Anritsu S251B - Manual (Page 60)

Cable Loss Measurement
The following frequency domain measurement is an example of a Cable Loss measurement
made over a selectable frequency range following the Marker setting steps 32 to 35.
NOTE:
If SWR/Return Loss measurement has not been done, calibration must be per-
formed before determining the cable loss.
Step 36. Disconnect the load from the end of the cable and replace it with a short.
Step 37. Press the MODE key.
Step 38. Use the Up/Down arrow key to scroll to CABLE LOSS - ONE PORT .
Step 39. Press ENTER to select Cable Loss measurement mode.
Setting the Amplitude Scale
The following procedure sets the scale display.
Step 40. Press the AMPLITUDE key to call up the Scale Menu.
Step 41. Press the TOP soft key and enter 0 using the keypad or Up/Down arrow key.
Press ENTER to set the top scale.
Step 42. Press the BOTTOM soft key and enter 1 using the keypad or Up/Down arrow
key. Press ENTER to set the bottom scale.
NOTE:
An alternative method of setting the amplitude scale is to use the
AUTO SCAL E
key.
Setting the Segment Limit LInes
The following procedure sets the segment limit lines.
Step 43. Press the AMPLITUDE or LIMIT key to call up the Segment Limit Line menu.
Step 44. Press the LIMIT soft key to activate the segment limit line table.
Step 45. Use the Up/Down arrow key to scroll to segment #1 and press the EDIT SEG-
MENT soft key to change the parameter values for segment #1.
Step 46. Use the Up/Down arrow key to scroll to the START FREQ parameter and press
ENTER to edit the value.
Step 47. Enter 8, 2, 4 using the key pad or the Up/Down arrow key. Press ENTER to set
the Start Frequency to 824 MHz.
Step 48. Use the Up/Down arrow key to scroll to the START FREQ LIMIT parameter and
press ENTER to edit the value.
Step 49. Enter ., 5. Press ENTER to set the Start Frequency Limit value.
Step 50. Use the Up/Down arrow key to scroll to the STOP FREQ parameter and press
ENTER to edit the value.
4-14
Chapter 4 Measurements