to disable the beeper: power off the unit, hold in the selection knob and power back up. beeper will remain disabled unless/until you perform the same sequence to re-enable it.
Thanks for the interesting test/review John. I would be wanting to use the unit for AM/FM receiver alignment and have downloaded the FY3200S manual to investigate further. However I am unclear as to whether the ASK/FSK modes allow an external modulating voltage to linearly modulate the Generator in the traditional manner, or they only allow distinct shifts between 2 amplitudes/frequencies depending on the mode? Also, what is the nature of the internally stored AM/FM waveforms - is the modulating frequency on them at 400Hz or 1kHz or similar suitable for use in AM/FM receiver alignment? Regards, Mark.
I bought one that arrived this morning. The display lights up, but nothing else works. No beeps, no output from front or rear sockets, just 'nothing' but a bright, blank display. I've sent a message to the supplier, let's see how long it takes to get a response? And yes, I looked at it on the scope and even with no signal generated by it there was noticeable mains hum, especially when I turn it off.
Let us know how they treat you with the claim. I'd open it and be sure the supply is fully connected since there are multiple rails used. Loss of one of the logic voltages may make it act dead.
@@JohnAudioTech John, They did ask me to check the rails. I don't mind but I feel it inappropriate for a customer to do fault finding on a new unit. I found +5v, -12v, but no +12v. I have informed them of this .. I await their decision.
I agree but it is easy to make a simple fix rather than shipping stuff back and hope the seller is reliable and honest. Hopefully they don't give you any friction.
Hi, I see you are achieving high voltage. Do you know someone that can configure a cheap RF Amplifier to work with this signal generator? I am looking for about 25 watts output.
Hello John Excellent presentation which was very useful to me I ask you if you then did the review and saw the Tube Premamplifier that appeared at the beginning of the video. I would be very interested and curious to see it or buy it but I don't have any contact information from you Greetings
I just watched it. It is a good mod but a lot of effort for this thing. I guess he needed a reason to float the outputs. I would rather ground them since most equipment (scope lead sheilds) are grounded anyway.
Yup damaged my iPhone7 that was on the lab table. That 58VAC is coming out of this piece of shit even if it is powered off! 2 leads on the table and off we go. Only noticed it because of this tingling sensation on my skin... Now is there anything that can be done to stop this mains leakage or do I just toss this into a trash bin?
I'm surprised at how little is inside it. There's probably an option to disable the beeper, or just put some tape across the hole! I'm still using my tablet as an audio signal generator as I have an app for that, it works fine for sine wave output, it's very clean with practically no distortion whatsoever all the way up to 20khz, but square and sawtooth waveforms are terrible on it, it just can't cope.
Its a 10 or 12 bit DDS generator from what I can gather, so all you need is crystal, microcontroller, DDS generator chip and output fast opamps, the wonders of direct digital synthesis take care of the S/N and distortion. And yes becase its DDS you'll see the sample rate as steps in the output, but all that is high frequencies, doesn't affect the audio spectrum one bit.
Here is a video for a replacement of the power supply Its a power supply leakage of about 8 watts going to ground. czcams.com/video/FF2lk03mNto/video.html
Been using one a while on various consumer audio gear. No problems, no hum, residual distortion under .05% - better than I expected.
to disable the beeper: power off the unit, hold in the selection knob and power back up. beeper will remain disabled unless/until you perform the same sequence to re-enable it.
Congratulations on 10k John, you continue to be the authority on this stuff. Top stuff
Thanks Ben!
can this provide two different waveforms at the 2 channels or a single type at both channels? and how much it costed?
Thanks for the interesting test/review John. I would be wanting to use the unit for AM/FM receiver alignment and have downloaded the FY3200S manual to investigate further. However I am unclear as to whether the ASK/FSK modes allow an external modulating voltage to linearly modulate the Generator in the traditional manner, or they only allow distinct shifts between 2 amplitudes/frequencies depending on the mode? Also, what is the nature of the internally stored AM/FM waveforms - is the modulating frequency on them at 400Hz or 1kHz or similar suitable for use in AM/FM receiver alignment? Regards, Mark.
So, this would be okay with an isolation transformer and a genuine ground?
👍👍Thanks! Great channel!
Can the USB connector be used for programming and control via a PC?
LoL! "Feel the FeeTech 8-)" Thanks for the review, I am not an audio guy but appreciate your review, and yes Class-D ampli are nice.
are grounds of both the outputs common / connected ?
Do you have the software interface to communicate with it?
Mine shows a DC component between GND and the core of the plug of the channels! Even if channel is disabled!
Any way I could fix this?
Does this work for measuring the oscillator frequencies in a transceiver?
It should,but i will earth it before
How to make pulse wave sir ?
do signal generators work independently or do they require another device to generate tones?
I want to use it for mediation, but i dont have any speakers or anything.
Wonder why they don't make it smaller if there's so much space inside
I bought one that arrived this morning. The display lights up, but nothing else works. No beeps, no output from front or rear sockets, just 'nothing' but a bright, blank display. I've sent a message to the supplier, let's see how long it takes to get a response? And yes, I looked at it on the scope and even with no signal generated by it there was noticeable mains hum, especially when I turn it off.
Let us know how they treat you with the claim. I'd open it and be sure the supply is fully connected since there are multiple rails used. Loss of one of the logic voltages may make it act dead.
@@JohnAudioTech John, They did ask me to check the rails. I don't mind but I feel it inappropriate for a customer to do fault finding on a new unit. I found +5v, -12v, but no +12v. I have informed them of this .. I await their decision.
I agree but it is easy to make a simple fix rather than shipping stuff back and hope the seller is reliable and honest. Hopefully they don't give you any friction.
Doe's this come with a decent manual ... What is the range of the counter ? ? ?
Never received manual with mine I just received.
Is recommendable now 2023 ??
Will you be sending it back then if its not good for audio?
No. It gives me access to a few megahertz, two channels and a host of other features that I didn't have before. It has a lot of uses beyond audio.
Hi, I see you are achieving high voltage. Do you know someone that can configure a cheap RF Amplifier to work with this signal generator? I am looking for about 25 watts output.
8:33 looks like a sinc function
my guess: MF main frequency and SF Secondary Frequency
We have a new signal generatorJDS8000. Can you help us evaluate it?
Please contact me at johnaudiotech@gmail.com
Hello John
Excellent presentation which was very useful to me
I ask you if you then did the review and saw the Tube Premamplifier that appeared at the beginning of the video.
I would be very interested and curious to see it or buy it but I don't have any contact information from you
Greetings
I reviewed it around the time of this video. Nothing special, though.
If that 58VAC is un protected it can be a KILLER. Investigate to see where it's coming from and correct it for a video.
Have you seen SDG Electronics channels modification to this unit ? Episode#32 .
I just watched it. It is a good mod but a lot of effort for this thing. I guess he needed a reason to float the outputs. I would rather ground them since most equipment (scope lead sheilds) are grounded anyway.
Yup damaged my iPhone7 that was on the lab table. That 58VAC is coming out of this piece of shit even if it is powered off! 2 leads on the table and off we go. Only noticed it because of this tingling sensation on my skin... Now is there anything that can be done to stop this mains leakage or do I just toss this into a trash bin?
Tie the shield of the output lead to earth ground. You can also use an isolation transformer on the mains.
I'm surprised at how little is inside it. There's probably an option to disable the beeper, or just put some tape across the hole! I'm still using my tablet as an audio signal generator as I have an app for that, it works fine for sine wave output, it's very clean with practically no distortion whatsoever all the way up to 20khz, but square and sawtooth waveforms are terrible on it, it just can't cope.
Its a 10 or 12 bit DDS generator from what I can gather, so all you need is crystal, microcontroller, DDS generator chip and output fast opamps, the wonders of direct digital synthesis take care of the S/N and distortion. And yes becase its DDS you'll see the sample rate as steps in the output, but all that is high frequencies, doesn't affect the audio spectrum one bit.
Here is a video for a replacement of the power supply Its a power supply leakage of about 8 watts going to ground. czcams.com/video/FF2lk03mNto/video.html
I have one and hate it.
Why do you hate it? What firmware is on yours?
Mine freezes and resets itself randomly. Mine is Rev 2.0 2010-2014. I shall have to go find the firmware :)
Any updates? Does it work better now?
Well the interface is awful. It needs three knobs, frequency, mode and amplitude and a better display!