Agilent Technologies ENA Series User Manual page 213

Example 4-4 When a part of a frequency range specified with a subclass lies outside the
measurement frequency range
For a measurement frequency range (1 GHz - 6 GHz), if you define a standard of subclass
1 (1 GHz - 5 GHz) and a standard of subclass 2 (5 GHz-8 GHz), a part of subclass 2 (6
GHz-8 GHz) lies outside the measurement frequency range, but the other part (5 GHz-6
GHz) lies within it, so calibration is possible.
Figure 4-60 When a part of a frequency range lies outside the range
Chapter 4
Specifying Different Standard for Each Frequency
Calibration
207