EVK-M8CAM User Guide
UBX-14002462 - R07
Early Production Information
Device description
Page 10 of 24
Year produced (e.g.15 = 2015)
Month produced (e.g. 09 = September)
4.3.1
Antenna connector
An SMA female jack is available on the rear side (see Figure 2) of the EVK-M8QCAM/M8CCAM evaluation unit
for connection with external antenna signals. DC voltage at the RF input is 3.3 V. The internal short circuit
protection limits the maximum current to 60 mA.
The CAM-M8Q and CAM-M8C modules have an embedded antenna switch for switching the antenna signal
from the embedded antenna to the SMA jack, provided there is > 2 mA bias current load present at the SMA
jack (i.e. active antenna). When connecting the SMA jack with simulator signals, such a DC load current (e.g.
10 mA with a 330
Ω
load resistor) must be provided externally and decoupled from the RF-signal.
The 30 mA maximum supply current for an active antenna stays the same. This pin is also ESD protected.
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 communications and power supply.
4.3.3
UART
The evaluation unit includes an RS232 port for serial communication which is compatible with PC serial ports. In
addition to the RS232 communication port, the time pulse 1 signal is available on the DB9 connector (pin 1 or
6).
Connect using a straight RS232 serial cable with male and female connectors to the port on your PC. The
maximum cable length is 3 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
GNSS time pulse output
2
TXD, GNSS Transmit Data, serial data to DTE
3
RXD, GNSS Receive Data, serial data from DTE
4
not connected
5
GND
6
GNSS time pulse output
7-9
not connected
Table 4: SUB-D9 Connector pin description for EVK-M8QCAM/M8CCAM
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 the detailed specifications of
configurable values. Time pulse is available on the front test connector of EVK-M8QCAM/M8CCAM versions
produced August 2017 or later. Please refer to Figure 3 on how to check the production date of your EVK.
Figure 3: EVK-M8QCAM label with the production date circled in red
