GUI Reference
R&S
®
ZNA
362
User Manual 1178.6462.02 ─ 12
If a channel contains several traces, is possible to assign each of them to any TTL out-
put. The assignment divides the traces of the channel into four groups:
●
not assigned to signal 1 or signal 2
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assigned to signal 1, but not to signal 2
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assigned to signal 2, but not to signal 1
●
assigned to both signals
If several traces are assigned to a pass/fail signal, then the TTL signal is only gener-
ated if all traces are within their respective limits. It is switched off if one trace exceeds
those limits.
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.
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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.
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
6.6.1.2
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
Lines Softtool