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Author Topic: Finally! A Use For That Function Generator Triangle Output  (Read 2693 times)
TANAKASAN
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Posts: 933




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« on: November 04, 2013, 11:55:05 PM »

Some of us have a function generator in our pile of test gear, maybe 1Hz to 100 KHz with square, triangle, sawtooth and sine outputs. Over the years I've found uses for most of the wave shapes, square for logic, sine for audio test and once in a while a sawtooth to sweep something. What the (%&$ can we use a triangle wave for?

Well, I've just found out.

Set up a rig to produce FM and display the output on a spectrum analyzer. Feed a triangle wave audio signal into the modulation input and you'll see a beautiful block shape on the screen with a flat top making it dead easy to setup the deviation.

Tanakasan
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K8AXW
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Posts: 3636




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« Reply #1 on: November 05, 2013, 09:56:19 AM »

Tanakasan:  VERY interesting!  I'm going to check that out.  Wonder how a scope would work instead of a spectrum analyzer?? 
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K0BT
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Posts: 176




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« Reply #2 on: November 07, 2013, 09:21:21 AM »

Thanks for the idea.  I'm going to pull the rig from my truck just to try it.
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KE7TPA
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Posts: 7




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« Reply #3 on: December 23, 2013, 11:14:30 AM »

I'm at a local hamfest a few years back and this fellow has a nice Drake R-4B sitting on his table. I carefully look it over (without touching) and determine it is a worthy piece cosmetically. As I inquire about a little history from the seller, he grabs the radio, spins it upside down and places it on the table upside down. In doing so, he drug the top of the cabinet across a staple imbedded in the table, scratching the hell out of an otherwise pristine piece. From what I experienced with this chap, and what I see regularly on all ebay, etc., people generally don't seem to know how to handle objects to maintain them in a pristine state. Finding vintage pieces in "fine" or "mint" condition is exceptionally rare. Some people can buy a new car and have it looking like it's ten years old within six months of leaving the showroom.
73 KE7TPA
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VU2NAN
Member

Posts: 237




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« Reply #4 on: December 26, 2013, 05:33:43 AM »

I'm at a local hamfest a few years back and this fellow has a nice Drake R-4B sitting on his table. I carefully look it over (without touching) and determine it is a worthy piece cosmetically. As I inquire about a little history from the seller, he grabs the radio, spins it upside down and places it on the table upside down. In doing so, he drug the top of the cabinet across a staple imbedded in the table, scratching the hell out of an otherwise pristine piece. From what I experienced with this chap, and what I see regularly on all ebay, etc., people generally don't seem to know how to handle objects to maintain them in a pristine state. Finding vintage pieces in "fine" or "mint" condition is exceptionally rare. Some people can buy a new car and have it looking like it's ten years old within six months of leaving the showroom.
73 KE7TPA

What goes?!
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AA4HA
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Posts: 1377




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« Reply #5 on: December 26, 2013, 06:40:26 AM »

Very interesting use for the triangle wave. I will need to try that out.

Thanks for figuring that out and sharing with us.

Tish
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Ms. Tisha Hayes, AA4HA
Lookout Mountain, Alabama
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