NanoBTSInternals » History » Revision 10
Revision 9 (ahuemer, 02/19/2016 10:48 PM) → Revision 10/12 (laforge, 02/21/2016 10:39 AM)
*WARNING: Opening or modifying your nanoBTS will render your warranty void and might affect regulatory approval!* approval! * h2. nanoBTS 1800 h2. PCB photographs see attachments at the end of this page. h3. Debug Port There is a serial port for debugging. This port can be accessed via one of the two TIB RJ45 jacks, but only after a small hardware modification has been made. Please reference the following picture for details. After soldering those two connections, the pin-out of _TIB out_ is as follows: * Pin 7: PPC UART Tx (3.3V) * Pin 8: PPC UART Rx (3.3V) * Pin 10: Ground You can use any level shifter to get the signal up to true RS323 values, or directly connect something like a FT232. The port runs at 115200 bps, 8N1 There seems to be some kind of serial console on the device, we haven't yet figured out more details. h2. nanoBTS 900 FIXME h2. nanoBTS 139 (1800 1st gen I guess) see attachments for hi-res. !nanobts_139_top_small.jpg! [[Image(nanobts_139_top_small.jpg)]] !nanobts_139_bot_small.jpg! [[Image(nanobts_139_bot_small.jpg)]] !nanobts_139_digital_small.jpg! [[Image(nanobts_139_digital_small.jpg)]] h2. nanoBTS 110A PCS 1900MHz nanoBTS 110A PCS 1900MHz with 4 blown capacitors @ power supply !nanobts_110a_1900_front_blown_caps_small.jpg! [[Image(nanobts_110a_1900_front_blown_caps_small.jpg)]] nanoBTS 110A PCS 1900MHz after capacitor replacement !nanobts_110a_1900_front_replaced_caps_small.jpg! [[Image(nanobts_110a_1900_front_replaced_caps_small.jpg)]] nanoBTS 110A PCS 1900MHz back !nanobts_110a_1900_back_small.jpg! [[Image(nanobts_110a_1900_back_small.jpg)]] nanoBTS 110A PCS 1900MHz back, detail view of area with through-hole components on PCB !nanobts_110a_1900_back_detail_small.jpg! [[Image(nanobts_110a_1900_back_detail_small.jpg)]]
