EVK-7 / EVK-8 / EVK-M8 User Guide
UBX-14002502 - R10
Early Production Information
Device description
Page 9 of 25
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”.
