Anritsu S331C, S113C, S332C Procedure Return Loss Mode, Typical Transmission Line Cable Loss Trace

Chapter 4 Cable & Antenna Measurements

Figure 4-3 is an example of a typical transmission line cable loss trace.

Figure 4-3. Typical Transmission Line Cable Loss Trace

Procedure - Return Loss Mode

Step 1. Press the MODE key.

Step 2. Select FREQ-RETURN LOSS using the Up/Down arrow key and press

ENTER.

Step 3. Set the start and stop frequencies, F1 and F2, as described on page 3-2.

Step 4. Connect the Test Port Extension cable to the RF port and calibrate the Site Mas- ter as described on page 3-2.

Step 5. Save the calibration set up (page 3-7).

Step 6. Connect the Device Under Test to the Site Master phase stable Test Port Exten- sion cable. A trace will be displayed on the screen as long as the Site Master is in sweep mode.

Step 7. Press the AMPLITUDE key and set TOP and BOTTOM values of the display. In the example below, the TOP is set to 4, and the BOTTOM is set to 10.

Step 8. Press the MARKER key.

Step 9. Set M1 to MARKER TO PEAK.

Step 10. Set M2 to MARKER TO VALLEY.

Step 11. Calculate the insertion loss by averaging M1 (marker to peak) and M2 (marker to valley) and dividing by two as follows:

M1￿ M2

Insertion Loss￿ 2

2

Step 12. Press SAVE DISPLAY (page 3-8) name the trace, and press ENTER.

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