FA4489 AEROFLEX | Alldatasheet

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Technical content

Precision Supercomponents For Critical Applications FA4489

9 CHANNEL PRESELECTOR

DISTORTION 1 MHZ - 1200 MHZ

FEATURES

  • 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 (IP2 and IP3) of 90 dBm and 45 dBm respectively.

IP2 TEST SETUP FOR CHANNEL 2 AND 3 PERFORMANCE 90 dBm Level ADRET MODEL 7100A SIGNAL GENERATOR SET FOR 25 MHZ ADRET MODEL 7100A SIGNAL GENERATOR SET FOR 30 MHZ BANDPASS FILTER

33.4 MHZ20 MHZ

93.1 MHZ55.8 MHZ COMSTRON FA4489 PRESELECTOR SPECTRUM ANALYZER HP8568A RES.BW=10HZ VIDEO BW=3HZ RF ATT=30dB SPAN=100HZ MC-ZSC-2-1 POWER SPLITTER BANDPASS FILTER

Precision Supercomponents For Critical Applications

9 CHANNELS WITH SHARP ATTENUATION

Each of the 9 channel filters is composed of 12 pole pseudo-elliptic function lumped component (lc) elements. These elements are optimized to provide the highest amount of attenuation for the given package size. The fil- ters provide a minimum of 60 dB/octave and provide an ultimate attenuation of 50 dB minimum to 5000 MHz. S P T S P T RF IN RF OUT DRIVERS DECODER

4 LINE TTL CONTROL INPUT

Precision Supercomponents For Critical Applications

35 South Service Road Plainview, NY 11803

TEL: 516-694-6700 FAX: 516-694-2562 OUTLINE DRAWING SPECIFICATIONS CHARACTERISTICS TYPICAL LIMITS INSERTION LOSS ACROSS ALL BANDS 2.0 DB 3.0 DB PASSBANDS BAND 1 1-20 MHZ .8 DB 1.0 DB MAX BAND 2 20-34 MHZ .8 DB 1.0 DB MAX 3/4 OCTAVE EACH .8 DB 1.0 DB MAX BAND 9 640-1280 MHZ .8 DB 1.0 DB MAX STOPBAND ATTENUATION 60 DB/OCTAVE 50 DB/OCTAVE MIN ULTIMATE ATTENUATION TO 5000 MHZ 55 DB 50 DB MIN VSWR ( 50 OHMS ) IN/OUT ALL BANDS 1.4:1 1.5:1 MAX OUTPUT INTERCEPT POINTS

2 ND ORDER + 92 DBM +90 DBM MIN

3 RD ORDER + 47 DBM +45 DBM MIN

SWITCHING SPEED 6 µSEC 10 µSEC MAX DC POWER + 5 V 140 MA MAX - 15 V 100 MA MAX WEIGHT 14 OUNCES MECHANICAL CONFIGURATION EDGE CONNECTORS WITH GPO RF IN/OUT COMSTRON