I am working for the calibration department at my company. We have a Tektronix MSO 4104B that we have calibrated. All of the points have come within the Tektronix specifications with the exception of one of the digital probes. The specifications show the voltage should be between 3.78V and 4.22 V and the digital probe is measuring 3.69 V. What are the options for adjustment? I have scanned through the manual and cannot find an internal adjustment to get that probe to come into tolerance. What are my options to get that digital probe back into tolerance? It is channel 8 of the digital logic probes that come with the unit.