Magnum Dynalab MD 205
Signal Sleuth FM SIGNAL PROCESSOR
INSTRUCTION MANUAL
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TABLE OF CONTENTS
HOW THE MD 205 SIGNAL SLEUTH WORKS 3
SET UP AND OPERATION 4
IMPORTANT INSTRUCTIONS 5
PRODUCT SPECIFICATIONS 6
SAFETY SHEET 7
LIMITED WARRANTY 8
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HOW THE MD 205 SIGNAL SLEUTH WORKS
The Sleuth is a tunable RF processor for the 88-108 MHz frequency band. It is
capable of applying amplification or attenuation (+ 30dB to –30dB) within this
frequency range. To accomplish its task, the Sleuth adds three RF stages to your
existing tuner’s front end. This circuitry is designed and tuned to optimize the
performance of any FM tuner.
The Sleuth has a 600 KHz skirt to help improve the adjacent channel specification
of your tuner.
Tuning is accomplished using solid state components (varactors) which are
controlled by a long-life low noise potentiometer. The signal is passed through the
Sleuth’s circuitry when the unit is powered up and the ‘Antenna Switch’ is in the
amplify position. When the switch is in the ‘bypass’ position, no amplification is
taking place and the signal is fed directly into your tuner.
The performance of the Sleuth is directly influenced by the type and capability of
the antenna. The better the antenna, the better the sleuth will perform. Please
see the section on
Reception Techniques
for more information.
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SET UP AND OPERATION
DO NOT DISCARD THE PACKAGING. Should it be necessary to return the unit,
and it is not packaged in its original packaging, you will be responsible for any
damages that might occur during shipping. You may also be charged for the new
packaging required to ship the unit back to you.
1. Familiarize yourself with the unit’s rear panel, noting the connector marked
“
Antenna Input
2. Connect one end of the supplied patch cord (3 ft. long piece with ‘F’
connectors on each end) to the connector marked “
the other end to the ‘F’ connection on your tuner.
3. Connect your antenna lead to the connector marked “
rear of the MD 205.
4. Make sure both switches on the front of the unit are in the off position
in the off position and
cord into an outlet that matches the voltage marked on the back of the unit.
Significant damage will be done to the unit if the wrong voltage is applied.
5. Turn the unit on by moving the
LED should light up. Move the
the LED should light up. Return both switches to the ‘OFF’ position.
The following procedure should be carried out with the tuner’s
The Sleuth’s
point where a ‘click’ is heard. This places the Sleuth at a factory set gain position of ‘-30
dB’.
6. Turn the Sleuth ‘ON’. Turn your FM tuner ‘ON’ making sure the FM stereo is
switched on. Select a station known to be moderately strong, set the Sleuth’s
tuning control so its cursor is at approximately the same frequency. Place the
Sleuth’s
heard although it may be somewhat weaker.
7. Rotate the
turn the control clockwise.
8. Observe the signal strength on the tuner. Rotate the Sleuth’s
slightly to the left and right, watch for the highest reading on the signal
strength meter or the clearest audio.
RF Gain
Antenna Signal
” and which is “
Output to Tuner
”.
Output to Tuner
Antenna Input
Antenna Signal
power
antenna signal
control should be at the full counter-clockwise position, beyond the
switch in the ‘Amplify’ position. This station should be
RF Gain
control fully clockwise, you will feel a click as you begin to
in the Bypass position. Plug the AC line
switch to the ‘ON’ position. The left most
switch to the ‘Amplify’ position,
Mute
switched to ‘OFF’.
Tune
control
”, connect
” on the
; Power
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9. Rotate the
get weaker or a noticeable change in the audio is heard, rotate the control
clockwise until the optimum situation returns.
10. You may now turn the
11. To work with other frequencies, turn the A
the ‘bypass’ position, tune your tuner to the new frequency, turn the
knob on the Sleuth to the same frequency, turn the
Rotate the
signal strength or audio. Repeat this procedure for other frequencies.
12. A situation may occur where there is too much signal coming into the
tuner, in this situation you would want to turn the
counter clockwise past the ‘0’ dB setting to attenuate the signal strength.
IMPORTANT INSTRUCTIONS
1. The Sleuth’s POWER switch must be on at all times when you are using
2. The Sleuth’s T
RF Gain
control counterclockwise until you see the signal strength
Mute
switch to the ‘ON’ position.
ntenna
switch on the Sleuth to
Tuning
Antenna
Gain
control and the
your FM tuner and the Sleuth is installed in your FM tuner’s line. If it is
not turned on, the signal will not reach your tuner.
uning
ANTENNA SIGNAL switch is in the ‘AMPLIFY’ position.
and
Tuning Knob
RF Gain
circuitry is enabled only when the
on the Sleuth to optimize the
Gain
control on the Sleuth
switch to amplify.
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PRODUCT SPECIFICATIONS
CIRCUIT: 3 varactor-tuned RF stages
GAIN: VARIABLE –30 dB thru + 30 dB
TUNING RANGE: 88-110 MHz
BANDWIDTH: Better than 400 KHz
NOISE: Less than 4 dB
DISTORTION: 0 %
ANTENNA INPUT: 75 ohms
POWER REQUIRED: 230/240/110 volts
SIZE: 17” x 1.75” x 6”
43.18cm x 4.45cm x 15.24cm
WEIGHT: 6 LBS/ 2.65 KG
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SAFETY SHEET
IMPORTANT SAFETY INSTRUCTIONS
1. KEEP THESE INSTRUCTIONS
2. HEED ALL WARNINGS
3. FOLLOW ALL INSTRUCTIONS
4. DO NOT USE THIS APPARATUS IN WATER
5. CLEAN ONLY WITH DRY CLOTH
6. DO NOT BLOCK ANY VENTILATION OPENINGS, INSTALL IN ACCORDANCE
WITH THE MANUFACTURER’S INSTRUCTIONS.
7. DO NOT INSTALL NEAR ANY HEAT SOURCES SUCH AS RADIATORS, HEAT
REGISTERS, STOVES, OR OTHER APPARATUS (INCLUDING AMPLIFIERS)
THAT PRODUCE HEAT.
8. DO NOT DEFEAT THE SAFETY PURPOSE OF THE GROUNDING TYPE PLUG.
THE GROUNDING PLUG HAS TWO BLADES AND A THIRD GROUNDING
PRONG. THE THIRD PRONG IS PROVIDED FOR YOUR SAFETY. IF THE
PROVIDED PLUG DOES NOT FIT INTO YOUR OUTLET, CONSULT AN
ELECTRICIAN FOR REPLACEMENT OF THE OBSOLETE OUTLET.
9. PROTECT THE POWER CORD FROM BEING WALKED ON OR PINCHED
PARTICULARLY AT PLUGS, CONVENIENCE RECEPTACLES, AND THE POINT
WHERE THEY EXIT FROM THE APPARATUS.
10. ONLY USE ATTACHMENTS/ACCESSORIES SPECIFIED BY THE
MANUFACTURER.
11. UNPLUG THIS APPARATUS DURING LIGHTNING STORMS OR WHEN
UNUSED FOR LONG PERIODS OF TIME.
12. REFER ALL SERVICING TO QUALIFIED PERSONNEL. SERVICING IS
REQUIRED WHEN THE APPARATUS HAS BEEN DAMAGED IN ANY WAY,
SUCH AS THE 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.
13. THE EQUIPMENT REQUIRES A GROUNDED POWER OUTLET TO
OPERATE SAFELY.
14. THE POWER SUPPLY CORD IS THE MAIN DISCONNECT AND SHALL
BE READILY OPERABLE.
“WARNING” TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO
NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.
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LIMITED WARRANTY
Register your product at www.magnumdynalab.com
Magnum Dynalab Ltd. herein referred to as the “manufacturer” guarantees
this product to be free of defect in both material and workmanship and agrees to
remedy any such defect or replace any defective component at no charge for a
period of two years from date of sale to the first end user. This warranty is void if
the product has been found to be subjected to misuse, abuse, lightning strike,
unauthorized service, damaged in transit or has been altered or repaired in such
a way as to detract from its performance, reliability or its safe operation. All
tubes are covered for 12 months.
Should such defect be discovered and it falls within the terms of this
guarantee, the manufacturer will correct the defect in workmanship and/or
replace any defective component with a new one of similar capability and value.
This warranty does not apply to the cabinet or appearance items such as the
faceplate, control knobs or meter lenses nor does it cover any expenses in
shipping the unit to the appropriate service depot.
The foregoing is in lieu of any other warranties expressed, implied or
statutory and the manufacturer neither assumes nor authorizes any person to
assume for it any other obligation or liability in the connection with the sale of this
product. This warranty is not transferable except by written authorization from
the manufacturer.
In order to qualify under the terms of the above warranty, all items must be
returned to the appropriate factory service depot with all shipping charges
prepaid in lieu of having previously registered the purchase of the unit by
completing and returning the attached Registration Card, the unit must be
accompanied by proof from an authorized Magnum Dynalab Ltd. dealer.
YOUR LOCATION RETURN SHIPPING ADDRESS
Within the USA Magnum Dynalab c/o Trans American
2775 Broadway, Buffalo, NY, USA
14227-1043
PHONE: 1-800-551-4130
Within Canada Magnum Dynalab Ltd.
8 Strathearn Avenue, Unit # 9
Brampton, ON, Canada
L6T 4L9
PHONE: 1-800-551-4130
Other Countries Contact selling dealer
TO PREVENT FIRE SHOCK OR HAZARD, DO NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE. TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT
REMOVE COVER OR FACEPLATE, NO USER SERVICEABLE PARTS INSIDE. REFER
SERVICING TO QUALIFIED SERVICE PERSONNEL.
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