Technical data

48 User’s and Service Guide
87050A Option K22 Performance Tests
Performance Tests
This section contains information to verify the performance of your test set, how to
troubleshoot it if necessary, theory of operation and a block diagram.
Performance testing consists of measuring insertion loss, return loss, and isolation
between all ports.
Please read all applicable safety warnings and cautions in "Safety and Regulatory
Information" on page 68 before servicing the test set.
For the most accurate measurements, the use of an Agilent 8720D 50 Ω network analyzer
is recommended and its use is assumed in these notes. Familiarity with RF/microwave
measurements is also assumed. The use of adapters may be required and their effects
should be accounted for. Performance tests will require the following equipment:
• Agilent 8720D Network Analyzer
• Test Port Extension Cables (85131-60012)
• 85052B Cal Kit
• 909D Option 040 or 0909-60007 50 Ω Load
Make a photocopy of the performance test record pages (later in this section) to record the
results of the performance tests. There are no adjustments required for the 87050A Option
K22 test set.
Perform a full 2-port calibration from 50 MHz to 20 GHz at the ends of two cables attached
to the two test ports of the 8720D. Make sure the calibration is active.
Set up the 8720D with the following:
1. Set the number of points to “201”
2. Set the Bandwidth to “300”
3. Set the 8720D to “Step Sweep”
NOTE The Isolation Cal Routine is done with 16 averages.