Comtech EF Data EQ90 Series - Manual (Page 39)

EQ90 Amplitude Equalizer Operation
Rev. 2 3-15
fo
AMPLIUDE DELAY
40
NS
36 MHz
fo = 70 Mhz
0.1 dB/CM
Figure Chapter 3-12. Equalizer Composite Delay Response
By adjusting all sections 1 MHz above or below the given frequencies, a 17 ns linear
positive or negative slope is achieved (refer to Figure Chapter 3-13 and Figure Chapter
3-14). Thus, small frequency offsets achieve large linear delay components. A frequency
offset of only 4 MHz will produce linear delay components of about 70 to 80 ns.
Smaller IF bandwidths require fewer sections, which can be, spaced closer together in
frequency to achieve the desired delay response.
DE
LA
Y
(N
S
)
EQUALIZER
DELAY COMPONENT
LINEAR DELAY
COMPONENT
IF FREQUENCY (MHz)
Figure Chapter 3-13. All Sections Tuned 1 MHz Lower in Frequency