yesterday I got my used Lecroy9400 scope. Unfortunately the second channel is broken. A signal in the second channl eg. a sine wave looks like as if there where only two or three quantization steps.
When I turn up the signals offset, the signal becomes clearly and continious in the upper quarter of the screen. On the rest of the screen the signal loks as mentioned above.
Inmy opinion there might be something wrong with the ADC. Does anybody have an idea or maybe a service manual. Is it possible to perform a selftest? ??