已经考过a，验机了，正在等呼号分配，一直有个问题挺迷茫的，现在电磁环境差，干扰严重，手台基本上借助中继通信，而中继大多都是本地中继，里面好像都是本地的，那么请问手台如何通联外市或者外省呢？如果直接发射应该传不了多远，如果连中继，中继好像都是本地的，求教如何通联外市外省？

UV段基本本地，可以上卫星，或者用MMDVM，同样新手，在网上了解的两个方法

打卫星，mmdvm，或者哪天试试能不连隔壁市县的中继，传播好的话几百公里都有可能通联到

uv段其实高度是个很重要的点能往高处走的话也能通的远一点

电磁环境差对 UV 设备干扰不如短波严重。一句话：站得高通的远。

首先 UV是目视传播站得高总是没错的另外，想靠手台的话功率确实低了最后，你说的干扰在UV显得微不足道了除非有同频用UV设备的电磁干扰严重主要体现在HF频段上

感谢大佬们的解答，另外我还有个问题，就是现在我的交流只在本地中继听过，如果我想找其他频道是否存在人交流是不是使用扫描功能？（说明书的描述是扫描到载波信号后停止扫描）

@"qaqa_117"#p2851 感觉用扫描的话不太容易，在扫描的时候刚好有ham在交流才能扫到，但基本上能扫到的都是塔吊😂，UV段的话基本都是中继，卫星，个人感觉直频通联的少，可能有一些常用频段会有ham在守听（网上看到438.500），短波机有频谱图用扫频会直观一点，手持机扫频感觉是要扫个寂寞的，我只扫到过一回ham的通联，其他全是塔吊

整个SDR吧看频谱效率要高一些

找高楼，或者上山顶，能上多高上多高，实在不行上卫星。

加中国卫星QQ群：95339567

Newcomers are just getting started, and I need some guidance on how to use repeaters.

qaqa_117

I have already passed the A exam and completed testing. I am now waiting for a channel to be assigned. However, I'm experiencing some confusion and uncertainty. The current electromagnetic environment is poor with significant interference. My handheld radio primarily relies on relay communication, but most relays are local. So, how can my handheld radio connect to external cities or provinces? If I were to transmit directly, the range would likely be limited. Also, if I use a relay, it seems that all the relays are local. Could you please advise me on how to connect to external cities and provinces?

BA3QU

qaqa_117

Once established, it can transmit over several hundred kilometers when there's abnormal activity.
Changing frequencies allows for communication over shortwave distances of up to thousands of kilometers.
Since "Tonglian" doesn't meet the needs, this is a great opportunity to progress. Instead of sticking with "Tonglian," it's much more enjoyable to join local WeChat groups and chat with enthusiasts.😁

BD4UPP

qaqa_117 You can go to the top of the building or to the summit, and then switch to a local network or satellite network for communication within the surrounding cities.

BI6OYU

For UV band communication, the basic method involves local operation, but it can also be used with satellite communication or with MMDVM. Both methods are suitable for beginners who learn about them online.

Jason

Use a satellite, MMDVM, or try disconnecting from the repeater in the neighboring city/county. If it works well, you might be able to communicate over hundreds of kilometers.

YofoaStudio

The UV segment is actually a very important point.
If you can climb high, you can also reach further.

BG2ELG

The electromagnetic environment being poor causes interference to UV equipment that is less severe than that caused by shortwave radio.

In a nutshell: Being high up gives you a wider view.

BG2EFX

First of all, UV (Ultraviolet) is a visual transmission method, and standing tall is always a good strategy.
Additionally, if you intend to use it with a handheld device, the power output is indeed quite low.
Finally, the interference you mentioned seems insignificant when using UV light. However, it could be a problem if there are other devices operating at the same frequency as your UV device.
Severe electromagnetic interference, primarily manifested in the HF frequency band.

qaqa_117

Thank you for your helpful answers. I also have another question: currently, my communication is only through local repeaters. If I want to find other channels and communicate with people, should I use the scanning function? (According to the manual, the scanning stops after detecting a carrier signal.)

BI6OYU

qaqa_117 I find that scanning isn't very effective; you need to have a ham radio operator actively communicating while scanning in order to detect them. However, the scanners are generally able to pick up tower cranes.😂Regarding the UV band, most communication is via repeaters or satellites. I personally feel that direct-to-satellite links are relatively rare. Perhaps some commonly used frequencies are being monitored by amateur radio operators (I saw mentions of 438.500 online). Using a spectrum analyzer on a shortwave radio provides a more intuitive way to identify signals, while scanning with a handheld radio feels like aimless searching. I only managed to detect one direct-to-satellite link, and the rest were all from tower operators.

BG2EFX

Let's look at the SDR as a whole; I think its spectral efficiency should be higher.

BD6MM

If you can't find a high building or reach the top of a hill, try using a satellite.

BA7MTH

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