Hello i have a Hantek DSO5102P osciliscope 100 mhz, my problem is when i plug in bnc jack from sig gen to channel 1 i get no wave form , but when i connect to channel 2 my waveform shows up hope i didnt cause any damage to channel 1 or is that the way it is? thanks, any help would be appreciated.Both channels have been tested with my multimeter they read good as well.