Motorola Horizon macro » History » Version 9
laforge, 02/19/2016 10:47 PM
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1 | 1 | laforge | [[PageOutline]] |
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2 | 2 | laforge | = Motorola Horizon macro BTS = |
3 | 1 | laforge | |
4 | The Motorola Horizon macro BTS is a BTS model manufactured by Motorola in the late 1990ies. |
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5 | |||
6 | It can support up to 6 TRX, typically in a configuration of 3 sectors. |
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7 | |||
8 | There is currently no support for it in OpenBSC, but we are working on it. |
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9 | |||
10 | == Hardware == |
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11 | |||
12 | 3 | laforge | [[Image(horizonmacro_cabinet_door_open.jpg, 50%)]] |
13 | 8 | laforge | [[Image(horizonmacro_cabinet_top.jpg, 33%)]] |
14 | 1 | laforge | === CTU === |
15 | |||
16 | The up to 6 CTU modules are the individual transceivers. They plug into the SURF RF backplane and have a front-accessible |
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17 | DB9 serial port, as well as a SMA connector for the TX PA output. |
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18 | |||
19 | This TX PA output is normally wired using a ~10cm semi-rigid SMA cable to the TX input port of a combiner. |
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20 | |||
21 | 6 | laforge | The CTU is of course fully shielded. But if you remove the shielding cover, it looks like this: |
22 | 7 | laforge | |
23 | 6 | laforge | [[Image(horizonmacro_ctu_pcb.jpg, 50%)]] |
24 | You can see |
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25 | * two diversity receivers in the top left part |
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26 | * digital section in the top right part |
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27 | * transmit section (exciter) in the center |
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28 | * RF power amplifier in the bottom right part |
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29 | |||
30 | 1 | laforge | === Combiner === |
31 | |||
32 | 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 |
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33 | |||
34 | === MCUF === |
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35 | |||
36 | The MCUF is a full-size digital board and contains the BTS controller |
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37 | |||
38 | 4 | laforge | [[Image(horizonmacro_mcuf_pcb_top.jpg, 33%)]] |
39 | [[Image(horizonmacro_mcuf_front.jpg, 33%)]] |
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40 | 1 | laforge | === NIU === |
41 | |||
42 | The NIU is a E1 interface card for up to two E1 lines. Multiple NIU boards can be plugged into the rack |
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43 | |||
44 | 5 | laforge | [[Image(horizonmacro_niu_pcb.jpg, 50%)]] |
45 | |||
46 | 1 | laforge | === BPSM === |
47 | |||
48 | The BPSM is a small power supply for the NIU, MCUF and other digital boards |
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49 | |||
50 | 5 | laforge | [[Image(horizonmacro_bpsm_pcb.jpg, 50%)]] |
51 | |||
52 | === ALARMS === |
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53 | |||
54 | The ALARMS board is monitoring FAN and other alarms in the cabinet. |
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55 | |||
56 | [[Image(horizonmacro_alarms_pcb.jpg, 50%)]] |
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57 | 1 | laforge | === A-bis interface === |
58 | |||
59 | The A-bis interface is via classic E1 lines. The Horizon indoor cabinet supports up to 6 E1 ports. |
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60 | |||
61 | Each NIU module serves 1 or 2 E1 ports. |
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62 | |||
63 | The E1 ports are physically routed to the BIB (Balanced Interface Board) module on top of the cabinet. |
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64 | |||
65 | The pinout of the 37pin D-Sub connector on top of the BIB board has been reversed as: |
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66 | 8 | laforge | ||Pin ||Transformer||Usage|| |
67 | ||1 ||T1.1 ||NIUA0 Port 0 (Tx)|| |
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68 | ||2 ||T2.1 ||NIUA0 Port 0 (Rx)|| |
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69 | 1 | laforge | ||3 ||GND || |
70 | ||4 ||T4.1 || |
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71 | ||5 ||T5.1 || |
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72 | ||6 ||GND || |
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73 | ||7 ||T7.1 || |
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74 | ||8 ||T8.1 || |
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75 | ||9 ||GND || |
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76 | ||10 ||T10.1 || |
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77 | ||11 ||T11.1 || |
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78 | ||12 ||GND || |
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79 | ||13 ||T13.1 || |
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80 | ||14 ||T14.1 || |
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81 | ||15 ||GND || |
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82 | ||16 ||T16.1 || |
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83 | ||17 ||T17.1 || |
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84 | ||18 ||GND || |
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85 | ||19 ||GND || |
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86 | 8 | laforge | ||20 ||T1.8 ||NIUA0 Port 0 (Tx)|| |
87 | ||21 ||T2.8 ||NIUA0 Port 0 (Rx)|| |
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88 | 1 | laforge | ||22 || || |
89 | ||23 ||T4.8 || |
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90 | ||24 ||T5.8 || |
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91 | ||25 || || |
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92 | ||27 ||T7.8 || |
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93 | ||28 ||T8.8 || |
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94 | ||29 ||T10.8 || |
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95 | ||30 ||T11.8 || |
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96 | ||31 || || |
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97 | ||32 ||T13.8 || |
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98 | ||33 ||T14.8 || |
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99 | ||34 || || |
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100 | ||35 ||T16.8 || |
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101 | ||36 ||T17.8 || |
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102 | |||
103 | == Software == |
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104 | |||
105 | === MCUF === |
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106 | 8 | laforge | There is a 20MByte Intel Series2 Flash PCMCIA card inside the MCUF. It contains software + configuration for the BTS. |
107 | |||
108 | [[Image(horizonmacro_pcmcia_iflash2.jpg, 33%)]] |
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109 | |||
110 | There once has been a mtd_iflash2.c driver for Linux 2.4.x, but apparently it has never been merged mainline before the |
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111 | big CardServices API redesign happened in 2.6.x. So unfortunately it's not straight-forward to read them out :( |
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112 | |||
113 | The MCUF is able to run without the PCMCIA card. In this case, it will download all software + config via E1 from the BSC. |
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114 | |||
115 | 9 | laforge | The MCUF has a very extensive command line interface (MMI), for more information check [wiki:Motorola_Horizon_macro/MCUF_Console] |
116 | 8 | laforge | === CTU === |
117 | It is assumed that the CTU only contains a boot loader to download the real software from the MCUF. |