EVK-7 / EVK-8 / EVK-M8 User Guide
UBX-14002502 - R09
Early Production Information
Device description
Page 11 of 28
4.3.1
Antenna connector
An SMA female jack is available on the front side (see Figure 2) of the evaluation unit for connecting an active or
passive antenna. DC voltage at the RF input is 3.3 V. The internal short circuit protection limits the maximum
current to 60 mA. Please note that the 30 mA maximum supply current for active antenna stays the same. This
pin is also ESD protected.
To avoid the damage of RF input caused by ESD or Electrical Overstress, and to seek maximum consistency and
repeatability of performance independently of the RF component used, all EVK-7, EVK-8 and EVK-M8 have an
onboard LNA.
The connector is only to be used with a GNSS antenna or simulator. Do not connect this
equipment to cable distribution systems.
4.3.2
USB
A USB V2.0 compatible serial port is featured for data communication and power supply.
4.3.3
UART
The evaluation unit includes an RS232 port for serial communication that is compatible with PC serial ports.
Connect using a straight RS232 serial cable with male and female connectors to the port on your PC. The
maximum cable length is < 3.0 meters. To configure the RS232 port, use the CFG-PRT command in the u-center
application. The maximum operating baud rate is 921.6 kBd.
If you are using a USB to RS232 adaptor cable, you can connect it directly to the evaluation kit RS232 port.
The 9-pin D-SUB female connector is assigned as listed in Table 4:
Pin Nr.
Assignment
1
not connected
2
TXD, GNSS Transmit Data, serial data to DTE
3
RXD, GNSS Receive Data, serial data from DTE
4
not connected
5
GND
6
not connected
7-9
not connected
Table 4: SUB-D9 Connector pin description for EVK-7 / EVK-8 / EVK-M8
4.3.4
Time Pulse
u-blox receivers include a time pulse function providing clock pulses with a configurable pulse period, pulse
length and polarity (rising or falling edge). Check the product data sheet for detailed specifications of
configurable values.
In the latest EVK-8N and EVK-M8 versions of the evaluation unit, the time pulse signal is connected to the LED
on the front panel of the unit and also to the Test Connector. The “TIMEPULSE” text on the evaluation unit label
indicates this (see Figure 3). In older versions of the evaluation unit, the time pulse signal is not available in the
Test Connector, and the label shows the corresponding pin to be “RESERVED0”.
Figure 3: EVK Label
