ALLIED'S ELECTRONICS DATA HANDBOOK

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Constant Impedance Attenuators in Parallel

 

Table of R1 Values in Ohms

Z Number of Channels
2 3 4 5 6
30 10 15 18 20 21.5
50 16.6 25 30 33.3 35.7
150 50 75 90 100 107
200 66.6 100 120 133 143
250 83.3 125 150 166 179
500 166 250 300 333 357
600 200 300 360 400 428
Network
db loss		 6 9.5 12 14 15.5
Insertion loss
in db = 20 log10N
Where ZL = identical line and load impedances;
and N = number of channels in parallel.

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