EVK-M8F User Guide
UBX-15016541 - R01
Early Production Information
Device description
Page 11 of 21
For accurate measurements, it is recommended to use a cable of at most 1 meter in length. Figure 3 shows an
example of a power supply connected to the test connector by using standard adapter cables from the
manufacture Hirschmann. Figure 4 shows an example for overall current measurement. When connecting the
3.3 V digital interfaces RS232, SPI and DDC to your application, a cable length less than 25 cm is recommended.
PIN Nr. PIN NAME
I/O
LEVEL
DESCRIPTION
14
V5 IN
I
4.75 V – 5.25 V
Power input – can be used instead of USB
13
GND
I
-
Common ground pin
12
VCC
O
3.3 V
Power output – max. current supply 100 mA
1
Ω
5% resistor for over-all current measurement to pin 11
11
MODVCC
O
Second connection for over-all current measurement (see section
5
)
10
VCCRF
O
3.3 V
Filtered VCC supply output for active antennas
9
VANT
I
VCC supply input to supply an active antenna through the RF connector
(link to VCCRF with a jumper if required)
8
TIMEPULSE
O
3.3 V
Timepulse output
7
FREQ_PHASE_IN1 I
3.3 V
Frequency/phase measurement input
6
FREQ_PHASE_IN2 I
3.3 V
Frequency/phase measurement input
5
SDA2
I/O
3.3 V
If slide switch on I
2
C, then DDC interface selected; Function: data input / output
If slide switch on SPI, then SPI interface selected; Chip select input – LOW
ACTIVE
4
SCL2
I/O
3.3 V
Clock input / output
3
TXD1
O
3.3 V
UART inverted logic-level interface
2
RXD1
I/O
3.3 V
UART inverted logic-level interface
1
GND
I
-
Common ground pin
Table 5: Test connector pin description (pins numbered from right to left on the front panel)
VCC_RF and VANT pins should be fitted with jumper (as shown in front panel of Figure 2) in order to
power an active antenna. The jumper is delivered with the EVK-M8F kit as shown in Figure 2.
Figure 3: Example 5V DC power supply
GND
V5_IN
Hirschmann
Part Nr.: 934160100
V5_IN
GND
