Anritsu S251C manual Procedure DTF-SWR Mode

Chapter 4 Measurements

Figure 4-5shows an example of a typical DTF return loss trace.

Figure 4-5. Typical DTF Return Loss Trace

In the above example:

￿Marker M1 marks the first connector, the end of the Site Master phase stable Test Port Extension cable. (M1 = 38.42 dB, 3.2 ft.)

￿Marker M2 marks the first jumper cable. (M2 = 32.04 dB, 13.1 ft.)

￿Marker M3 marks the end of the main feeder cable. (M3 = 31.70 dB, 149.0 ft.)

￿Marker M4 is the load at the end of the entire transmission line. (M4 = 43.10 dB, 157.0 ft.)

Procedure - DTF-SWR Mode

The following steps explain how to measure DTF in SWR mode.

Step 1. Press the MODE key.

Step 2. Select the DTF-SWRusing the Up/Down arrow key and press ENTER. Step 3. Follow the same procedure as DTF-Return Loss Mode, above.

4-9