Products > Test Equipment
RPL1116 (MSO1000Z) and PLA2216 (MSO5000) Active Logic Probe teardown
Vtech:
Here are some photos of RPL1116 Active Logic Probe pod used in MSO1000Z series scope.
Scope has 16 channel logic probe. The probe pod uses 8x LMH7322 (Dual 700ps High Speed Comparator with RSPECL Outputs). 4 comparators on each side. The pod is connected to the scope using 68 pin connector and flat cable. Reference voltage is generated inside the scope.
Cable connector has:
16x2 pins for PECL signals,
22x GND between diff pairs + some extra,
6 pins for VCC
2x2 pins for +/- supply voltage
Some 4 more signals (reference voltage??)
Most likely, the same design is used in new pod for MSO5000 series - PLA2216 Active logic probe. Here are some x-rays of the new pod: https://www.eevblog.com/forum/testgear/hacking-the-rigol-mso5000-series-oscilloscopes/msg2055715/#msg2055715
wulfman:
get me some dimensions and i can reproduce the board for everybody.
If i make some preliminary schematics, maybe you can fill in the blanks with a ohm meter ?
oliv3r:
Here's some links to the PLA2216 X-Ray's. Attached is the close-up from the second link :)
https://www.eevblog.com/forum/testgear/hacking-the-rigol-mso5000-series-oscilloscopes/msg2055715/#msg2055715
https://www.eevblog.com/forum/testgear/hacking-the-rigol-mso5000-series-oscilloscopes/msg2055778/#msg2055778
https://www.eevblog.com/forum/testgear/hacking-the-rigol-mso5000-series-oscilloscopes/msg2057401/#msg2057401
So I reccon to rename the topic to add the PLA2216 for the MSO[5789]000 series :)
Was looking at pricing of the LMH73222's and TI says they are 4.35 USD per 1 Ku! :o
Digikey had them for 8 something a piece!
So with the need of 8, that's 35 to 65 USD! just for the chips
TK:
--- Quote from: oliv3r on January 02, 2019, 06:41:56 pm ---Was looking at pricing of the LMH73222's and TI says they are 4.35 USD per 1 Ku! :o
Digikey had them for 8 something a piece!
So with the need of 8, that's 35 to 65 USD! just for the chips
--- End quote ---
You can use 4 LMH7324 instead and save some $$
TopLoser:
--- Quote from: Mechatrommer on January 02, 2019, 06:44:57 pm ---i think it will be useless without the LA daughter board inside, thats where the dso recognize the LA existant, or am i missing something on the newer rigol model?
--- End quote ---
The board just contains the comparators, scope is ready and waiting for the digital outputs from the comparators and outputs threshold voltages for the comparators as selected on the scope. I think there’s an input to be pulled low to indicate to the scope that the pod is plugged in. That’s certainly the case with the 5000 series and this looks exactly the same but different pinout and connector.
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