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17
在 80 MHz 和 800 MHz 的頻率下,以較高的頻段
爲準。
這些指引可能不適用於所有情况。 建築物、物件和
人群的吸收與反射會對電磁場的强度産生影響。
a 如無綫電話、地面移動電臺、業餘無綫電、AM 和 FM
無綫電廣播以及電視廣播的基站等固定發射器的場强
在理論上是無法準確預測的。 要評估因固定式無綫電
發射器的存在而産生的電磁環境,應當考慮進行現場電
磁測量。 如果在使用 BPU321OS 血壓監測儀的現場所
測得的場强超過了上述無綫電頻率的規定水平,則應當
對 BPU321OS 血壓監測儀進行觀察,以確認其能够正
常運行。 如果觀察到異常情况,則可能需要採取額外的
措施,比如改變其方向或改變 BPU321OS 血壓監測儀
的放置位置。
b 在 150 kHz 至 80 MHz 的頻率範圍上,場强應當低於
3V/m。
表4:便携式和移動式無綫電通信設備或系統之
間的建議間隔距離-針對非生活保障類設備和系統
便携式和移動式無綫電通信設備與 BPU321OS 血壓監
測儀之間建議的間隔距離
BPU321OS 血壓監測儀是專供在放射性無綫電干擾可
以控制的電磁環境下使用的。 BPU321OS 血壓監測
儀的客戶或用戶可以按下列建議值並根據通信設備的
最大輸出功率,將便携式和移動式無綫電通信設備與
BPU321OS 血壓監測儀保持最起碼的間隔距離,從而有
助於防止電磁干擾。
按發射器頻率界定的間隔距離(m)
發射器的最
大額定功率
W
150 kHz 至
80 MHz
P
V
d]
5.3
[
1
=
80 MHz 至
800 MHz
P
E
d]
5.3
[
1
=
800 MHz 至
2.5 GHz
P
E
d]
7
[
1
=
0.01 0.12 0.12 0.23
0.1 0.38 0.38 0.73
1 1.2 1.2 2.3
10 3.8 3.8 7.3
100 12 12 23
對于其最大額定功率沒有在上表中列出的發射器,其建
議的間隔距離可以使用與該發射器頻率相對應的方程式
來估計,其中 P 爲廠商所標示的發射器的最大額定功
率,單位爲瓦特(W)。
在 80 MHz 和 800 MHz 的頻率下,以較高頻段的間
隔距離爲準。
這些指引可能不適用於所有情况。 建築物、物件和
人群的吸收與反射會對電磁場的强度産生影響。
關於歐西亞(OREGON SCIENTIFIC
󲛛󵆔󱄙󳅣󳵠󳢆www.oregonscientific.com󳌥󵇏󱣀󰅋󶕉󱛛󱾀
󵄲󳅣󲻶󺸵
󰇯󱣞󲾘󺸶󵎩󴈮󳲷󱄙󳅣󰘦󱅏󱣣
info@oregonscientic.com.
BPU321OS_UM_TC_R13.indd 17 13-12-5 ��6:06
105


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