2018.5.31 nRF905 test

1 试电机：自动控制测试流程（Labview程序，加载扫描仪，自动测试夹具，测试数据保存）

2 USB RF收发器： 含S/N码发送读取功能（S/N：）

The specific use please reference to the manual of application.

3 频谱仪：检测产品发出的RF数据（频偏，功率，谐波）

      A Setting ： frequency and Spam

Turn on the Spectrum Analyser, and set it to check with display set to centre at 868,4MHz

and a span of e.g. 3MHz.

     B Check that the signal power is «strong enough».

A strong enough signal is not easy to define precisely. This is because it depends on a lot of
factors, such as the distance of measurement, the antenna on the spectrum analyser, the angle of
the antenna on the spectrum analyser, the angle of the control unit’s antenna related to the other
antenna, the room/shielded space the measurement is performed in, etc.
We suggest that you make a reference measurement in your test setup with a control unit with radio
 board that you know works ok, and then use this reference
(measured in dBm) as the standard that the measured radio signal must match to pass the test. To
know that your reference card is ok, you can e.g. test radio communication with this over a certain
distance (e.g. 20 meters in free air).

4 Radio setup for RF signal generator:

Here is how we set up the configuration register of the radio chip nRF905,

1. The RX being tested will listen at address 254 254 254 254.

2. CRC is enabled, CRC_MODE = 1 (16 CRC check bit).

Setting     Value
CH_NO    118        
HFREQ_  PLL 1
PA_PWR 3
RX_RED_PWR 0
AUTO_RETRAN 0
RX_AFW 4
TX_AFW 4
RX_PW 32
TX_PW 32
RX_ADDRESS 254 254 254 254
UP_CLK_FREQ 0
UP_CLK_EN 0
XOF 3
CRC_EN 1
CRC_MODE 1

5  PC：  Connected with test device .

The following software must be installed:
1. Python 3.4 ( For auto-test)
2. Device programming and testing software (AVR 6.1  , NET 4.0 and USB Driving ）

3 Laview  and  environment

6 Scanister：Created S/N

The tool confirms the serial number of the produced, in addition to reading out production date and
software version number. and  all will have a unique serial number printed on the plastic/a

sticker on the plastic. This serial number must also be configured into the device after programming.
The serial number consists of four bytes, in the format XXX XXX XXX XXX, where each group of
three digits XXX have values from 000 to 255. One serial number can for example be "132 000 000
001". The serial number is used for addressing all radio traffic between devices.