SDR 測試之準備

外國ham界近年流行的SDR,全名為 software defined radio。主要為SDR硬件一台,經USB接駁到電腦;並以電腦為控制,顯示平台,甚至利用電腦的CPU強大運算功能去將一些接收到的訊號解碼。外國己有ham友寫了個plugin將 D-star的數碼訊號解碼播放出來。

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HDSDR 官網圖片

回想中學時代,用祖父遺下來的殘舊飛利浦全頻收音機左拎右調;給我誤打誤撞的收到逢下午五時莫斯科廣播電台對遠東地區進行的粵語廣播 (有無聽過蘇聯佬/婆講廣東話?) ,已經覺得很勵害。遲出世廿年,電腦普及,一部電腦就可做到很多以前做不到的東西,現代人真幸福。

當然,垂手可得就不會珍惜。有電腦用,有Internet用,我諗無人會用幸福嚟形容;只會問可唔可以部PC行快的,條寬頻up上1G幾錢。

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SDR#  官網圖片

SDR硬件,貴的有外國專業成品,有的更附有Tx功能。也不平,但已比一部HF檯機平好多。

廉價的,是用數碼廣播USB接收手指。也就是我用的方法。

不知是月下貨,或電腦節的貨尾,還是大斑台就執笠而減價清貨。昨日在黃金買了set原價$180的Magic-Pro Pro Radio 1000的數碼廣播USB接收手指,盛惠$128。

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係,淘寶也有,但幾十元再加幾十元運費,倒不如買支行貨有保用。

數碼廣播USB接收手指要玩到SDR,其一種硬件規格:

  • 芯片: RTL2832U
  • Tuner Chip: E4000或FC0012或13等

網上資料顯示,RTL2832U+E4000為最佳組合,不需改裝可覆蓋頻率最寬(about 60 MHZ to above 1700 MHZ,需配以適當天線)。FC0013則可能對靜電噪聲較敏感。

Pro Radio 1000為 RTL2832U + FC0013。

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對以上E4000的數據我是懷疑的,幾十蚊支手指唔駛再tune,換filter,用HC49廉價xtal ,PCB個di-electric constant 等等唔駛再夾就可上到1.7GHz 咁神?

我亦唔介意FC0013的問題,如好多local ham一樣,配齊HF至微波天線係dream。總之有聲有畫出我都好滿意,如可decode埋APRS等packet就當係bonus。

有關SDR的軟件,流行的是HDSDR和SDR#。需留意不要安裝跟手指的driver。要用專用的driver。

天時暑熱,暫只試到成功安裝driver呢度。無mood試其他和開辣雞換頭。

右欄已加入SDR一欄,會陸續加入其他有用資料。

9月1日更新:
雖driver可成功安裝,但發現SDR#或HDSDR皆認不到隻手指。要有又多件垃圾既準備….

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4 Responses to SDR 測試之準備

  1. Robert says:

    该Proradio1000没有工作?我也有同样的设备。请告诉我,如果你能够使它发挥作用。请原谅我的中国。我使用谷歌翻译。

    罗伯特

  2. Peter says:

    I have been using the software “SDR Console” (from SDR-Radio) and connected to remote servers in foreign country for tuning. The GUI of SDR Console is a bit similar to SDR#. I will try using it with a RTL-SDR dongle later to see how well the dongle will perform. It has a “Digital Mode” module (to be complete, not functional yet) which can decode PSK and RTTY within the console.

    The SDR Console is still in development and version 3 is expected to be released by the end of Q2 this year.

  3. Peter says:

    The first preview of SDR Console v3 (Windows 7 minimum, XP not supported) was released on March 25. You have to join their Yahoo Group (closed membership, have to ask for approval to join) before downloading the preview. The GUI of this preview release looks much improved but the “console” function not provided yet and using with RTL-SDR dongle will probably crash.

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