Uscu; Figure 3-21 Panel Of The Uscub1 (0.5 U); Figure 3-22 Panel Of The Uscub2 (1 U) - Huawei BBU3900 Hardware Description

BBU3900
Hardware Description
DIP
Switch

3.2.8 USCU

This section describes the Universal Satellite card and Clock Unit (USCU).
Panel
There are two types of USCU: USCUb1 and USCUb2, as shown in
3-22.

Figure 3-21 Panel of the USCUb1 (0.5 U)

Figure 3-22 Panel of the USCUb2 (1 U)

(1) GPS port
Functions
The USCU has the following functions:
l
Issue 11 (2010-11-10)
DIP Status
1
ON
(2) RGPS port
The USCU provides interface for an external RGPS device (such as a reused device of the
operator), Metro1000 device, BITS device, and TOD input.
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2 3
ON ON
Other settings of the DIP bits
(3) TOD port
3 BBU3900 Equipment
4
ON
Figure 3-21
(4) M-1PPS port (5) BITS port
Description
The E1
impedance is
set to 75
ohms.
Disabled
and Figure
3-23