Installation Instructions Instruction Manual
Bird Technologies Group       TX RX Systems Inc.
500
400
300
250
200
150
125
100
75
50
50
75 100
125 150 200
250
300
400
500
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
.50
.25
The graph below offers a convenient means of determining the insertion loss of filters, duplexers, 
multicouplers and related products. The graph on the back page will allow you to quickly determine 
VSWR. It should be remembered that the field accuracy of wattmeter readings is subject to 
considerable variance due to RF connector VSWR and basic wattmeter accuracy, particularly at low 
end scale readings. However, allowing for these variances, these graphs should prove to be a useful 
reference.
POWER IN/OUT
VS
INSERTION LOSS
INSERTION LOSS (dB)
INPUT POWER (Watts)
OUTPUT POWER (Watts)
FOR LOWER POWER LEVELS
DIVIDE BOTH SCALES
BY 10 (5 TO 50 WATTS)










