Feeding signals to an "unobtainable" LSI control chip - even via a blocking C - is just a bit too scary for me! I'd feel much happier with better buffer isolation.
Dear Tony, I think you permanently referenced the PSG ground to the coax ground (with that short wire), which is permanently referenced to the main ground like you said. Just connect the coax shield before the ground mod.
What is the lowest step you can tune that reference output? Despite there is no possibility to turn off the compensation inside the generator unit, there is still possibility, that if you tune that reference slightly off the 50MHz and input the "right" correction constant into that generator unit, you end up with much better results than you have now. The reference is stable. Even if it is tuned a little bit off the 50MHz. And that compensation is just a number that shifts the divisions/multiplications inside that generator unit, so if theese two things are stable, then the result must be stable too. Theese two things both goes in steps and the accuracy of the result depends on, well, stability of that reference, but also on how that two steps/values sits each other. So as I saw the long string of zeros in the reference programming software, I thought myself that maybe, maybe there is some space to improve the result of this modification. I know, it's a lot of fiddling with upredictable result, but, at least, it's easy to put it all back as it was if/when you realize that this was nothing more than nowhere leading bad idea. Second thing. Are you a 100% sure that that compensation constant is only software frequency correction and does not affect frequency of that internal reference? I am pretty sure, that that constant does the software compensation, but I am not so sure that it does ONLY software compensation. I am thinking of things like two different compensations affected by one number, like e.g. some part of that number affects software compensation and other part varies some voltage applied to the internal reference. And it is easy to be sure if it is software thing only, or not, just hook up the internal reference to the counter and vary that compensation constant. If the output frequency stays stable, then it is software only. And on top of that all. I am not sure about some simple corelation between the entered number and the quantity of compensation. It's chinese product, which means be prepared to anything.
Здравствуйте, хотел спросить а генератор JUNTEK PSG9080 можно запрограммировать там где программируются последовательность различных сигналов во вкладке FUNC, чтобы работали SWEEP, VCO и модуляция? Если не знаете, попробуйте пожалуйста, очень нужно знать, делаю выбор. Hello, I wanted to ask if the JUNTEK PSG9080 generator can be programmed where the sequence of various signals is programmed in the FUNC tab so that SWEEP, VCO and modulation work? If you don't know, please try, I really need to know, I'm making a choice.
how do the 3000 series hantek compare to this I'm torn I need a unit and can spend up to around 400$ this is for someone who I'm teaching and they need it to do whatever they will need and we know its now 1000+$ unit
I need to synchronize the generator with the oscilloscope The port sync out phase syncs other generators Is there some resource I can be using to extract the start sync pulse out? thanks
In case of bricking due to firmware update failure, switch on ACmains button WHILE kepping pressed keypad "8" and push PwrOn once, then release keypad "8". This will bring up bootloader menu alowing you to reflash propper firmware. Just happened to me.
Drifts terribly, even after 24 hours warm-up. A real shame it doesn't have a 10MHz ref input to lock it down. I want to like the unit, but it's useless for precision radio work.
Nice Looking weak components ...mine faulted just 3 months of use ....faulty display ..no spare part, no support, the factory don't respond to my emails
Great video! Lots of info, toggle switch, why to reboot when switching from int. to ext., resistors…..👍 Bummer!! That the software worked against you. It doesn’t seem that any of the AliExpress generators have an ext ref?? I think we would all pay $10 more more that option. ⭐️⭐️⭐️⭐️⭐️
Hey Tony, I like your videos because you share a lot of information in a nice way. I bought a PSG9080 last week and had a bad idea to make a firmware update! Unfortunately, it bricks the device :-( Do you have an idea how the reactivate it ? Any idea is welcome ;-)
Thank you!.. sorry to hear that you bricked it.. i have no experience with that i must say. maybe try contacting Juntek maybe you can set it in some DFU mode like with some other devices.
Hello. I'v made a GPSDO PCB for my almoust same generator JDS6600. You will have a problem - manufacturer put a little correction offset in the software of generator. Therefore the output frequencies will be incorrect if you will inject exatly 24.000 MHz
@@TonyAlbusI'm able to fine tune my external reference with the 0.01Hz steps. While measuring 100MHz in counter mode it results in +/- 0.8 Hz reading step. It is because FPGA internal PLL multipliers and diveders which reduces the precision.
@@SQ5DBF Yes the software correction can help if the internal ref is not good. but if you mod it for external it works against you as we have seen.pity is can not be switched off.
Maybe you should have tested the idea first, it is a shame it's not a perfect idea :-(. I'm not picking fault, We all want to see the result Now!! :-D That is a strange waveform, would a squarewave reference help at all? Oh my frend said people from your area are the nicest and relaxed people in the world. I'm not making that up.
Testing it first :)) no i am going for it... but i have re-opend the box.. its eating on me a bit... the project is not finished :) what ever correction they did, we saw in the first tests it did not affect the frequency counter, so that one should be fixed now, and it was not.. so maybe i missed a trace in the multilayer and disconnecting it at that resister is not the only trace...so partly it still runs on the internal ref. to be continued .........
@@TonyAlbus It would be nice if there was a work around like being able to apply a small but permanent offset by a number of Hz in the external reference feed to compensate for the difference created within the Juntek. Of course you would only want to alter the feed for the Juntek whilst maintaining 10Mhz for the rest of your lab. Providing the shift was fixed you could then rely on the output of the Juntek producing 10Mhz spot on. It might be interesting to prove the concept by feeding the Juntek oscillator with a adjustable external reference by using the output of the Feeltech 6900 set to say 10.000.012 Mhz etc. I know its not a practical solution but it might make a nice video and as the Feeltech is using the external reference you could then achieve accuracy on the Juntek. Regards Ian M5AXA
Hoi Tony. Ik heb me gelijk geabonneerd nadat ik je callsign tegenkwam via je vader, F4VUP. namens PA1JOS. Hele interessante onderwerpen, en goed belicht kerel. Wie weet tot werkens op 1 van de banden. 73 van PH5V :-) 😎
@@TonyAlbus Dank je wel. En je hebt absoluut interessante video's. Goede uitleg. En wat betreft de sim. Inmiddels vlieg ik in VR... Ik help nog wel met het bouwen van cockpits van met name Boeing 737 en Cessna 152, en 172😊😊. Er zit aardig wat scripting aan vast... 🙏☺️
thank you very much again, very nice mod
Thank you too!
Your workbench is so clean! Doesn’t look like it has even seen a drop of solder.
Thanks, i mostly only clean and collect :)
Feeding signals to an "unobtainable" LSI control chip - even via a blocking C - is just a bit too scary for me! I'd feel much happier with better buffer isolation.
Hi Hector, yes you could even use a PLL circuit and make it autoswitching, but i wanted it as simple as possible. but you have a point there.
Dear Tony, I think you permanently referenced the PSG ground to the coax ground (with that short wire), which is permanently referenced to the main ground like you said.
Just connect the coax shield before the ground mod.
Thanks
What is the lowest step you can tune that reference output? Despite there is no possibility to turn off the compensation inside the generator unit, there is still possibility, that if you tune that reference slightly off the 50MHz and input the "right" correction constant into that generator unit, you end up with much better results than you have now. The reference is stable. Even if it is tuned a little bit off the 50MHz. And that compensation is just a number that shifts the divisions/multiplications inside that generator unit, so if theese two things are stable, then the result must be stable too. Theese two things both goes in steps and the accuracy of the result depends on, well, stability of that reference, but also on how that two steps/values sits each other. So as I saw the long string of zeros in the reference programming software, I thought myself that maybe, maybe there is some space to improve the result of this modification. I know, it's a lot of fiddling with upredictable result, but, at least, it's easy to put it all back as it was if/when you realize that this was nothing more than nowhere leading bad idea.
Second thing. Are you a 100% sure that that compensation constant is only software frequency correction and does not affect frequency of that internal reference? I am pretty sure, that that constant does the software compensation, but I am not so sure that it does ONLY software compensation. I am thinking of things like two different compensations affected by one number, like e.g. some part of that number affects software compensation and other part varies some voltage applied to the internal reference. And it is easy to be sure if it is software thing only, or not, just hook up the internal reference to the counter and vary that compensation constant. If the output frequency stays stable, then it is software only. And on top of that all. I am not sure about some simple corelation between the entered number and the quantity of compensation. It's chinese product, which means be prepared to anything.
Thanks very nice insight, but i will not put time in this... i never use it.
Really cool to see the inside and your lab. Thanks 🙏
Thank you!
Can you recommend a cheap signal generator for a beginner for audio frequencies, that doesn't need a ground mod?
Hi Mike, i think this one... and then you dont monifie it. i like this one , the menu is very simple.: ruclips.net/video/wtc5OSsvWG0/видео.html
@@TonyAlbus Thanks Tony, unfortunately that's out of my budget. But it does look interesting.
Здравствуйте, хотел спросить а генератор JUNTEK PSG9080 можно запрограммировать там где программируются последовательность различных сигналов во вкладке FUNC, чтобы работали SWEEP, VCO и модуляция?
Если не знаете, попробуйте пожалуйста, очень нужно знать, делаю выбор.
Hello, I wanted to ask if the JUNTEK PSG9080 generator can be programmed where the sequence of various signals is programmed in the FUNC tab so that SWEEP, VCO and modulation work?
If you don't know, please try, I really need to know, I'm making a choice.
I do not know and i have sold it already.
Which is better the Juntek PSG9080 or the Uni-T UTG962?
The form factor,display, menu i like better from the Juntek, stability much better on the Uni-t
how do the 3000 series hantek compare to this I'm torn I need a unit and can spend up to around 400$ this is for someone who I'm teaching and they need it to do whatever they will need and we know its now 1000+$ unit
Hi, i dont have the Hantek 3000, but did you have a look at the Siglent SDG series?
I need to synchronize the generator with the oscilloscope
The port sync out phase syncs other generators
Is there some resource I can be using to extract the start sync pulse out?
thanks
Hi, i am not an advanced user, i have never tried that.
In case of bricking due to firmware update failure, switch on ACmains button WHILE kepping pressed keypad "8" and push PwrOn once, then release keypad "8". This will bring up bootloader menu alowing you to reflash propper firmware. Just happened to me.
Thank you, i am sure that is very helpful for many!!
Drifts terribly, even after 24 hours warm-up. A real shame it doesn't
have a 10MHz ref input to lock it down. I want to like the unit, but
it's useless for precision radio work.
Hi Karl, yes i agree, you can see that in my video too. i would not buy it again.
Genial..!! 👌👌
Gracias!
Nice Looking weak components ...mine faulted just 3 months of use ....faulty display ..no spare part, no support, the factory don't respond to my emails
Great video! Lots of info, toggle switch, why to reboot when switching from int. to ext., resistors…..👍
Bummer!! That the software worked against you.
It doesn’t seem that any of the AliExpress generators have an ext ref?? I think we would all pay $10 more more that option.
⭐️⭐️⭐️⭐️⭐️
Thank you Randall! i guess you right, the cheaper generators do not have it, i even needed to add it to the Small popular Uni-T
Hey Tony, I like your videos because you share a lot of information in a nice way.
I bought a PSG9080 last week and had a bad idea to make a firmware update!
Unfortunately, it bricks the device :-( Do you have an idea how the reactivate it ?
Any idea is welcome ;-)
Thank you!.. sorry to hear that you bricked it.. i have no experience with that i must say. maybe try contacting Juntek maybe you can set it in some DFU mode like with some other devices.
@@TonyAlbus
No problem, I will send it back and wait for the new one ;-)
Hello, is your PSG9080 ok? , maybe I can help you
@@sjuntek5120 Hello, yes i got a new one thanks for the offer to help
Same problem here, I think there are 2 hardware versions, try the Joy-It firmware, mine is alive again.
Hello. I'v made a GPSDO PCB for my almoust same generator JDS6600. You will have a problem - manufacturer put a little correction offset in the software of generator.
Therefore the output frequencies will be incorrect if you will inject exatly 24.000 MHz
Yes same conclusion in my video, pity they did that.
@@TonyAlbusI'm able to fine tune my external reference with the 0.01Hz steps. While measuring 100MHz in counter mode it results in +/- 0.8 Hz reading step. It is because FPGA internal PLL multipliers and diveders which reduces the precision.
@@SQ5DBF Yes the software correction can help if the internal ref is not good. but if you mod it for external it works against you as we have seen.pity is can not be switched off.
@@TonyAlbus I solved this problem. Now readings of 9080 are presize and accurate even on 100 MHz.
Бик яхшы.
Thank you!
Maybe you should have tested the idea first, it is a shame it's not a perfect idea :-(.
I'm not picking fault, We all want to see the result Now!! :-D
That is a strange waveform, would a squarewave reference help at all?
Oh my frend said people from your area are the nicest and relaxed people in the world.
I'm not making that up.
Testing it first :)) no i am going for it... but i have re-opend the box.. its eating on me a bit... the project is not finished :)
what ever correction they did, we saw in the first tests it did not affect the frequency counter, so that one should be fixed now, and it was not.. so maybe i missed a trace in the multilayer and disconnecting it at that resister is not the only trace...so partly it still runs on the internal ref. to be continued .........
@@TonyAlbus It would be nice if there was a work around like being able to apply a small but permanent offset by a number of Hz in the external reference feed to compensate for the difference created within the Juntek. Of course you would only want to alter the feed for the Juntek whilst maintaining 10Mhz for the rest of your lab. Providing the shift was fixed you could then rely on the output of the Juntek producing 10Mhz spot on. It might be interesting to prove the concept by feeding the Juntek oscillator with a adjustable external reference by using the output of the Feeltech 6900 set to say 10.000.012 Mhz etc. I know its not a practical solution but it might make a nice video and as the Feeltech is using the external reference you could then achieve accuracy on the Juntek. Regards Ian M5AXA
@@M5AXA That is an very interesting idea, thank you!
Hoi Tony. Ik heb me gelijk geabonneerd nadat ik je callsign tegenkwam via je vader, F4VUP. namens PA1JOS. Hele interessante onderwerpen, en goed belicht kerel. Wie weet tot werkens op 1 van de banden. 73 van PH5V :-) 😎
Hallo Marcel, wat leuk dat jij ook kijkt, ik heb meteen beide calls bekeken natuurlijk. Impressive simulator BTW!.
73 Tony PE1ONS
@@TonyAlbus Dank je wel. En je hebt absoluut interessante video's. Goede uitleg. En wat betreft de sim. Inmiddels vlieg ik in VR... Ik help nog wel met het bouwen van cockpits van met name Boeing 737 en Cessna 152, en 172😊😊. Er zit aardig wat scripting aan vast... 🙏☺️