SpeakerCraft STT 2.0 User manual

Thank you for choosing SpeakerCraft. Read this manual carefully to get the best performance from this unit.
Owners Manual
STT 2.0
Digital AM/FM Twin Tuner

2
Important Safety Instructions
CAUTION
•DO NOT REMOVE THE PROTECTIVE HOUSING USING
SCREWDRIVER.
•IF THIS PRODUCT DEVELOPS TROUBLE, MAKE A CONTACT
WITH OUR SERVICEMAN, AND DO NOT USE THE PRODUCT IN
A TROUBLED STATE.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT
REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS
INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated "dangerous voltage" within
the product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to
persons.
The exclamation point within an equilateral triangle
is intended to alert the user to the presence of
important operating and maintenance (servicing)
instructions in the literature accompanying the
appliance.
WARNING : TO PREVENT FIRE OR SHOCK
HAZARD, DO NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE.
Important Safety Instructions
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with dry cloth.
7) Do not block any ventilation openings. Install in accordance
with the manufacturer's instructions.
8) Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers)
that produce heat.
9) Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades with
one wider than the other. A grounding type plug has two
blades and a third grounding prong. The wide blade or the
third prong are provided for your safety. If the provided
plug does not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
10) Protect the power cord from being walked on or pinched
particularly at plugs, convenience receptacles, and the point
where they exit from the apparatus.
11) Only use attachments/accessories specified by the
manufacturer.
12) Use only with the cart, stand, tripod,
bracket, or table specified by the
manufacturer, or sold with the
apparatus. When a cart is used,
use caution when moving the cart/
apparatus combination to avoid injury
from tip-over.
13) Unplug this apparatus during lightning
storms or when unused for long periods of time.
14) Refer all servicing to qualified service personnel. Servicing
is required when the apparatus has been damaged in any
way, such as power-supply cord or plug is damaged, liquid
has been spilled or objects have fallen into the apparatus,
the apparatus has been exposed to rain or moisture, does
not operate normally, or has been dropped.
•Do not expose this apparatus to dripps or splashes.
•Do not place any objects filled with liquids, such as vases,
on the apparatus.
•Do not install this apparatus in a confined space such as a
book case or similar unit.
•The apparatus draws nominal non-operating power from the
AC outlet with its POWER switch in the off position.
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. 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:
• Reorient or relocate the equipment and/or the receiving
antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for
help.
CAUTION
Changes or modifications to this equipments not expressly
approved by the manufacturer for compliance will void the
user's warranty.

3
Contents Remote Control Unit
Read this before operation
•Choose the installation location of your unit carefully. Avoid
placing it in direct sunlight or close to a source of heat. Also
avoid locations subject to vibrations and excessive dust, heat,
cold or moisture.
•Do not open the cabinet as this might result in damage to the
circuitry or electrical shock. If a foreign object should get into
the set, contact your dealer.
•When removing the power plug from the wall outlet, always
pull directly on the plug, never yank the cord.
•Do not attempt to clean the unit with chemical solvents as this
might damage the finish. Use a clean, dry cloth.
•Keep this manual in a safe place for future reference.
Maintenance
If the surface of the unit gets dirty, wipe with a soft cloth or
use diluted mild soap liquid. Be sure to remove any excess
completely. Do not use thinner, benzine or alcohol as they may
damage the surface of the unit.
Before Use
CAUTION
The product shall not be exposed to dripping or splashing and
that no object filled with liquids, such as vases, shall be placed
on the product.
Do not install this equipment in a confined space such as a
book case or similar unit.
1Remove the battery compartment cover.
2Insert two“AAA“ (R03, UM-4) dry batteries. Make sure that the
batteries are inserted with their positive “+“ and negative “_“
poles positioned correctly.
3Close the cover.
Battery Replacement
If the distance required between the remote control unit and
main unit decreases, the batteries are exhausted. In this case
replace the batteries with new ones.
Precautions concerning batteries
•Be sure to insert the batteries with correct positive “+“ and
negative “_“ polarities.
•Use batteries of the same type. Never use different types of
batteries together.
•Rechargeable and non-rechargeable batteries can be used.
Refer to the precautions on their labels.
•When the remote control unit is not to be used for a long time
(more than a month), remove the batteries from the remote
control unit to prevent them from leaking. If they leak, wipe
away the liquid inside the battery compartment and replace the
batteries with new ones.
•Do not heat or disassemble batteries and never dispose of old
batteries by throwing them in a fire.
The provided Remote Control Unit allows the unit to be operated
from a distance.
When operating the remote control unit, point it towards the
REMOTE SENSOR on the front panel of the unit.
•Even if the remote control unit is operated within the effective
range, remote control operation may be impossible if there are
any obstacles between the unit and the remote control.
•If the remote control unit is operated near other appliances
which generate infrared rays, or if other remote control
devices using infrared rays are used near the unit, it may
operate incorrectly. Conversely, the other appliances may
operate incorrectly.
Battery Installation
Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
BeforeUse .............................................. 3
RemoteControlUnit..................................... 3
Connection ............................................. 4
Names of Each Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
RadioReception......................................... 8
PresetTuning............................................ 9
Troubleshooting........................................10
Specifications ..........................................11

4
Connection
TUNER IN TUNER IN
R LRL
Amplifier Amplifier
CAUTION
Turn off the power of all the equipment before making connections.
Read instructions of each component you intend to use with this unit.
•Be sure to insert each plug securely. To prevent hum and noise, do not bundle the connection
cords with the power cord.
A B CEF
D
RACK MOUNT ANGLE KIT
1. Remove the screws and washers from each side of the
STT 2.0.
2. Using the provided screws, attach the mount angles to
the STT 2.0.
(L: left, R: right)

Connection
5
CAUDIO OUT
Connect the component with RCA pin cords. Make sure to
connect :
white plug wwhite jack(L:left)
red plug wred jack(R:right)
DPower cord (AC)
Be sure to connect the power cord to an AC outlet which
supplies the correct voltage.
Hold the power plug when plugging or unplugging the power
cord.
EIR INPUT
Provides a direct IR infrared connection and eliminates the
need for an external IR infrared emitter.
FRS-232
Provides 2-way serial communication.
(see page 12 for RS-232 commands)
AFM Antenna
Connect an outdoor FM antenna to the FM 75 ohm socket.
Generally, a 3-element antenna will be sufficient; if you live
in an area where the FM signals are particularly weak, it
may be necessary to use one with 5 or more elements.
If standard FM broadcast frequencies are available via your
cable service, you may connect your 75 ohm FM antenna
jack to your cable system. Please contact your cable
service to discuss this option.
BAM Indoor Loop Antenna
The high-performance AM loop antenna provided with this
unit is sufficient for good reception in most areas.
To stand the loop antenna on a surface, fix the claw to the
slot.
1 2
Connect the loop antenna's wires to the AM antenna
terminals as shown.
How to connect
Press the lever, insert the end of the cord, then release the
lever. Make sure it is fastened securely by pulling the cord
lightly. Make sure only the bare, stripped wire is inserted in
the jack and that no plastic insulation is preventing contact
between the antenna wire and terminal.
Place the antenna on a shelf, for example, or hang it on a
window frame, etc., in the direction which gives the best
reception, as far away as possible from the entire system,
speaker cords and the power cord, to prevent unwanted
noise.
•If the AM loop antenna provided does not deliver sufficient
reception (often due to being too far from the transmitter or
in a concrete building, etc.), it may be necessary to use an
outdoor AM antenna.
Use either a high quality commercial AM antenna or, if not
available, an insulated wire more than 15 ft (5 m) long, strip
one end, and connect this to the terminal as shown.
The antenna wire should be strung outdoors or indoors near
a window. For better reception, connect the GND terminal to
a reliable ground.
Note:
Even when using an outdoor AM antenna, do not disconnect
the AM loop antenna.

6
Names of Each Control
CE F G H IDBJ
K K
E F G H ID JA
Buttons for TUNER 1 Buttons for TUNER 2
C
J
H
E
F
G
D
I
J
H
E
F
G
D
I

Names of Each Control
7
Note:
To simplify explanations, instructions refer to names of buttons and controls on
the front panel, making no mention of the use of remote control unit.
The equipment draws nominal non-operating power from the AC outlet with
its POWER switch in the OFF position.
AREMOTE SENSOR
When operating the STTR remote control unit, point it towards the REMOTE
SENSOR.
BSTANDBY indicator
This indicator lights when the unit is in the standby mode.
When the unit is turned on, it goes off.
CPOWER switch
Press this switch to turn the unit on or off.
DFM button, AM button
Use these buttons to select FM or AM.
EFM MODE button
Use this button to select stereo or monaural.
FPRESET button
Use this button to select the preset tuning mode.
GDIRECT button
Use this button to select the manual tuning mode.
You can use the numeric buttons to directly input frequency numbers.
HMEMORY button
Use this button to store preset channels into memory.
ITUNING/PRESET buttons
Use these buttons to tune in a station.
JNumeric buttons
These buttons are used either to input frequency numbers or to select preset
stations.
KDisplay
Names of Each Control

8
Radio Reception
When the TUNING/PRESET button is pressed momentarily (0.5
second or less), the frequency changes by a fixed step.
FM : 0.2 MHz steps
AM : 10 kHz steps
Press the TUNING/PRESET button repeatedly until the station
you want to listen to is found.
Pressing this button alternates between Stereo mode and
Mono mode.
Stereo
FM stereo broadcasts are received in stereo and the
"STEREO" indicator lights in the display.
Mono
To compensate for weak FM stereo reception, select this
mode. Reception will now be forced monaural, reducing
unwanted noise.
1Press the POWER switch to turn the unit on.
2Select the AM or the FM band by pressing the corresponding
button.
3Press the DIRECT button to select the manual tuning mode.
4Select the station you want to listen to.
•"TUNED" is displayed when a broadcast is correctly tuned in.
AAuto Selection
FM MODE Button
Example
To select FM 88.30 MHz : 8-8-3
To select AM 1220 kHz : 1-2-2-0
• When no button is pressed for 3 seconds, the mode will be
cancelled.
1 32 4 32 4
TUNER 1 TUNER 2
FM MODE
(TUNER 1)
FM MODE
(TUNER 2)
Hold down the TUNING/PRESET button for 0.5 to 2 seconds.
When a station is tuned in, the tuning process will stop
automatically.
If you want to stop the tuning process, press the TUNING/
PRESET button.
BManual Selection
(Selecting stations which cannot be tuned automatically)
CDirect Tuning
Input the frequency numbers with the numeric buttons.

9
Preset Tuning 1
5While the MEMORY indication is flashing select the preset
you would like to use for this station by EITHER:
Scroll up or down using the TUNING/PRESET buttons until the
preset is displayed. Then press the MEMORY button to store
21 5
3
5
4
21 5
3
5
4
TUNER 1 TUNER 2
5 5
Manual Memory Presetting
You can store your favorite FM and AM stations into any of the 30
preset locations by:
1Select the AM or FM band by pressing the corresponding
band button.
2Press the DIRECT button to select the “manual tuning” mode.
3Select the station you would like to store by scrolling through
the station using the TUNING/PRESET buttons or directly tune
the station by using the numeric buttons.
4Once the station is tuned, press the MEMORY button. To store more stations, repeat steps 3through
5.
OR enter the 2-digit preset number using the numeric pad. (For
instance “05” will store the station in preset number 5. “25”
will store the station in preset location 25.) The preset will
automatically be stored and the memory indication will stop
flashing.

10
Troubleshooting
If you experience any problems with the unit, please take a
moment to look through this chart and see if you can solve the
problem yourself before you call your dealer or service center.
No power
•Check the connection to the AC power supply. Check and
make sure the AC source is not a switched outlet and that, if
it is, the switch is turned on. Make sure there is power to the
AC outlet by plugging another item such as a lamp or fan.
Cannot listen to any station, or signal is too weak.
•Make sure the antenna is properly connected.
•Tune in the station properly.
•If a TV is near the unit, turn it off.
•Install the antenna again after relocating it to a better
reception position.
•An external antenna may be required.
Though the broadcast is stereo, it sounds monaural.
•Press the FM MODE button.
Remote control doesn't work.
•Press the POWER switch to turn the unit on.
•If the batteries are dead, change the batteries.
•Use remote control unit within the range (5m /15ft) and point
at the front panel.
•Clear obstacles between the remote control unit and the
main unit.
•If a strong light is near the unit, turn it off.
If normal operation cannot be recovered, unplug the power cord
from the outlet and plug it again.
3Select a preset channel using the numeric buttons.
Or press the TUNING/PRESET button repeatedly until the
desired preset station is found.
How to select preset stations
1Select the AM or the FM band by pressing the corresponding
button.
Memory Backup
Settings are stored permanently, even when power is turned off
and the unit is unplugged.
21 3 21 3
TUNER-1 TUNER-2
Preset Tuning 2
2Press the PRESET button.

11
Specifications
FM Tuner Section (Without notes 98.1 MHz, 65 dBf)
Tuning Range . . . . . . . . .87.5 MHz – 107.9 MHz (200 kHz steps)
Usable Sensitivity (IHF) . . . . . . . . . . . . . . . . . . . . . . . .Mono: 15 dBf
50 dB Quieting Sensitivity . . . . . .Mono: 21 dBf , Stereo: 41 dBf
Total Harmonic Distortion (1 kHz) . . Mono: 0.3%, Stereo: 0.4%
Frequency Response . . . . . . . . . . . . . . . . 30 Hz – 15 kHz, ±1.5 dB
StereoSeparation(1kHz)............................. 40dB
Signal-to-Noise Ratio . . . . . . . . . . . . Mono: 67 dB, Stereo: 63 dB
AM Tuner Section
Tuning Range . . . . . . . . . . . . 530 kHz – 1,710 kHz (10 kHz steps)
UsableSensitivity..................................64dB/m
Total Harmonic Distortion . . . . . . . . . . . . . . . . . . . 1% at 85 dB/m
Signal-to-Noise Ratio . . . . . . . . . . . . . . . . . . . . . . 40 dB at 85 dB/m
General
Power requirements. . . . . . . . . . . . . . . . . . . . . . . . .120 V AC, 60 Hz
PowerConsumption ..................................12W
Dimensions (W x H x D). . . . . . . . . . . . . . . . . . 435 x 95 x 270 mm
(17-1/8" x 3-3/4" x 10-5/8")
Weight(net) ..............................4kg(8-13/16lbs)
Standard Accessories. . . . . . . . . . . . . . . Remote Control Unit x 1
Battery (AAA, R03, UM-4) x 2
AM Loop Antenna x 1
FM adapter x 1
RCA Cord x 2
•Improvements may result in specifications and features
changing without notice.
•Illustrations may differ slightly from production models.
SpeakerCraft Inc. warrants to the original retail purchaser only that
this SpeakerCraft product will be free from defects in materials and
workmanship for a period of two years, provided the product was
purchased from a SpeakerCraft Authorized Dealer.
Defective products must be shipped, together with proof of pur-
chase, prepaid insured to the SpeakerCraft Authorized Dealer from
whom they were purchased, or to the SpeakerCraft factory at the
address listed on this installation instruction manual. Freight collect
shipments will be refused. It is preferable to ship this product in the
original shipping container to lessen the chance of transit damage.
In any case, the risk or loss or damage in transit is to be borne by
the purchaser. If upon examination at the Factory or SpeakerCraft
Authorized Dealer it is determined that the unit was defective in
materials or workmanship at any time during this warranty period,
SpeakerCraft or the SpeakerCraft Authorized Dealer will, at its
option, repair or replace this product at no additional charge, except
as set forth below. If this model is no longer available and can not
be repaired effectively, SpeakerCraft, at its sole option may replace
the unit with a current model of equal or greater value. In some
cases where a new model is substituted, a modification to the
mounting surface may be required. If mounting surface modifica-
tion is required, SpeakerCraft assumes no responsibility or liability
for such modification. All replaced parts and product become the
property of SpeakerCraft Inc. Products replaced or repaired under
this warranty will be returned to the original retail purchaser, within
a reasonable time, freight prepaid.
This warranty does not include service or parts to repair damage
caused by accident, disaster, misuse, abuse, negligence, inadequate
packing or shipping procedures, commercial use, voltage inputs in
excess of the rated maximum of the unit, or service, repair or modifi-
cation of the product which has not been authorized or approved by
SpeakerCraft. This warranty also excludes normal cosmetic deterio-
rationcausedby environmentalconditions.This warranty will bevoid
if the Serial number on the product has been removed, tampered
with or defaced.
This warranty is in lieu of all other expressed warranties. If the prod-
uct is defective in materials or workmanship as warranted above, the
purchaser’s sole remedy shall be repair or replacement as provided
above. In no event will SpeakerCraft be liable for any incidental or
consequential damages arising out of the use or inability to use the
product, even if SpeakerCraft Inc. a SpeakerCraft Inc. Authorized
Dealer has been advised of the possibility of such damages, or for
any claim by any other party. Some states do not allow the exclusion
or limitation of consequential damages, so the above limitation and
exclusion may not apply.
All implied warranties on the product are limited to the duration of
this expressed warranty. Some states do not allow limitation on the
length of an implied Warranty. If the original retail purchaser resides
in such a state, this limitation does not apply.
Warranty
Limited 2-Year Warranty

940 Columbia Avenue, Riverside, CA 92507
[phone] Int. [phone]
Fax [phone] www.speakercraft.com LIT90410
PURPOSE:
This document describes the RS-232 commands that will operate the STT 2.0 Twin Tuner
through the 9-pin RS-232 connector on the rear panel.
General Information:
Data Rate: 19,200 baud
Parity: None
Word length: 8 data bits, 1 stop bit
Handshake: No RTS/CTS handshaking
Connections: simple 3 wire (Rx, Tx, Gnd) interface
DATA ENTRY PROTOCOL:
Command Codes:
Character Range Example
X: ffOrewoP=0X,nOrewoP=1X1,0
T: 2renuT=2T,1renuT=1T2,1
B: MF=2dnaB,MA=1B2,1
P: detceleSteserPoN=)sutatsroftsuj(00P,03teserP=03P,1teserP=10P03-00
F: MF5.401=5401F,MA098=0980Fsrebmun4
A: pUkeeS=1A,nwoDkeeS=0A1,0
M: pets1pUpetS=1M,pets1nwoDpetS=0M1,0
S: dilavni=10S,oeretson,langison=)sutatsroftsuj(00S/kcoLlangiS
)oerets(kcollangis=11S,)onom(kcollangis=01SecneserPoeretS
Q: 2renuTfosutatS=2Q,1renuTfosutatS=1QsutatsyreuQ
2neht1,srenuthtobfosutatS=3Qrenutfo
N: teserP1pUpetS=1N,teserP1nwoDpetS=0N1,0
L: 1#teserPsanoitatSteS=10L03-10
Command Examples:
T1B2P01<cr
>
would command tuner #1 to select band 2 (FM) and tune to FM preset #1
T2B1F1070L03<cr
>
would command tuner #2 to set AM frequency 1070 kHz as AM preset #3
This command however, would not change the current station tuned on Tuner #2
To select a station to be tuned and THEN set that station as a preset, would require two commands:
T2B1F1070<cr
>
would command tuner #2 to select band 1 (AM) and tune to frequency 1070 kHz.
T2L03<cr> would command tuner 2 to set the currently tuned station (in this example AM 1070) as AM preset #3
Query Example:
Q1<cr> would solicit the following response:
Feedback as to the status of tuner #1, which would include band select, station preset, frequency
tuned, signal lock and stereo presence. The response string would look like this:T1B2P00F1011S11
T1 (tuner 1) B2 (FM), P00 (no preset selected), F1011 (frequency 101.1 MHz), S11 (signal lock & stereo)
Shortcut Commands:
Note: examples below are assuming Tuner 1 is in FM stereo mode and tuned to a station
Command
T1N1<cr>
T1L01<cr>
T1S10<cr>
T1M1<cr>
T1A0<cr>
T1B1<cr>
1 = locked, 0 = not
STT 2.0 DIGITAL AM/FM TWIN TUNER
Tuner 1 would go to AM mode and tune to the last previously tuned AM station
Tuner 1 would step up to the next higher preset number
Tuner 1 would set the currently tuned station as FM preset #1
Tuner 1 would switch the FM mode to mono
Tuner 1 would step up the frequency 0.2 MHz
Response/Action
Tuner 1 would go into "seek down" mode
RS-232 COMMANDS
Preset #
Frequency Setting
Seek Up / Down
Step Up / Down
Set Preset
The serial bus should follow a standard serial
communications protocol using Line oriented ASCII data
stream. The command line must be followed with a
carriage return for the unit to respond.The unit should
not echo characters received back to the host.
1 = stereo, 0 = mono
ask for tuner status
Preset Step Up / Down
Function
Power Off / On
Tuner #
Band #
External Unit
STT 2.0 RS-232 Port
RS-232 Commands