EVK-M8T User Guide
UBX-14041540 - R05
Device description
Page 7 of 22
Early Production Information
4
Device description
4.1
Interface connection and measurement
For connecting the EVK to a PC, use a standard SUBD-9 cable and the included Micro-USB cable.
Additional measurement equipment can be connected to the front connector.
Figure 1: Connecting the unit for power supply and communication
4.2
Active antenna
EVK-M8 evaluation kits include a GPS / GLONASS / BeiDou antenna with a 3 m cable. It is possible to
connect various active and passive GNSS antennas with SMA connectors to the evaluation unit.
The recommended maximum antenna supply current for active antennas is 30 mA.
4.3
Evaluation unit
Figure 2 shows the front and the rear panel of the EVK-M8T evaluation unit.
Front panel
Rear panel
Figure 2: EVK-M8T evaluation unit – front and rear panels
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.
The u-blox NEO-M8T module used in the EVK-M8T incorporates an additional, off-chip 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.
