Ble Scan RX power db问题

ATM的TRM不让我从柏树网站下载它，但我稍后再试。在猜测中，它将是在1.5分贝、3分贝或6分贝（3分贝是双）的某个地方。



     以下为原文
  Atm the TRM isn't letting me download it from the Cypress site, but I'll try again later. At a guess, it would be somewhere on the order of 1.5 dB, 3 dB, or 6 dB (3 dB is double).

在TRM中，页面347指的是101的LNA增益设置为66分贝，并且在该设置级别的增加电流的代价下，将灵敏度提高2-3分贝（听起来像它将在其他级别提升它，几乎没有影响）。
最高的是66分贝，最低是0分贝，我会看到步骤为13.2分贝。



     以下为原文
  Looking in the TRM, page 347 refers to the LNA gain setting of 101 being 66 dB, and the potential to boost the sensitivity by 2-3 dB at the expense of increased current at that setting level (sounds like it will boost it at other levels with little-to-no effect.)
With the highest being 66 dB, and the lowest being 0 dB, I would see the steps as 13.2 dB

我在下面的链接中看到了组件文档。
（HTTP://www. CyPress）/DooptTys/CaseDeaSeTeSs/PSoC-CaltoReal-组件数据表-BootoSt-低能量BLE）
在P84中，我看到了函数“CyByth-SrrxgGaNeMyType”。
在函数描述中，“CyByByBelsHyg-GAIN模式”设置被称为-91dB。
减去DB和PLUS DB之间的区别是什么？
LNA增益和CyLySyxGrGAIN模式设置是如何匹配的？



     以下为原文
  I saw the component document at the link below.
(http://www.cypress.com/documentation/component-datasheets/psoc-creator-component-datasheet-bluetooth-low-energy-ble )
 
 
 
 
In p84, I saw the function "CyBle_SetRxGainMode"
In the function description, the "CYBLE_BLESS_HIGH_GAIN_MODE" setting is called -91dB.
What is the difference between minus db and plus db?
And how does the LNA Gain and CyBle_SetRxGainMode settings match?

正dB是较强的信号；负dB在信号强度上是相同的比例变化，但它反而减弱了信号强度。
正常VS高增益模式相差2dB差值，这大约是信号接收灵敏度的1.6倍。
无线电列表-作为默认RX灵敏度的89分贝，因为这是来自正确增益的单位增益发射机的信号的分数功率。例如，在到达接收机之前，在1 W/m ^ 3处发射的无线电将在接收机的信号强度下降89分贝时接收，这个DB值对应于需要的信号强度的0.0000000126 W/m ^ 3。（这是一个粗略的计算，但它演示了数学和概念相当好。）
不知道LNA如何与CyByLyStRxGangMeDeNe（）函数匹配，但它可以是TRM和CyPress函数之间的区别，它将TRM中找到的设置设置为每个设置/模式的特定配置。



     以下为原文
  Positive dB is a stronger signal; Negative dB is the same proportional change in signal strength, but it is decreased signal strength instead.
The Normal vs High Gain modes differ by the 2dB difference, which is a roughly 1.6~ times increase in signal reception sensitivity.
The radio lists -89 dB as the default RX sensitivity as that is the fractional power of a signal from a unity-gain transmitter that can be correctly received. For example, a radio transmitting at 1 W/m^3 would be receivable by the receiver at a -89 dB drop in signal strength before reaching the receiver, this dB value corresponds to 0.0000000126 W/m^3 of signal strength needed to function. (This is a rough calculation, but it demonstrates the math and concept pretty well.)
No idea how the LNA Gain matches to the CyBle_SetRxGainMode() function, but it could be a difference between the TRM and the cypress function that sets the settings found in the TRM to specific configurations for each setting/mode.