Products > Test Equipment
Siglent SPD3303D review
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ducatistou:
I made an other test :

I put the Siglent PSU near and very close to the RTL dongle and computer and surprisingly i noticed no interferences ! The dongle is shielded in a little PCB box

I put back the PSU in the shack far from tuner and interferences went back thru antenna and/or coax i suppose

Unfortunatly ... i use the PSU in the shack not in the radio room, then i can't power the LNA with the Siglent !!  :--
FrankBuss:
Looks like it is related to how near it is to the antenna. But is there a reason why you are using a EUR 300 lab power supply to power a LNA? There are much cheaper linear power supplies without any microcontroller.
ducatistou:
 ;) thank goodness, it's not for the LNA ! But as it is on for my electronics projects and hacks it could do so ... but not. One of my old free homemade power does obviously better ... :-+ and i have to switch it off when i'm listening SDR. I like this PSU for what it can do, design and accuracy, but as you say for $300 i didn't expect such annoying issue in HF domain, hope it will not interfere in my next radio projects
ducatistou:
Here is the Siglent's engineer answer :

"Hi Eric,
I don’t know much about the RF perturbations, So I cannot understand it well.
One explanation is because there is a feedback circuit which produces crosstalk while you opened the output channels.
If you have any doubt, please feedback."

 ???
artelse:
Hi,

Have been on the lookout for a new PSU and this Siglent catched my eye. What I am wondering about, is there a real benefit to have an LCD screen on the device instead of just a nice LED panel like on the SPD3301C version?

Thanks!
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