AXELL D-MBR 3007-3008-PS NFPA REPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
VI
UMCD00013 Rev 2.2
© Axell Wireless Ltd
&RPSOLDQFHZLWK)&&GHSOR\PHQWUXOHUHJDUGLQJWKHUDGLDWLRQRIQRLVH
*RRGHQJLQHHULQJSUDFWLFHPXVWEHXVHGLQUHJDUGWRWKHVLJQDOERRVWHU¶VQRLVHUDGLDWLRQ
7KXVWKHJDLQRIWKHVLJQDOERRVWHUVKRXOGEHVHWVRWKDWWKH(53RIWKHRXWSXWQRLVH
IURPWKHVLJQDOERRVWHUVKRXOGQRWH[FHHGWKHOHYHORIG%PLQN+]PHDVXUHPHQW
EDQGZLGWK
,QWKHHYHQWWKDWWKHQRLVHOHYHOPHDVXUHGH[FHHGVWKHDIRUHPHQWLRQHGYDOXHWKHVLJQDO
ERRVWHUJDLQVKRXOGEHGHFUHDVHGDFFRUGLQJO\
,QJHQHUDOWKH(53RIQRLVHRQDVSHFWUXPPR]RXWVLGHRIWKHSDVVEDQG
VKRXOGQRWH[FHHGG%PLQDN+]PHDVXUHPHQWEDQGZLGWK
7KHVLJQDOERRVWHUKDVDQRLVHOHYHORIG%PLQN+]PHDVXUH]
VSHFWUXPRXWVLGHWKHSDVVEDQGRIWKHVLJQDOERRVWHUDQGDQ
LQEDQG
QRLVHOHYHODWDURXQG
G%PLQDN+]EDQGZLGWK7KHUHIRUHWKHQRLVHDWWKHDQWHQQDLQSXWSRUWVKRXOGEH
FDOFXODWHGEDVHGRQHTXDWLRQ
Equation (3) - Input Noise to service antenna
Input Noise to service antenna:
-43 dBm + Service Antenna gain – Antenna splitter losses in dBi – cable loss in dB
Example:
6LJQDOERRVWHUFRQQHFWHGWRVHUYLFHDQWHQQDVZLWKDPORQJòLQFKFDEOH
•
/RVVHVRIVXFKDFDEOHZLWKWKHFRQQHFWRUV aG%
•
*DLQ aG%L
$VVXPLQJVHUYLFHDQWHQQDVDQWHQQDVSOLWWHUORVVHV G%
%DVHGRQHTXDWLRQ,QSXWDQWHQQDQRLVHWRWKHDQWHQQD G%P
7KHLQEDQGLQSXWQRLVHWRWKHDQWHQQDVKRXOGEH GEP
NOTE: In this example you may be required in general to add an external bandpass filter that would
attenuate by additional 7 dB the out of band noise.
Conclusion:
*RRGHQJLQHHULQJSUDFWLFHUHTXLUHVWKDWLQJHQHUDOZKHQWKHRXWRIEDQGQRLVHPHDVXUHG
DWWKHVHUYLFHDQWHQQDLQSXWLVPRUHWKDQ]PHDVXUHPHQWEDQGZLGWK
DQH[WHUQDOEDQGSDVVILOWHUVKRXOGEHDGGHGWRDWWHQXDWHWKHRXWRIEDQGQRLVHOHYHO
&RPSOLDQFHZLWK,&
8QGHU ,QGXVWU\ &DQDGD UHJXODWLRQV WKLV UDGLR WUDQVPLWWHU PD\ RQO\ RSHUDWH XVLQJ DQ
DQWHQQDRIDW\SHDQGPD[LPXPRUOHVVHUJDLQDSSURYHGIRUWKHWUDQVPLWWHUE\,QGXVWU\
&DQDGD7RUHGXFHSRWHQWLDOUDGLRLQWHUIHUHQFHWRRWKHUXVHUVWKHDQWHQQDW\SHDQGLWV
JDLQVKRXOGEHVRFKRVHQWKDWWKHHTXLYDOHQWLVRWURSLFDOO\UDGLDWHGSRZHUHLUSLVQRW
PRUHWKDQWKDWQHFHVVDU\IRUVXFFHVVIXOFRPPXQLFDWLRQ
7KH0DQXIDFWXUHUVUDWHGRXWSXWSRZHURIWKLVHTXLSPHQWLVIRUVLQJOHFDUULHURSHUDWLRQ
)RU VLWXDWLRQV ZKHQ PXOWLSOH FDUULHU VLJQDOV DUH SUHVHQW WKH UDWLQJ ZRXOG KDYH WR EH
UHGXFHG E\ G% HVSHFLDOO\ ZKHUH WKH RXWSXW VLJQDO LV UHUDGLDWHG DQG FDQ FDXVH
LQWHUIHUHQFH WR DGMDFHQW EDQG XVHUV 7KLV SRZHU UHGXFWLRQ LV WR EH E\ PHDQV RI LQSXW
SRZHURUJDLQUHGXFWLRQDQGQRWE\DQDWWHQXDWRUDWWKHRXWSXWRIWKHGHYLFH