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Construction

 

 

Production of the PCB is a greater challenge. The drawing of the panel is much more complex and denser than 
the previous ones. It was successful to produce this PCB using the so called “blue-foil” technology. Other 
photo-resistive sprays like Positiv-20 can also be used. Check the PCB thoroughly before placing components 
because it would not be possible to repair foil under integrated circuits. Shift registers are placed onto the foil 
side while LED displays are to be inserted onto the component side. 
 

 

 

Final adjustments 
  

Final adjustments are similar in case of both versions. First step is to adjust the two variable resistors named 
„OUT VOLTAGE ADJUST” on the back side of the rotator to produce maximum voltage on the connector. 
Start with the adjustment of the shift. Connect the interface to the original controller of the rotator. The drawing 

Содержание G-5400

Страница 1: ...ot utilized i e later printer models are made for USB ports The base of both versions is a PIC16F870 microprocessor which includes a ten bit A D converter and a serial port driver too Interface for the parallel port Operation This interface uses the protocol of the FODTRACK pro gram This driver can be freely downloaded from the Inter net Latest software like WXTRACK is able to handle an interface ...

Страница 2: ...on and start with final adjustments Interface for serial ports Operation In case we are intended to use a serial port instead of a parallel port we have to adjust voltage levels prop erly For this task a well known circuit MAX232 can be used Since the change to a serial port we can save some connections on the microprocessor In this case we can decide ourselves whether to utilize FLIP func tion PO...

Страница 3: ...ot work properly In this case we have to use tantalum capacitors or depending on the production technology smaller capacitor values can be chosen which may be as low as 100 nF for a CMOS product In case of appropriate operation on pin 2 of MAX232 9 4 V while on pin 6 9 4 V must be measured If the voltages are equal to these values adjust the variable resistors into middle position Display Operatio...

Страница 4: ...ents because it would not be possible to repair foil under integrated circuits Shift registers are placed onto the foil side while LED displays are to be inserted onto the component side Final adjustments Final adjustments are similar in case of both versions First step is to adjust the two variable resistors named OUT VOLTAGE ADJUST on the back side of the rotator to produce maximum voltage on th...

Страница 5: ... direction as in default position Now adjust 180 degrees azimuth by P2 again Then we will have finished horizontal adjustments In the vertical plane the procedure is the same but the display must show 0 in default position and 180 in the end position P1 We will than have basic adjustments finished If the antenna does not point to the direction shown on the display we can correct shifts by variable...

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