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发布时间: 2018 - 10 - 10
噪声是电子电路的特性之一它会导致发射机和接收机之间有用信息的随机干扰会影响无线系统的整体性能信号/频谱分析仪是宽带接收机内部噪声会影响极低幅度信号的测量如何解决呢?今天我们为大家带来解决方案帮助大家提高小信号测量的灵敏度和精度尤其针对噪声附近的信号得益于是德科技 X 系列信号分析仪新增加的测量迹线设置表功能让实验更快的达到测量目的图 1:调整分析仪的设置,可以改善该仪器的本底噪声减小分辨率带宽当分辨率带宽从100 kHz 减少至 10 kHz 时,图 1 中 蓝色迹线 的本底噪声降低了 10 dB。 通过这种技巧可以进一步降低本底噪声。减小频谱仪的衰减通过手动的方式,将分析仪的输入衰减器下调至 0 dB,图 1 中的 红色迹线 显示了设置为 0 dB 衰减后,改善的本底噪声。使用前置放大器配置前置放大器,如图 1 中 绿色迹线 所示,前置放大器改善了系统的噪声系数,降低了本底噪声。是德科技 X 系列信号分析仪具备本底噪声扩展(NFE)功能可以提高分析仪的灵敏度打开NFE,剔除频谱仪自身的噪声NFE 能够识别电流仪表状态信号中的噪声,并可以自动将其从实时频谱结果的测量中删去。图1 中的 红色迹线 显示,应用 NFE 进行测量,可以使本底噪声额外降低8dB。NFE 将有效本底噪声改善了 10 dB使用“过扫描”功能加速扫描使用全数字中频“过扫描”技巧能够显示数字分辨率带宽响应的特点,并纠正这些错误,从而获得更快的扫描速率,取决于特定的设置,扫描时间可以从秒级缩短到毫秒级。“过扫描”对分辨率带宽滤波器产生的影响
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产品 Products
产品名称:

4420A 射频录制仪

上市日期: 2016-04-12

- 450 kHz to 1000 MHz(3GHz option) range

  • 产品概述
  • 产品规格
  • 详细参数

4420A 射频录制仪

 

This device can record an RF signal in the fields and the recorded data can be taken out. Then , they can be reproduced in factories or laboratories. Therefore, operations of receivers can be confirmed under the receiving condition that is as same as the fields.

 

- The device is designed as compact size and light weight and equips the record part and the reproduction part. (A PC for the control and SSD or HDD in RAID configuration are needed other than the main body ) Features (A PC for the control and SSD or HDD in RAID configuration are needed other than the main body.) - This device can be used under DC +12 V when using the DC-DC adaptor of the option. (Prepare external batteries separately.)

- This device corresponds to the frequency in the range from 450 kHz to 1000 MHz. (The frequency in the range from 50kHz to 30MHz and from 1000MHz to 3000MHz is possible by carrying the option.)

- The frequency band can be chosen from “8 MHz”, “24 MHz”, “40 MHz” or “54 MHz”. (In the cases of “40 MHz” and “54 MHz”, only the half rate mode can be used.) (*2)

- If the 6TByte HDD of the option is used, the recording time of the 8 MHz band is 36 hours.

- This device is controlled from the PC The user interface provides excellen This device is controlled from the PC. The user interface provides excellent operability and visibility operability and visibility.

- The spectrum can be displayed. Therefore, the signal can be recorded while the spectrum is confirmed. - A Low Noise Amplifier is equipped for the RF input. Therefore, this device corresponds to the weak electric field.

- The Auto Cal function that sets the level at the recording automatically when the RF signal is captured is equipped.

- The time and the location information can be buried into the recorded data, when using the GPS antenna of the option. Therefore, the recording route and the signal level at the points can be displayed on the map, if the dedicated software is used.

- This device can share existing data captured by existing devices. Therefore, old data can be used effectively.

- This device sets the frequency and the level at the recording automaticall This device sets the frequency and the level at the recording automatically when reproducing the data. when reproducing the data.

- This device equips the inversion function of the polarity at the reproduction.

- This device can reproduce data of A74 standard in ATSC.

 

 

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- 8 /24 /40 /54 MHz frequency band

- 450 kHz to 1000 MHz(3GHz option) range

相关产品 / Products More
  • 发布时间: 2018 - 04 - 11
  • 发布时间: 2016 - 04 - 12
    4420A 射频录制仪 This device can record an RF signal in the fields and the recorded data can be taken out. Then ,they can be reproduced in factories or laboratories. Therefore, operations of receivers can beconfirmed under the receiving condition that is as same as the fields. - The device is designed as compact size and light weight and equips the record part and the reproduction part.(A PC for the control and SSD or HDD in RAID configuration are needed other than the main body )Features(A PC for the control and SSD or HDD in RAID configuration are needed other than the main body.)- This...
  • 发布时间: 2016 - 04 - 08
    4417A 射频录制仪  This device can record RF signals in various points of fields. When reproducing the signal data in factoriesor laboratories, it is possible to test receivers under the reception environment of the data.  - Compact size and all-in-one model. The recording part and the reproduction part are equipped to one body.(Approx 15 kg)- The frequency range covers 30MHz to 3000 MHz of the recording frequency, so that this device can record andreproduce an RF signal of all terrestrial broadcast and all satellite broadcast in the world.- 8 MHz, 24 MHz, 40 MHz and 54 MHz bandw...
  • 发布时间: 2016 - 04 - 08
    4416A 射频录制仪  This device can record RF signals in various points of fields. When reproducing the signal data infactories or laboratories, it is possible to test receivers under the reception environment of the data. Features: - Compact size and all-in-one model.(Weight:Approx.8 kg)- This device adapts to DC +12 V input.- The frequency range covers 30MHz to 1002MHz of the recording frequency.- 8 MHz bandwidth RF signal can be recorded/reproduced.In addition, when using the option, 24MHz bandwidth and 40MHz bandwidth RF signal can berecorded/reproduced.- 7-inch wide type VGA ...
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