Motorola Horizon macro » History » Version 1
laforge, 02/19/2016 10:47 PM
create page about horizon bts
1 | 1 | laforge | [[PageOutline]] |
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2 | = Motorola Horizon macro BTS= |
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3 | |||
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 | === CTU === |
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13 | |||
14 | 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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15 | DB9 serial port, as well as a SMA connector for the TX PA output. |
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16 | |||
17 | 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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18 | |||
19 | === Combiner === |
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20 | |||
21 | 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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22 | |||
23 | === MCUF === |
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24 | |||
25 | The MCUF is a full-size digital board and contains the BTS controller |
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26 | |||
27 | === NIU === |
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28 | |||
29 | 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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30 | |||
31 | === BPSM === |
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32 | |||
33 | The BPSM is a small power supply for the NIU, MCUF and other digital boards |
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34 | |||
35 | === A-bis interface === |
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36 | |||
37 | The A-bis interface is via classic E1 lines. The Horizon indoor cabinet supports up to 6 E1 ports. |
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38 | |||
39 | Each NIU module serves 1 or 2 E1 ports. |
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40 | |||
41 | The E1 ports are physically routed to the BIB (Balanced Interface Board) module on top of the cabinet. |
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42 | |||
43 | The pinout of the 37pin D-Sub connector on top of the BIB board has been reversed as: |
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44 | ||Pin ||Transformer|| |
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45 | ||1 ||T1.1 || |
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46 | ||2 ||T2.1 || |
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47 | ||3 ||GND || |
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48 | ||4 ||T4.1 || |
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49 | ||5 ||T5.1 || |
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50 | ||6 ||GND || |
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51 | ||7 ||T7.1 || |
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52 | ||8 ||T8.1 || |
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53 | ||9 ||GND || |
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54 | ||10 ||T10.1 || |
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55 | ||11 ||T11.1 || |
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56 | ||12 ||GND || |
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57 | ||13 ||T13.1 || |
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58 | ||14 ||T14.1 || |
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59 | ||15 ||GND || |
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60 | ||16 ||T16.1 || |
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61 | ||17 ||T17.1 || |
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62 | ||18 ||GND || |
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63 | ||19 ||GND || |
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64 | ||20 ||T1.8 || |
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65 | ||21 ||T2.8 || |
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66 | ||22 || || |
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67 | ||23 ||T4.8 || |
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68 | ||24 ||T5.8 || |
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69 | ||25 || || |
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70 | ||27 ||T7.8 || |
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71 | ||28 ||T8.8 || |
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72 | ||29 ||T10.8 || |
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73 | ||30 ||T11.8 || |
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74 | ||31 || || |
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75 | ||32 ||T13.8 || |
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76 | ||33 ||T14.8 || |
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77 | ||34 || || |
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78 | ||35 ||T16.8 || |
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79 | ||36 ||T17.8 || |
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80 | |||
81 | == Software == |
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82 | |||
83 | === MCUF === |
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84 | There is a 20MByte Intel Series2 Flash PCMCIA card inside the MCUF. IT contains software + configuration for the BTS. |