User's Manual

Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide
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Environmental and Mechanical Specifications
The environmental and mechanical specifications are summarized in Table 5. We have not
completed shock and vibration testing at this time.
Table 5. InCell™ Environmental and Mechanical Specification
Parameters CDU RAU
Enclosure Dimensions
1.75”H x 16.75”W x 12”D
1U, 19” rack-mountable
1.5”H x 5”W x 6.5”D
Enclosure Weight 4 pounds 0.6 pounds
RF Connector N-female, bi-directional SMA-female, bi-directional
Fiber Connector 6 pairs (12), SC Type 1 pair (2), SC Type
Remote Alarm from CDU
9-pin D-Sub with summary power and
system link status
N/A
Local Alarm
One power and one link status LED per
antenna port
One power and one link status LED
AC Power 100-240 VAC, 47-63 Hz N/A
DC Power 24 VDC output to each RAU +28 to +12 VDC input
Maximum DC Power Draw
CDU: 10 Watts
System: 40 Watts with 6 RAUs
5 Watts
MTBF > 27,000 hours > 180,000 hours
Storage Temperature -10 to +70
o
C
Operating Temperature 0 to +50
o
C
Humidity 0 to 95 % RH, non-condensing
MTBF
A system MTBF using one CDU and six RAU’s is calculated to be 26,954 hours for the slim line
unit and 9,851 hours for a fully populated 3U 20 unit chassis. Each RAU has a MTBF of
181,265 hours. These MTBF values were calculated using the Bellcore part count method.
MTTR
Low MTTR values are achieved due to the extensive internally monitoring capability. The
MTTR of the Slim Line unit is estimated at 15 minutes using a board replacement maintenance
concept. The MTTR for the 3U chassis is less than 5 minutes as modules can be easily replaced
while the unit is operating. The RAU MTTR is 5 to 30 minutes depending upon the complexity
and ease of access to the installed device. The proposed maintenance concept for the RAU is a
direct replacement of the unit.