Products > Test Equipment

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

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pantelei4:

--- Quote from: radiolistener on August 22, 2019, 10:22:50 am ---I added some pictures on how to connect signal generator to measure amplitude properly.

--- End quote ---
For whom?

radiolistener:

--- Quote from: pantelei4 on August 22, 2019, 10:29:31 am ---For whom?

--- End quote ---

you already know that. But many peoples trying to use direct connection of signal generator to the oscilloscope with no impedance match and have measurement issues because of that. And they don't know how to connect signal generator for proper amplitude measurements So I think it will be useful information for these peoples :)

Even people who knows that, often forgot it and make measurement mistake :)

pantelei4:
Thus, the JDS6600 with a memory length of 2048 points has only 10 bits of resolution on the sine and 11 maximum on the ramp. Unfortunately, I can’t verify this, because I broke it against the wall. :horse:

CDaniel:

--- Quote from: radiolistener on August 22, 2019, 10:43:26 am ---
--- Quote from: pantelei4 on August 22, 2019, 10:29:31 am ---For whom?

--- End quote ---

you already know that. But many peoples trying to use direct connection of signal generator to the oscilloscope with no impedance match and have measurement issues because of that. And they don't know how to connect signal generator for proper amplitude measurements So I think it will be useful information for these peoples :)

Even people who knows that, often forgot it and make measurement mistake :)

--- End quote ---

This is not impedance "mach" , just loading the signal at the scope input with 50ohm or whatever lowish ohm value will eliminate some of the the probes impedance effect . But of course you can't use 10x attenuation , the signal is too low .

radiolistener:

--- Quote from: CDaniel on August 22, 2019, 12:38:47 pm ---scope input with 50ohm or whatever lowish ohm value will eliminate

--- End quote ---

No, the only way to get correct amplitude is to use exactly the same input impedance as your cable impedance. If you use 50 Ohm coax cable, you're needs to use 50 Ohm terminator. With any other value, for example 30 Ohm or 70 Ohm, amplitude will depends on frequency and cable length, so you cannot believe it. :)

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