Learn-As-You-Build" Kit Assembly - Ramsey Electronics UAM4 Manual

activated. This may be accomplished by a simple switch contact or an
external logic level device.
The last set of jumpers, 'SWITCHING FREQUENCY', H1 and H2, set up the
frequency and modulation mode of the MAX9708. As described above, a
class D amplifier uses pulse width modulation to switch the output transistors
on and off. These jumpers determine the frequency as well as the mode,
either Fixed-Frequency Modulation or Spread-Spectrum Modulation. The
frequency range is between 160kHz and 250kHz. Typically the factory default
mode of Spread-Spectrum Modulation is recommended but we have made the
other modes available for you to experiment with.
Additional information about configuring the UAM4 and its jumper settings is
available in the "DETAILED INPUT/OUTPUT INFORMATION" section of this
manual.
The remainder of the components are simply support components required by
the MAX9708 and are mostly used to provide stable voltages and signals
generated within the MAX9708. Again, if you want more in depth information
about the MAX9708 go to "www.maxim-ic.com" and locate the data sheet.
RAMSEY Learn-As-You-Build KIT ASSEMBLY
There aren't that many solder connections on the UAM4 printed circuit board,
but you should still practice good soldering techniques.
•
Use a 25-watt soldering pencil with a clean, sharp tip.
•
Use only rosin-core solder intended for electronics use.
•
Use bright lighting; a magnifying lamp or bench-style magnifier may
be helpful.
•
Do your work in stages, taking breaks to check your work. Carefully
•
brush away wire cuttings so they don't lodge between solder
connections.
We have a two-fold "strategy" for the order of the following kit assembly steps.
First, we install parts in physical relationship to each other, so there's minimal
chance of inserting wires into wrong holes. Second, whenever possible, we
install in an order that fits our "Learn-As-You Build" Kit building philosophy.
This entails describing the circuit that you are building instead of just blindly
installing components. We hope that this will not only make assembly of our
kits easier, but help you to understand the circuit you're constructing.
UAM4• 8