'''WARNING: Opening or modifying your nanoBTS will render your warranty void and might affect regulatory approval! '''

nanoBTS 1800 PCB photographs

see attachments at the end of this page.

=== 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.

nanoBTS 900

FIXME

nanoBTS 139 (1800 1st gen I guess)

see attachments for hi-res.

Image(nanobts_139_top_small.jpg)
Image(nanobts_139_bot_small.jpg)
Image(nanobts_139_digital_small.jpg)

nanoBTS 110A PCS 1900MHz

nanoBTS 110A PCS 1900MHz with 4 blown capacitors @ power supply

Image(nanobts_110a_1900_front_blown_caps_small.jpg)

nanoBTS 110A PCS 1900MHz after capacitor replacement

Image(nanobts_110a_1900_front_replaced_caps_small.jpg)

nanoBTS 110A PCS 1900MHz back

Image(nanobts_110a_1900_back_small.jpg)

nanoBTS 110A PCS 1900MHz back, detail view of area with through-hole components on PCB

Image(nanobts_110a_1900_back_detail_small.jpg)