Products > Test Equipment
Someone has hacked MDO4000C?
darkstar49:
--- Quote from: analogRF on February 08, 2021, 03:10:43 pm ---did you get it to work properly at 1GHz?
or did you go back to 200MHz?
--- End quote ---
Nope, experiments planned later today... hopefully getting back the cal data for 200MHz. But I'm relatively confident, the firmware shows that there are different (calibration) data sets for the different BW's (0, 1, 2, 3 indexes into some table).
So the mentioned problem is likely to happen for all non-native BW settings. Will report on that.
analogRF:
--- Quote from: darkstar49 on February 09, 2021, 10:53:50 am ---
--- Quote from: analogRF on February 08, 2021, 03:10:43 pm ---did you get it to work properly at 1GHz?
or did you go back to 200MHz?
--- End quote ---
Nope, experiments planned later today... hopefully getting back the cal data for 200MHz. But I'm relatively confident, the firmware shows that there are different (calibration) data sets for the different BW's (0, 1, 2, 3 indexes into some table).
So the mentioned problem is likely to happen for all non-native BW settings. Will report on that.
--- End quote ---
darkstar49,
did you try other BW like 500MHz for example instead of 1GHz?
look what I just found on ebay (see the pic) :o :o
it says model (from resistors) is 1 :o
so perhaps some resistor IDs must be moved around in order for the BW upgrade to work!
i dont know how that seller got this image, he must have enabled an engineering debug mode
I dont think the instrument by default would give you this information,
EDIT: changing those ID resistors (wherever they are) is probably what Tek does when you send it for BW upgrade. Plus of course calibration
I dont think they replace the board.
Howardlong:
--- Quote from: analogRF on February 13, 2021, 09:14:57 pm ---
--- Quote from: darkstar49 on February 09, 2021, 10:53:50 am ---
--- Quote from: analogRF on February 08, 2021, 03:10:43 pm ---did you get it to work properly at 1GHz?
or did you go back to 200MHz?
--- End quote ---
Nope, experiments planned later today... hopefully getting back the cal data for 200MHz. But I'm relatively confident, the firmware shows that there are different (calibration) data sets for the different BW's (0, 1, 2, 3 indexes into some table).
So the mentioned problem is likely to happen for all non-native BW settings. Will report on that.
--- End quote ---
darkstar49,
did you try other BW like 500MHz for example instead of 1GHz?
look what I just found on ebay (see the pic) :o :o
it says model (from resistors) is 1 :o
so perhaps some resistor IDs must be moved around in order for the BW upgrade to work!
i dont know how that seller got this image, he must have enabled an engineering debug mode
I dont think the instrument by default would give you this information,
EDIT: changing those ID resistors (wherever they are) is probably what Tek does when you send it for BW upgrade. Plus of course calibration
I dont think they replace the board.
--- End quote ---
FWIW this is mine, a 1GHz liberated MDO4054C-SA6
You get the image in either Manufacturing Mode (:MFG:MOD 1) or Development Mode (:DEV:MOD 1). For Manufacturing mode there is a different password see post #71 https://www.eevblog.com/forum/testgear/mdo3000-hacking/msg769821/#msg769821
FWIW, I've noticed that any residual channel offsets disappear when the channel is bandwidth limited to 250 or 20MHz.
.
analogRF:
--- Quote from: Howardlong on February 14, 2021, 05:58:54 pm ---
FWIW this is mine, a 1GHz liberated MDO4054C-SA6
You get the image in either Manufacturing Mode (:MFG:MOD 1) or Development Mode (:DEV:MOD 1). For Manufacturing mode there is a different password see post #71 https://www.eevblog.com/forum/testgear/mdo3000-hacking/msg769821/#msg769821
FWIW, I've noticed that any residual channel offsets disappear when the channel is bandwidth limited to 250 or 20MHz.
(Attachment Link) .
--- End quote ---
ummm...this one also shows model number based on resistors is 1 but says 500MHz. Now I am lost...
but still it shows there have to be some ID resistors on the board to play with
I dont have a MDO4000, so are there any high res pictures of top and bottom of the main board somewhere? or can somebody provide some pictures?
analogRF:
Howardlong,
in post #9 of this thread, an MDO4034B was upgraded to 1GHz and it seems to be working fine with no warning message or DC offset
have you contacted that forum member? B versions did not even have an official BW upgrade like C versions do
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