Doing the memory upgrade is simple to say the least.
- Digi-Key carries the part 706-1100-ND (digikey number) or IS61LPS51236A-200TQL I. The SRAM is moisture sensitive so follow the instructions and install before the expiry date or you will have to bake it. Don't open the sealed package until you are ready.
- My board was a little corroded so I used a fine brass brush and alcohol to clean up the pads.
- I happen to have a IR rework station with a preheated so I used lead based solder paste and preheated to around 180 and the board was 13mm off the surface of the preheater. Top of board ended up at around 160. Actual time under IR was about 6 seconds. I did screw up (too much solder) with the solder application and has to clean it off and reapply (this happened before soldering). I also ended up with a small solderball between a couple pins. Had I not checked it could have been an issue.
- If you have the case open check the front panel (flat flex) cables running to the main board. They where physically touching the underside of the power pcb and needed to be taped down.
- Software, I had a quick look at the Atten site and decided to load the Siglent firmware in a matter of minutes. Atten has no listed updates so I just couldn't be bothered. You can find a link to the software I installed here
http://siglent.freeforums.org/new-fw-for-sds1000cml-and-cnl-t77.html I used FW 5.01.02.22 CML. You need to install the firmware, then cfg file and then run a calibration sequence or there will probably be trouble of some sort. I rebooted after each step. Read the firmware post stuff it's informative.
- I'm not sure if the ram is tested on boot, I just recorded a long signal and wandered through it looking for anything nasty.
First pic is how not to apply solder, next are clean pads, last is a solder ball on a scalpel.