HOW TO, MONTREAL DOPPLER3V2, June 06 ******* ASSEMBLY ******** 1- Install the 2 PCBs back to back, use #4 screws and nuts to hold them seperated and mounted to the case. 2- install the LCD display using #2 screws and nuts, make shure that no traces on the LCD PCB are short circuit with the mounting screws, you may need a fiber washer to insulate them. 3- Solder the LEDs on the display PCB with their flange at the height of the top of the PIC16F628A IC. 4- If you are using R72 to R79 in the antennas switching circuits, install the FB on the leads going to the antennas. If no resistors are needed, pass 2 turn of #26 enamel wire in the FB. 5- If you are not using the S-Meter option, do not install the #50 componants. Ground the center of P50. 6- If you are not using a PC and or GPS, do not install the #100 group of componants. 7- The GPS input can be on pin 2 for a null-modem RS-232 cable, or 3 for a staight RS-232 cable. ****** USING THE DOPPLER3V2 ******* 1- Remove header "H1" to display only the APRS TX menu. Install the header "H1" to display the 2 operation menus. 2- P20 should be adjusted near ground for proper contrast on the LCD. 3- For 4 antennas and an antenna switcher that needs +5V to turn on an antenna, connect the switcher control leads to the ANT1 to ANT4 terminals. __ +5V ant on | | __| |____________ 0V ant off 4- For 4 antennas and a switcher that needs a ground to turn on an antenna, connect to the ANT5 to ANT8 terminals. __ ____________+5V ant off | | |__| 0V ant on 5- For 4 antennas and a differential switcher, connect antenna 1 to the ANT1 and ANT5 terminals while respecting the correct polarity for your switcher type. Antenna 2 to ANT2 and ANT6 terminals, antenna 3 to ANT3 and ANT7 terminals and antenna 4 to ANT4 and ANT8 terminals. ANT1 to ANT4 terminals supply a +5 to the antenna that is ON, ANT5 to ANT8 terminals supply a groung to the antenna that is ON. 6- For 8 antennas, connect to the ANT1 to ANT8 terminals, use the antennas menu to select +or ground switching. 7- If you are using the S-Meter option, adjust P50 for full scale on the bargraph with the maximum signal strength out of the radio. 8- Using a good DF signal, adjust the radio volume control for near Full Scale on the bargraph. There is no need to re_adjust it any more. 9- Increase the integration to your taste, push the DO button to instantly reduce the integration to 5 rotation of the antenna, push again to return to your selected integration. 10- Calibrate to foward with a friend driving in front of you on a straight road and transmitting, push the DO button on the CAL to FOWARD menu, the direction will then be calibrated to the front of your car. Jacques VE2EMM