That 21V is inevitable with a switcher. It is caused by the Y1 caps passing a tiny amount of 50Hz current. But it is behind a huge impedance, so although you may possibly feel a tiny tingle, it is not dangerous.
well that amplitude deviation check starting at 26:30 should be done using a 50 ohm terminated input. otherwise reflections may interfere with the signal at certain frequencies and result in the amplitude being "unexpectedly" decreasing or increasing. not that it was necessarily the case here, though, but not impossible.
You get my thumbs up even for another unboxing video! I am making a reaction video to your unboxing video right now ! JunTek they really need to fire their marketing manager. You know I’m a terrible brand snob but the functionality you get from modern test gear is simply unbelievable for someone like me who saved for more than a year to buy there first crappy scope. The slight standing voltage on the PSU is probably the RFI capacitor. Try doing the level test with a 50 ohm terminator at the high frequency your seeing a standing wave I think. Thanks for the channel plug very kind of you to mention me thanks. Regards Chris
Hello. I have just purchased the PSG9060 model, model equipped with a Bluetooth card (Smart Module) to be connected to the TTL Ext port. Do you know how to operate it from an android smartphone? My phone locates the card correctly but I cannot connect via applications downloaded from Google Play ...
I got a similar generator some time ago via Banggood therecare now many units from various manufacturers, with basically identical features. Differemces mainly in housing design, buttons etc. Mine has more buttons for the specific operations/features rather than the soft buttons on the screen edge. Operationally works well, but mine has a serious defect on channel 2 where DC offset does not work correctly. So far not botheted to diagonse and fix it. Had a look briefly and I suspect it may even be a programming issue rather than hardware defect. Will sometime go through the hardware again maybe draw a cct diagr. One aspect is that the 80MHz will only work on sinewave, with some level rolloff as you are finding. On waveshapes the freq range is far more restricted. One feature I liked is ability to store a number of ARB waveshapes many generators limit to only one to four, but this unit is more like 15 to 30 waveforms. The sweep, burst and modulation is also very flexible. This unit does look well made.
Nice product review. Only very amazed by your scope comment of those not being calibrated and such. I'd like to see the real input values when I use a scoop. Taking into account that from certain price points the accuracy gets better.
The accuracy depends a lot on the probes and test setup, sure they are pretty close, but you can get more accurate measurements with other gear sometimes.
When you were checking your Frequency Response - you said 90Mhz and the Generator is only 80Mhz. So if you were right it is actually able to output over its stated range.
Yeah, the name is kinda weird to us, but i have a couple of their 90v industrial buck converter all-in-one modules and they are really professionally built! Never miss a beat.
Someone please show me a simple programming procedure, since I cannot figure out how to program it. I just want to generate a sine curve voltage and a rectangular curve voltage in this order.
Well that's not bad at all :-D Maybe the "sharp" was shape of waveform. I expected plenty of space inside to keep a couple of good sandwiches, but not as empty as the old blackstar frequency counter ha ha, it passes the space test :-D A switch mode psu with no heatsink on the drive chip/mosfet, i know it does not need it but my head says eeek! . No shelding to stop the switchmode emissions upsetting close equipment. i'm such a moaning sod :-D
@@jeffescortlx Err well it was an accident, i didn't mean to two time you, i could not help myself. it's like seeing a pretty woman and well, ok i won't do it again, i promise. Your videos are the best, honest :-D
@@jeffescortlx Well i thought you would be upset, what kind of lover are you ha ha :-D Don't forget i'm english so im madder than an owl playing a banjo :) Now that would be interesting to watch :-D
I bought two of this for my job (5-56 time cheaper then Keiysight). In gneral pretty good, however when I try to drive them synchronously thru single clock when first drive the other I got distortion in pulse wave output. Additionally the BNC connectors on the back are not properly installed. They appear to short . The plastic mold is properly done just the holes are not properly cut out and the connector is too deep.
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.
Hello my friend, thank you first for your video but I am actually running into a big problem with this device when I updated its firmware from Juntek official website. After updating I received a successful message concerning the update process and after that the device went into a dead mode. No display nor anything else but only the On/Off power button in blue. Any idea on how to fix this problem?
Has any body noticed a whistling noise from the power supply board when the unit is plugged in but turned off (Standby)? And also a fast clicking noise when powering up during the welcome screen?
Hi! I did not find in the description of the device the function of setting the output amplitudes depending on the load resistance. for example High Z mode as in Rigol generators. is there such a possibility in this device?
there is no setting for displaying amplitude units. It always show value for HiZ. When you connect 50 Ohm load, you will need to divide displayed value by 2 to get actual amplitude on the load.
Can you please tell me what what is minimum frequency resolution on the 60 MHz range and how stable is it? For example, can one set it to 60,000,003.027 Hz. I have an application where high frequency accuracy and stability are required. Thanks in advance.
DDS generators are usually not as clean as a proper RF signal generator, so it may not be suitable for your task, however I will fire it up when I get the chance and check the frequency jitter and resolution for you and let you know.
I just got a Juntek PSG9080 and noticed that I cannot change the amplitude with the Ampl. control. I have to change the Offset to get the amplitude to change. Is that normal?
@Dimdim DC DOES have amplitude and as I said it can be changed on the PSG9080 with the Offset control. But you can't have BOTH amplitude AND offset. Well, maybe you can, but they would just add together. In any case, I would expect the amplitude control to work for DC.
I ended up accidentally shorting the channel 1 output and the generator will no longer turn on. I tested the power supply and it is still working as expected, beyond that I am unaware of what the issue can be. Anyone have any advice for troubleshooting? Doesn't help that all the part numbers are impossible to read
shorting out the output shouldnt kill a function generator... but sounds like maybe the power supply is gone..... late but you would start by measuring the voltage rails
@@rokiedecentra9656 I found an imploded capacitor in the power supply circuit and replaced it. That didn't fix it and I still couldn't identify the issue. As far as I could tell the whole circuit was getting power where it was supposed to, but it was unable to turn on.
@@Bluebirdinhell a bad capacitor usually doesnt kill a circuit but it depends what it was doing, if you made sure all the voltage rails are present then you would start tracing out what is fed first by the power supply. Rarely a bad power supply can take out essential parts of the circuit and at that point it may not be worth fixing
I am shocked. This is supposed to be a test equipment, a signal generator, with protection in place like overcurrent or reverse voltage. Would 50ohm mode help in short circuit case?
The device is good, but after installing the software, an error pops up "Run-Time Error 13. Type mismatch". And not a single review of the device has a word about this problem! The software has not been updated for 8 months, which means Juntec programmers are not looking for a solution to the problem!
Sorry I cannot help either, I haven’t tried any software as I use a Mac. Have you tried running it as an Administrator, that can solve odd problems sometimes.
@@TheDefpom, Thanks for the advice. I tried running on behalf of the administrator, but the error is the same "Run time error 13". I also think about switching to Mac
Definitely not, especially if it is one of the earlier synthesizers from the '70s like the 8640B which is still considered one of the best performing synthesizers in terms of phase noise ever produced.
I think that's a bit unfair. I see it as more, try and find me an American or German made piece of test equipment that meets or exceeds the performance at or around the same price(You'd be hard pressed to find even a 10Mhz DDS for this price if it wasn't made in China). Also, most things sold and bought in the U.S are Chinese made anyways. The vast majority of the innerds of electronic/electric devices was probably manufactured in Taiwan or China if you've ever cared to look.
Erasing chip numbers to avoid being copied... by other Chineses! An external 5V in parallel of the PS is not a good idea. AC voltage between ground is normal between all floating equipment.
The dips are due to standing waves because you are using the 1Meg input on your scope. You should use 50 Ohms.
This is the best review for PSG9080. Appreciate that you displayed all the values on the oscilloscope.
That 21V is inevitable with a switcher. It is caused by the Y1 caps passing a tiny amount of 50Hz current. But it is behind a huge impedance, so although you may possibly feel a tiny tingle, it is not dangerous.
well that amplitude deviation check starting at 26:30 should be done using a 50 ohm terminated input. otherwise reflections may interfere with the signal at certain frequencies and result in the amplitude being "unexpectedly" decreasing or increasing.
not that it was necessarily the case here, though, but not impossible.
Great review, thanks Defpom!
Love my PSG9080
Nice review and tare down, I also like the way you put in timings for your video. Excellent.
You get my thumbs up even for another unboxing video! I am making a reaction video to your unboxing video right now ! JunTek they really need to fire their marketing manager. You know I’m a terrible brand snob but the functionality you get from modern test gear is simply unbelievable for someone like me who saved for more than a year to buy there first crappy scope. The slight standing voltage on the PSU is probably the RFI capacitor. Try doing the level test with a 50 ohm terminator at the high frequency your seeing a standing wave I think. Thanks for the channel plug very kind of you to mention me thanks. Regards Chris
Great little signal generator 😊
Hello. I have just purchased the PSG9060 model, model equipped with a Bluetooth card (Smart Module) to be connected to the TTL Ext port.
Do you know how to operate it from an android smartphone? My phone locates the card correctly but I cannot connect via applications downloaded from Google Play ...
Do the bumpers come off?......i always remove them from my gear. Also, I assume the front panel size is standard size per other gear?
IanScottJohnston - they seem pretty solidly attached, I didn’t try pulling that hard though.
I got a similar generator some time ago via Banggood therecare now many units from various manufacturers, with basically identical features. Differemces mainly in housing design, buttons etc.
Mine has more buttons for the specific operations/features rather than the soft buttons on the screen edge. Operationally works well, but mine has a serious defect on channel 2 where DC offset does not work correctly. So far not botheted to diagonse and fix it. Had a look briefly and I suspect it may even be a programming issue rather than hardware defect. Will sometime go through the hardware again maybe draw a cct diagr.
One aspect is that the 80MHz will only work on sinewave, with some level rolloff as you are finding. On waveshapes the freq range is far more restricted.
One feature I liked is ability to store a number of ARB waveshapes many generators limit to only one to four, but this unit is more like 15 to 30 waveforms.
The sweep, burst and modulation is also very flexible.
This unit does look well made.
Nice product review.
Only very amazed by your scope comment of those not being calibrated and such. I'd like to see the real input values when I use a scoop. Taking into account that from certain price points the accuracy gets better.
The accuracy depends a lot on the probes and test setup, sure they are pretty close, but you can get more accurate measurements with other gear sometimes.
@@TheDefpomThanks for your response.
I would have liked to see matters like THD, and Frequency stability, Playback of captured waveforms and such.
When you were checking your Frequency Response - you said 90Mhz and the Generator is only 80Mhz. So if you were right it is actually able to output over its stated range.
Looks like I said something incorrectly, well done for paying attention and noticing it !
Junk-tech? What an attractive brand name!
Tibor Gáts - yes they could have chosen a better brand name.
Yeah, the name is kinda weird to us, but i have a couple of their 90v industrial buck converter all-in-one modules and they are really professionally built! Never miss a beat.
Koolertron also markets this same unit under their brand name
Awesome review
Someone please show me a simple programming procedure, since I cannot figure out how to program it. I just want to generate a sine curve voltage and a rectangular curve voltage in this order.
Hi. How about BNC outputs ground? Are they separated or common ground between channels?
they are always common to the same ground connected to one earth
Well that's not bad at all :-D
Maybe the "sharp" was shape of waveform.
I expected plenty of space inside to keep a couple of good sandwiches, but not as empty as the old blackstar frequency counter ha ha, it passes the space test :-D
A switch mode psu with no heatsink on the drive chip/mosfet, i know it does not need it but my head says eeek! .
No shelding to stop the switchmode emissions upsetting close equipment.
i'm such a moaning sod :-D
What's this? Are you cheating on me with another youtuber?
@@jeffescortlx Err well it was an accident, i didn't mean to two time you, i could not help myself. it's like seeing a pretty woman and well, ok i won't do it again, i promise.
Your videos are the best, honest :-D
@@zx8401ztv it's ok. This video goes into more detail then mine
@@jeffescortlx Well i thought you would be upset, what kind of lover are you ha ha :-D
Don't forget i'm english so im madder than an owl playing a banjo :)
Now that would be interesting to watch :-D
You say "solder" funny don't you?
I bought two of this for my job (5-56 time cheaper then Keiysight). In gneral pretty good, however when I try to drive them synchronously thru single clock when first drive the other I got distortion in pulse wave output.
Additionally the BNC connectors on the back are not properly installed. They appear to short . The plastic mold is properly done just the holes are not properly cut out and the connector is too deep.
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.
Hello my friend, thank you first for your video but I am actually running into a big problem with this device when I updated its firmware from Juntek official website. After updating I received a successful message concerning the update process and after that the device went into a dead mode. No display nor anything else but only the On/Off power button in blue. Any idea on how to fix this problem?
Has any body noticed a whistling noise from the power supply board when the unit is plugged in but turned off (Standby)? And also a fast clicking noise when powering up during the welcome screen?
yes, it seems normal for these units, its a bit annoying.
Hi! I did not find in the description of the device the function of setting the output amplitudes depending on the load resistance. for example High Z mode as in Rigol generators. is there such a possibility in this device?
there is no setting for displaying amplitude units. It always show value for HiZ. When you connect 50 Ohm load, you will need to divide displayed value by 2 to get actual amplitude on the load.
Rubbers on bassakwards? back on front, front on back?
Can you please tell me what what is minimum frequency resolution on the 60 MHz range and how stable is it? For example, can one set it to 60,000,003.027 Hz. I have an application where high frequency accuracy and stability are required. Thanks in advance.
DDS generators are usually not as clean as a proper RF signal generator, so it may not be suitable for your task, however I will fire it up when I get the chance and check the frequency jitter and resolution for you and let you know.
After a signal generator to align valve radios....is this a good 1st one or would u buy an old signal generator?
For alignments you need precision, so I would recommend a dedicated RF signal generator
hi z,, 50 ohm... does it have
SHARP was most likely SHAPE intended
I just got a Juntek PSG9080 and noticed that I cannot change the amplitude with the Ampl. control. I have to change the Offset to get the amplitude to change. Is that normal?
You should be able to change the amplitude independently from the offset
@@TheDefpom Ohhh, I forgot to mention that it was for the DC "waveform". Sorry. Try it, if you don't mind.
@Dimdim DC DOES have amplitude and as I said it can be changed on the PSG9080 with the Offset control. But you can't have BOTH amplitude AND offset. Well, maybe you can, but they would just add together. In any case, I would expect the amplitude control to work for DC.
only vpp or v rms also...
It will be nice device if they used linear power supply, still siglent 2000x in the front,,, thanks for the video.
I ended up accidentally shorting the channel 1 output and the generator will no longer turn on. I tested the power supply and it is still working as expected, beyond that I am unaware of what the issue can be.
Anyone have any advice for troubleshooting?
Doesn't help that all the part numbers are impossible to read
shorting out the output shouldnt kill a function generator... but sounds like maybe the power supply is gone..... late but you would start by measuring the voltage rails
@@rokiedecentra9656 I found an imploded capacitor in the power supply circuit and replaced it. That didn't fix it and I still couldn't identify the issue. As far as I could tell the whole circuit was getting power where it was supposed to, but it was unable to turn on.
@@Bluebirdinhell a bad capacitor usually doesnt kill a circuit but it depends what it was doing, if you made sure all the voltage rails are present then you would start tracing out what is fed first by the power supply. Rarely a bad power supply can take out essential parts of the circuit and at that point it may not be worth fixing
I am shocked. This is supposed to be a test equipment, a signal generator, with protection in place like overcurrent or reverse voltage. Would 50ohm mode help in short circuit case?
The device is good, but after installing the software, an error pops up "Run-Time Error 13. Type mismatch". And not a single review of the device has a word about this problem! The software has not been updated for 8 months, which means Juntec programmers are not looking for a solution to the problem!
Sorry I cannot help either, I haven’t tried any software as I use a Mac.
Have you tried running it as an Administrator, that can solve odd problems sometimes.
@@TheDefpom, Thanks for the advice. I tried running on behalf of the administrator, but the error is the same "Run time error 13". I also think about switching to Mac
Anyone know where to download the firmware, can't find anywhere.
The best I can do is give you the link to the manufacturers page: www.junteks.com/newsitem/278181037
Почему измерения прерывисто (ступеньками)?
Can that device replace my hp rf signal generator?
Definitely not, especially if it is one of the earlier synthesizers from the '70s like the 8640B which is still considered one of the best performing synthesizers in terms of phase noise ever produced.
Junktek? Chinese design/build at American or German instrument prices
Mmm really? More like about 1/5 the price. New Tektronix (made in chyna)
I think that's a bit unfair. I see it as more, try and find me an American or German made piece of test equipment that meets or exceeds the performance at or around the same price(You'd be hard pressed to find even a 10Mhz DDS for this price if it wasn't made in China). Also, most things sold and bought in the U.S are Chinese made anyways. The vast majority of the innerds of electronic/electric devices was probably manufactured in Taiwan or China if you've ever cared to look.
Your note on xx/20 is?
Thank for video.
Erasing chip numbers to avoid being copied... by other Chineses! An external 5V in parallel of the PS is not a good idea. AC voltage between ground is normal between all floating equipment.
P.E.R.F.E.C.T T.H.A.N.K.S A L.O.T ...........