SX1302 LoRaWan Gateway Module LoRaWan1302 Transmit Power Test

By sdga:NiceRF Wireless Technology Co., Ltd

NiceRF: How to test the transmit power of SX1302LoRaWan gateway module LoRaWan1302

1. SX1302 LoRaWan Gateway Module LoRaWan1302(433MHz) to be tested

2. Test Tools & Instruments

Frequency spectrograph, DC power supply, electrostatic bracelet, ammeter, product function test rack

DC power supply

Product function test rack -- place the LoRaWan gateway module LoRaWan1302 in the fixture of the test rack in the correct direction

Spectrum analysis

3. Test indicators

3.1 Working voltage: DC5V

3.2 Transmitter power: > 29dBm

3.3 Center frequency error: < 1KHz

3.4 Emission current: < 2000mA

4. SX1302 LoRaWan Gateway Module LoRaWan1302 test process

4.1 Wear an electrostatic bracelet and set the power supply voltage at 5V.

Wear an electrostatic bracelet and set the power supply voltage at 5V.

4.2 Set the central frequency point of the frequency spectrograph as working frequency point of the module to be tested. See the LCD display for the specific frequency point.

Set the frequency of the demo board to be consistent with the module to be tested, and connect the display and hand mark.

For example, 433MHz module, the parameter settings are shown in the following figure:

Band: 433M

PA: 9

mode: TX

Set the frequency of the demo board to be consistent with the module to be tested

See the table below for specific frequency parameters:

Operating frequency range	Setting frequency point	Setting bandwidth	Emission current(mA)	Transmitting power(dBm)
433MHz	433.175MHz	135KHz	<2000	>29
470MHz	490.525MHz	135KHz	<2000	>29
868MHz	868.525MHz	135KHz	<2000	>29
915MHz	925.525MHz	135KHz	<2000	>29

4.3 Put the module into the test fixture in the correct direction. When powered on, the GPO-GP4 light on the test rack shall be on for one second and then off, and press the run key of the test rack. The frequency spectrograph shall display the power higher than 29dBm and the frequency within the range, as shown in the figure below:

4.4 During communication test, the blue light on the receiving board should flash.

During communication test, the blue light on the receiving board should flash.

4.5 Only when the tests in above 4.3 and 4.4 are both normal, the product is qualified.

5. SX1302 LoRaWan Gateway Module LoRaWan1302 attention:

The power connection between DC power supply and test fixture should not be reversed, and the DC power supply voltage shouldnot be adjusted arbitrarily after setting.

LoRaWan Gateway Module LoRaWan1302 spectrum analyzer parameters cannot be changed after setting.

All power supply instruments shouldbe reliably grounded.

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