FCC T7B - 电台设备与故障排查

#T7B01🔗

What can you do if you are told your FM handheld or mobile transceiver is over-deviating?

如果您被告知您的 FM 手持或移动收发器声音过载，您该怎么办？

Talk louder into the microphone

对着麦克风大声说话

Let the transceiver cool off

让对讲机冷却

Change to a higher power level

更改为更高的功率级别

Talk farther away from the microphone

离麦克风远一点说话

✓ 正确答案

#T7B02🔗

What would cause a broadcast AM or FM radio to receive an amateur radio transmission unintentionally?

什么会导致广播 AM 或 FM 收音机无意中接收业余无线电传输？

The receiver is unable to reject strong signals outside the AM or FM band

接收器无法拒绝AM 或 FM波段以外的强信号

✓ 正确答案

The microphone gain of the transmitter is turned up too high

发射器的麦克风增益调得太高

The audio amplifier of the transmitter is overloaded

发射机的音频放大器过载

The deviation of an FM transmitter is set too low

调频发射机的偏差设置得太低

#T7B03🔗

Which of the following can cause radio frequency interference?

以下哪项会引起射频干扰？

Fundamental overload

基本过载

Harmonics

谐波

Spurious emissions

杂散发射

All these choices are correct

这些选项都是正确的

✓ 正确答案

#T7B04🔗

Which of the following might be the cause of low RF power output from a solid-state transceiver?

以下哪一项可能是固态收发器射频功率输出低的原因？

Poor amplifier noise figure

放大器噪声系数较差

Poor amplifier linearity

放大器线性度差

Low SWR

低驻波比

High SWR

高驻波比

✓ 正确答案

#T7B05🔗

Which of the following might reduce interference by an amateur station to a non-amateur over-the-air radio receiver?

以下哪一项可以减少业余电台对非业余无线电接收机的干扰？

Block the amateur signal with a filter at the antenna input of the affected receiver

在受影响接收器的天线输入端使用滤波器阻止业余信号

✓ 正确答案

Block the interfering signal with a filter on the amateur transmitter

用业余发射机上的滤波器阻挡干扰信号

Switch the transmitter from FM to SSB

将发射机从 FM 切换到 SSB

Switch the transmitter to a narrow-band mode

将发射机切换到窄带模式

#T7B06🔗

Which of the following actions should you take if a neighbor tells you that your station’s transmissions are interfering with their radio or TV reception?

如果邻居告诉您您电台的传输正在干扰他们的广播或电视接收，您应该采取以下哪项行动？

Make sure that your station is functioning properly and that it does not cause interference to your own radio or television when it is tuned to the same channel

确保您的电台工作正常，并且在调到同一频道时不会对您自己的收音机或电视造成干扰

✓ 正确答案

Immediately turn off your transmitter and contact the nearest FCC office for assistance

立即关闭发射器并联系最近的 FCC 办公室寻求帮助

Install a harmonic doubler on the output of your transmitter and tune it until the interference is eliminated

在发射机的输出端安装谐波倍增器并对其进行调谐，直到消除干扰

All these choices are correct

这些选项都是正确的

#T7B07🔗

Which of the following can reduce interference to a 2-meter band transceiver from a nearby commercial FM station?

以下哪一项可以减少附近商业 FM 电台对 2 米波段收发器的干扰？

Installing an RF preamplifier

安装射频前置放大器

Using double-shielded coaxial cable

使用双屏蔽同轴电缆

Installing bypass capacitors on the microphone cable

在麦克风电缆上安装旁路电容器

Installing a band - reject filter

安装带阻滤波器_

✓ 正确答案

#T7B08🔗

What should you do if something in a neighbor’s home is causing harmful interference to your amateur station?

如果邻居家里的东西对您的业余电台造成有害干扰，您应该怎么办？

Work with your neighbor to identify the offending device

与您的邻居一起识别违规设备

Politely inform your neighbor that FCC rules prohibit the use of devices that cause interference

礼貌地告知您的邻居 FCC 规则禁止使用会造成干扰的设备

Make sure your station meets the standards of good amateur practice

确保您的电台符合良好业余实践的标准

All these choices are correct

这些选项都是正确的

✓ 正确答案

#T7B09🔗

What should be the first step to resolve non-fiber optic cable TV interference caused by your amateur radio transmission?

解决业余无线电传输引起的非光纤有线电视干扰的第一步应该是什么？

Add a low-pass filter to the TV antenna input

为电视天线输入添加一个低通滤波器

Add a high-pass filter to the TV antenna input

为电视天线输入添加高通滤波器

Add a preamplifier to the TV antenna input

在电视天线输入端添加前置放大器

Be sure all TV feed line coaxial connectors are installed properly

确保所有电视馈线同轴连接器安装正确

✓ 正确答案

#T7B10🔗

What might be a problem if you receive a report that your audio signal through an FM repeater is distorted or unintelligible?

如果您收到报告说通过 FM 中继器的音频信号失真或无法理解，这可能是什么问题？

Your transmitter is slightly off frequency

您的发射机稍微偏频

You are speaking too loudly or too close to the microphone

您说话声音太大或离麦克风太近

You are in a bad location

你在一个糟糕的位置

All these choices are correct

这些选项都是正确的

✓ 正确答案

#T7B11🔗

Which of the following can eliminate distorted voice transmissions?

以下哪项可以消除失真的语音传输？

Adding extra feedline to the antenna to lower SWR

向天线添加额外的馈线以降低 SWR

Turning the radio on and off to reset the computer-controlled circuitry

打开和关闭收音机以重置计算机控制电路

Adding a clip -on ferrite “ choke ” to the microphone cable to prevent the transmitted signal from feeding back into the transmitter

在麦克风电缆上添加夹式铁氧体“扼流圈”，以防止传输的信号反馈到发射器中

✓ 正确答案

Turning the squelch control fully clockwise to prevent the transmitted signal from triggering the squelch circuit

将静噪控制器顺时针旋转到底，以防止传输信号触发静噪电路

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FCC T7B - 电台设备与故障排查

小节 T7B：电台设备与故障排查