月: 2018年2月

久しぶりに

　投稿しています。

　ＦＴ８の影響で次元が低いようで高い？電波の質の話題が各所で花が咲いている今日この頃ですが久しぶりにサウンドデバイスをRight Mark Audio Analyzer（RMAA）で測定してみました。

　と言うかたまたま衝動買いのサウンドが二種類あったので思いつきました。

Right Mark Audio Analyzer（RMAA）
　http://audio.rightmark.org

　一つめは

　ＬＲのクロックが１個ずれているけどお安い､小さい、性能優秀との評判が高い

SYBA USB 2.0 External Stereo Sound Adapter Optical SPDIF Output Audio Dongle, Windows Mac Linux SD-AUD20101　　　　
　https://www.amazon.com/gp/product/B006SF68P2/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

　二つ目は

　１個なんと９８円のSD-AUD20101とみかけっそっくりの

SODIAL(R) 【3個】USB音源 7.1chサウンド　USB の長方形アダプタ USB-SHS2(ブラック)
　https://www.amazon.co.jp/gp/product/B015PWRHW6/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

　の二種類です。

　
SYBA SD-AUD20101

Summary
Frequency response (from 40 Hz to 15 kHz), dB +0.11, -0.20 Very good
Noise level, dB (A) -78.3 Average
Dynamic range, dB (A) 78.3 Average
THD, % 0.0080 Very good
THD + Noise, dB (A) -71.5 Average
IMD + Noise, % 0.035 Good
Stereo crosstalk, dB -75.8 Very good
IMD at 10 kHz, % 0.035 Good
General performance Good

RMAA SD-AUD20101 測定結果
　https://bunshiro.love/uploads/Syba-SD-AUD20101.pdf

SODIAL(R)USB-SHS2

Summary
Frequency response (from 40 Hz to 15 kHz), dB +0.17, -2.86 Average
Noise level, dB (A) -65.1 Average
Dynamic range, dB (A) 64.9 Poor
THD, % 0.068 Average
THD + Noise, dB (A) -56.5 Poor
IMD + Noise, % 0.591 Poor
Stereo crosstalk, dB -10.3 Very poor
IMD at 10 kHz, % 9.669 Very poor
General performance Poor

RMAA SODIAL(R)USB-SHS2 測定結果
　https://bunshiro.love/uploads/SODIAL-USB-SHS2.pdf

上記のような結果が出ました。

簡単に測定することが出来ますのでやってみてください。

田村文史郎　／　ＪＡ５ＦＮＸ　／　Ｂｕｎ

CAAC599を使えばアンテナチャンネル完全自動切り替えで憧れのＤＸペディションも一発Get！
https://bunpro.shop/whatiscaac599

fw:[wsjt-devel] WSJT-X v1.9.0-rc2: Testing of FT8 DXpedition Mode

The WSJT Development Group is pleased to announce a Release Candidate of
WSJT-X Version 1.9.0. This is a second beta release, so it’s called
v1.9.0-rc2. A first candidate release, v1.9.0-rc1, has already been
tested in the field by a small test group. A General Availability (GA)
release of v1.9.0 will be announced at a suitable time in the near
future. After that time you should no longer use any -rc# candidate.

Here’s a short list of features and capabilities added to WSJT-X since
Version 1.8.0:

1. New FT8 DXpedition Mode to facilitate high QSO rates in pileup situations

2. Decoding improvements for JT65 mode, including a priori (AP) decoding
when VHF/UHF/Microwave features are enabled

3. Optional Auto-Sequencing in JT4, JT9, and JT65 when VHF/UHF/Microwave
features are enabled

4. Better suppression of low-confidence false decodes generated by AP
decoding in FT8 mode

5. Improved decoding performance for WSPR mode, especially effective at
LF and MF

6. Minor adjustments to auto-sequencing behavior

7. More flexible Doppler control features for EME

8. Improved waterfall sensitivity for very weak signals

9. Automatic real-time forwarding of logged information to N1MM Logger+

10. Expanded and improved UDP messages sent to companion programs

11. Bug fixes and other minor tweaks to user interface

*Public Test of FT8 DXpedition Mode*
————————————

A primary purpose of this beta release is to allow field testing of FT8
DXpedition Mode. If you decide to install v1.9.0-rc2, please help us by
participating in a public test run scheduled for March 6-7 (evening of
March 6, NA time). The goal is to simulate a rare-DXpedition pileup by
having many stations (“Hounds”) calling and trying to work a designated
pseudo-DXpedition station (“Fox”). Note that everyone participating in
the test *MUST* use WSJT-X v1.9.0-rc2. In addition, you must read and
carefully follow the instructions posted here:
http://physics.princeton.edu/pulsar/k1jt/FT8_DXpedition_Mode.pdf

Reading the instructions for *FT8 DXpedition Mode* is very important!

If you have legitimate access to more than one callsign (XYL, club call,
or whatever) please feel free to call and work the Fox more than once.
We want the test pileup to be as deep as possible.

The scheduled test will take place as follows:

Date UTC Frequency
————————-
Mar 6 2300 14.080 MHz
Mar 7 0000 10.141
Mar 7 0100 7.080
Mar 7 0200 3.585

The indicated USB dial frequencies are subject to change, depending on
other band usage at the time. If last-minute instructions are necessary
they will be posted here:
http://physics.princeton.edu/pulsar/k1jt/DXpedition_Mode_Test.txt

Note that the dial frequencies are NOT the conventional FT8 operating
frequencies for each band. DXpedition Mode should *NOT* be used on
standard FT8 operating frequencies.

Of course you may also choose to do your own testing of FT8 DXpedition
Mode together with a group of colleagues. One station would act as Fox,
the others as Hounds. In such tests the Fox will be limited to using a
single Tx “slot”.

Installation packages for Windows, Linux, Macintosh, and Raspian Jessie
have been posted on the WSJT web site here:
http://physics.princeton.edu/pulsar/k1jt/wsjtx.html
Scroll down to the bottom of the page to find a link to the installation
package for your system.

You can also download the packages from our SourceForge site:
https://sourceforge.net/projects/wsjt/files/

Please report any problems to email list
wsjt-devel@lists.sourceforge.net. You must be a subscriber in order to
post there.

— 73 from Joe, K1JT, for the WSJT Development Group

——————————————————————————
Check out the vibrant tech community on one of the world’s most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
wsjt-devel mailing list
wsjt-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/wsjt-devel

From Joe Taylor:

“Hi all,

You have probably heard something about recent efforts to develop a special “FT8 DXpedition Mode” in WSJT-X. This message aims to bring you up-to-date on our progress, and generally to make our plans more widely known.

The basic goal of *FT8 DXpedition Mode* is to enable DXpeditions to make FT8 QSOs at the highest possible rates. We have been working together with members of the Baker Island (KH1/KH7Z) group. Their planned expedition will take place in June-July 2018. Like most major DXpeditions, this one will almost certainly make a majority of its QSOs using SSB and CW. However, the group is well aware of the rapid rise of FT8 popularity, and they plan to use FT8 as well.

Making FT8 QSOs with KH1/KH7Z will require the DXpedition and everyone trying to work them to use a new, yet-to-be-released version of WSJT-X.

We have tested the new program features on the air several times, and found them to work well. Another test run will probably be scheduled in a month or so. There will be plenty of advance publicity inviting others to upgrade to a “Release Candidate” called WSJT-X v1.9.0-rc1, and to join in trying to work one or more specific “pseudo-DXpedition” stations at a certain time and frequency. In this way, we hope to continue shaking bugs out of the program and generally to improve its usability — both for the DX operator and those seeking to work him.

FT8 DXpedition mode includes a number of new and innovative features.
For further details on what’s in store, I draw your attention to a draft of the “FT8 DXpedition Mode User Guide” posted here:
http://physics.princeton.edu/pulsar/k1jt/FT8_DXpedition_Mode.pdf

With best wishes,

— 73, Joe, K1JT, for the WSJT Development Group”

CAAC599を使えばアンテナ完全自動切り替えで憧れのブーベ島も一発Get！
CAAC599はバンド情報出力もあるので色々応用出来ます。

https://bunpro.shop/whatiscaac599

田村文史郎／ＪＡ５ＦＮＸ