Anritsu S251C User Manual
Page 53
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 4-3 is an example of a typical transmission line cable loss trace.
Chapter 4 Measurements
4-6
Figure 4-3.
Typical Transmission Line Cable Loss Trace