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NF6X

Member Since: May 21, 2011

Country: United States

Profile

Bio

I never cared much for bio.

Role

Electrical Engineer

Organizations

You probably haven’t heard of them.

Spoken Languages

English

Programming Languages

Yes

Associations

Some

Universities

A few

Expertise

I’d like to think so.

Interests

Yes

Websites

http://www.nf6x.net

Publications

Not really

  • Product WRL-10573 | about 3 years ago

    This is a nice piece of hardware! I wish it had a plastic enclosure, though.

  • Product BOB-09169 | about 3 years ago

    The AD9835 Breakout Board (just like Analog Devices' own evaluation board for this chip) doesn’t have any filtering on its output. This lets you study the chip’s output spectrum, and try out filter designs that are optimized for some specific application. It’s common to use a low-pass filter with a corner frequency of about 30-40% of the DDS clock frequency, but sometimes you’ll do tricky stuff like deliberately filtering out the main output frequency and using one of the image frequencies.
    Here are a couple of scope shots that I made. The first shows the unfiltered output of the board programmed for 10 MHz, and the second shows it with a 15 MHz low-pass filter (Mini-Circuits model SLP-15+). The yellow trace is the output signal, and the red trace is an FFT of the output signal.
    tek00000.png - unfiltered
    tek00001.png - 15 MHz LPF

  • Product BOB-09169 | about 3 years ago

    I just got my AD9835 Breakout Board this weekend. I posted a sample sketch in the forum that might be helpful:
    http://forum.sparkfun.com/viewtopic.php?f=14&t=20097

No public wish lists :(