Products > Test Equipment

JunTek PSG9080 Programmable Signal Generator (80 MHz - 300 MSa/s - 14-bit)

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masterx81:
Interesting device, but i really not like the r-2r DAC  |O

radiolistener:

--- Quote from: grumss on November 24, 2020, 09:19:17 am ---Anyway i have only had it a week or so, im not going to open it up and fix it unless i have to..

--- End quote ---

You can open and check the PCB. May be there is some flux or solder.
There are just 4 screws and no seal labels.

gwideman:
In case  it's of interest to readers: 

There's a Koolertron CJDS98 which appears to be the same as this Juntek 9080.

If you download the zip file software and docs package pointed to by the Koolertron vendor on amazon.com, it contains a manual titled PSG9080, and showing a picture of the Juntek.

Of course "same" is relative, as there could well be hardware and firmware variations.

gwideman:

--- Quote from: mawyatt on September 17, 2020, 01:54:01 pm ---
--- Quote from: radiolistener on September 17, 2020, 12:53:47 pm ---It has external power supply connector 5V 3A, so it can be powered from external linear power supply. External power supply can improve performance.


--- End quote ---

That's an interesting feature, one could power this from an external battery pack for portable use, however I doubt that an external PS will improved the output signal quality, easy enough to verify tho.

Best,

--- End quote ---

A significant merit of running it from battery would be to completely avoid ground loops, or the necessity to provide some current path from the sig gen ground to mains earth to avoid half-mains-voltage appearing on the BNCs (albeit at high impedance), as others have discussed.

It's of at least some note that the power supply strategy has changed between the older FY9600/9700 design. Those older ones had a power supply board that produced +/-13.5V and +5V, which were a bit of a pain to replace (see SDG Electronics YouTube series, if interested). 

But this Juntech PSG 9080 has the main PSU board responsible only for providing, one assumes, 5V (thus facilitating the external 5V supply feature), and the other needed voltages are generated on the main DDS+amplifier board.  So that would make replacement of the internal PSU board pretty easy, for those who might want to do that.

Graham

radiolistener:
yes, you can use USB power bank to power it.
But note it consume about 0.7 A for low voltage output and up to 2 A for 20 Vpp output

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