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4hv.org :: Forums :: General Science and Electronics
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FG 7000 Function Generator HELP

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Dr. H.
Sun Feb 24 2008, 07:49PM Print
Dr. H. Registered Member #931 Joined: Mon Jul 30 2007, 05:25PM
Location: Bulgaria
Posts: 486
Hi guys
I got this function generator from a friend of mine, and everything works fine except the output level of the signal. The maximum voltage i can get on the output is just 3V wink. Does someone have a circuit or any information about this device, because I wasn't able to find anything sad .
Cheers Huben
1203882574 931 FT0 Pic 4662

1203882574 931 FT0 Pic 4661
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Bjørn
Sun Feb 24 2008, 08:10PM
Bjørn Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
Have you tried this: Link2
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Dr. H.
Sun Feb 24 2008, 09:01PM
Dr. H. Registered Member #931 Joined: Mon Jul 30 2007, 05:25PM
Location: Bulgaria
Posts: 486
Hi Bjorn
yes i saw this one, but the circuit doesn't have anything in common with my generator. The one from the PDF is based around MAX038, but mine doesn't have such an IC. It has some "205CN"IC ( in the lower right corner you can see it on the picture) for which i can't find a description either frown
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Experimentonomen
Sun Feb 24 2008, 10:47PM
Experimentonomen Registered Member #941 Joined: Sun Aug 05 2007, 10:09AM
Location: in a swedish junk pile
Posts: 497
Are you sure its even supposed to go above 3V ?
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Dr. H.
Mon Feb 25 2008, 04:42AM
Dr. H. Registered Member #931 Joined: Mon Jul 30 2007, 05:25PM
Location: Bulgaria
Posts: 486
For thet reason I am looking for a schematic or some kind of information. A litle more information - the output amplifier (MC1558) is powered by + / - 9V.
Cheers Huben
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ShawnLG
Mon Feb 25 2008, 05:40AM
ShawnLG Registered Member #286 Joined: Mon Mar 06 2006, 04:52AM
Location:
Posts: 399
Just because an OP amp is fed +/- 9Vp-p does not mean that it has to output 9Vp-p. You got yourself a very nice test equipment. Does it come with a cabinet?
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Dr. H.
Mon Feb 25 2008, 01:01PM
Dr. H. Registered Member #931 Joined: Mon Jul 30 2007, 05:25PM
Location: Bulgaria
Posts: 486
Hi ShawnLG
ShawnLG wrote ...

Just because an OP amp is fed +/- 9Vp-p does not mean that it has to output 9Vp-p.
I know that, but i find strange that the output signal to be only 3V at max.
Yes it has a cabinet smile

Cheers Huben
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