Radio Shack Intercom System 43 3102 User Guide

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43-3102  
OWNER’S MANUAL — Please read before using this equipment.  
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If an icon appears at the end of a  
paragraph, go to the box on that  
page with the corresponding icon  
for pertinent information.  
— Warning  
— Important  
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. — Caution  
° — Hint  
± — Note  
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-019  
This equipment has been tested and found to comply with  
the limits for a Class B digital device, pursuant to Part 15 of  
the FCC Rules. These limits are designed to provide  
reasonable protection against harmful interference in a  
residential installation. This equipment generates, uses and  
can radiate radio frequency energy and, if not installed and  
used in accordance with the instructions, may cause  
harmful interference to radio communications.  
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The FCC Wants You to Know .... 1  
Preparation ................................. 2  
Installing Batteries ................... 2  
Using AC Power ...................... 2  
Using the Intercom’s Channels  
However, there is no guarantee that interference will not  
occur in a particular installation. If this equipment does  
cause harmful interference to radio or television reception,  
which can be determined by turning the equipment off and  
on, the user is encouraged to try to correct the interference  
by one or more of the following measures:  
and Sub-Tones ........................ 3  
Mounting the Intercoms .......... 4  
Operation ................................... 5  
Turning the Intercom On and Off/  
Adjusting the Volume .............. 5  
Calling Another Intercom ........ 5  
Monitoring an Intercom ........... 5  
Connecting an Audio Source .. 5  
Care ........................................... 6  
Service and Repair ..................... 7  
Specifications ............................. 7  
• Reorient or relocate the receiving antenna.  
• Increase the separation between the equipment and  
receiver.  
© 2002 RadioShack Corporation.  
All Rights Reserved.  
RadioShack and RadioShack.com are trademarks  
used by RadioShack Corporation.  
 
1. Insert each AC adapter’s barrel plug into DC 9V on the  
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top of each intercom.  
Important: The  
2. Plug the other end of the adapters into a standard AC  
outlet.  
EPA certified  
RBRC Battery  
®
ino  
Recycling Seal on  
the nickel-cadmium  
(Ni-Cd) battery indicates  
RadioShack is voluntarily  
participating in an industry  
Complete charging takes about 10 to 12 hours. Average  
charging time varies, depending on capacity. Typically, Ni-  
MH (1500 mA/H) batteries charge in about 12 hours. Ni-Cd  
(700 mA/H) batteries charge in about 4 hours.  
part  
Per  
program to collect and recycle  
these batteries at the end of their  
useful life, when taken out of  
service in the United States or  
Canada. The RBRC program  
provides a convenient alternative  
to placing used Ni-Cd batteries  
into the trash or the municipal  
waste stream, which may be illegal  
in your area. Please call 1-800-  
THE-SHACK (1-800-843-7422) for  
information on Ni-Cd battery  
recycling and disposal bans/  
restrictions in your area.  
When charging is complete, unplug the AC adapter from the  
power source, then disconnect it from DC 9V.  
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The intercoms use radio frequencies called channels to  
communicate with each other. Your intercoms have four  
channels. The intercoms also use sub-tones within the  
channels to help eliminate interference between intercoms,  
even if someone is using another intercom set to the same  
channel. Your intercoms have eight sub-tones.  
RadioShack’s involvement in this  
program is part of the company’s  
commitment to preserving our  
environment and conserving our  
natural resources.  
The channels and sub-tones let you set each intercom so  
they can:  
• communicate with each other  
• communicate with additional intercoms you purchase.  
not communicate with other intercoms  
For example, if you have more than two intercoms installed  
in your home, you can set them so the intercom you  
installed at the front door communicates only with the  
intercom you installed in the kitchen (so guests at the door  
can announce themselves to somebody working in the  
kitchen).  
You must set any two intercoms to the same channel and  
sub-tone for them to communicate with each other.  
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Each intercom has a group of DIP switches inside the  
battery compartment. Use an object such as a straightened  
paper clip to set the DIP switches.  
1. On each intercom, slide the battery compartment cover  
on the back of the intercom in the direction of the arrow  
to remove it.  
3
 
2. For each intercom, select the channel you  
want to use by setting the last two DIP  
switches (labeled CH) inside the battery  
compartment to the channel you want to use.  
The chart on the right shows the positions to  
which you can set these DIP switches.  
4
5
CH  
1
2
3
4
Pepar  
at  
ion  
• If you want all the intercoms to communicate with  
each other at the same time, set all intercoms to the  
same channel and sub-tone (see also Step 3).  
• If you want one intercom to communicate only with  
one other intercom, set only those two intercoms to  
the same channel and sub-tone.  
3. For each intercom, select the sub-tone  
1
2
3
you want to use by setting the first three  
DIP switches (labeled SUB TONE) inside  
the battery compartment to the sub-tone  
you want to use. The chart on the right  
shows the positions to which you can  
set these DIP switches.  
1
2
3
4
5
6
7
8
• If you want all the intercoms to  
communicate with each other at the  
same time, set all intercoms to the  
same channel and sub-tone (see also Step 2).  
• If you receive interference on a channel you selected  
in Step 2, set each intercom to a different sub-tone.  
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You can place the intercoms on a desk or table, or mount  
them directly on a wall. To mount the intercoms on a wall,  
you need two screws for each intercom (not supplied), with  
heads that fit into the keyhole slots on the back of the  
intercom.  
Be sure you install the  
intercoms at least 10 feet away  
from each other. Placing the  
intercoms too close together  
produces feedback (a squeal or  
howl from the speakers). The  
intercoms can transmit up to  
200 feet line of sight.  
For each intercom, follow these steps to mount it on a wall.  
1. Drill a hole slightly smaller than the screws you are  
15  
16  
using to mount the intercoms, measure a length 3 /  
inches (100 mm) from that hole, then drill a second hole.  
Be sure all intercoms you plan  
to use are turned on and  
adjusted to the desired volume.  
2. Thread a screw into each hole, letting the left screw’s  
Be sure both the intercom you  
are calling and the intercom  
you are using to make the call  
are set to the same channel  
and sub-tone (see “Setting the  
Channel and Sub-Tone” on  
Page 3).  
1
4
head extend about / inch (6.5 mm) from the wall and the  
1
8
right screw’s head about / inch (3.5 mm) from the wall.  
3. Align the intercom’s keyhole slots with the mounting  
screws and slide the intercom down to secure it.  
4. Lift and rotate the antenna up so it stands vertically.  
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To turn on the intercom, rotate VOLUME counterclockwise  
until it clicks. POWER/BATT LOW lights. Then adjust  
VOLUME to a comfortable listening level.  
To turn off the intercom, rotate VOLUME clockwise until it  
clicks. POWER/BATT LOW turns off.  
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1. Press CALL once. TRANSMIT lights. Each intercom  
that is on and set to the selected channel and sub-tone  
sounds a tone for about 3 seconds.  
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2. Hold down TALK and speak in a normal voice after you  
preat  
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hear the beep. When you finish speaking, release TALK  
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and listen for the response.  
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Calling Another Intercom  
You can set any intercom so it continuously transmits  
sounds from the area where it is located to another  
intercom. You can monitor only one intercom at a time.  
Only one party can talk on a  
channel at a time.  
1. Press LOCK on the intercom in the area you want to  
TRANSMIT on the intercom you  
are using remains lit as long as  
you hold down TALK or CALL.  
monitor. TRANSMIT flashes.  
2. When you finish monitoring, release the lock by  
pressing TALK on the intercom in the area you are  
monitoring. TRANSMIT turns off.  
RECEIVE/BUSY lights when  
you receive a voice message or  
when you are monitoring a  
locked intercom. RECEIVE/  
BUSY flashes if the channel is  
being used.  
After pressing LOCK on an intercom, you cannot call or talk  
to that intercom until you press TALK to release the lock.  
Connecting a Standard  
Audio Source  
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If your audio source’s cable does  
not have the appropriate connector  
to attach to the intercom, use an  
adapter, available at your local  
RadioShack store or at  
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To transmit audio to each intercom, you can connect one  
intercom to an optional audio source such as a radio, tape  
player, or CD player using an audio cable (not supplied).  
Then, when you turn on the audio source, the intercom  
where the audio source is connected broadcasts the sound  
RadioShack.com.  
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to the other intercoms.  
5
 
Insert the cable’s plug into AUX INPUT on the top of the  
intercom, then connect the other end of the cable to the audio  
source’s output jack (such as AUX OUT or TAPE OUT).  
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If you use the AUX  
broadcasting feature and also  
use the weather radio inputs,  
you MUST connect the  
Follow the instructions in the owner’s manual for your audio  
equipment to play audio.  
Weatheradio alarm’s output to  
the unit that is using the AUX  
broadcasting feature. The  
weather radio inputs must not  
be connected to a unit that is  
RECEIVING the broadcast.  
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To transmit weather alerts to each intercom, you can  
connect one intercom to a weather radio’s alarm output  
terminal. This lets you hear any weather alerts on any  
intercom. Then, when a weather alert sounds, the intercom  
where the weather radio is connected broadcasts the alert  
to the other intercoms.  
Always connect the weather  
radio’s alarm output to the  
intercom you frequently use to  
broadcast.  
Connect the WX INPUT terminals on the top of the intercom to  
your weather radio’s ALARM OUT terminals. Follow the  
instructions in the owner’s manual for your weather radio so  
it sounds a weather alarm using its alarm output terminals.  
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Care  
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Connecting a Weather Radio  
If you connect an intercom to  
both a weather radio and an  
audio source and both sources  
are playing at the same time,  
the intercom always sounds the  
weather alert first.  
To remove wires you connected to your intercom’s WX  
INPUT terminals, use a pointed object such as a  
straightened paper clip to press the orange tabs under the  
wires, then gently pull out the wires.  
Both the RadioShack Cat. No.  
12-250 and 12-258  
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To listen to a connected audio source or weather radio, turn  
on the connected audio source, then adjust VOLUME on  
each intercom to a comfortable listening level.  
Weatheradio (not supplied)  
have alarm output terminals you  
can use to connect to the  
intercoms.  
When the input source signal stops, the intercom  
automatically resumes normal intercom mode.  
Listening to an Audio Source  
Each intercom can broadcast  
from a connected audio source  
only when the channel to which  
it is set to is not being used to  
transmit voice from one  
You cannot listen to a broadcast or Weatheradio while  
calling or talking until you turn off or disconnect the input  
signal. .  
intercom to another.  
You can broadcast from only  
one intercom at a time.  
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Keep the intercoms dry; if they get wet, wipe them dry  
immediately. Use and store the intercoms only in normal  
temperature environments. Handle the intercoms carefully;  
do not drop them. Keep the intercoms away from dust and  
dirt, and wipe them with a damp cloth occasionally to keep  
them looking new.  
Adjusting VOLUME on the  
intercoms does not change the  
intercom’s input sensitivity.  
The intercom’s built-in ALC  
(automatic level control)  
circuitry keeps the input signal  
from overloading the  
transmitter.  
6
 
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If your intercoms are not performing as they should, take  
them to your local RadioShack store for assistance.  
Modifying or tampering with the intercom’s internal  
components can cause a malfunction and might invalidate its  
warranty and void your FCC authorization to operate them.  
52'%+(+%#6+105  
Receiver Section  
20 dB Quieting Sensitivity (Local) ............................................ 2 µV  
Frequency Accuracy ............................................................. 0 KHz  
Image Rejection (12dB SINAD) ............................................. 32 dB  
Spurious Rejection (12dB SINAD) ......................................... 40 dB  
Channel Selectivity ± 500KHz ............................................... 50 dB  
Squelch Threshold ..................................................... 20 dB SINAD  
S/N at 1mV input, ± 38KHz deviation (A-weight) (@ROP) .... 60 dB  
Distortion at 1K Hz, ± 38K Hz Deviation (@ROP) ..................... 1%  
10% THD Output Power .................................................... 500 mW  
Current Drain at Reference Output ..................................... 160 mA  
Transmitter Section  
RF Power Output at 50.............................................. +3 dBm  
Harmonic and Spurious Radiation Suppression .................... 40 dB  
MIC Input Sensitivity (@38 kHz Deviation) .......................... 2.5 mV  
AUX Input Sensitivity (@38 kHz Deviation) ........................ 150 mV  
Sub Tone Deviation ............................................................. 10 KHz  
Call Tone Deviation ............................................................. 35 KHz  
Alert Tone Deviation ............................................................ 32 KHz  
Total Harmonic Distortion ........................................................... 1%  
Current Drain ........................................................................ 55 mA  
dRepair  
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Srev  
General Performance  
Battery Low Indication ............................................................ 4.0 V  
Minimum Operation Voltage (Battery) ..................................... 3.5 V  
Operation Range (line of sight) .......................................... 200 feet  
Overall Frequency Response (–3 dB Bandwidth) ........ 300 - 10kHz  
Current Drain at Standby Mode ............................................ 18 mA  
Charging Time for 80% ....................................................... 10 hour  
Weather Alarm Input Sensitivity ................................................. 5 V  
VOX Sensitivity ..................................................................... 13 mV  
Specifications are typical; individual units might vary. Specifications  
are subject to change and improvement without notice.  
7
 
Limited Ninety-Day Warranty  
This product is warranted by RadioShack against manufacturing defects in material and workman-  
ship under normal use for ninety (90) days from the date of purchase from RadioShack company-  
owned stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED  
HEREIN, RadioShack 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 LIABIL-  
ITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RE-  
SPECT TO ANY LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE  
OR PERFORMANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WAR-  
RANTY, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVE-  
NIENCE, LOSS OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT,  
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN AD-  
VISED OF THE POSSIBILITY OF SUCH DAMAGES.  
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limita-  
tion of incidental 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, 200 Taylor Street, 6th Floor, Fort Worth, TX 76102  
12/99  
43-3102  
AO0089AAA1  
04A02  
Printed in China  
RadioShack Corporation  
Fort Worth, Texas 76102  
 

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