Keysight Technologies U3045AM04, User'S And Service Manual

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18 Keysight U3045AM04 User’s and Service Guide
U3045AM04
System Operational Check
1-
System Operational Check
The following procedure will confirm that the RF interface cables between the
test set and analyzer are installed and the system is working correctly.
Before beginning this procedure you should complete the following steps:
— Stack the analyzer on top of the test set.
— Install the test set interface cable on the rear panel.
— Install all of the RF interface cables on the front panel.
— Install the included female 2.4 mm short (85056-60021) to analyzer’s
Port 1.
— Ensure that the connectors are clean.
Equipment Setup
— Turn On the test set and analyzer.
— Preset the analyzer and make the following settings:
— Set to Multi-Port Mode (see “Multiport Mode Operation” on page 22
— Frequency range: 10 MHz to 50 GHz
— IFBW: 1 kHz
— Scale: 20 dB/Div
— Set the analyzer to measure S11
Check Results
The 2.4 mm short will be moved to each test port and the trace on the analyzer
is set to measure the S-parameter of each port. An uncorrected Sxx reflection
response trace should be displayed and resemble the plots indicated in the
Table 7 on page 18 . If you suspect an RF signal path problem, refer to the RF
cable diagram and check the interface cables associated with the signal path
for proper installation.
Some trace amplitude ripple is expected on the reflection response due to the
use of a short as a test device. Use an ECal to verify reflection tracking.
Table 7 Reflection Response Results
Reflection Port Response Trace Cable Path Diagram
Ports 1-4
Figure 12 on page 19 Figure 13 on page 19
Ports 5-8 Figure 14 on page 20 Figure 15 on page 20