R3765/67G Series Network Analyzer Operation Manual
7.8 CDMA IF Filter Analysis Function
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<Example of CDMA IF Filter Analysis>
An example of CDMA IF Filter Analysis is shown above. The C.F, B.W, I.L and RPL are
obtained using the loss (X dB) specified by {WIDTH VALUE}. When one of these has been
calculated, the pass band is displayed with the
↑
marker.
In addition, the ATTN1 and 2 values are obtained as follows: After setting the C.F the user
sets the ATTN FREQ1. The analyzer then subtracts the ATTN FREQ1 from the CF and
calculates the point where this range intersects the trace. It then calculates the point where
the addition of the ATTN FREQ1 to the CF intersects the trace, then calculates the range
from these points to the I.L. Finally, these two points are compared, and the shorter one is
designated as ATTN1. ATTN2 is calculated in the same way and both are indicated by
↑
markers on the display.
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