The board has a built-in micro USB interface which can be used for both power supply and high speed data transfer. Connected to a computer can communicate with u-center: the u-blox GPS evaluation software for Windows.
In order to power the module via USB, the jumper located on the side of the board must be closed. The board can also be powered providing 3.3V (jumper must be open) and controlled by using the UART (Tx, Rx) or I2C (SDA, SCL) breakout pins. It works great with the NeoGPS library for arduino.
There are two status LEDs: the green one indicates the power status, the blue one indicates the PPS. It starts to blink once the GPS has a valid fix.
The board contains an SMA antenna connector and a battery holder for hot module start to achieve a minimal time to first fix after a power down.
Please note that the design of the PCB is not optimal, in particular the RF trace coming from the antenna - as stated in the u-blox integration manual (page 85) - "must be shielded by vias to ground along the entire length of the trace". Also, the RF trace impedence was not calculated correctly and some other design mistakes. I will improve the design in a future version, but despite these mistakes the board works fine, please watch the cold start test for a demonstration.
I have tested the board with the following two antennas: