Products > Test Equipment

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

<< < (357/450) > >>

Andreax1985:
Ok, I must make some correction to what I wrote. I admit my inexperience in the field so please be gentle with me.

i) I was probing the output from the FY6800 with regular 1x passive probes, connecting the red awg terminal to the probe tip and the black awg terminal to the probe ground. Apparently, this was the cause of the attenuation. Instead, if I use the BNC-BNC connector from the awg directly into the scope, I observe much less attenuation and what I see is in agreement with the specs of the device. Why using regular probes gives me issues?

ii) with low amplitude settings (less than 100mV) I observe more and more dc offset (the lower the amplitude the higher the offset). If I use my scope in AC coupling mode, no offset is observed. Can I consider this a normal behaviour of the device? For your reference, with a sine wave 100mVpp I measure a 10% offset.

beanflying:
For DC offset my 6600 was off by a bit. Either search the thread or go a page or two either side of this link where there was some discussion about tweaking them while stroking our grey beards with the correct tongue angle ...... Naked or not I will leave it to your imagination  >:D https://www.eevblog.com/forum/testgear/feeltech-fy6600-60mhz-2-ch-vco-function-arbitrary-waveform-signal-generator/msg1351221/?topicseen#msg1351221

Not a perfect solution but it got mine closer to the truth.

Andreax1985:
And why using scope passive probes to measure the signal I read an attenuated signal from 3Mhz onward, whereas using BNC-BNC cable the signal maximum amplitude is in agreement with specs up to 30Mhz?

beanflying:

--- Quote from: Andreax1985 on February 10, 2019, 10:59:33 pm ---And why using scope passive probes to measure the signal I read an attenuated signal from 3Mhz onward, whereas using BNC-BNC cable the signal maximum amplitude is in agreement with specs up to 30Mhz?

--- End quote ---

Have a look at this and some of the other W2AEW videos on scopes but basically don't use 1X probes :)

https://youtu.be/SX4HGNWBe5M

CDaniel:
I forgot to mention that tweaking those pots for DC offset could decalibrate the amplitude of the signal , so you have to have a good calibrated AC multimeter or oscilloscope before attemting . This is not for beginers , you have to know what are you doing .
Anyway this offset is best measurable with a DC multimeter ... I would not trust an oscilloscope

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