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Figure 4-5 shows an example of a typical DTF return loss trace.
In the above example:
q
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.)
q
Marker M2 marks the first jumper cable. (M2 = 32.04 dB, 13.1 ft.)
q
Marker M3 marks the end of the main feeder cable. (M3 = 31.70 dB, 149.0 ft.)
q
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