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ULTRA LOW INTERMODULATION DISTORTION
9 CHANNELS
LOW INSERTION LOSS OVER ALL BANDS
LOW AMPLITUDE RIPPLE
SHARP ATTENUATION
FAST SWITCHING SPEED
LOW SWITCHING TRANSIENTS
SMALL SIZE AND LOW WEIGHT
FULL MIL
LOW COST
DESCRIPTION
The Comstron Model FA4489 is a switchable filter mod-
ule with the capability of selecting any one of nine chan-
nels with a four TTL control signal. This device is used
as the front-end preselector in a high dynamic range
receiver. The filter module introduces very low inter-
modulation distortion along with low insertion loss - a
necessary requirement for excellent receiver perfor-
mance.
ULTRA LOW INTERMODULATION
DISTORTION
Comstron has developed a proprietary switching matrix
that spans 1 MHz to 1200 MHz (more than 3 decades
wide) along with introducing low intermodulation dis-
tortion and low signal loss. The pin diodes utilized in
the SP9T switch are optimum for high- lifetime carrier,
low junction capacitance and low series resistance and
help produce second and third order output intercept
points (IP
2
and IP
3
) of 90 dBm and 45 dBm respectively.
FA4489