
4-32
ET User’s Guide
Using Instrument Functions
Using Limit Testing
To Create a Single Point Limit
Sometimes you may only be interested in the power level at one
particular frequency. In this case, you may wish to use a single point
limit. In the following example, use the setup from the previous
examples and assume that your bandpass filter’s specified insertion loss
at 174 MHz must be less than 3 dB. The following instructions create a
−
3 dB single point limit at 174 MHz.
CAUTION
Limit tests are only performed on actual data points, not the interpolated
values between. When setting a single point limit, the limit is actually
applied to the closest data point to the frequency of the set limit. See
“Additional Notes on Limit Testing” on page 4-39
1. Press
.
2. Press
.
3. Press
.
To Use Marker Limit Functions
The following marker limit test types are available in the marker limit
table:
• Statistic: Mean
• Statistic: p-p
• Flatness
• Delta Ampl
• Delta Freq
You can use pass/fail limit testing on three parameters of the marker
math functions: statistical mean, peak-to-peak ripple, and flatness. (See
“To Use Marker Statistics” on page 4-18
and
for more information on these types of searches.) You can
also use specific markers to limit-test delta amplitude and delta
frequency.
All of these special marker limit functions can be used in conjunction
with regular limit line testing.
Prior Menu Add Limit Add Min Point
Frequency
174
MHz
Limit
−
3
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 ...