5TB Seagate Barracuda ST5000LM000 2.5″ Internal Hard Drive

Posted by Geir on July 16, 2019
Posted in: Computers. Leave a Comment

I just want to share my experience with the 5TB Seagate Barracuda ST5000LM000 2.5″ Internal Hard Drive.
I am not going to share my own thoughts about this drive her in public.
Instead I will leave it up to you! to do your own judgement.
Back in February 2019 I bought 10 of these drives for stationary use.
After 2 to 3 months, two of these failed totally.
Then in May, I bought one more from a different supplier. Well, this last one lasted for one and a half month.
To summarize; three out of eleven drives failed within three months of use.
I have never seen anything like it before.

UPDATE 2019.09.07. One more drive failed this morning. But at least this one lasted about six months.

Testing the Siglent SVA1015X

Posted by Geir on October 25, 2018
Posted in: Equipment. Tagged: , , , . Leave a Comment

Testing the Siglent SVA1015X

Been playing a bit with the SVA1015X today.
Here are some snap shots.

Noise floor @ 10MHz, preamp off

 

Noise floor @ 10MHz, preamp on

 

Measuring Rohde & Schwarz SMT02 Phase Noise @ 15MHz

 

Measuring my 10MHz GPS disciplined oscillator Phase Noise.

 

Measuring SAV1015X internal osc Phase Noise.

 

Next pixs; testing one of theese, terminated into a 51 Ohm resistor with the VNA function.

 

Banana to BNC adapter. VSWR: 10MHz to 1.5GHz

 

Banana to BNC adapter.
Smith chart: 10MHz to 1.5GHz