background image

IGNITION NOISE INTERFERENCE 

Use of a mobile receiver at low signal levels is normally limited by the presence of 

electrical noise. The primary source of noise in automobile installation is from the 
generator and ignition system in the vehicle. Under most operating conditions, when 
signal level is adequate, the background noise does not present a serious problem. Also, 
when extremely low level signals are being received, the transceiver may be operated 
with vehicles engine turned off. The unit requires very little current and therefore will 
not significantly discharge the vehicle battery. 

 
Even though the transceiver has ANL and NB controls, in some installation ignition 

interference may be high enough to make good communications impossible. The 
electrical noise may come from several sources. Many possibilities exist, as variations 
between vehicles require different solutions to reduce the noise. 
 

ANTENNA 

A vertically polarized, quarter-wavelength whip antenna provides the most reliable 

operation and greatest range. Shorter, loaded-type whip antennas are more attractive, 
compact and adequate for applications where the maximum possible distance is not 
required. Also, loaded whips do not present the problems of high wind resistant 
imposed by a full quarter-wavelength whip.  

 
Mobile whip antennas utilize the metal body of the vehicle as a ground plane. When 

mounted at a corner of the vehicle they are slightly directional, in the direction of the 
body of the vehicle. For all practical purpose, however, the radiation pattern is non-
directional. The slight directional characteristic will be observed only at extreme 
distances. A standard antenna connector (type SO-239) is provided on the transceiver 
for easy connection to a standard PL-259 cable termination. 

 

If the transceiver is not mounted on a metal surface, it is necessary to run a separate 

ground wire from the unit to good metal electrical ground in the vehicle. When installed 
in a boat, the transceiver will not operate at maximum efficiency without a ground plate, 
unless the vessel has a steel hull. 

 

Before installing the transceiver in a boat, consult your dealer for information 

regarding an adequate grounding system and prevention of electrolysis between fittings 
in the hull and water.    

Содержание SuperStar

Страница 1: ...er 6 CHAPTER 3 Operation 7 Front Panel 7 Rear Panel 10 Procedure to Receive And Transmit 11 Receiving SSB Signals 12 Alternate Microphone And Installation 14 OWNER S MANUAL SUPERSTAR AM FM USB LSB CW AMATEUR MOBILE TRANSCEIVER WITH BUILT IN FREQUENCY COUNTER TABLE OF CONTENTS Conformity certificate 17 et SUPERSTAR are registered and protected brands Downloaded from www cbradio nl ...

Страница 2: ...SMITTER RF Power Output AM FM CW 10watts SSB 25watts PEP Carrier Emission 50 dB Spurious Emission 50 dB Audio Distortion 10 Frequency Response 300 to 2500 Hz Microphone Dynamic RECEIVER Sensitivity for 10 dB S N N CW AM 1 0 ȝV SSB 0 25 ȝV Sensitivity for 20 dB S N N FM 0 5 ȝV Squelch Sensitivity 0 5 ȝV Image Rejection More than 65 dB AGC Figure of Merit 100 mV for 10dB Change in Audio Output Audio...

Страница 3: ...orter loaded type whip antennas are more attractive compact and adequate for applications where the maximum possible distance is not required Also loaded whips do not present the problems of high wind resistant imposed by a full quarter wavelength whip Mobile whip antennas utilize the metal body of the vehicle as a ground plane When mounted at a corner of the vehicle they are slightly directional ...

Страница 4: ...e external speaker is plugged in the internal speaker is disconnected FRONT PANEL 1 ON OFF VOLUME CONTROL This knob controls the volume and power to the radio To turn radio on rotate the knob clockwise Turning the knob further will increase the volume of the receiver 2 SQUELCH CONTROL This switch is used to eliminate background noise being heard through the receiver which can be disturbing when no...

Страница 5: ...OUNTER This frequency counter indicates the selected channel frequency digitally 15 TALKBACK SWITCH This switch is used to monitor the sound feedback effects 16 HI LOW SWITCH This switch select HI or LOW band of operation 17 NB ANL OFF SWITCH When the switch is place in the NB ANL position the RF Noise Blanker NB and the Automatic Noise Limiter ANL in the audio circuits are activated The Noise Bla...

Страница 6: ...ver comes complete with a low impedance dynamic microphone B PROCEDURE TO RECEIVE 1 Be sure that power source microphone and antenna are connected to the proper connectors before going to the next step 2 Turn VOL knob clockwise to apply power to the radio 3 Set the VOL for a comfortable listening level 4 Set the MODE switch to the desired mode 5 Listen to the background noise from the speaker Turn...

Страница 7: ...cy is increased whereas in the LSB mode the transmitter s output frequency is decreased The result in listening to the receiver is that when the MODE switch is in the proper position either USB or LSB a true reproduction of a single tone of modulation will result and if the tone is increased in frequency such as a low pitched whistle or a high pitched whistle you will hear the increase in the outp...

Страница 8: ...Pin Number Mic Cable Lead 1 Audio Shield 2 Audio Lead 3 Transmit Control 4 Receive Control Fig 1 Your transceiver microphone schematic If the microphone to be used is provided with precut leads they must be revised as follows 1 Cut leads so that they extend 7 16 beyond the plastic insulating jacket of the microphone cable 2 All leads should be cut to the same length Strip the ends of each wire 1 8...

Страница 9: ...ct to the threaded hole in the pin receptacle body When the housing is completely threaded into the pin receptacle body a final fraction of a turn either clockwise or counterclockwise may be required to align the screw hole with the threaded hole in the pin receptacle body When these are aligned the retaining screw is then screwed into place to secure the housing to the pin receptacle body 9 The t...

Страница 10: ...Notes Notes ...

Страница 11: ...50 SEURRE FRANCE POUR LA VALIDITE DE VOTRE GARANTIE Nom Prénom Adresse Tél Date d achat Type Série N APPAREIL GARANTI 1 AN PIECES ET MAIN D ŒUVRE Cachet du Distributeur Cachet du Distributeur Bon de Garantie à découper et à retourner sous enveloppe dans un délai maximum de 15 jours après la date d achat à l adresse suivante Bon de Garantie à conserver Sans le Cachet du Distributeur la garantie ser...

Отзывы: