Anritsu S251C Guide de l'utilisateur télécharger pdf (Page 54)

Figure 4-5 shows an example of a 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-SWR using the Up/Down arrow key and press

ENTER.

Step 3. Follow the same procedure as DTF-Return Loss Mode, above.

Chapter 4 Measurements

4-9

Figure 4-5. Typical DTF Return Loss Trace

1 2 ... 49 50 51 52 53 54 55 56 57 58 59 ... 80 81

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Anritsu S251C Guide de l'utilisateur Page 54