Products > Test Equipment

FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator

<< < (374/450) > >>

soundtec:
'Rigol' sprung to mind when I saw the 6900 too.

Maybe we will finally see a more usable version of the software from  FT soon ,

Just looking at the new manual now ,not sure if theres much difference , but hard to know for sure .
Maybe it has an improved clock ,output op amps, better supply ,and more accuracy across different output voltage ranges.

I see a few posts around in here relating to developing a software for these series of machines , basically external control ,
Id quite like a way of generating a series of audio tones for testing in conjunction with 'REW FFT' software to look at %THD .
I was able to get reliable sine waves at certain frequencies down to a THD of around 0.003% , less favourable frequencies show upto around the specified 0.5% of distortion .

Cliff Matthews:
For those thinking a PDF might have been a better idea..  :-/O

bdunham7:
The only differences I see are the increased max Vp-p of 24V and the elimination of the 100uV step in the amplitude setting.  I guess we'll wait for a teardown to see what they've done for the power supply this time--but I'm not expecting much!  Meanwhile, the prices of the FY6600-60MHz have hit $40 on eBay, so if you like the idea of multiple synced units, now is the time to pick some up.

Johnny B Good:

--- Quote from: beanflying on June 09, 2019, 11:15:14 am ---You are assuming the big fat Earth pin is connected inside the box  :-DD  :horse:

--- End quote ---

 They've most likely repeated the mistake they made with the FY6800 and created a hard connection to the BNC grounds.  If they're still monitoring this thread, then they may well have used a link to the PE via a 1KR to 10KR "drain resistor" to squash the half live touch voltage down from 90 to 110vac  to 50 to 500mV 50Hz on a 240v supply without introducing the evil effect of an unwanted mains routed ground loop, a feature which hadn't cursed the earlier FY6600 (but at some risk of ESD damage to any devices under test).

 It will be interesting to see whether they fixed their skoolboy howler with the earthing of the FY6800 where they not only created an earth loop issue but had also, to add insult to injury, hijacked one of the two ground returns in the PSU to main board ribbon cable connector on account it was just the right length to reach the PE tag on the mains socket.

 Assuming the PSU board is still the same class II double insulated job used in the previous 6600 and 6800 versions it also won't requre a hard protective earth anyway. Providing a hard protective earth connection in the 6800 did more harm than good. One can only hope they've learn't their lesson by now. Has anyone managed to get hold of an FY6900 to check this out yet?

JBG

GerryR:
Hello, new here to this forum.  I had just purchased an FY6800-60M and ended up returning it.  The DC offset was over 35mV when set to 0.  There was a lot of jitter in frequencies above 20 MHz or so.  Amplitudes were way off into a 50 ohm load; there was considerable distortion in the output into a 10 k load.  Square waves started to look more and more like sine waves as frequencies got past 15 MHz.  Etc. Etc. Etc.   I haven't read all the posts in this thread yet, so I don't know if any of these problems have been experienced by others, but I am curious to know what others have found in actual use, i.e. tied to a real circuit and not just an o'scope.  Any input will be appreciated.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod