9
matching
.
Ensure COM1 is connected to a PC or an external processor, users can use this
serial port to receive position data. COM1 is also necessary for firmware upgrades.
In order to obtain good performance, special concern should be paid during the design
:
Power supply: Stable and low ripple power is necessary for good performance.
Make sure the peak to peak voltage ripple does not exceed 50mV.
−
Use LDO to ensure the purity of power supply
−
Try to place LDO close to the module in layout
−
Widen the power circuit or use copper pour surface to transmit current
−
Avoid walking through any high-power or high inductance devices such as a
magnetic coil
UART interfaces: Ensure that the signals and baud rate of main equipment
match that of UM220-IV M0 module
Antenna interface: Make sure the antenna impedance matches, and the cable
is short without any kinks , try to avoid acute angles
Antenna position: In order to ensure a good signal-to-noise ratio, the antenna
should be well isolated from any electromagnetic radiation source, especially
an electromagnetic radiation in the frequency range of 1559 ~ 1605MHz
Try to avoid designing in any circuits underneath UM220-IV M0
This module is a temperature sensitive device. Dramatic changes in
temperature will result in reduced performance, so keep it away as far as
possible from any high-power high-temperature air and heating devices.
