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RECEPTION TECHNIQUES 

 

Antenna Cabling: 

 
The lead-in cable from the antenna is often the weakest link in the system. Some 
time spent on selection and matching will yield dramatic results when it comes to 
noise reduction in weak signals. 
 
A good grade of 75 ohm coaxial cable will provide very sufficient signal passage, 
along with effective shielding against interference. Without effective shielding your 
coaxial cable can in fact become an antenna in itself. There are different grades 
of 75 ohm cable, there is RG59/U (Suitable for 50 feet and less) and RG 6. RG 
6 is the better of the two and should be used in runs of 100 feet or more. The 
RG 6 has quad shielding and 50 % less losses than RG 59/U.  
 
A good type of RG 6 is Beldon 1189 A. Combine this cable with LRC connectors 
and you will have an installation that will optimize the performance of your tuner.  
 
The key to maximizing the efficiency of the system is insuring that all connections 
are clean and tight, silicon grease on outdoor connections will insure good 
performance over a long period of time. If you splice either cable, make sure that 
exactly the same type of cable is used.  
 

Types of Antennas: 

 

 

Multi-element Yagi 

- This is a unidirectional antenna capable of pulling in very 

distant stations due to its high gain, the higher the gain the better. These types of 
antennas are very directional and should be used with a rotor to get the 
maximum benefit of the antenna. The directional feature helps eliminate multi-path 
problems by allowing only the signal from the direction that the antenna is facing 
to be picked up by the antenna and not the signals that come from a different 
direction.  

Magnum Dynalab offers two Yagi antennae, the MD 6 FM or MD 10 FM 

 

Vertical ½ Wave  

- This design offers ease of installation and operation. This type 

of antenna is omni-directional, which means that it picks up stations coming from 
all directions. No rotor is required to pull in stations from behind or the side. This 
design also gathers more of the FM signal from the air, offering superior fidelity 
over that of a standard bi-directional antenna.  It also gives 2.5 dB gain to the 
signal strength over that of a standard dipole.  
 

If multi-path is a reception problem try laying the antenna down in the 

horizontal plane rather than the vertical plane. This type of antenna can be used 
indoors or outdoors, but regardless of whether it is installed indoors or outdoors 
the higher that you can put it the better it will perform.   

 

Содержание MD 90

Страница 1: ...Magnum Dynalab MD 90 90R ANALOG FM TUNER INSTRUCTION MANUAL...

Страница 2: ...FUNCTIONALITY 6 DISPLAYS AND METERS 6 IMAGE OF MD 90 7 CHECKING OUT YOUR MD 90 8 TUNER REMOTE OPTIONAL 9 IMAGE OF RC1 REMOTE 10 TROUBLESHOOTING 11 RECEPTION TECHNIQUES 12 Antenna Cabling 12 Types of...

Страница 3: ...of your FM reception with the highest degree of consistency available in the industry To insure that all specifications on our tuners are met at ALL frequencies we manually align our tuners front end...

Страница 4: ...E SHIPPER UNTIL YOU HAVE BEEN ASKED TO DO SO DO NOT DISCARD THE PACKING MATERIALS AND CARTONS Should there be a necessity to return the unit for any reason it must arrive safely and suitably packaged...

Страница 5: ...ohm to 75 ohm balun transformer 4 Make sure that the center conductor of the cable is properly inserted into the connector If you do not possess an antenna attach the temporary wire enclosed in box t...

Страница 6: ...eard while looking for programs We recommend that with the optional remote system you leave the Mute switch in the ON position E TUNING KNOB Rotating this knob allows you precise control of the fine t...

Страница 7: ...ter This meter is calibrated to never hit 10 this is done to protect the meter mechanism I FREQUENCY DISPLAY Displays the station via a numeric value the frequency that your tuner is dialed into Displ...

Страница 8: ...face of your tuner should be on Place the stereo mono switch B on diagram to the Mono position your stereo light should now go off Now turn the stereo mono switch back to the Stereo position and your...

Страница 9: ...il your center tune meter is set or your magic eye tube is closed 4 Your Precision remote gives you the ability to store and scan up to 20 preset stations To program a preset station first tune to the...

Страница 10: ...10 IMAGE OF RC1 REMOTE...

Страница 11: ...plifier is off Verify installation of interconnects Turn preamp to input where tuner is connected On preamp defeat tape monitor function Turn amplifier on Low signal strength Antenna not connected pro...

Страница 12: ...used Types of Antennas Multi element Yagi This is a unidirectional antenna capable of pulling in very distant stations due to its high gain the higher the gain the better These types of antennas are...

Страница 13: ...good folded di pole There are many styles of antennas but all of them are based on one of these types FM RECEPTION AIDS AND ACCESSORIES We have already alluded to the importance of a good quality ante...

Страница 14: ...HD Mono 0 10 THD Stereo 0 18 Stereo separation 50 0 dB AM suppression 70 0 dB SCA rejection 80 0 dB IF rejection 80 0 dB 19 KHz and 38 KHz component rejection 75 0 dB Audio frequency response 1 dB 20...

Страница 15: ...TE 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 SP...

Страница 16: ...propriate 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 obliga...

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