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laforge, 02/19/2016 10:47 PM
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PageOutline = Motorola Horizon macro BTS =
The Motorola Horizon macro BTS is a BTS model manufactured by Motorola in the late 1990ies.
It can support up to 6 TRX, typically in a configuration of 3 sectors.
There is currently no support for it in OpenBSC, but we are working on it.
HardwareImage(horizonmacro_cabinet_door_open.jpg, 50%) === CTU ===
The up to 6 CTU modules are the individual transceivers. They plug into the SURF RF backplane and have a front-accessible
DB9 serial port, as well as a SMA connector for the TX PA output.
This TX PA output is normally wired using a ~10cm semi-rigid SMA cable to the TX input port of a combiner.
=== Combiner ===
The combiner / duplexer combines the TX signal of two CTU and duplexes it with the Rx path in order to be able to have two TRX attached to one antenna
=== MCUF ===
The MCUF is a full-size digital board and contains the BTS controller
Image(horizonmacro_mcuf_pcb_top.jpg, 33%)
Image(horizonmacro_mcuf_front.jpg, 33%)
=== NIU ===
The NIU is a E1 interface card for up to two E1 lines. Multiple NIU boards can be plugged into the rack
=== BPSM ===
The BPSM is a small power supply for the NIU, MCUF and other digital boards
=== A-bis interface ===
The A-bis interface is via classic E1 lines. The Horizon indoor cabinet supports up to 6 E1 ports.
Each NIU module serves 1 or 2 E1 ports.
The E1 ports are physically routed to the BIB (Balanced Interface Board) module on top of the cabinet.
The pinout of the 37pin D-Sub connector on top of the BIB board has been reversed as:Pin | Transformer | |||
1 | T1.1 | |||
2 | T2.1 | |||
3 | GND | |||
4 | T4.1 | |||
5 | T5.1 | |||
6 | GND | |||
7 | T7.1 | |||
8 | T8.1 | |||
9 | GND | |||
10 | T10.1 | |||
11 | T11.1 | |||
12 | GND | |||
13 | T13.1 | |||
14 | T14.1 | |||
15 | GND | |||
16 | T16.1 | |||
17 | T17.1 | |||
18 | GND | |||
19 | GND | |||
20 | T1.8 | |||
21 | T2.8 | |||
22 | ||||
23 | T4.8 | |||
24 | T5.8 | |||
25 | ||||
27 | T7.8 | |||
28 | T8.8 | |||
29 | T10.8 | |||
30 | T11.8 | |||
31 | ||||
32 | T13.8 | |||
33 | T14.8 | |||
34 | ||||
35 | T16.8 | |||
36 | T17.8 |
=== MCUF ===
There is a 20MByte Intel Series2 Flash PCMCIA card inside the MCUF. IT contains software + configuration for the BTS.
Updated by laforge about 8 years ago · 4 revisions