CS548 problems after firmware upgrade

Hello,
I have got some problems after upgrading the firmware to 7769 / 7770:
* Channel A shows some random HF noise with 12V peak;
* Channel D is forcibly off (red LED) with values frozen and does not react to controls.
The behavior is the same with and without probes connected. Channels B and C seem to work normally.
Attaching a screenshot showing the noise on ChA and values stuck on ChD.
CS548 S/N JV10170, originally was 7648

Rolling back to 7669 solves the issue seemingly, but I am still looking forward to have 500 MSPS acquisition rate.

Hello, I have got some problems after upgrading the firmware to 7769 / 7770: * Channel A shows some random HF noise with 12V peak; * Channel D is forcibly off (red LED) with values frozen and does not react to controls. The behavior is the same with and without probes connected. Channels B and C seem to work normally. Attaching a screenshot showing the noise on ChA and values stuck on ChD. CS548 S/N JV10170, originally was 7648 Rolling back to 7669 solves the issue seemingly, but I am still looking forward to have 500 MSPS acquisition rate.

Unfortunately this is a tricky one. Our first ADC, made by Intersil, samples fine at 500 MSPS. However, it wants to do that with 3 serial lanes coming out. The data sheet did say operation with 2 lanes in packed form would also work, so that's what we went for. Most of the ADC we have tried (all the ones here for example), work just fine. But there are some that don't. It seems to be a problem of the transceiver.

We changed to an Analog Devices ADC just after Covid, and it has no problems working at 500 MSPS on two lanes (that is what it is designed to do).

We will revisit this to see if there is anything more we can do. But for the moment, the fallback is 76xx, as you have done. In your case, one of the ADC's is problematic, while 3 are fine. I agree this is annoying.

Unfortunately this is a tricky one. Our first ADC, made by Intersil, samples fine at 500 MSPS. However, it wants to do that with 3 serial lanes coming out. The data sheet did say operation with 2 lanes in packed form would also work, so that's what we went for. Most of the ADC we have tried (all the ones here for example), work just fine. But there are some that don't. It seems to be a problem of the transceiver. We changed to an Analog Devices ADC just after Covid, and it has no problems working at 500 MSPS on two lanes (that is what it is designed to do). We will revisit this to see if there is anything more we can do. But for the moment, the fallback is 76xx, as you have done. In your case, one of the ADC's is problematic, while 3 are fine. I agree this is annoying.