User Manual

FCC ID : U88GSTR-815DC-SPR
HYUNDAI CALIBRATION & CERTIFICATION TECHNOLOGIES CO., LTD.
SAN 136-1, AMI-RI, BUBAL-EUP, ICHEON-SI, KYOUNGKI-DO, 467-701, KOREA
TEL:[phone] FAX:[phone] www.hct.co.kr
Report No. : HCT-R07-008 8/23
<Pic.5> iDEN In-building RF Repeater Uplink Block Diagram
2.2.4 Adjustable Band Edge functional circuit configuration
In case of IDEN using the bandwidth of 800MHz and 900MHz, many of Out of Band Signals is input via
Donor ANT Outdoor. The most worried signal among them is Paging Signal. Commercial Paging Signal of
929MHz~932MHz, 940MHz~941MHz, having the strength of Max. -15dBm, is to be inputted into Donor ANT.
Among this two kind of Paging Signal Band, 929MHz~932MHz bandwidth is possible for sufficient Rejection
via SAW Filter, But 940MHz~941MHz is difficult to gain big decreasing volume even if use SAW Filter
because Band Edge is as close as to be folded to 935MHz~940MHz of being the frequency of iDEN900MHz
Downlink.
To prepare for this environment, Down Link of iDEN Repeater is designed to have additional Roll Off
characteristic by decreasing band of SAW Filter in the station adjacent to paging signal, for it having the
function of Adjust Band Edge that can decrease c of high frequency by 200 kHz, 400 kHz each.