Keysight Technologies E5405A-Pro Series User Manual

Contents

Keysight Technologies E5405A-Pro Series User Manual Manual pdf 71 page image

70 Keysight E5400-Pro Series Soft Touch User’s Guide5 Circuit Board DesignThresholdsE5404A-pro series single-ended soft touch probesData inputsThe threshold can be changed on a “per pod” basis (16 data + 1 clock).This is accomplished using the “user defined threshold” window in thelogic analyzer software.E5405A-pro series differential soft touch probeData inputsIf you are using the E5405A differential soft touch probe to acquiredifferential signals, you would normally allow the logic analyzer todiscriminate between high and low states based on the crossover of thedata and data inputs.You may also use the E5405A differential probe to acquire single-endedsignals. If you are using the E5405A probe to acquire single-ended signals,you should either ground the data inputs or connect them to a dc powersupply. You may:• Ground the data inputs and adjust the threshold in the user interface.Or• Supply a threshold reference voltage to the data inputs. In this case,the threshold in the user interface should be set to zero.If your circuit uses a resistive divider to provide a threshold reference,make sure the thevinen equivalent resistance is around 50 Ω.Clock inputThe same choices exist for the clock input on the E5405A differential probeas outlined above for the data inputs. The clock input has a separate,independent threshold adjustment.E5402A and E5406A-pro series single-ended soft touch probesNOTE The data thresholds can only be changed on a 16-bit per pod basis (16data). All clock thresholds can be changed individually.Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com