Command Groups
Table 2-30: Mark Commands (cont.)
Command Description
MARK:TOTal?
Returns how many marks are used
MARK:USERLIST The command creates a single user m ark on a waveform in the time domain. The arguments
consist of an enumeration specifying the source waveform, followed by 7 time mark
parameters. You can create up to 1,024 marks. To save all the marks to memory, use
the command
MARK:SAVEALL TOUSER.
Mask Command Group
Use the commands in the Mask Command Group to perform mask and limit
testing, useful for long-term signal monitoring, characterizing signals during
design, or testing on a production line. The commands simplify many tasks, such
as conducting pass/fail tests in search of glitches or other waveform anomalies,
comparing a signal against a known good signal, or against a standard or custom
mask,
counting hits against specific mask segments, and much more.
NOTE. In order to use Mask commands, you need to install an optional Limit and
mask test application module, Tektronix part number DPO4LMT. Also, ≥350 MHz
bandwidth models are recommended for telecommunication standards >55 Mb/s.
NOTE. To ensure that Mask commands are enabled, use the command
APPLication:TYPe LIMITMask.
There are three categories of masks available:
N
OTE. Standard mask support is not available for the MDO3000 series models.
Standard The instrument has a built-in set of pre-defined standard
telecommunications masks (see the
MASK:STANdard command for a complete
list). Although these masks are non-editable, they can be copied and used to
initialize user-defined custom masks.
Limit Test: Limit testing is used to compare a tested signal against a known good
or "golden" version of the same signal with user-defined vertical and horizontal
tolerances. These non-editable masks are created using a Reference waveform or
template. Use the
MASK:TEMPLate commands for limit testing.
Custom: (also referred to in this document as “user mask”). You can create
custom masks and tailor them to your own specific testing requirements. These
commands provide granular control over the points of the mask and offer a
variety of testing options. For instance, you can specify test duration either by
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-31
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