Hubbel RFL PLC Hybrid Pro, User Manual

Page: 32 / 44

RF-MCHYBRIDPRO-01
Hubbell Power Systems, Inc. – RFL™ Products
June 2019 32 973.334.3100
5.1 Testing the Balanced Hybrid
The balanced hybrid has two parameters which must be checked to verify correct operation: insertion
loss and isolation.
Table 9 – Balanced Hybrid Loss Characteristics
Balanced Hybrid Loss Characteristics
Insertion Loss
TX1 to OUT ~3.5 dB
TX2 to OUT
~3.5 dB
Isolation (trans-hybrid loss)
TX1 to TX2 >30 dB (minimum 15 dB)
TX2 to TX1 >30 dB (minimum 15 dB)
TX1
TX2
BAL
OUT
Signal In
50-ohm
dummy load
To FSVM /
50-ohm termination
Figure 39 – Measuring Balanced Hybrid Insertion Loss, TX1 to OUT
TX1
TX2
BAL
OUT
Signal In
50-ohm
dummy load
To FSVM /
50-ohm termination
Figure 40 – Measuring Balanced Hybrid Isolation, TX1 to TX2