Anritsu S251B manual SWR Return Loss and Cable Loss Measurement, DTF Measurement, 4-16, 4-27

Selecting the Frequency Range	. . . . . . . . . . . . . 4-3
Performing a Calibration	. . . . . . . . . . . . . 4-3
Setting the Amplitude Scale	. . . . . . . . . . . . . 4-4
Saving the Setup	. . . . . . . . . . . . . 4-4
Recalling a Setup	. . . . . . . . . . . . . 4-4
Saving a Display to Memory	. . . . . . . . . . . . . 4-5
Recalling a Display From Memory	. . . . . . . . . . . . . 4-5
SWR (Return Loss) and Cable Loss Measurement	. . . . . . . . . . . . 4-9

Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9Device-Under-Test Specification. . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 Selecting the Measurement Mode . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 Selecting the Frequency Range . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 Performing a Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 SWR or Return Loss Measurement . . . . . . . . . . . . . . . . . . . . . . . 4-11 Set the Amplitude Scale and Limit Line . . . . . . . . . . . . . . . . . . . . . 4-11 Setting the Markers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

Cable Loss Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Setting the Amplitude Scale	4-14
Setting the Segment Limit LInes	4-14

DTF Measurement	4-16
Required Equipment	4-16
Device-Under-Test Specification	4-16
Procedure	4-16
Selecting the Measurement Mode	4-16
Performing a Calibration	4-17
DTF Measurement (Determining the Length of the Cable)	4-18
Setting the Amplitude Scale	4-18
Setting the Marker	4-18
DTF Measurement (Determining the quality of the cable.)	4-20
Setting the Amplitude Scale	4-20
Setting the Markers	4-20
Insertion Gain (Amplifier) Measurement . . . . . . . . . . . . . . . . . 4-22
Required Equipment	4-22
Device-Under-Test Specification	4-22
Procedure	4-22
Selecting the Measurement	4-22
Selecting the Frequency Range	4-22
Performing a Calibration	4-22
Amplifier Gain Measurement	4-24
Setting the Markers	4-24
Activating the Bias Tee	4-25
Setting the Amplitude Scale	4-25
Making Power Measurements	4-27

Entering Power Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27 Zeroing the Power Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27 Measuring High Input Power Levels. . . . . . . . . . . . . . . . . . . . . . . 4-27 Displaying Power in dBm and Watts . . . . . . . . . . . . . . . . . . . . . . 4-27 Displaying Relative Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27

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