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Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)

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Mechatrommer:
this huber suhner looks much neater without that panel mounting protrusion, but more than double the price... consider shipping cost from china which one is cheaper..
https://www.ebay.com/itm/HUBER-SUHNER-22645644-33BMA-SMA50-1-199-UE-New/122016004771?hash=item1c68b87aa3:g:-3UAAOSwM5JZplW0

since you posted it, this is inside of LPA-BNC (i cant remember if i've posted it somewhere)...
[image refer attachment #1]

although my measurement setup can be questioned (due to difficulty to mate BNC converter to my N or SMA port connector during SOLT calibration and... the VNA used is not HP/Agilent) but fwiw, this is its S11 return loss and |Z|...
[image refer attachment #2]
[image refer attachment #3]
[image refer attachment #4]

the original LPA-BNC and the above LPA-SMA is solid metal end to end, quite hard finding the right material to diy, but i've made the pigtail type diy... BMA-BNC S11 return loss and |Z| (comparison with blue trace as control measurement, ie no diy-BMA adapter in between of coax cable (Huber-Suhner) and snapped together terminator+to BNC adapters.)...
[image refer attachment #5]
[image refer attachment #6]
[image refer attachment #7]
[image refer attachment #8]

i dont have original LPA-SMA and am not intending to get one, $250 for just some plastics and metals is just wow, so i just get one LPA-BNC (which has extra 6 pins female interface at the front), just to see whats inside it, ie BMA/BNC adapter and  the 6 pins connection, and to get the mechanical dimensions... they just both direct connection without any special component inside, yeah those all are for $250 the cheapest (used) i can find in ebay that time. btw this is diy BMA-SMA S11 return loss and |Z|. (i forgot to make control measurement)...
[image refer attachment #9]
[image refer attachment #10]
[image refer attachment #11]

the measurement was made feb last year. the BNC and SMA connectors used are from cheap China (direct connection/soldered to RG174 cable) but the BMA male (originally BMA-BMA pigtail cutted to half) and female-BMA to female-SMA adapter came all the way from USA, Tensolite brand, fwiw...

BeckGyver:
Thanks for all this info on the BNC type. I got the SMA adapter on cheap and knew already that it would be mostly very expensive air, but was to curios to open it myself.

I see the case you printed for the adapter and it would be very great to get the these cases done for me as well. As I lack a 3D printer, I think I will have to order them somwhere. Can you share the source for the cases ?

I have found several sources for the adapters on E-Bay as well, but was not sure if they fit properly. For just testing it 100$ plus import duty is a bit over. Maybe someon can use the links better than me, just search for the items:
324044159816  https://www.ebay.de/itm/RF-Connector-Adapter-1-Pc-M-A-COM-AMP-BMA-Plug-m-to-SMA-m-50-Ohm-18-GHz-NEW/324044159816
312540391224  https://www.ebay.de/itm/Lot-of-10-AMP-222699-1-Connector-Adapter-SMA-Jack-to-3-5mm-BMA-Plug/312540391224

I have a Tektronix Y400 with both YBA250 and YBT250 modules in calibrated state, I will have a run if I can find them in all the Boxes. 

Mechatrommer:

--- Quote from: BeckGyver on September 11, 2020, 07:52:39 pm ---https://www.ebay.de/itm/Lot-of-10-AMP-222699-1-Connector-Adapter-SMA-Jack-to-3-5mm-BMA-Plug/312540391224

--- End quote ---
be careful, by the look of it, its different from BMA used here. about the casing, its still unfinished business (as many others projects), i havent corrected the dimensions for proper mating to each other, and now i have resin 3d printer which is much better resolution and tolerance. next plan is to print with it, but since the casing was dimensioned to my fdm machine, i'll need to do major overhaul to it to print nicely with higher res resin type. btw we are wandering off topic i was dragged. this is motherboard upgrade thread, maybe we can post in more proper thread like this... https://www.eevblog.com/forum/projects/lecroy-connectors/msg2167048/#msg2167048

and i just found internal picture of my diy BMA-BNC somewhere buried in this forum (below)... got dragged again :P

georgo:
Hi,

I reconstructed the PCB made by wldshy. (cause I couldn't find the gerbers and i got no response when asking for it)

It is a small adapter board to interface HDMI to the NEC TFT-Display found in the WavePro 7k/SDA 3010/DDA 3000.

It is currently untested!!! (Rev. A) - I just send the board off to the pcb manifacturer and I will keep you updated if it is working

You can find the KiCad-Design here: https://github.com/ottingerg/sii151

lukier:

--- Quote from: georgo on September 22, 2020, 01:41:16 pm ---Hi,

I reconstructed the PCB made by wldshy. (cause I couldn't find the gerbers and i got no response when asking for it)

It is a small adapter board to interface HDMI to the NEC TFT-Display found in the WavePro 7k/SDA 3010/DDA 3000.

It is currently untested!!! (Rev. A) - I just send the board off to the pcb manifacturer and I will keep you updated if it is working (Attachment Link)

You can find the KiCad-Design here: https://github.com/ottingerg/sii151

--- End quote ---

Is it something like that?
https://uk.farnell.com/midas/mcib-14/interface-board-hdmi-to-lvds/dp/2606863

I've used this board when I was modding WaveRunner 6100A, as the motherboard I've had to settle on didn't have LVDS output.

Fortunately, now with DDA-3000A I use Advantech with LVDS so new XGA panel has direct connection to it.

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