Anritsu S251B manual 4-20, Setting the Amplitude Scale, Setting the Markers, Measurements

Chapter 4 Measurements

DTF Measurement (Determining the quality of the cable.)

NOTE:

If cable length measurement has not been done, calibration must be done be- fore determining the quality of the cable (steps 1-15).

Step 24. Disconnect the Short and connect the Load to the test port extension cable

Setting the Amplitude Scale

Step 25. Press the AMPLITUDE or LIMIT key to call up the Scale Menu.. Optional: Press the AUTO SCALE key to optimize the amplitude scale.

Step 26. In SWR mode, press the TOP soft key and enter 1, ., 0, 5 using the keypad or Up/Down arrow key. Press ENTER to set the top scale. (In Return Loss mode, enter 20.)

Step 27. In SWR mode, press the BOTTOM soft key and enter 1 using the keypad or Up/Down arrow key. Press ENTER to set the bottom scale. (In Return Loss mode, enter 54.)

Setting the Markers

Step 28. Press the MARKER key to call up the Markers menu.

Step 29. Press the M2 soft key to select the M2 marker function. (Note: pressing the ON/OFF soft key activates or deactivates the M2 marker function.)

Step 30. Press the MARKER TO PEAK soft key to find the maximum SWR or Return Loss reading. (See Figures 4-15and 4-16.)

NOTE:

Refer to page 4-4for instructions on saving and recalling a setup or display.

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