{"id":9638,"date":"2019-08-06T23:21:47","date_gmt":"2019-08-06T14:21:47","guid":{"rendered":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/?p=9638"},"modified":"2019-08-06T23:21:47","modified_gmt":"2019-08-06T14:21:47","slug":"nanovna","status":"publish","type":"post","link":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/?p=9638","title":{"rendered":"nanoVNA"},"content":{"rendered":"\n

私の出入りしているSNS界隈で，標記nanoVNAが話題となっています．<\/p>\n\n\n\n

先日の6m and Downコンテストに，miniVNA<\/a>を持っていきましたが，校正キットを持っていくのを忘れて使えずじまいでした．<\/p>\n\n\n\n

久しぶりに使うには，事前にソフトウェアを最新版にupdateしたうえで，校正・試用を十分済ませておくべきだったと反省して，後日，最新版のJAVA版のソフトをダウンロードしたのですが，なぜかMacBookで動いてくれなくなりました．Android版は動くので次回は事前にソフトのupdateをした上で，校正・試用してから，コンテストに臨みたいと思いました．<\/p>\n\n\n\n

そうこうしているとき，nanoVNAのことを知り，5000〜6000円で買えて，モニターが着いたスタンドアロンであるということで，これを買えば，PCやスマホとの接続とそれに伴う再校正も必要なくなりますので，購入を決めて，Aliexpressから最安値のものを買いました．<\/p>\n\n\n\n

前後して買われた方々の情報をまとめると，価格は前述の通り，日本円で送料込みで5000〜6000円程度のようです（筆者の購入価格は4,944円）．<\/p>\n\n\n\n

また，CH0, CH1のコネクタからフロンドエンド付近にシールドが施されているもの（JE6LVE\/JP3AEL HP & Blog）<\/a>と，省略されているものがあります（残念ながら筆者のは後者）．<\/p>\n\n\n\n

さらに，USBコネクターが，USB-Cのものと，USB-microのものがあるようです（筆者のは前者）．<\/p>\n\n\n\n

出荷時にインストールされているfirmwareは，4tracksの標準版(50kHz〜900MHz)の場合と，2tracks (Antenna Analyzer)版の場合があります（筆者のは後者）．<\/p>\n\n\n\n

2つのファームウェアの大きな違いは，文字通り表示されるトラックが4か2かですが，この他，フォントのサイズが異なり，2tracks版の方が少し大きくて，何とか読めるサイズです（4tracks版の小さいフォントは筆者には無理^^;）．<\/p>\n\n\n\n

ファームウェアは公開されていて，今日現在最新の2019年8月2日版では，50kHz〜900MHzの4tracks版と2tracks版，50kHz〜800MHzの4tracks版と2tracks版, 50kHz〜300MHzの4tracks版の5種類があります．50kHz〜800MHzのファームウェアは，8月2日<\/s> 7月5日版から出現1<\/a><\/sup>“更新记录.txt”による．<\/span>したようで，付属のupgradeマニュアルにも詳細は書かれていません．試したところでは，測定の帯域が50kHz〜800MHzになっていることは確認できましたが，そのほかに違いがあるか不明です．<\/p>\n\n\n\n

ファームウェアや，Windows用ソフトはGoogle Driveのここにあります．<\/p>\n\n\n\n

https:\/\/drive.google.com\/drive\/folders\/1-JViWLBOIzaHTdwdONX2RP8S4EgWxoND<\/a><\/p>\n\n\n\n

\"\"
50kHz〜800MHzの2tracksのファームウェアをインストール<\/figcaption><\/figure><\/div>\n\n\n\n
\"\"
50kHz〜900MHz 2tracksのファームウェアをインストール．800MHzまでものと，周波数範囲以外違いがあるのかどうか不明です．<\/figcaption><\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"

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