Tektronix, Inc. P6240, User Manual

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TLS 216 User Manual
3–53
Doing a Signal Path Compensation
The TLS 216 Logic Scope allows you to compensate the internal signal path
used to acquire the waveforms you measure. This article details the procedure for
executing a signal path compensation (SPC) which optimizes the capability of
the logic scope to make accurate measurements based on the ambient tempera-
ture.
NOTE . Run an SPC anytime you wish to ensure that measurements you take are
made with the best accuracy possible. You should also run SPC if the tempera-
ture has changed more than 5
_
C since the last SPC was performed.
To Run SPC
To signal-path compensate the logic scope:
1. Power on the logic scope and allow a 20-minute warm-up before doing this
procedure.
2. Disconnect any input signals you may have connected from all input
channels.
CAUTION.
When doing steps 3 and 4, do not turn off the logic scope until
signal-path compensation completes. If you interrupt (or lose) power to the
instrument while signal-path compensation is running, the logic scope logs a
message in its error log. If such a case occurs, rerun signal-path compensation.
3. Press SHIFT UTILITY
➞
System (main)
➞
Cal (pop-up)
➞
Signal Path
(main)
➞
OK Compensate Signal Paths (side).
4. Wait for signal path compensation to complete (about 16 minutes). While it
progresses, a “clock” icon (shown at left) is displayed on-screen. When
compensation completes, the status message updates to Pass or Fail in the
main menu.
5. Verify the word Pass appears under Signal Path in the main menu. (See
Figure 3-25.)