Near field measurements are great for identifying areas of concerns on a board and repeatably testing those points but they are not a replacement to far field measurements.
It is a simpler and less expensive design and works with most of the signals we use on a daily basis. There are certainly differential probes or scopes that can be purchased but they tend to be more expensive. We find most customers prefer less expensive ground referenced options.
so it is simpler for the manufacturer but not for the user? the user have to afford another budget for making floating measurement. i mean probes differential ground referenced measurement is not easier for the user ,may cause damage to the equipment (oscope) and may cause injury too so it is a matter of manufacturer interest over the user customer
There are plenty of floating oscilloscopes for customers who need that capability. RIGOL doesn't produce any, but if that is what you need then they can be a great investment. It is something we look at in our product efforts, but as I said we find demand to be fairly small for this capability.
How close are these measurements to a far field test?
Near field measurements are great for identifying areas of concerns on a board and repeatably testing those points but they are not a replacement to far field measurements.
why mostly all Oscope manufacturers make channels ground referenced ?
It is a simpler and less expensive design and works with most of the signals we use on a daily basis. There are certainly differential probes or scopes that can be purchased but they tend to be more expensive. We find most customers prefer less expensive ground referenced options.
so it is simpler for the manufacturer but not for the user?
the user have to afford another budget for making floating measurement. i mean probes differential
ground referenced measurement is not easier for the user ,may cause damage to the equipment (oscope) and may cause injury too
so it is a matter of manufacturer interest over the user customer
There are plenty of floating oscilloscopes for customers who need that capability. RIGOL doesn't produce any, but if that is what you need then they can be a great investment. It is something we look at in our product efforts, but as I said we find demand to be fairly small for this capability.