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8 Resources

Please see the kit page

http://www.hanssummers.com/qrssultimate2

for any information on latest updates

and issues.

Further references are listed in the Operation manual.

Analog Devices DDS information:

http://www.analog.com/en/rfif-components/direct-digital-synthesis-

dds/products/index.html

9. Version History

15-Oct-2013

•

Initial draft version

11-Nov-2013

•

First official version

01-Feb-2014

•

PCB revision 2

06-Mar-2014

•

PCB revision 3

06-Jun-2014

•

Include PCB revision 4 (minor change to expose pads at the corner mounting holes)

Содержание Ultimate3

Страница 1: ...anual is to be read in conjunction with the operation manual The kit supports the following modes QRSS mode plain on off keyed slow CW FSK CW mode frequency shift keyed slow CW DFCW mode dual frequenc...

Страница 2: ...er wall wart or even four 1 5V batteries connected in series with a suitable low dropout regulator Do not use more than 6V this may kill the microcontroller the LCD may not work properly with more tha...

Страница 3: ...space is provided for a 220K resistor for smoother contrast adjustment 3 2 Capacitors C2 3 22pF ceramic marking 22 or 220 C1 4 5 6 10nF ceramic marking 103 C7 No capacitor space is provided for future...

Страница 4: ...no solder bridges have been inadvertently created Note that components R2 and C7 are not required or supplied in the kit R2 may be added by the builder if lower LCD backlight brightness is desired Q3...

Страница 5: ...s well on a front panel see later hardware options section 4 Wind and install the toroid The toroid can be mounted horizontally or vertically I prefer the horizontal method as there is enough space fo...

Страница 6: ...is so that later if they need to be removed for different hardware options configuration a convenient alternative is to just cut them using wire cutters PCB Rev 3 4 please follow diagram below not pho...

Страница 7: ...less sensitive to adjust If you do not fit a 200K resistor for R4 then you must fit a wire jumper here as shown 8 Solder in transistors Q1 and Q2 If you have purchased additional transistors for Q3 a...

Страница 8: ...tant Upon power up you will need to adjust the contrast potentiometer R1 to view the LCD properly Turn it fully clockwise to start with before applying power Then turn it gradually anti clockwise unti...

Страница 9: ...V supply be sure to connect a wire between the 5V and PA pins as shown by the short red vertical line in the diagram right 5 3 Alternative button mounting option If you wish you may use an external pa...

Страница 10: ...er supply voltage for the Power Amplifier PA The microcontroller must still be run at a voltage not exceeding its 5 5V rating 5V is recommended To facilitate running the PA at higher voltages to provi...

Страница 11: ...the DDS module s comparator and is a 5V squarewave The sinewave connection is the analogue frequency output of the DDS module and has a 1V p p amplitude In both cases you should refer to the AD9850 d...

Страница 12: ...accurately calibrated frequency counter or an accurately calibrated receiver If you are going to use a GPS receiver module to provide a 1pps signal to the kit no calibration is required the kit will...

Страница 13: ...term while the different components are experiencing slightly different temperatures the frequency can shift considerably I believe that even small air currents over the oscillator case are enough to...

Страница 14: ...manual Analog Devices DDS information http www analog com en rfif components direct digital synthesis dds products index html 9 Version History 0 15 Oct 2013 Initial draft version 1 11 Nov 2013 First...

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