Optimus 2-Channel Professional Wireless Audio Link... User manual

Cat. No. 32-1235
OWNER’S MANUAL
Please read before using this equipment.
2-Channel Professional
Wireless Audio Link S
y
stem
32-1235.fm Page 1 Monday, August 9, 1999 3:32 PM

2
FEATURES
Your Optimus 2-Channel Profession-
al Wireless Audio Link System is de-
signed for use with public address
systems, musical instrument amplifi-
ers, headset microphones, or other
audio systems. The system’s long
range (150 feet), wide-range frequen-
cy response (100–12,000 Hz), good
signal-to-noise ratio (90 dB), and low
distortion (1.0%) let you use it any-
where you would use a conventional
microphone.
The transmitter’s innovative design
lets you link musical instruments,
headset microphones, or other audio
sources to a central mixer or amplifier
using state-of-the-art 170 MHz FM
wireless technology.
The transmitter’s low-battery indicator
and three-position switch help you
avoid last-minute battery failures.
The receiver has both microphone-
and line-level outputs for easy con-
nection to any amplifier, mixing board,
or recorder, and you can use both out-
puts at the same time. And, the receiv-
er’s volume control lets you easily
balance the receiver’s output with oth-
er sound sources.
Be sure to read this manual complete-
ly before you use the system.
Note: You need one 9-volt battery
(not supplied) to power the system.
Warnin
g
:To prevent fire or shock
hazard, do not expose this product
to rain or moisture.
This symbol is intended to alert you to
the presence of uninsulated danger-
ous voltage within the product’s enclo-
sure that might be of sufficient
magnitude to constitute a risk of elec-
tric shock. Do not open the product’s
case.
This symbol is intended to inform you
that important operating and mainte-
nance instructions are included in the
literature accompanying this product.
FCC NOTICE
This wireless audio link system com-
plies with Part 90 of
FCC Rules
. There
are two frequencies available for the
system. You must get a license for
each frequency you plan to use before
you use the system (one license can
include both frequencies). Licensabili-
ty depends on how you will use the
system.
Look in your local phone book for the
nearest FCC office and contact them
to get the necessary application.
RISK OF ELECTRIC SHOCK.
DO NOT OPEN.
CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK, DO NOT REMOVE
COVER OR BACK. NO USER-SERVICE-
ABLE PARTS INSIDE. REFER SERVIC-
ING TO QUALIFIED PERSONNEL.
CAUTION
!
!
© 1997 Tandy Corporation.
All Rights Reserved.
Optimus and RadioShack are registered trademarks used by Tandy Corporation.
32-1235.fm Page 2 Monday, August 9, 1999 3:32 PM

3
USING THE SYSTEM
PREPARING THE
TRANSMITTER
The transmitter requires a 9-volt bat-
tery for power. For the best perfor-
mance and longest life, we
recommend an alkaline battery such
as RadioShack Cat. No. 23-553. You
also need to set the transmitter to the
desired channel. Follow these steps to
set the transmitter’s channel and in-
stall its battery.
1. Using the tip of a pen, slide the
battery compartment lock switch
in the direction of the arrow.
2. Remove the transmitter’s battery
compartment cover by pressing it
in the direction of the arrow.
3. Set the channel selector switch
inside the battery compartment to
the desired channel.
4. Install a 9-volt battery by attaching
it to the battery clip inside the
compartment.
5. Replace the cover and secure it
with the lock switch.
Caution: Use only a fresh battery of
the required size and type. Never
leave a weak or dead battery inside
the transmitter. Even leak-proof bat-
teries can leak damaging chemicals.
The red BATT LOW indicator flickers
when you turn on the transmitter. If the
indicator stays on, replace the battery.
CONNECTING THE
RECEIVER TO AN
AMPLIFIER, MIXER, OR
TAPE RECORDER
Connect the receiver to an amplifier,
mixer, or tape recorder using either its
LINE or AUDIO output.
To connect using the LINE jack, con-
nect a shielded audio cable’s phono
plug to the receiver’s LINE jack. Con-
nect the other end to a line-level input
on your amplifier, mixer, or tape re-
corder.
To connect using the AUDIO jack, con-
nect a shielded audio cable’s 1/4-inch
mono phone plug to the receiver’s AU-
DIO jack. Connect the other end to a
microphone-level input on your ampli-
fier, mixer, or tape recorder.
Lock
Switch
Channel
Selector Switch
32-1235.fm Page 3 Monday, August 9, 1999 3:32 PM

4
POWERING THE
RECEIVER
The receiver operates from the sup-
plied 12-volt DC power adapter.
Cautions:
• Use only the supplied adapter. If
you lose or damage this adapter,
order a replacement from your
local RadioShack store. Using
other adapters could damage the
receiver.
• Always plug the adapter into the
receiver’s DC 12V jack first, and
always unplug the adapter from
the AC outlet first.
1. Be sure the receiver’s POWER
button is out (off) before you con-
nect the adapter.
2. Plug the adapter’s small plug into
the receiver’s DC 12V jack.
3. Plug the other end of the adapter
into a standard AC outlet.
SETTING THE
RECEIVER’S CHANNEL
Set the channel selector switch on the
back of the receiver to the same chan-
nel as the transmitter.
CONNECTING AN AUDIO
SOURCE
You can connect a line-level source
(such as an electronic keyboard, mu-
sical instrument microphone, or elec-
tric guitar) or a microphone-level
source (such as a headset micro-
phone) to the transmitter.
To connect a line-level source to the
transmitter, use a cable that ends in a
1/4-inch phone plug. Plug one end of
the cable into the transmitter’s AUX
jack. Plug the other end into the audio
source’s output jack.
Amplifier
Channel Selector
Switch
1/4-Inch Phone Plug
32-1235.fm Page 4 Monday, August 9, 1999 3:32 PM

5
To connect a microphone-level source
to the transmitter, use a cable that
ends in a 1/8-inch phone plug. Plug
one end of the cable into the transmit-
ter’s MIC jack. Plug the other end into
the audio source’s output jack.
Note: If your audio source’s cable
does not end in the type of jack used
by the transmitter, you can get an
adapter from your local RadioShack
store.
SETTING THE
TRANSMITTER INPUT
SENSITIVITY LEVEL
Your transmitter is designed to oper-
ate with musical instruments, micro-
phones, and other audio devices. To
get the best performance from the
system, you need to set the transmit-
ter input sensitivity to match the
source.
The factory setting should be suitable
for most uses. If you experience very
low volume or distorted sound, follow
these steps to adjust the sensitivity.
1. Using the tip of a pen, unlock the
battery compartment lock switch
and remove the battery cover.
2. Use a small flat-head screwdriver
to adjust the sensitivity adjustment
control in the battery compart-
ment.
• If you need to set the receiver’s
volume control to a very high
setting to be able to hear the
audio source, turn the sensitiv-
ity adjustment clockwise about
1/8to 1/4turn and test the system
again.
• If the audio is distorted or if you
need to turn the receiver’s vol-
ume to a very low level to hear
clear audio, turn the sensitivity
adjustment counterclockwise
about
1/8to 1/4turn and test the
system again.
3. Replace the cover and secure it
with the lock switch.
1/8-Inch Phone Plu
g
Sensitivit
y
Ad
j
ustment Control
Lock
Switch
32-1235.fm Page 5 Monday, August 9, 1999 3:32 PM

6
USING MORE THAN ONE
WIRELESS SYSTEM
You need a compatible receiver for
each wireless transmitter you plan to
use. You can use up to three wireless
systems at the same time. However,
to avoid interference, you must set
each system to operate on a different
channel, and you must not set any two
systems to adjacent channels. The fol-
lowing table lists valid three-channel
combinations.
* This wireless system is not avail-
able with Channels A and H, but
other compatible systems do have
this channel.
3-Channel
Systems
A* C F
A* D F
B D G
B D H*
B E G
B E H*
C E H*
C F H*
32-1235.fm Page 6 Monday, August 9, 1999 3:32 PM

7
OPERATION
Notes:
• You must connect the receiver to
an audio system and fully extend
the receiver’s antenna.
• You must connect the transmitter
to an audio source.
• Leave the transmitter’s OFF/
STANDBY/ON switch set to
STANDBY or ON whenever the
receiver is on. This keeps the sys-
tem from producing a loud hissing.
1. Turn on your amplifier, tape
recorder, mixing board, and other
necessary audio system compo-
nents. Set their volume controls
(or input level controls) to moder-
ate settings.
2. Set the receiver’s VOLUME control
to its minimum position.
3. Press POWER to turn on the
receiver.
4. Set the transmitter’s OFF/
STANDBY/ON switch to ON. The
receiver’s READY indicator lights.
5. Turn on the audio source and
adjust the receiver’s VOLUME con-
trol to the desired level.
Note: Experiment with the receiver’s
volume setting and the settings of oth-
er components in your audio system
for the best results. If you are using a
source that has a variable output con-
trol such as a musical instrument, be
sure that you have adjusted the vol-
ume with the instrument at the highest
level you intend to use.
USING THE STANDBY
SETTING
The transmitter’s STANDBY setting
lets you turn off the audio source sig-
nal without turning off the transmitter.
If you set the switch to OFF while your
amplifier is on, there is a loud hiss.
There is no hiss when you set the
switch to STANDBY, but the audio
source is not sent to the amplifier.
To conserve battery power, be sure to
set the switch to OFF when you finish
using the transmitter.
USING THE BELT CLIP
For hand-free carrying of the transmit-
ter, slide the belt clip over your belt.
32-1235.fm Page 7 Monday, August 9, 1999 3:32 PM

8
MAINTENANCE
Your Optimus 2-Channel Professional Wireless Audio Link System is an example of
superior design and craftsmanship. The following suggestions will help you care for
the system so you can enjoy it for years.
Keep the system dry. If it gets wet, wipe it dry immediately. Liquids
might contain minerals that can corrode the electronic circuits.
Use and store the system only in normal temperature environments.
Temperature extremes can shorten the life of electronic devices,
damage batteries, and distort or melt plastic parts.
Keep the system away from dust and dirt, which can cause prema-
ture wear of parts.
Handle the system gently and carefully. Dropping it can damage cir-
cuit boards and cases and can cause the system to work improperly.
Wipe the system with a damp cloth occasionally to keep it looking
new. Do not use harsh chemicals, cleaning solvents, or strong deter-
gents to clean the system.
Modifying or tampering with the system’s internal components can cause a mal-
function and could invalidate your system’s warranty and void your FCC authoriza-
tion to operate it. If your system is not performing as it should, take it to your local
RadioShack store for assistance.
32-1235.fm Page 8 Monday, August 9, 1999 3:32 PM

9
SPECIFICATIONS
TRANSMITTER
Sensitivity:
MIC Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 mV ±5 dB @ ±12 kHz FM
AUX Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 mV ±5 dB @ ±12 kHz FM
Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100–12,000 Hz
RF Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mW (Max)
Current Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 mA(Average)
Battery Life (Alkaline) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Hour(Average)
Operating Frequencies:
RECEIVER
Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 µV (with S/N @ 20 dB)
S/N Ratio (@ 1mV Input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 dB, A Weighted
Output Power:
LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 mV
AUDIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 mV
Total Harmonic Distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0% (Typical)
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Volts DC, 100 mA
Operating Frequencies: . . . . . . . . . . . . . . . . . . . (See table in Transmitter section)
Specifications are typical; individual units might vary. Specifications are subject to
change and improvement without notice.
Channel Frequency
B 169.505 MHz
C 170.245 MHz
D 170.305 MHz
E 171.045 MHz
F 171.105 MHz
G 171.845 MHz
32-1235.fm Page 9 Monday, August 9, 1999 3:32 PM

10
NOTES
32-1235.fm Page 10 Monday, August 9, 1999 3:32 PM

11
32-1235.fm Page 11 Monday, August 9, 1999 3:32 PM

RadioShack
A Division of Tandy Corporation
Fort Worth, Texas 76102
9A7 Printed in Hong Kong
Limited One-Year Warranty
This product is warranted by RadioShack against manufacturing defects in material and workman-
ship under normal use for one (1) year from the date of purchase from RadioShack company-owned
stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED HEREIN, Ra-
dioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES, INCLUDING
THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED
IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES CONTAINED
HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL HAVE NO LIABILITY OR RE-
SPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY
LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE OR PERFOR-
MANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY, IN-
CLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE, LOSS
OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT, SPECIAL, INCIDEN-
TAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
Some states do not allow the limitations on how long an implied warranty lasts or the exclusion of in-
cidental or consequential damages, so the above limitations or exclusions may not apply to you.
In the event of a product defect during the warranty period, take the product and the RadioShack
sales receipt as proof of purchase date to any RadioShack store. RadioShack will, at its option, un-
less otherwise provided by law: (a) correct the defect by product repair without charge for parts and
labor; (b) replace the product with one of the same or similar design; or (c) refund the purchase
price. All replaced parts and products, and products on which a refund is made, become the prop-
erty of RadioShack. New or reconditioned parts and products may be used in the performance of
warranty service. Repaired or replaced parts and products are warranted for the remainder of the
original warranty period. You will be charged for repair or replacement of the product made after the
expiration of the warranty period.
This warranty does not cover: (a) damage or failure caused by or attributable to acts of God, abuse,
accident, misuse, improper or abnormal usage, failure to follow instructions, improper installation or
maintenance, alteration, lightning or other incidence of excess voltage or current; (b) any repairs
other than those provided by a RadioShack Authorized Service Facility; (c) consumables such as
fuses or batteries; (d) cosmetic damage; (e) transportation, shipping or insurance costs; or (f) costs
of product removal, installation, set-up service adjustment or reinstallation.
This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state.
RadioShack Customer Relations, Dept. W, 100 Throckmorton St., Suite 600, Fort Worth, TX 76102
We Service What We Sell
3/97
32-1235.fm Page 12 Monday, August 9, 1999 3:32 PM