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  6. Digital Broadcasting Ghost (Reflection Wave) Disturbance Countermeasure Solution

Digital Broadcasting Ghost (Reflection Wave) Disturbance Countermeasure Solution

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last updated:Apr 05, 2024

マイクロニクス
マイクロニクス
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Countermeasures against reception interference caused by ghosts in the medium electric field area!

If you have any questions regarding the introduction below, please feel free to contact us. ◆◇◆Features◆◇◆ It can perform spectrum measurements in a wide bandwidth supporting 50 kHz to 3.3 GHz. Errors due to ghost (reflected wave) interference have been reported in medium field areas around urban centers. Even if the digital broadcast terminal level is between 40 to 50 dB, it may not be received by the tuner, or block noise may occur. In this case, in addition to the general confirmation of BER/MER, it is necessary to implement countermeasures after checking the ripple drop intervals. By setting the span during measurement to 10 MHz and checking the C/N ratio, we can further narrow down the analysis and identify interference points based on the spectrum state during reception. Additionally, by using the full span function, it is possible to display the wideband spectrum from 50 kHz to 3.3 GHz on the same screen. This is the optimal tool for identifying which frequency bands are experiencing multipath or if distortion is occurring due to booster interference.

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デジタル放送ゴースト.jpg

Digital Broadcasting Ghost (Reflection Wave) Disturbance Countermeasure Solution

デジタル放送ゴースト.jpg
デジタル放送ゴースト.jpg
  • Related Link - http://www.micronix-jp.com/note/application/DTB.ht…

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◆◇◆Features◆◇◆ It can perform spectrum measurements in a wide bandwidth supporting 50 kHz to 3.3 GHz. Errors due to ghost (reflected wave) interference have been reported in the medium field areas around urban centers. Even if the digital broadcast terminal level is between 40 and 50 dB, it may not be received by the tuner or block noise may occur. In this case, in addition to the general confirmation of BER/MER, it is necessary to implement countermeasures after checking the ripple drop intervals. During measurement, confirm the C/N ratio with a span of 10 MHz, and further narrow it down to identify the points of interference in the spectrum state during reception. Additionally, by using the full span function, it is possible to display the wideband spectrum from 50 kHz to 3.3 GHz on the same screen. What frequency band is experiencing multipath? Or is there distortion caused by booster interference? This is the optimal tool for identifying these causes.

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Digital broadcasting in general / Maintenance and measurement tools

Digital broadcasting in general / Maintenance and measurement tools

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マイクロニクス

マイクロニクス

Industrial Electrical Equipment

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● An independent, purely domestic advanced development company in the high-frequency (RF) field ● One-stop development, manufacturing, sales, and service business for electronic measuring instruments, information communication devices, and environmental-related equipment ● A worldwide sales network through 18 domestic agents and 19 overseas agents

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