| HF-DDS
KIT DESCRIPTION
Please
Note: that all information including pictures on this web page
are copyright to Mini-Kits & must not be used on any other
web site.
The
HF-DDS documentation below is
for those that are wanting to know if this Kit is suitable for
their own application. The Kit comes complete with detailed circuit
& construction information, including schematic & board
overlay diagrams.
The
PIC Source code will not be available for those that may want
to change things in the Software, but we may be able to get some
updates to the Software if we have enough requests. A Bootloader
is programmed into the PIC18F4520 so that firmware updates can
easily be done if required. The Bootloader is also used to protect
the Software copyright due to Mini-Kits large investment in this
project.
- EME165 KIT AD9954 DDS KIT ( Link To Kit description )
- EME150 KIT PIC Controller KIT ( Link To Kit description )
HF-DDS
DOCUMENTATION
HF-DDS
BLOCK DIAGRAM 
24/1/12
HF-DDS
Notes Ver8 ( Instructions on How to use
the HF DDS ) Download
HF-DDS
SOFTWARE
How
To Update The Software Download
AN851
Microchip Quick Programmer Software Download
Latest
Firmware Update UPDATE_HF_DDS_VER_X_X.hex Download
There
are currently no software updates after v1.J2 4/12/2009
PLease
note: that if you try & update the software using a PIC programmer
then you will erase the bootloader software that is pre-programmed
into the PIC. The bootloaded is used to protect Mini-Kits from
software piracy, & if you accidentaly do this then you will
have to return your EME150 Microcontroller board to Mini-Kits
to be reprogrammed.
HF
DDS KIT CONSTRUCTORS ALERT
There
are no alerts at this time. For any problems with your kit, please
refer to the kit faults & modification section below.
CONSTRUCTION
IMAGES OF AD 9954 HF DDS PROTOTYPE KIT
The
above image shows the Prototype HF-DDS Kit. Please note that Kits may be supplied with a different LCD display module. Please refer to the HF-DDS Kit page when ordering for the description of what it includes.
KIT
CHANGES MODIFICATIONS & FAULTS
1/
A problem occured when the HF-DDS software when first powered
up could not recognise the AD9954 chip. The fault was traced to
a faulty TXB0108PWR level converter chip on the EME165 DDS board.
2/ No or low RF output from the AD9854 can be due to poor soldering of the chip to the board. Sometimes pressing down on the chip can increase the RF output indicating a poor solder joint on one of the pins.
3/ When turning the Rotary Encoder it either does not tune, or only tunes in one direction. Check that the diodes are correctly fitted on the EME159 control board.
4/ LCD display has no characters, or only shows square blocks on the display top half. Please check that you have the wiring correct from the EME159 board to the LCD module. Many have incorrectly wired the LCD modules & damaged them.
- EME150 KIT PIC Controller KIT ( Link To Kit Webpage )
- EME165 KIT AD9954 DDS KIT ( Link To Kit Webpage )
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