Author Topic: Would like recommendations on function generator  (Read 2245 times)

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Offline adauphin

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Would like recommendations on function generator
« on: March 08, 2018, 02:45:18 pm »
This will be to compliment my 1054Z I'm awaiting delivery on. Not sure where to look, would like to stay under $200 if possible....under $100 would be even better.. 8)

Projects will include basic electronics diagnosis and repair. I have one of these that came with my 465B, most sure how well it fares to the modern crop for basic things.



 

Offline Gandalf_Sr

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Re: Would like recommendations on function generator
« Reply #1 on: March 08, 2018, 04:06:11 pm »
Hi, I just bought a Rigol DS1022Z from Tequipment.net but, at $330 (after discount) that's above your budget although it is great bang for your buck and has the neat feature that it can capture and repeat waveforms from Rigol scopes (check the 1054Z can do that rather than rely on my statement here).

You can get cool-looking 15 MHz DDS generators from eBay e.g. feelgood for $100 and they are just OK but very poor build quality and prone to all kinds of firmware issues, thread here about them.

Or you could look for used on eBay.
I'd like to make the world a better place but they won't give me the source code
 

Offline NivagSwerdna

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Re: Would like recommendations on function generator
« Reply #2 on: March 08, 2018, 04:31:27 pm »
I have a SDG1025 but to be honest it is the piece of equipment I use least... What do you want a Signal Generator for? Maybe your $ are better spent elsewhere?
 

Offline adauphin

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Re: Would like recommendations on function generator
« Reply #3 on: March 08, 2018, 06:03:07 pm »
Maybe your $ are better spent elsewhere?

Most likely so. I'm thinking it's more of a necessity than whether or not I actually need it....thinking on being prepared but it's likely overkill for my needs.

Mainly looking to diagnose home stereo equipment and analyze audio equipment signal paths for distortion, signal purity, etc. Looking at input and output of preamps, amps, cables, crossover networks.

A frequency generator of some sort will likely be all I need and could get an app for that. Not sure if I only need a signal, ie, 1khz or other types of waveforms other than a reg sine wave.
 

Offline NivagSwerdna

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Re: Would like recommendations on function generator
« Reply #4 on: March 08, 2018, 06:09:46 pm »
A frequency generator of some sort will likely be all I need and could get an app for that. Not sure if I only need a signal, ie, 1khz or other types of waveforms other than a reg sine wave.
That 4001 Pulse Generator might be all you need.
 

Offline Gandalf_Sr

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Re: Would like recommendations on function generator
« Reply #5 on: March 08, 2018, 08:43:43 pm »
There's an audio Function Generator for the iPhone, looks pretty cool. I just bought the Pro version for $1.99 (no adverts), that's within your budget :D
I'd like to make the world a better place but they won't give me the source code
 

Offline bd139

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Re: Would like recommendations on function generator
« Reply #6 on: March 08, 2018, 08:58:44 pm »
Look out for an HP 3312A. It’s a thing of beauty.
 
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Offline neo

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Re: Would like recommendations on function generator
« Reply #7 on: March 08, 2018, 09:14:43 pm »
Look out for an HP 3312A. It’s a thing of beauty.

I second that! Wonderful device.  :-+
A hopeless addict (and slave) to TEA and a firm believer that high frequency is little more than modern hoodoo.
 

Offline SMB784

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Re: Would like recommendations on function generator
« Reply #8 on: March 08, 2018, 09:32:05 pm »
I recommend the FeelTech FY6600. We are on the process of reverse engineering it to work out the bugs, and to unlock the extra frequency capabilities built into the lower price models. I would recommend buying the 15 or 30 MHz model (both are <$100) and using the firmware in the thread I just linked you. Very capable unit.
Laser Physicist, Electronics Hobbyist
My bench: Siglent SDS1104X-E (Fully optioned), HP 53131A (Opt: 012, 030), HP 3457A (High Accuracy Mod), HP 3631A, HP 8561A
 

Offline mdijkens

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Re: Would like recommendations on function generator
« Reply #9 on: March 08, 2018, 09:43:36 pm »
I've got a FeelTech 2300H for over a year now. Use it regularly and works excellent
I paid just under $100 with free shipping
 

Offline tautech

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Re: Would like recommendations on function generator
« Reply #10 on: March 08, 2018, 11:08:58 pm »
There's an audio Function Generator for the iPhone, looks pretty cool. I just bought the Pro version for $1.99 (no adverts), that's within your budget :D
Be interested to see it's capabilities if you want to do a thread and add some real scope screenshots.
You can grab iPhone screenshots of the UI too using the Home/Power button press and they end up it the pictures folder.



Everybody's 'right now' FG requirements are very different, it's what you might need 'down the track' if your interest shifts from audio to digital for example. My first was an old Philips 2 MHz and it served my 'then' very basic FG requirements OK however when I had the chance to update it and then discover the abilities of a more capable AWG the poor old Philips unit has never been used since. I should really sell it to someone just getting started.........
These are my fav now for best bang for buck.
https://www.eevblog.com/forum/testgear/siglent-sdg1000x-waveform-generators/
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Offline Adrian_Arg.

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Re: Would like recommendations on function generator
« Reply #11 on: March 08, 2018, 11:25:25 pm »
I've got a FeelTech 2300H for over a year now. Use it regularly and works excellent
I paid just under $100 with free shipping

I wait :D :D
 

Offline rhb

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Re: Would like recommendations on function generator
« Reply #12 on: March 09, 2018, 12:04:22 am »

Mainly looking to diagnose home stereo equipment and analyze audio equipment signal paths for distortion, signal purity, etc. Looking at input and output of preamps, amps, cables, crossover networks.

A frequency generator of some sort will likely be all I need and could get an app for that. Not sure if I only need a signal, ie, 1khz or other types of waveforms other than a reg sine wave.

For what you want to do a good sound card and Octave/MATLAB are the way to go.  For audio frequency work read, "Max Wien, Mr. Hewlett and a Rainy Sunday Afternoons" by Jim Williams.  It's a great article and project.  With proper signal processing the sound card will beat the HP distortion analyzer that Jim used.

The classic single signal audio test is a 1 KHz square wave with a fast rise time.
 


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