? p roduct i nformation rf components group applications: ? set top box ? dbs this product information is from specification: BSFC78GW6; issue date: january 19, 1997. copyright ?1998, sharp electronics corp. all rights reserved. all tradenames are the registered property of their respective ow ners. specifications are subject to change without notice. smt98083 pin description BSFC78GW6 dbs tuner features ? receiving frequency range 950 mhz to 2,150 mhz ? input level -65 dbm to -25 dbm ? nominal input impedance 75 w ? intermediate frequency 479.5 mhz ? electronic tuning with frequency synthesizer channel selection system ? pll reference frequency 125 khz ? l.o. step size 125 khz ? l.o. internal clock frequency 4 mhz xtal ? if band width 55 mhz (3 db down) ? nominal output level -30 dbm ? supply voltage (b2, b3) 5.0 v 0.3 v dc ? odu power (lnb1) 25 v, 350 ma max. ? tuning voltage (tun) 29 v 1 v dc, 0 v to 5 v dc (agc) [0 v to max. gain, 5 v to min. gain] ? f-type female input structure ? operating temperature 0c to 60c ? storage temperature -20c to 70c ? operating humidity, less than 85% ? storage humidity, less than 90% description this product brief covers the BSFC78GW6 dbs tuner intended for use in satellite receivers. block diagram r e b m u ne m a no / i) v ( t l o v 1t u p n i f ri 2 3* 1 b n li 4d n g 52 bi v 5 + 6d n g 7d n g 8e li 9k c o l ci 0 1a t a di 1 13 bi v 5 + 2 1n u ti v 0 2 + 3 1c g ai v 5 C v 0 4 1d n g 5 1d n g 6 1d n g 7 1d n g 8 1t u o f io note: *to lnb if amp if amp saw filter (55 mhz) if out 479.5 mhz 78gw6-1 lnb 1 b2 (+5 v) agc b3 (+5 v) rf att rf amp rf amp rf input 950 mhz - 2,150 mhz rf amp mixer image filter agc control vco pll synthesizer ix2083pa le cl da tun
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