Input Jack
The mtu301 Body‐pack Transmitter is equipped with an audio input jack for connection to any Audio‐
Technica lavalier and headworn microphone pre‐terminated with a compatible input connector; these
wireless microphone product numbers end with the designation “cW”.
5. Power On/Off
mtu301 Owner’s Manual
Page 5 of 6
A toggle switch on the top of each body‐pack transmitter turns the unit on and off. The unit must be off
when batteries are being charged.
6. Power LED and Low‐battery Warning
The Power LED on the top of the body‐pack transmitter glows blue to indicate the power is on. When
battery performance is low, the Power LED will blink as a warning. When the system is linked, a bottom
orange LED on the corresponding aci707 channel will illuminate to provide additional indication of low‐
battery status.
7. Audio/Mute LEDs
When a body‐pack transmitter’s audio is on, the Live Audio LED on the top of the mtu301 glows green.
When the audio is muted, the Mute LED glows red. A red light on the corresponding aci707 channel also
indicates when audio is muted.
8. UWB Link LED
The UWB Link LED inside the battery compartment glows blue to indicate the mtu301 is properly linked
to the system. (The top green light on the corresponding aci707 channel also lights.)
9. Push‐button Switch
A push‐button switch on the top of the body‐pack transmitter operates as a mute (press on/off) switch
or a control switch; to change mute status, depress the button. Choose the function of the button (Push
to Talk, Push to Mute, Toggle, and Off) at the SpectraPulse® aci707 Audio Control Interface. (See
SpectraPulse® Owner’s Manual for details.)
10. Charging Port
The DC cable from the separately available Charger plugs into the charging port.
11. Charging LED
This yellow LED illuminates while batteries are being charged; extinguishes when charging is complete.
12. Charge Error LED
This red LED illuminates to indicate a charging system error. Causes include: non‐NiMH batteries; failed
batteries; incorrectly installed batteries; brief interruption in power.
13. Battery Door
Open the battery door by sliding the latch up.
14. Transmitter Mounting Clip
Use the mounting clip to wear the transmitter on a waistband or belt.
mtu301 Owner’s Manual
Page 6 of 6
mtu301 Body‐pack Transmitter Specifications
Input connector
Hirose 4-pin locking, circular. Mates with all pre-terminated AT headworn and lavaliere series microphones for pin-locking connector.
Bias voltage to
mic feed
The mtu201 delivers 11.5V DC to the pin-locking connector in order
to power any of the AT series head-worn or lavaliere microphones.
Battery type
Two 1.5 volt AA alkaline batteries are included. Rechargeable SANYO
brand NiMH AA batteries are recommended; they are included with the
available cei007 Charging/Encryption Interface
Battery life
Approximately 9 hours depending on battery type and use and
pattern
Current
Consumption
190mA at 3V DC
Average RF
power
40 nanowatts
Weight and
Dimensions
81.8mm (3.22 in.) wide, 27.5mm (1.08 in.) deep,
Optional
Encryption
AES level 3, 128 bit
118mm (4.65 in.) height, 227 grams (0.5 lb.) - less batteries

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