Anritsu S251C manual Measurements, 0.65

Chapter 4 Measurements

Step 14. Verify the measured insertion loss against the calculated insertion loss:

	Type	Attenuation (dB/ft)	￿ Length (ft)	= Loss (dB)
First Jumper	LDF4-50A	0.0325	20	0.65
Main Feeder	LDF5-50A	0.0186	150	2.79
Top Jumper	LDF4-50A	0.0325	10	0.325

The number of connector pairs (3) times the loss per pair (in dB) equals the con- nector loss: 3 ￿ 0.14 = 0.42.

The insertion loss of the transmission system is equal to:

First Jumper loss + Main Feeder Loss + Top Jumper Loss + Connector Loss = Insertion Loss

0.65 + 2.79 + 0.325 + 0.42 = 4.19 dB

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

Figure 4-3. Typical Transmission Line Cable Loss Trace

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