
4-28
ET User’s Guide
Using Instrument Functions
Using Limit Testing
Using Limit Testing
Limit testing is a measurement technique that compares measurement
data to constraints that you define. Depending on the results of this
comparison, the analyzer can indicate if your device either passes or fails
the test.
Limit testing is useful for real-time tuning of devices to specifications.
When limit testing is turned on, pass/fail results can be output to the
display and also to the LIMIT TEST TTL IN/OUT connector on the rear
panel. See
Limit testing is implemented by creating individual flat, sloping, or
single point limits on the analyzer display. These types of lines may be
used individually or combined to represent the performance parameters
for your device under test. Also available are limit testing capabilities for
five types of marker searches: statistical mean, peak-to-peak ripple,
flatness, delta amplitude, and delta frequency.
NOTE
Limit testing is only performed on the measurement data trace. It cannot
be performed on a memory trace.
NOTE
Limit line testing is not available when the analyzer is in Smith chart or
polar format. If limit lines are on and you change to Smith chart or polar
format, the analyzer will automatically turn off the limit line(s).
The following examples are performed using a transmission
measurement of the bandpass filter shipped with your instrument. To
follow along with these examples, connect your filter to the analyzer and
press:
PRESET
FREQ
Center
175 MHz
Span
200 MHz
SCALE
5
Enter
Reference Level
−
15 Enter
Summary of Contents for HP 8712ET
Page 8: ...viii ET User s Guide ...
Page 17: ...ET User s Guide 1 1 1 Installing the Analyzer ...
Page 34: ...1 18 ET User s Guide Installing the Analyzer Preventive Maintenance ...
Page 35: ...ET User s Guide 2 1 2 Getting Started ...
Page 52: ...2 18 ET User s Guide Getting Started Performing the Operator s Check ...
Page 53: ...ET User s Guide 3 1 3 Making Measurements ...
Page 118: ...3 66 ET User s Guide Making Measurements Measuring Impedance Magnitude ...
Page 119: ...ET User s Guide 4 1 4 Using Instrument Functions ...
Page 143: ...ET User s Guide 4 25 Using Instrument Functions Using Markers Figure 4 15 Delta Marker Mode ...
Page 149: ...ET User s Guide 4 31 Using Instrument Functions Using Limit Testing Figure 4 16 Limit Lines ...
Page 207: ...ET User s Guide 5 1 5 Optimizing Measurements ...
Page 226: ...5 20 ET User s Guide Optimizing Measurements Measuring Devices with Long Electrical Delay ...
Page 227: ...ET User s Guide 6 1 6 Calibrating for Increased Measurement Accuracy ...
Page 266: ...6 40 ET User s Guide Calibrating for Increased Measurement Accuracy Checking the Calibration ...
Page 267: ...ET User s Guide 7 1 7 Front Rear Panel ...
Page 292: ...7 26 ET User s Guide Front Rear Panel Line Module ...
Page 293: ...ET User s Guide 8 1 8 Hardkey Softkey Reference ...
Page 395: ...ET User s Guide 9 1 9 Specifications ...
Page 397: ...ET User s Guide 9 3 Specifications System Performance ...
Page 443: ...ET User s Guide 10 1 10 Safety and Regulatory Information ...
Page 449: ...ET User s Guide 10 7 Safety and Regulatory Information Regulatory Information ...
Page 450: ...10 8 ET User s Guide Safety and Regulatory Information Regulatory Information ...
Page 451: ...ET User s Guide 11 1 11 Factory Preset State and Memory Allocation ...