Motorola HT Series Service Manual page 56


7KH ,) VLJQDO FRPLQJ RXW RI WKH PL[HU LV WUDQVIHUUHG WR WKH FU\VWDO ILOWHU )/ WKURXJK D UHVLVWRU SDG
DQG D GLSOH[HU & DQG /  0DWFKLQJ WR WKH LQSXW RI WKH FU\VWDO ILOWHU LV SURYLGHG E\ //
& DQG & 7KH FU\VWDO ILOWHU SURYLGHV VRPH RI WKH QHFHVVDU\ VHOHFWLYLW\ DQG LQWHUPRGXODWLRQ
SURWHFWLRQ
 5HFHLYHU %DFN(QG
7KH RXWSXW RI FU\VWDO ILOWHU )/ LV PDWFKHG WR WKH LQSXW RI WKH GXDO JDWH 026)(7 ,) DPSOLILHU
WUDQVLVWRU 8 E\ FRPSRQHQWV / 5  DQG & 9ROWDJH VXSSO\ WR WKH ,) DPSOLILHU LV WDNHQ
IURP WKH UHFHLYH  YROWV 5  $*& YROWDJH LV DSSOLHG WR WKH VHFRQG JDWH RI 8 7KH ,) DPSOLILHU
SURYLGHV D JDLQ RI DERXW G% 7KH DPSOLILHG ,) VLJQDO LV WKHQ FRXSOHG LQWR 8 SLQ  YLD /
5 DQG & ZKLFK SURYLGHV WKH PDWFKLQJ IRU WKH ,) DPSOLILHU DQG 8
7KH ,) VLJQDO DSSOLHG WR SLQ  RI 8 LV DPSOLILHG GRZQFRQYHUWHG ILOWHUHG DQG GHPRGXODWHG WR
SURGXFH WKH UHFRYHUHG DXGLR DW SLQ  RI 8 7KLV ,) ,& LV HOHFWURQLFDOO\ SURJUDPPDEOH DQG WKH
DPRXQW RI ILOWHULQJ ZKLFK LV GHSHQGHQW RQ WKH UDGLR FKDQQHO VSDFLQJ LV FRQWUROOHG E\ WKH
PLFURSURFHVVRU $GGLWLRQDO ILOWHULQJ RQFH H[WHUQDOO\ SURYLGHG E\ WKH FRQYHQWLRQDO FHUDPLF ILOWHUV LV
UHSODFHG E\ LQWHUQDO ILOWHUV LQ WKH ,) PRGXOH 8 
7KH ,) ,& XVHV D W\SH RI GLUHFW FRQYHUVLRQ SURFHVV ZKHUHE\ WKH H[WHUQDOO\ JHQHUDWHG VHFRQG /2
IUHTXHQF\ LV GLYLGHG E\ WZR LQ 8 VR WKDW LW LV YHU\ FORVH WR WKH ILUVW ,) IUHTXHQF\ 7KH ,) ,& 8
V\QWKHVL]HV WKH VHFRQG /2 DQG SKDVHORFNV WKH 9&2 WR WUDFN WKH ILUVW ,) IUHTXHQF\ 7KH VHFRQG /2
LV GHVLJQHG WR RVFLOODWH DW WZLFH WKH ILUVW ,) IUHTXHQF\ EHFDXVH RI WKH GLYLGHE\WZR IXQFWLRQ LQ WKH ,)
,&
,Q WKH DEVHQFH RI DQ ,) VLJQDO WKH 9&2 ZLOO ³VHDUFK´ IRU D IUHTXHQF\ RU LWV IUHTXHQF\ ZLOO YDU\ FORVH
WR WZLFH WKH ,) IUHTXHQF\ :KHQ DQ ,) VLJQDO LV UHFHLYHG WKH 9&2 ZLOO ORFN RQWR WKH ,) VLJQDO 7KH
VHFRQG /29&2 LV D &ROSLWWV RVFLOODWRU EXLOW DURXQG WUDQVLVWRU 4 7KH 9&2 KDV D YDUDFWRU GLRGH
&5 WR DGMXVW WKH 9&2 IUHTXHQF\ 7KH FRQWURO VLJQDO IRU WKH YDUDFWRU LV GHULYHG IURP D ORRS ILOWHU
FRQVLVWLQJ RI 5 &  DQG & 
7KH ,) ,& 8 DOVR SHUIRUPV VHYHUDO RWKHU IXQFWLRQV ,W SURYLGHV D UHFHLYHG VLJQDOVWUHQJWK
LQGLFDWRU 566, DQG D VTXHOFK RXWSXW 7KH 566, LV D GF YROWDJH PRQLWRUHG E\ WKH PLFURSURFHVVRU
DQG XVHG WR FRQWURO WKH DXWRPDWLF JDLQ FRQWURO $*& FLUFXLW LQ ERWK WKH IURQWHQG DQG WKH ,)
7KH GHPRGXODWHG VLJQDO RQ SLQ  RI 8 LV DOVR XVHG IRU VTXHOFK FRQWURO 7KH VLJQDO LV URXWHG WR
8 ZKHUH D ³IOXWWHU ILJKWHU´ SURFHVV LV LPSOHPHQWHG 7KH VLJQDO OHDYHV 8 YLD SLQ ) DQG LV WKHQ
URXWHG WR 8 $6),& ZKHUH VTXHOFK VLJQDO VKDSLQJ DQG GHWHFWLRQ WDNHV SODFH 7KH GHPRGXODWHG
DXGLR VLJQDO LV DOVR URXWHG WR 8 IRU SURFHVVLQJ EHIRUH JRLQJ WR WKH DXGLR DPSOLILHU IRU
DPSOLILFDWLRQ
 +HDU &OHDU ,&
+HDU &OHDU +& ,& LV W\SLFDOO\ XVHG IRU  0+] UDGLRV 7KH +& ,& FRPSULVHV WKUHH PDLQ LQWHUQDO
FLUFXLW EORFNV
‡ &RPSUHVVRU
‡ )OXWWHU )LJKWHU
‡ ([SDQGHU &LUFXLWV
2QO\ WKH )OXWWHU )LJKWHU VHFWLRQ RI WKLV ,& LV XVHG E\ WKLV UDGLR 7KH &RPSUHVVRU DQG WKH ([SDQGHU
DUH LQFOXGHG LQ WKH $6),& 7KHUH DUH VL[ HQDEOHFRQWURO OLQHV RQ WKH +HDU &OHDU ,& ZKLFK GHWHUPLQH
WKH ,&V PRGH RI RSHUDWLRQ 7KH )OXWWHU )LJKWHU (QDEOH OLQH 8( LV FRQWUROOHG E\ $6),& '$&5;
OLQH 8  7KH ORJLF FRQWURO DQG WKH ,& VWDWXV LV VXPPDUL]HG LQ
7KHRU\ RI 2SHUDWLRQ  0+] 5HFHLYHU
Table 2-8 on page 2-39