Transistor matching

After the carrier block has finished, it's time to match the transistors.

I have built a simple curve tracer from Elektor Electronics (Feb. 2009).

More info about this Transistor Curve Tracer,

http://www.elektor-electronics.co.uk/magazines/2009/february/transistor-curve-tracer.810360.lynkx


And this is mine.




A sample screenshot of a typical 2SJ49 mosfet,

Keypad fixed

After some cleaning of the keypad assembly, the non working key is now back to service. :-)




This is the keypad PCB.

Yet another new instrument

I'm really happy to welcome another new member to my measurement team. It's an HP 3561A dynamic signal analyzer.

Again, the unit itself is in great condition and function properly. The only defect is one key not being responsive which I think is pretty easy to fix.



The 3561A could accept a signal up to 100kHz and perform usual FFT, gain-phase plot, noise density measurement and a lot more.

Time to read the 200+ page manual now. :-)

Jitter?

My new toy has arrived, it's an HP (Agilent) analyzer which is used for measuring jitter in the time domain. Luckily, the unit is in perfect condition and works like charm.

HP calls it "Modulation Domain Analyzer". You can learn more about it here.




Now I'm busy reading the manual and will start some clock test soon.