Fiber-Span FS31 Series 사용자 설명서 - 페이지 9
{카테고리_이름} Fiber-Span FS31 Series에 대한 사용자 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Fiber-Span FS31 Series 16 페이지. Fiber optic rf repeater system
페이지 인쇄See LED alarm indicator locations in Figure 10.
A receiver alarm is triggered by excessive optical loss. The transmitter alarm is
triggered when the laser transmitter runs over bias. The PA alarm indicates that the
PA is overdriven. The Door / Fan alarm indicates when the door is left open or if a
cooling fan fails. The alarm output is summarized which makes one set of contacts
available on the circular alarm connector. Normal operation leaves the contacts
normally open (NO). In the event of an alarm condition, the corresponding contacts
close.
RF Levels
The Downlink Output level is factory set to meet the RF maximum output level that is
compatible with FCC requirements. The uplink Gain level is factory set to optimize
noise levels for the optical system. RF output levels and gain levels are adjustable
using in-line RF pads. The important In-Line Pad Locations are:
Door
Switch
Pad location
A – Used to lower Downlink RF power without affecting the uplink parameters
B – Used to lower Uplink RF level into the optical transmitter without affecting
Downlink parameters
C – Used to lower Uplink and Downlink levels simultaneously
Parameter to be controlled
Lower Downlink RF Output Power
Lower Uplink RF into Optical Transceiver
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B
Control Board
Figure 10. RF pad locations for RRU
Rev 01 5-DEC-06
A
H
C
L
Power
Supply +28V
Power
Supply +12V
Attenuator
Comments
Pad A SMA-
Power Handling Wattage
Female to
indicated in Table 2.
SMA-Male
Pad B SMA-
Lowers Uplink Sensitivity,
Female to
Maximum Composite RF
SMA-Male
input to Transceiver is 5
dBm, input P1 = 17 dBm.
FC/APC
[Opt Out]
FC/APC
[Opt In]
C
N-F
[RF]
[Alarm]
Line
Cord
Fiber Optic RF Repeater System