Keysight 537A Operating Note page 18

Performance Test
17 Return loss measured should be equal to or greater than the following limits:
Table 4
18 If the above limits are not met, test the 537A using a slotted line at the frequency in question.
18
Ret its
urn loss lim
Specification
20.8 dB
9.5 dB
Lower limit of read ing
Coupler d irectivity
26 dB
27.8 dB
11.0 dB
30 dB
24.6 dB 21.9 dB
10.5 dB
Keysight 537A Operating Note
40 dB
9,8 dB