NanoBTSInternals » History » Version 12
laforge, 02/21/2016 10:42 AM
1 | 10 | laforge | *WARNING: Opening or modifying your nanoBTS will render your warranty void and might affect regulatory approval!* |
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2 | 1 | laforge | |
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4 | 9 | ahuemer | h2. nanoBTS 1800 |
5 | 1 | laforge | |
6 | 9 | ahuemer | |
7 | h2. PCB photographs |
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8 | |||
9 | 11 | laforge | {{thumbnail(nanobts1800-front.jpg)}} |
10 | {{thumbnail(nanobts1800-back.jpg)}} |
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11 | {{thumbnail(nanobts1800-baseband.jpg)}} |
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12 | 1 | laforge | |
13 | 9 | ahuemer | h3. Debug Port |
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16 | 1 | laforge | There is a serial port for debugging. This port can be accessed via one of the two TIB RJ45 jacks, but only after |
17 | a small hardware modification has been made. Please reference the following picture for details. |
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18 | |||
19 | 12 | laforge | !{width:33%}nanobts1800-debug_port.jpg! |
20 | 1 | laforge | |
21 | 9 | ahuemer | After soldering those two connections, the pin-out of _TIB out_ is as follows: |
22 | 1 | laforge | |
23 | 9 | ahuemer | * Pin 7: PPC UART Tx (3.3V) |
24 | * Pin 8: PPC UART Rx (3.3V) |
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25 | * Pin 10: Ground |
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26 | 1 | laforge | |
27 | You can use any level shifter to get the signal up to true RS323 values, or directly connect something like a FT232. |
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28 | |||
29 | 2 | laforge | The port runs at 115200 bps, 8N1 |
30 | 1 | laforge | |
31 | There seems to be some kind of serial console on the device, we haven't yet figured out more details. |
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32 | |||
33 | 9 | ahuemer | h2. nanoBTS 900 |
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35 | |||
36 | 1 | laforge | FIXME |
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38 | |||
39 | 9 | ahuemer | h2. nanoBTS 139 (1800 1st gen I guess) |
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42 | 1 | laforge | see attachments for hi-res. |
43 | 4 | tnt | |
44 | 10 | laforge | !nanobts_139_top_small.jpg! |
45 | !nanobts_139_bot_small.jpg! |
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46 | !nanobts_139_digital_small.jpg! |
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47 | 4 | tnt | |
48 | 9 | ahuemer | |
49 | 1 | laforge | h2. nanoBTS 110A PCS 1900MHz |
50 | 9 | ahuemer | |
51 | 8 | ahuemer | |
52 | 1 | laforge | nanoBTS 110A PCS 1900MHz with 4 blown capacitors @ power supply |
53 | 8 | ahuemer | |
54 | 10 | laforge | !nanobts_110a_1900_front_blown_caps_small.jpg! |
55 | 1 | laforge | |
56 | 8 | ahuemer | nanoBTS 110A PCS 1900MHz after capacitor replacement |
57 | |||
58 | 10 | laforge | !nanobts_110a_1900_front_replaced_caps_small.jpg! |
59 | 8 | ahuemer | |
60 | nanoBTS 110A PCS 1900MHz back |
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61 | |||
62 | 10 | laforge | !nanobts_110a_1900_back_small.jpg! |
63 | 8 | ahuemer | |
64 | nanoBTS 110A PCS 1900MHz back, detail view of area with through-hole components on PCB |
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65 | |||
66 | 10 | laforge | !nanobts_110a_1900_back_detail_small.jpg! |