Service manual

8510XF Network Analyzer Systems 2-39
Installation
System Operational Test
System Operational Test
This is a basic operator’s check, designed to establish that the system is
functioning normally. It is not a performance test (the performance
verification procedure for the 8510XF is described in Chapter 4).
This test measures the power levels of four signals within the system, and
compares them to the typical levels that should be present during normal
operation of the system. During the test, you will measure the power levels
of the four user parameters: User 1 (a
1
), User 2 (b
2
), User 3 (a
2
), and User
4(b
1
). Measured levels will be compared to the typical levels shown in
Table 2-14 on page 2-41.
User parameters are measurements of the IF input levels received by the
network analyzer. (Figure 2-24 below shows a typical 8510XF user
parameter test plot.) During normal operation of the system, the absolute
level of any IF is much less important than the ratio between one IF and
another. However, the IF levels give a useful indication that the system is
functioning normally.
Figure 2-24 Typical User Parameter Test Plot (User 3, a
2
)