| Products > Test Equipment |
| RIGOL DP711 and DP712 new 1ch PSU |
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| Eric-H:
Good work! The remaining question is then: how did you calculate the crc over the license data? It the algorithm that Rigol uses known? |
| ElectronMan:
Passed a couple of known good instances of the data with checksum to reveng with instructions to discover/dump CRC parameters; --- Code: ---reveng.exe -w 16 -s 03000008710300000871020000000000000000a111 030000087103000008710000000000000000006776 width=16 poly=0x1021 init=0xebcc refin=false refout=false xorout=0x0000 check=0x6809 residue=0x0000 name=(none) --- End code --- Then pass the parameters back in with instructions to calculate the checksum for the data i want: --- Code: ---reveng -w 16 -p 1021 -i ebcc -c 02000008710200000871020000000000000000 046f --- End code --- And Bob's your uncle :) |
| Eric-H:
I opened my DP711 but could not find the FRAM chip. Is it located at the bottom side of the board? I did see that a smal cap (47 uF / 50V) had vented its electrolite :(, so I will have to replace it. |
| Dwaine:
--- Quote from: Eric-H on March 16, 2017, 07:38:59 am ---I opened my DP711 but could not find the FRAM chip. Is it located at the bottom side of the board? I did see that a smal cap (47 uF / 50V) had vented its electrolite :(, so I will have to replace it. --- End quote --- You are joking right. These power supplies are new. That's warranty for sure Wow. |
| Eric-H:
I did have to break the "Warranty void if removed"-sticker to find the bad cap. :P |
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