R&S ZNB Series User Manual page 377

®
R&S ZNB/ZNBT
Application: Graduated quality check
The two pass/fail signals can be used to distinguish three quality levels of a DUT. The
test is performed on two identical traces Trc1 and Trc2 within the same channel. Trc1
is configured with a tighter, Trc2 with a looser set of limit lines. For Trc1 "TTL1 Pass" is
enabled, for Trc2 "TTL2 Pass".
●
TTL1: signal
If Trc1 passes (and so does Trc2), the quality of the DUT is good.
●
TTL1: no signal, TTL2: signal
If Trc1 fails but Trc2 passes, the quality of the DUT is still sufficient.
●
TTL1: no signal, TTL2: no signal
If both Trc1 and Trc2 fail, the quality is poor.
Instead of using two traces, it is possible to consider two groups of traces that are
assigned to "TTL1 Pass" and "TTL2 Pass", respectively.
Note: Default values "TTL1 Pass" / "TTL2 Pass" for new traces can be set in the
"Advanced" tab of the "System Config" dialog (see
on page 761).
Remote command:
CALCulate<Chn>:LIMit:TTLout<Pt>[:STATe]
Shift Lines
By setting the "Stimulus" and "Response" values it is possible to shift a previously
defined limit line in x and y direction, respectively, without having to redefine the con-
stituent line segments.
Remote command:
CALCulate<Chn>:LIMit:CONTrol:SHIFt
CALCulate<Chn>:LIMit:UPPer:SHIFt
CALCulate<Chn>:LIMit:LOWer:SHIFt
5.6.1.2 Define Limit Lines dialog
The "Define Limit Lines" dialog defines the limit lines for the active trace on a segment-
by-segment basis. For each segment, the limit is defined as a line connecting two
points (with linear or logarithmic "Interpolation"), or as a user-defined formula.
Access: Trace – [Line] > "Limit Test" > "Define Limit Line..."
Background information
Refer to
When you switch to a different
different sweep variable, however, the limit lines cannot be
sponding
If you want to define limit lines for the new sweep variable, you first have to
existing limit lines for the old sweep variable.
User Manual 1173.9163.02 ─ 62
Chapter 4.4.1, "Limit check",
sweep
limit check cannot be executed.
"TTL Pass Default Values"
on page 144.
type, existing limit lines are preserved. With a
displayed
GUI reference
Lines softtool
and the corre-
delete all
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