
ET User’s Guide
3-51
Making Measurements
Making Measurements with the Auxiliary Input
Making Measurements with the
Auxiliary Input
The auxiliary input (AUX INPUT) is located on the rear panel of your
analyzer. See
Figure 7-2, “Analyzer Connectors—Rear Panel BNC
. This input is designed to monitor
sweep-related dc control signals of devices generally used in conjunction
with the analyzer, such as a dc-biased amplifier, or a voltage controlled
oscillator (VCO).
The AUX INPUT is not recommended for use as an oscilloscope, for
several reasons. This input is sampled only once per data point
regardless of sweep speed, bandwidth, or number of points per sweep,
and sampled data points may not occur at evenly spaced intervals unless
the analyzer is in CW mode.
The AUX INPUT sampling rate depends upon the instrument state and
sweep. In CW mode with the fastest possible sweep time (
set to AUTO), system bandwidth has the most significant effect on this
timing. Data points are typically taken at about 0.2, 0.6, 7.2, and 70 ms
intervals in wide, medium, narrow, and fine bandwidths, respectively.
This effect must be taken into account if attempting to view signals that
are unrelated to the sweep ramp. For best accuracy, input signal slew
rate should be less than 700 volts per second.
Even though the AUX INPUT is not recommended for use as an
oscilloscope, it is possible to view sine wave signals up to about 400 Hz
with reasonable accuracy by placing the analyzer in CW mode with wide
system bandwidth.
Sweep Time
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 ...