User`s guide

2-4 User’s and Service Guide
Getting Started
Performing the Operator's Check
Performing the Operator's Check
For information on how to control the test set, refer to Chapter 3.
Description
The following operator's check is designed to provide you with a high
degree of confidence that your test set is working properly. It is not
designed to verify specifications. To verify specifications, refer to
Chapter 6.
Procedure
This procedure is for performing a simple operator's check using a
network analyzer of the proper frequency range and impedance.
Equipment Required
• Network Analyzer, 50 Ω impedance (Agilent 8720D)
• Cable, 50 Ω 3.5 mm (part number 85131-60012 or equivalent)
• Calibration Kit, 50 Ω (Agilent 85052B)
Process
Step 1. Perform a one-port reflection calibration at the end of a 50 Ω cable over
the frequency range of 50 MHz to 20 GHz on the analyzer. Verify the
calibration is active and that a cable terminated with a short displays a
return loss of 0 ±0.2 dB.
Step 2. Connect the cable (already connected to the reflection port of the
analyzer) to the reflection port of the 87050A Option K24 test set.
Step 3. Measure the return loss of each section of the test set by selecting ports
1 through 24, one at a time, by using the network analyzer. Terminate
each port being tested with a known good 50 Ω load (greater than
–30 dB). The resulting return loss should be greater than –10 dB (the
absolute value should be greater than 10).
NOTE This is an 80% confidence test only. A unit could pass this simple test
and yet still not function properly. For more complete testing, see
"Performance Tests" in Chapter 6.