After the findings of the effect of H/W configurations in the DHO800/900 thread, I thought I'ld have a closer look at the DHO1000 hardware configuration - albeit, as I can preemptively already report -- with little further success, but at least with some knowledge gain...
Since there are no "rear side" photos of the DHO1000 PCB available yet, I took some and added them to this post. There are four resistors that apparently code the H/W version in a binary manner. I hoped for a possibility that the configured H/W may affect the function of the 50 Ohms input relays, but I had to find out it doesn't. Instead, when I changed my H/W version from originally 2 to 0, I wouldn't get a trace on the screen anymore. The scope shows its trigger status as Auto / Run but no trace whatsoever on any channel. Obviously, I returned the configuration back to 2.
Another interesting detail is that the parts not populated on the 1000 vs. the 4000 variety of Rigol's scope are not only limited to the "accessible" side of the PCB, but there's also a lot of stuff missing on the "rear" in the second ADC's vicinity.
Moreover, I found it very difficult to remove the H/W config resistor (10kOhm) -- even 400C hot air for a considerable time and a decent flow rate wouldn't do the trick for me, and I didn't want to go any hotter. It seems there's so much copper planes in the inner layers of the PCB that it conducts the heat away very quickly, and the lead-free solder also doesn't help to ease things up. Finally, I used the "iron" to work on the config R which turned out okay. But this shows that a "serious" modification (i.e. adding the missing ADC, PSU and decoupling stuff) woud require really decent SMD rework tools -- a simple hot air station probably won't be enough unless one would be going high-risk...
Some more details / findings, yet not documented in photos:
- The metalwork of the scope provides orifices for one more USB host, two BNCs next to them and then a place for Rigol's passive logic (MSO) probe connector. There are no such counterparts prepared in the plastic front.
- There are provisions for three more pushbuttons (even equipped with LEDs already) above the "Math" button.
- I found the input BNCs not to be fixed to the front metalwork with nuts (on my specimen). This eliminates the need to remove the whole chassis from the plastic front when removing the PCB, but puts all stress on the PCB when attaching/removing probe connectors. The heat sink with its many screws supports that area pretty well but I'll still remember to be more carefull when I attach a probe with a massive compensation box like Tek's P6015... I'm not sure if it's the same for the DHO4000 with it's additional probe detect/power PCB where bigger probes are expected to be attached.
So unfortunately, no progress with a "Hack", but at least some information gained...
Cheers