NWT系列扫频仪说明书-中英文版 - 图文

NWT系列数字化扫频仪

NWT SERIAL RF DIGITAL ANALYZER

使 用 说 明 书

USER MANUAL

梧桐电子 WUTONG ELECTRONIC

网 址：http://bg7tbl.taobao.com site：http://bg7tbl.taobao.com

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电 话：134 2795 9750 TEL: +86-134 2795 9750 Q Q: 1630 2767 Email: bg7tbl@126.com 版 本：V1.1 version: V1.1 日 期：2012-10-30 date:2012-10-30

翻译结果如有出入，以中文为准

Translation as a result of access, to Chinese prevail

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第一部分 总述

overview

一、特性 Character

★ 2k-3000MHz范围内快速准确测量. 2k-3000MHzrange of fast and accurate measurement ★ 动态范围: +10dBm ~ -80dBm

Dynamic range: +10dBm ~ -80dBm

★ 软件校准功能减少系统误差

Software calibration function to reduce the system error

★ 直接显示3dB,6dB,60dB带宽

Directly display 3dB, 6dB, 60dB bandwidth

★ 曲线最大最小值显示

Curves of maximum minimum value display

★ VFO输出

VFO output

★ 带功率计功能

power meter function

★ 带SWR测量

SWR measurement

★ 带阻抗测量

impedance measurement

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★ 输出带50dB衰减器

output with 50dB attenuator

★ 可打印测量曲线和数据

print measurement data and the curve

二、概述

overview

NWT系列数字化虚拟扫频仪是一台高智能化RF幅频特性分析仪。整机由MCU、RF检测、RF产生三部分组成，电路板内包含线性检测、对数检测元件，构成完整的幅频特性分析系统，可在2k~500MHz范围内快速准确测量RF器件的幅频特性。

NWT series digital virtual frequency sweeper is a high intelligent RF frequency analyzer. Machine is composed of MCU, RF detection, RF generator,the circuit board contains the linear detection, log detection, analyzing system of amplitude frequency characteristics of complete, the amplitude frequency characteristics can be fast and accurate measurement of RF devices in the 2k~500MHz range.

NWT系列数字化虚拟扫频仪的测量按人机对话方式进行，在屏幕上数字读出，还可打印出测量曲线和数据。该仪器具有自检功能，

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通过上位机和相关器件，可自校准，使到测量更加准确，带功率计算，信号发生器功能。

NWT series of digital virtual measurement scanner by way of man-machine dialogue,reading the numbers on the screen, can also print out the measurement data and the curve. The instrument has the function of self checking, through the host computerand related

devices, self calibration, so

that more

accurate

measurement, computingpower, signal generator function.

NWT系列数字化虚拟扫频仪可广泛应用于广播电视、通讯等领域。测量对象包括同轴电缆，放大器，放大模块，隔离器，滤波器，衰减器，负载，天线，分支分配器，功分器，高频头等RF器件。

NWT series digital virtual frequency sweeper can be widely used in radio and television, communications and other fields. The measuring object includes a coaxial cable, amplifier, amplifier module, separator, filter, attenuator, splitter, load, antenna,power divider, tuner RF devices.

NWT系列数字化虚拟扫频仪内部采用微波集成电路和数字集成技术，由高性能的CPU和软件组成仪器的核心，操作简单，可靠实用，是业余爱好者，RF开发人员，电视器材生产厂家，电视台，科研院所等进行RF测量的最佳选择。

NWT series digital virtual frequency sweeper with microwave integrated circuits anddigital

integration

technology, core, by the

advantages

the of

high

performance

CPU and

and

softwareinstrument has practical, amateur,RF

simple operation, reliable

developers, television equipment manufacturers, such

as television, the best choice for RF measurement research institute.

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3、 物理特特（以实物为准）

the physical characteristics (in order to prevail in kind)

外形尺寸: L*W*H=113.5*92.5*30(以实物为准)

Dimensions: L*W*H=113.5*92.5*30 (to prevail in kind)

重 量: 75g(以实物为准)

Weight: 75g (to prevail in kind)

工作温度: 0 到 +40℃

Working temperature: 0 ℃ to +40 ℃

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第三部分 安装及存贮

Installation and storage

一、 使用条件

Conditions of use

NWT系列数字化虚拟扫频仪使用USB或外接DC12V供电，需要远离强辐射（大功率开关电源，大功率射频发射）场合。

NWT series digital virtual frequency sweeper using USB or external DC12V power supply, need to keep away from strong radiation (high power switching power supply,high power RF emission).

使用温度0-40度。

0-40 degrees temperature.

二、预热

Preheat

NWT系列数字化虚拟扫频仪开机后最好能预热30分钟再进行测量。

NWT series digital virtual frequency sweeper boot after the best 30 minutes in the preheated prior to measurement.

二、 存贮 storage

清理干净NWT系列数字化虚拟扫频仪，装入有吸湿干燥剂的容器内可在环境温度-10 ~ +50℃条件下存贮。

Clean up the NWT series digital virtual frequency sweeper container, filled withdesiccant can be stored at ambient temperature -10 ~ +50 ℃.

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第四部分 使用说明 The fourth part

一， 硬件使用说明

Hardware instructions

接上DC12V,接上RS232/USB，连接对应的SMA连接线。如果是USB供电版本只需要连接USB插头即可。

其中电源接头内正外负。如果采用RS232和电脑，请采用直连线，即插电脑端插头和扫频仪端插头引脚一一对应连接即可。

其中电源插座和7805散热片中间有一跳线，可外接开关。2个SMA接口中间可外接LED做电源指示。如果是USB供电版本，插上USB口即可工作，无需开关。具体依据实物为准。

The DC12V, RS232/USB connected, connected to the SMA connector. If the power supply is USB version only need to connect the USB plug can be.

The power connector is negative. If the RS232 and the computer, please use thestraight line, plug computer terminal plug and a sweep tester end plug pin one oneconnected to.

The intermediate outlet and 7805 fins with a jumper, but external switch. 2 SMA interface between the external LED power indicator. If USB powered version, plug in the USB port can be work, no switches. According to prevail in kind.

硬件连接参考图

The hardware connection reference map

二， 软件使用说明

the software instructions

1， 软件安装，配置

software installation, configuration

1.1 安装USB驱动 Install USB driver

双击该文件，安装USB驱动 Double click install USB driver

1.2 安装WINNWT软件 Install WINNWT software

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先安装first，

再安装second

安装好WINNWT后，将快捷方式的属性进行更改，即可转换成中文版。

在安装好的软件快递方式处点鼠标右键，弹出属性项。设置属性可更改为中文版。 After installing the WINNWT, the attribute shortcuts to make changes, can be converted into the Chinese version.

In the software delivery installed at the point the right mouse button, the pop-upattributes. Set the properties can be changed to Chinese version.

运行图标的属性 Property operation Icon

将\更改为\Files\\AFU\\WinNWT4.08\\winnwt4.exe\app_cn.qm 更改完毕后，再启动，即为中文菜单。建议使用英文版

The \to \change after the start,then, is Chinese menu. Recommend the use of English version

1.3，设置COM口 Setting COM port

将USB插入电脑，如果是RS232接口的该步可省略。由于已经安装了USB驱动，在设备

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管理器中会找到对应的COM口。

Insert the USB into the computer, if the interface is RS232 this step can be omitted.Because USB is already installed driver, in the device manager will find the corresponding COM port.

设备管理器中的COM口

记住该COM7的端口号，安装驱动后，不同的电脑COM口号会不同。

点WINNWT软件的“Settings”----“Options”，选择对应的COM口号,再点“OK”。 The port number to remember the COM7, install the driver,different computer COMslogan will be different.

WINNWT software \gan, click \

选择对应的COM口 Select COM port

选择正确后，如果连机成功，会出现硬件的固件版本。否则连接或者设置有误。 Choose

the

correct, even

if successful, will

appear the

hardware firmware

version.Otherwise the connection or incorrect settings.

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选择端口正确后的提示

Select the port after correct prompt

2，对数扫频设置

Logarithmic sweep frequency settings

2.1，选择扫频模式

Select the sweep frequency mode

扫描模式选择

Select the sweep frequency mode

2.2，频率等参数设置

Set the frequency parameter

输入开始频率、结束频率、扫描点数，即可进行扫描。有2种扫描方式，一种是连续扫描，点后一直在扫描，直到点停止扫描；另一种是单独扫描，点下后，只扫描一次。不能再扫描过程中设置频率，扫描点数等参数，需要等扫描停止后才可设置。

扫描延迟用于每个点输出频率后，进行多长延迟才进行功率测量。衰减器只能在扫描过程中进行设置，停止扫描后无法设置。

Enter the start frequency, the end frequency, scanning number, can be scanned.There are 2 kinds of scanning mode, a continuous scanning, point has been scanning,until the point to stop scanning; another is the single scanning, point, only one scanning. Frequency setting cannot be scanning, scanning number and other parameters, to stop before setting.

The scan delay for each point of the output frequency, are long latency for power measurement. Attenuator can be set only in the scanning process, stop the scan could not be set.

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需要输入的数据以及部分功能

Need to input data and some functions

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进行了一单次扫描的曲线，该曲线为某21.6M滤波器曲线 A single scan curve, the curve is a curve of 21.6M filter

2.3，2倍缩放设置

2 times zoom settings

进行一次测量后，可用频率缩放功能进行放大2倍，缩小2倍，快速测量器件的频率特性。其中+键进行放大2倍的操作，-键进行缩小2倍的操作。

A measurement, the available frequency scaling functions are magnified 2 times,reduced 2 times, fast frequency response measurement device. The + button 2 times magnification operation, bond was reduced 2 times operation.

缩放功能 The scaling function

进行一次曲线扫描后，先在扫描出来的图形上点鼠标，选择缩放的频率中心点， A curve, first in the scanned graphics to point the mouse, select the center point ofthe frequency scaling,

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用鼠标左键选择缩放的中心频率

Choose the center frequency scaling with the left mouse button 用3个键进行频率缩放操作

Frequency scaling operation with 3 keys

频率缩放操作按键

Frequency scaling operation keys

+键，选择以三角标记为中心，带宽为原来一半，点后立刻进行扫描操作。 -键，选择以三角标记为中心，带宽为原来2倍，点后立刻进行扫描操作。

The + key, select the triangle as the center, the bandwidth to the half, after a scan operation immediately.

- button, choose to triangle as the center, the bandwidth is 2 times the original, after a scan operation immediately.

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开始20M，结束25M，测量21.6M BPF的曲线

Start 20M, the end of 25M, measurement of 21.6M BPF curve

将图标放在曲线峰顶，按一次+的结果

The icon on the curve peak, according to a + results

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将曲线放在峰顶，按2次+的结果

The curve on the summit, according to 2 + results

将曲线放在峰顶，按2次-的结果

The curve on the summit, according to 2 - results

如果有多个图标，选择以当前坐标为中心进行缩放操作。

If there is more than one icon, select the coordinates for the center of scaling

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operation.

2.4，频率标记设置

the frequency tag set

选择curse#中的1,2,3,4,5，每选择一个，就在显示图形上点一下鼠标左键，则图形区会显示一个倒三角的标记，在文本区，会显示对应的标记频率、幅度。该标记为频率标记。在图形上点右键，可删除单个或全部标记。

Select 1,2,3,4,5 curse#, select each, on display graphics click the left mouse button,the graphics area will display marked a inverted triangle, in the text area, will display the mark frequency, amplitude corresponding. The marked frequency marker. Right click on the graph, delete the single or all markers.

选择1-5号图标 Select the 1-5 Icon

显示的倒三角标记

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Inverted triangle mark displayed

屏幕显示的5个频标频率，信号强度

Frequency the frequency of 5 screen display, signal strength

2.5，Y轴缩放功能

Y axis scaling function

其中Ymax选择屏幕曲线最高位置显示的信号强度，一般选择20 Ymin选择屏幕曲线最低位置显示的信号强度，一般选择-90，

The Ymax signal intensity curve highest position display screen, the general selection 20

Ymin selection signal intensity curve shows the lowest position screen, generally choose -90,

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Y轴缩放功能 Y axis scaling function

利用该功能对曲线进行缩放，比如曲线在0dBM到-20dBm段显示不够清晰，可以选择Ymax为0，Ymin为-20进行缩放。注意，由于MCU的AD分辨率有限，放大后，曲线可能会出现阶梯的情况。

The scaling of the function, such as the curve in 0dBM to the -20dBm segment display is not clear, can choose Ymax for 0, Ymin for the -20 scaling. Note that,because of the limited resolution of MCU amplification of AD, post, curve may appearladder situation.

选择Ymax=20,Ymin=-90 Select Ymax=20, Ymin=-90

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选择Ymax=10,Ymin=-30 Select Ymax=10, Ymin=-30

2.6带宽显示

bandwidth display

测量出来的曲线，可直接显示3dB带宽、Q值、6dB带宽、60dB带宽和矩形系数 The measured curve, can directly display the 3dB bandwidth, Q value, 6dB bandwidth, 60dB bandwidth and rectangular coefficient

带宽选择 Bandwidth selection

3dB/Q打勾后，软件中会显示出测量的曲线3dB带宽和Q值

3dB/Q tick, the software will display the measured curve 3dB bandwidth and Q value

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测量的曲线 The measured curve

显示的3dB带宽，Q值和相关参数

Display 3dB bandwidth, Q value and related parameters

6dB带宽,60dB,带宽，矩形系数也是同样道理

Markerlines用于在图形区显示带宽相关的虚线，更易识别带宽参数。 Inverse用于陷波器测量。

6dB bandwidth, 60dB, bandwidth, is similarly rectangular coefficient

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Markerlines is used to display the dotted line bandwidth related in the graphics area, more recognition bandwidth parameter.

Inverse is used to trap measurement.

2.7，多曲线显示

Multi curve display

测量完毕后，可通过图形管理区存储，显示曲线。

先点Graphae-Manager选择图形管理存储区。通过 Get获得当前屏幕曲线；Actibe channel打勾，选择相应的通道；Show Graph 打勾，显示当前的曲线

After measurement, by storing graphic management area, shows the curve. The first point of Graphae-Manager graphics memory area management.Get the current screen curve by Get; Actibe channel tick, select the corresponding channel; Show Graph tick, displays the current curve

图形管理区 Graph manage

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图形区管理区选择了3个图形

Management pattern area selected 3 graph

图形区显示了3条曲线

Diagram shows 3 Curves

3，线性扫描设置

Linear scan settings

线性探头的灵敏度远比对数探头要低，动态范围也不大。

The sensitivity of linear probe is far lower than the logarithmic probe,dynamic range is

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small.

3.1，如何选择线形探头 Select line detetor

点 “Sweep” ---“Select Channel 1” Click “Sweep” ---“Select Channel 1”

选择通道1 Select channel 1

选择“defsonde1lin.hfm”文件，即选择线性扫描方式。如果选择defsonde1.hfm则是选择对数扫描方式

Select the \selection of log scan mode

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对数、线性文件选取

Logarithmic, linear file selection

3.2，其他设置 Other setting

开始频率，结束频率，扫描点数，衰减器等参数设置和对数扫描一样进行设置。 对数扫描的动态范围比较大，线性扫描的动态范围比较小。以下为对数扫描和线性扫描的曲线对比

Start frequency, the end frequency scan points, attenuator, parameter setting and logarithmic sweep as set.

Dynamic range logarithmic sweep is relatively large, relatively small dynamic range linear scanning. The contrast curve of logarithmic sweep and linearscanning

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对数线性扫描曲线对比

Comparison of log linear scanning curve

4，驻波比(SWR)测量 SWR measure

4.1，进入测量模式 Enter swr mode

连接好驻波电桥。电桥输入接NWT扫频仪RF输出，电桥输出接NWT扫频仪RF输入， 选择SWR测量模式。

Connect the bridge. The bridge input is connected to the NWT scanner RF output, the bridge output is connected with the NWT input frequency sweep meter RF, Select the SWR measurement mode

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测量模式选择

Test mode select

4.2，频率设置 Frequency setting

频率设置和对数扫描模式相同。输入开始频率，结束频率，点数，点连续或单次测量即可，直接读出SWR。需要校准后测量才准确。

图片是测量某U低天线的曲线，可以看出，谐振点在430M左右，驻波约1.1，相应的曲线极限数值可以从文本区读出。

Set the frequency and log the same scanning pattern. Enter the start endpoints, frequency, frequency, continuous or single measurement can be read directly, SWR. The need for calibration of measuring is accurate.

The picture is a measure of a U low antenna curve, can be seen, the resonant point at about 430M, standing about 1.1, the limit value curvecorresponding to read from a text area.

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测量出来的天线曲线

The measured antenna curve

文本区显示的驻波最大，最小值

The text area shows the standing wave maximum, minimum

5，带电缆的天线驻波比测量

Antenna measurement with cable in Bobbi

5.1进入测量模式

Enter the measurement model

选择SWR_Ant,即可进入带电缆的天线驻波比测量。注意，该模式不用连接

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天线的电缆，和SWR的测量连接方式一样，只是用软件估算连接电缆后的驻波比。

Select the SWR_Ant, you can enter the antenna measurement with cable in Bobbi. Note, this mode without cable to connect the antenna, measurement and SWR connection, just using the software estimation in Bobbi after the cable is connected.

选择模式 Select mode

5.2，频率设置 Frequency setting

频率设置和SWR模式相同。其中还需要输入100m长的电缆衰减量以及电缆长度。 Set the frequency and SWR models with the same. There is still the need toenter the 100m long cable attenuation and cable length

5.3，测量曲线

Measuring curve

设置好电缆参数

Setting the cable parameters

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某U低天线曲线，红色为测量曲线，蓝色为接入电缆曲线

A low U antenna for measuring curve curve, red, blue for access to cablecurve

6，阻抗测量

Impedance measurements

需要使用驻波电桥进行阻抗测量，测量时候，在电桥DUT端串入一个50欧姆的电阻。

Need to use the bridge to measure the impedance, measurement time,resistance in the bridge end DUT string into a 50 ohm.

6.1 SWR校准（如果已经校准该步省略）

SWR calibration (if you have omitted the step calibration)

进行SWR校准，详见12节SWR校准，如果不校准，测出来的阻抗不准确。

The SWR calibration, see section 12 SWR calibration, if not calibrated,impedance measurement is not accurate.

6.2 选择阻抗测量

Selection of impedance measurement

校准完毕后，选择阻抗测量模式

After calibration, select the impedance measurement model

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选择阻抗测量模式

Selection of impedance measurement model

选择完毕后会出现提示，不用理会。

After selection will be prompted, ignore.

6.2进行测量，从图上直接读出阻抗数值

Measurement, read directly from the chart impedance values

测量时候，需要在电桥DUT端串一个50欧电阻。

Measurement of time series, a 50 ohm resistor in bridge DUT need.

测量65欧电阻曲线

Measurement of 65 European resistance curve

7，测量器件连接方法

Measuring device connection method

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7.1，滤波器测方法1

Filter test method 1

如下图，适合滤波器输入输出阻抗均为50欧的情况，如果滤波器阻抗不匹配，用该法测量容易造成带宽错误，通带内波动大等测量不准确的情况。

The following diagram, suitable for the filter input and output impedance is 50 euro, if the filter impedance mismatch, the measurements are prone to errorin passband bandwidth, the big fluctuation of inaccurate measurement

of.

方法1，适合滤波输入输出阻抗为50欧的情况

Methods 1, suitable for filtering the input and outputimpedance of 50

ohm situation

7.2，滤波器测方法2

Filter test method 2

如果滤波器阻抗不对，需要进行阻抗匹配。可用变压器进行匹配。匹配后，滤波器的曲线测量才准确。

还可以用电阻进行匹配，该匹配方式插损非常大。

If the filter does not need the impedance, impedance matching. To match the available transformer. After matching, curve measurement filter was accurate.

Can also use the resistance matching, the matching method of insertion lossis very large.

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进行阻抗匹配的方法，该方法可测量插损

Method of impedance matching, this method can measure the insertion loss

7.3，中周测量方法1

Rf transformer measurement method 1

中周测量方法1

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Rf transformer measurement method 1

7.4，中周测量方法2

Rf transformer measurement method 2

中周测量方法2

Rf transformer measurement method 2

7.5，天线测量方法

Antenna measurement method

NWT系列扫频仪如果需要测量天线，需要在外附加一电桥，该电桥参考电路如下： NWT series frequency sweep meter if you need additional measuring antenna, a bridge on the bridge, a reference circuit are as follows:

驻波电桥原理图

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