Received DM9000 yesterday, replaced broken one. Today, doublechecking, fitted LA board in place. Now Ethernet is working too.
Finally the hardware of my MSO is complete.
that's good news
Thanks again Tinhead. A small token of gratitude is underway by 'snailmail'.
you welcome ... "gratitude " ? huh, whatever it is, thank you!
While checking my soldering I found some minor differences with the LA board schematic, I made the following handcorrections in my printout:
DM9000 pin 60 SPEED# routes to pin 51 of J20 P2, E-ACT
DM9000 pin 62 LINK_ACT# routes to pin 52 of J20 P2, E-LINK
DM9000 pin 90 DvDD routes to +3.3D
DM9000 pin 91 IO16 is unconnected
A 0 Ohm R marked R27 (topside) in route LA_CLK25, can be used as testpoint for clock signal to DM9000.
yeah, the 60/62 i've sa them mirrored and 90/91 is clear schematic error. Changed in my version
as well, not changed the opsted one as i will anyway repost with all pages.
If you have your USB terminal connection open during self calibration you will notice a message when it is ready:
"mv: can't rename '/autochk.tmp' : No such file or directory". An artefact of some form of factory calibration?
i know, there are many other hidden things like :
/soft2.mov - use for dithering calculation i think
/linear_adc - whihc have something to do with cal as well
/chk_base_volt - which is necessary as well, but no idea how the values will be created (it is unique for each device)
/soft1.mov - no idea as well,
/phase.mdy - ditto (where i hink it can be used to change allign phase between ADCs?)
/param/adc_off - as well to modify ADC settings, we know some params already but hell, how to use it?
/ubdb.swi - necessary during update, but why?
So yeah, there is a lot of "work" to do, to recognize them all (i will not spend any time on this anymore, but maybe someone else?)
For sure Hantek/Tekway will not tell us anything about them, which of course make sense as we don't need to know internal things.
It is however really nice to see how much effort they spend to integrate testing routines into fw. This was already the case in
their first DSO, the Tekway DST1000(A) series.