HP 8712ET User Manual

ES User’s Guide 6-17
Calibrating for Increased Measurement Accuracy
Calibration Choices
This method of calibration is only necessary when trying to achieve
maximum dynamic range (>100 dB). A response and isolation calibration
prompts you to connect loads to both ports and then to connect a through
cable. These standards are measured across the frequency band you have
defined, using the number of points you have defined. These
measurements are used to remove systematic errors caused by frequency
response and crosstalk. They do not correct for source and load match.
This method of calibration is superior to the standard response
calibration. This calibration prompts you to connect an open, a short, and
a load to port 1 (for measuring S
21
), or port 2 (for measuring S
12
) and to
connect a through cable. The analyzer measures each standard across
the frequency band you have defined, using the number of points you
have defined. The measurements of these standards are used to remove
systematic errors caused by frequency response and source match. They
do not correct for load match.
This method of calibration is the most accurate form of error correction
for measuring two-port devices since it can account for all of the major
sources of systematic error. This calibration prompts you to connect a
through standard between port 1 and port 2, and then to connect an
open, a short, and a load to port 1. Then it prompts you to connect an
open, a short, and a load to port 2. The analyzer measures each standard
across the frequency band you have defined, using the number of points
you have defined. The measurements of these standards are used to
remove systematic errors caused by frequency response, load match,
source match, and directivity. When a two-port calibration is selected,
the analyzer automatically measures all four S-parameters. To quickly
view each of the four S-parameters press ,
and then press the desired S-parameter softkeys under the or
menu. You may need to adjust the scaling to view each of the
S-parameters.
Response & Isolation
Enhanced Response
User 2-Port
MENU
Trigger
Hold
MEAS 1
MEAS 2

HP 8712ET Specifications

General

Brand	HP
Model	8712ET
Category	Measuring Instruments
Language	English