I have an Old 54610B works good other than when you try to change v/div or time base it kinda jumps around only on channel one channel two works much better and of course the time base on both. But do u think this just encoders just want to make sure theres not some commonly known problem before i dive into into it. Auto Scale works perfectly v/div on channel two works great. Just time base and Channel 1 v/div. Any help would be much appreciated I really like the old scopes serves me well working on radios and amps. It was even calibrated in 2016 lol.