strange but on our site they write that the channels are isolated. I was told that it can be bought for $ 2170 But it is refurbished.
Dear Arthur, The TPS2000 series you show in Russian (in your reply #225 above) as having isolated channels is correct. And its refurbished price for $ 2170 may sound as acceptable. However, please notice that in your reply #214 https://www.overunityresearch.com/index.php?topic=3933.msg94832#msg94832 your attached picture refers to a TDS2024C type i.e. a member of the TDS 2000 series, ok? And the TDS 2000 series was not made with isolated inputs. You can see a tear down video on it here https://www.youtube.com/watch?v=3K04bHJJQQA and the guy actually disassembles the 200 MHz oscilloscope. I attached a snapshot picture from video time around 20:06 where the common metal frame for the ground screws of the BNC input connectors is clearly seen. This means that the 4 inputs cannot be isolated from each other by their ground connections which is surely not the case for the TPS 2000 series. If you could ask the seller / sales staff to check the conductivity between the grounds of the BNC connectors by a simple Ohm meter in the front side of their TDS2024C, the meter would show a short circuit between any of the BNC outer connections. One more thing: there are other manufacturers which have insulated input 4 channel oscilloscopes, here are some types: https://uk.farnell.com/c/test-measurement/oscilloscopes?scope-channels=4-channel-isolated But I understand if you insist on Tektronix of course. It is good that the email issue has been clarified. Gyula
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