Hi all,
received the new Hantek 6254BD last saturday, ordered at Aliexpress.
Unfortunately the device is not useable at all. There is constant background noise
on all channels shown and can be measured. Does not matter if the input connector
is completely open or directly grounded with an BNC connector.
Did the self-calibration routine several times - no change.
open input, setting at 20mV shows 17.6mVolt background noise
open input, setting at 500mV shows 31.4mVolt background noise
open input, setting at 5V shows 314mVolt background noise
Connected the scope with the probe to the probe compensation connector,
(probe was set to 1:10) shows the noise in the squarewave too. See pictures attached!
Is this a design problem or is the unit faulty ? (OK, OK, or some would say: "it's a toy...")
greetings
wolderl