...and yes, my DSA815-TG is about 2 years old, used an older version of boot-loader and maybe an older hw revison, who make it possible for me to downgrade again. I have paid for the both parts of vSWR-Option. All other are not required for me as now. I know that's able to unlock all option with the keygen and i also had read the hole thread around the decryption of the entire rigols 2k,4k Scope and older DSA8x anaylzer and was amazed about the knowledge of the programmer who has analyzed, identified and offer the used cipher algorythm. I don't was further surprised that he was later able to write the keygen for that. I had expect that the owner of this eevblog stop the thread if the details of internal cipher method was published because it's not allowed to do this in every country. Themost companies are very sensitive about this kind of issues, even it's a chinese one. That they had noticed, that a keygen is available and reduces their "option business", confirms the modification of the bootloader that stop the downgrade and the further usage of the keygen in later offered firmware releases and newer and higher priced scope and analyzer models that released in the near past.
I actually uses a DSA815TG with the hole VSWR-Option and the advanced messuring Kit that's helpful for th two-tone messurements. The EMI option is actually not required - even i homebrew and repair some of my rf equipments.
I am active on the HF-Bands (mostly doing morese code and using less the microphone), The Satellite operation and all multimode UHF and VHF and SHF radios are sold in the past because i don't use them. The last one is the D-Star radio ic2820h Icom is also boxed again like the homebrewed FM-ATV transmitter since a couple of years. All antennas expect the Diamond X30 are removed because i am not further interessed operate on frequencies upper that 50Mhz. I had done this in the late 80th to 2001 and there is nothing that i wanna do as now.
I had moved my homebrew activities from VHF and upper to HF and lower and do design and programming a modern rotor controller using a 5" TFT-Display and an ARM Cortex M4F. I am not sure if this will be ever published because i see the hole (time consuming) message traffice of K3NG's published one. Most of them had never seen a IDE and would build and customize them. The questions are very basic and could answered by just reading the fucking manual of the stupid arduino manual's. The IDE i use for the ARM-Cortex-M are quite more comlex and powerful - the manual are bigger and more detailed. To publish a source code of such project enters into a nightmare of questions like them from the arduino example of K3NG. I don't want to waste my less getting time to do such. I wanna do working on my radio instead. Actually i rebuild the kitchen with my wife - also a time consuming job that needs to be done quite fast and does'nt required any Rigol's but more tools from Bosch, Makita and Festool. I get retired if this is (ever) finished :-)
vy 73 de Gerhard, DD4DA