Anritsu S251C Typical Line Sweep Test Procedures, System Return Loss Measurement, Measurements

Chapter 4 Measurements

Typical Line Sweep Test Procedures

This section provides typical line sweep measurements used to analyze the performance of a transmission feed line system.

System Return Loss Measurement

System return loss measurement verifies the performance of the transmission feed line sys- tem with the antenna connected at the end of the transmission line. To measure the system return loss:

Required Equipment

￿Site Master Model S251C

￿Precision Open/Short, Anritsu 22N50 or Precision Open/Short/Load, Anritsu OSLN50LF

￿Precision Load, Anritsu SM/PL

￿Test Port Extension Cable, Anritsu 15NNF50-1.5C

￿Optional 510-90 Adapter, DC to 7.5 GHz, 50 ohm, 7/16 (F)-N (M)

Device Under Test

￿Transmission Feed Line with Antenna

Procedure

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. Calibrate the Site Master as described on page 3-2.

Step 5. Connect the Device Under Test to the Site Master. A trace will be displayed on the screen when the Site Master is in the sweep mode.

Step 6. Press SAVE DISPLAY (page 3-5) name the trace, and press ENTER.

NOTE: The antenna must be connected at the end of the transmission feed line when conducting a System Return Loss measurement.

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