Measuring Waveforms
3–150
TDS 500D, TDS 600B, & TDS 700D User Manual
NOTE. If you select Manual, some controls are automatically adjusted; if you
select Auto, a complete Autoset is performed. Also, if a user mask is active,
Autoset adjusts the selected trace to match the last standard mask selected, if
possible.
To control whether an autoset is performed when a standard mask is selected,
press MEASURE ➞ Measure (main) ➞ Masks (pop-up) ➞ Mask Op-
tions (main). Then toggle Std Mask Autoset (side) to Auto or Manual.
NOTE. If you select OFF, offset is not adjusted when the DS–0, E1, E2, E3, or
T1.102 standards are selected.
To control whether a standard-mask autoset can adjust Vertical Offset to match
the waveform to the mask, press MEASURE ➞ Measure (main) ➞ Masks
(pop-up) ➞ Mask Options (main). Then toggle Std Mask Offset Adj (side) to
ON or OFF.
To enable the optical reference receiver (option 3C and 4C), which is required by
some optical standards that require a Bessel-Thompson response, press MEA-
SURE ➞ Measure (main) ➞ Masks (pop-up) ➞ Mask Options (main). Then
toggle Filter (side) to Enable. The Filter menu is not available on a TDS 794D.
To determine the calibration status of the communication filter, press SHIFT ➞
UTILITY ➞ System (main) ➞ Cal (pop-up). Then read the calibration status
from the Comm Filter menu. If the status is not Pass, refer the oscilloscope to
service personnel for repair or adjustment. The oscilloscope determines the status
at power-up.
To manually align the waveform to a mask, press MEASURE ➞ Mea-
sure (main) ➞ Masks (pop-up) ➞ Time Base Position (main) ➞ Time Base
Position (side) and adjust the general purpose knob or the key pad.
To reset the time base position to 0 s, press MEASURE ➞ Measure (main) ➞
Masks (pop-up) ➞ Time Base Position (main) ➞ Set to 0 s (side).
Adjusting Time Base
Position
To Next Page
Loading...
Need help?
General
