Tektronix 11A32 User's Reference Manual page 51

Operating the 11A32 in 11300-series mainframes
4. The mainframe can automatically measure the selected trace. Automatic
measurements of the selected trace can be initiated by pressing a probe ID
button. The Automatic Measurements feature can be enabled or disabled
using the Probe ID Utility menu. Such measurements are peak-to-peak,
maximum, middle, and minimum voltages; frequency, period, pulse width,
and duty cycle. For full information about automatic measurements, see
Measure in the 11301 and 11302 User Reference manual, or the 11301A and
11302A User Reference Manual
5. An interrupt to the GPIB and RS-232-C can be generated. Pressing a
probe ID button will cause the mainframe to produce an SRQ to the GPIB
and RS-232-C. For more information, refer to the GP1B/RS-232-C section of
the 11301 and 11302 User Reference manual, or the 11301A and 11302A User
Reference Manual.
Message: Internal DAC overflow on channel N of LEFT, CENTER, or RIGHT
plug-in unit, where N - 1 or 2.
Cause: Some plug-in unit detected that a requested setting overflowed an
internal DAC. Such overflow usually indicates defective hardware.
In this situation, the plug-in unit sets the DAC to the limit nearer
the requested setting.
Message: Bad Level 2 probe checksum on channel N of LEFT, CENTER, or
RIGHT plug-in unit, where N = 1 or 2.
Cause: Some plug-in unit detected that a Level 2 TEKPROBE had failed or
been improperly connected.
11A32 User Reference Supplement
2-9