[amsat-bb] [wsjtgroup] Caution Urged in Using High Duty Cycle Digital Modes on Satellites

[Ted]

FYI from the wsjt Group

 

73, K7TRK

 

From: wsjtgroup at yahoogroups.com [mailto:wsjtgroup at yahoogroups.com] On Behalf Of Bob McGraw K4TAX RMcGraw at Blomand.net [wsjtgroup]
Sent: Tuesday, October 31, 2017 6:05 PM
To: Wsjt
Subject: [wsjtgroup] Caution Urged in Using High Duty Cycle Digital Modes on Satellites

 

  

Satellite enthusiasts planning to try FT8 or MSK144 via satellite are 
being urged to use caution or possibly to avoid digital modes altogether 
in light of problems being blamed on the modes’ high duty cycle. 
Stations have reported problems getting into satellite transponders, 
even during favorable passes, which were traced to digital-mode signals 
in the transponder passband.

AMSAT News Service quoted an AMSAT-BB post (full thread) by Matthew 
Stevens, NJ4Y, who cited his recent experience with FO-29.

“Experimentation isn’t the problem, too much power is,” Stevens said. 
“It’s bad enough on SSB, worse with CW, and killer on constant duty 
cycle modes like FT8.” — Thanks to AMSAT News Service

Source:
http://www.arrl.org/news/caution-urged-in-using-high-duty-cycle-digital-modes-on-satellites

73
Bob, K4TAX

__._,_.___

  _____  

Posted by: Bob McGraw K4TAX <rmcgraw at blomand.net> 

  _____  


 <https://groups.yahoo.com/neo/groups/wsjtgroup/conversations/messages/25093;_ylc=X3oDMTJxbWdiNTc5BF9TAzk3MzU5NzE0BGdycElkAzU3NjQyNTQEZ3Jwc3BJZAMxNzA1MDYzMTA4BG1zZ0lkAzI1MDkzBHNlYwNmdHIEc2xrA3JwbHkEc3RpbWUDMTUwOTQ5ODQwNw--?act=reply&messageNum=25093> Reply via web post 

•

 <mailto:rmcgraw at blomand.net?subject=Re%3A%20Caution%20Urged%20in%20Using%20High%20Duty%20Cycle%20Digital%20Modes%20on%20Satellites> Reply to sender 

•

 <mailto:wsjtgroup at yahoogroups.com?subject=Re%3A%20Caution%20Urged%20in%20Using%20High%20Duty%20Cycle%20Digital%20Modes%20on%20Satellites> Reply to group 

•

 <https://groups.yahoo.com/neo/groups/wsjtgroup/conversations/newtopic;_ylc=X3oDMTJlaWFtbDFrBF9TAzk3MzU5NzE0BGdycElkAzU3NjQyNTQEZ3Jwc3BJZAMxNzA1MDYzMTA4BHNlYwNmdHIEc2xrA250cGMEc3RpbWUDMTUwOTQ5ODQwNw--> Start a New Topic 

•

 <https://groups.yahoo.com/neo/groups/wsjtgroup/conversations/topics/25093;_ylc=X3oDMTM2aHIzbWJuBF9TAzk3MzU5NzE0BGdycElkAzU3NjQyNTQEZ3Jwc3BJZAMxNzA1MDYzMTA4BG1zZ0lkAzI1MDkzBHNlYwNmdHIEc2xrA3Z0cGMEc3RpbWUDMTUwOTQ5ODQwNwR0cGNJZAMyNTA5Mw--> Messages in this topic (1) 

  _____  

  <https://s.yimg.com/ru/static/images/yg/img/megaphone/1464031581_phpFA8bON> 

 <https://yho.com/1wwmgg> Have you tried the highest rated email app? 

With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.

  _____  

To unsubscribe, send an email to:
wsjtgroup-unsubscribe at yahoogroups.com 

 <https://groups.yahoo.com/neo/groups/wsjtgroup/info;_ylc=X3oDMTJlNnNoODkyBF9TAzk3MzU5NzE0BGdycElkAzU3NjQyNTQEZ3Jwc3BJZAMxNzA1MDYzMTA4BHNlYwN2dGwEc2xrA3ZnaHAEc3RpbWUDMTUwOTQ5ODQwNw--> Visit Your Group 

·         <https://groups.yahoo.com/neo/groups/wsjtgroup/members/all;_ylc=X3oDMTJmZXZub3Y1BF9TAzk3MzU5NzE0BGdycElkAzU3NjQyNTQEZ3Jwc3BJZAMxNzA1MDYzMTA4BHNlYwN2dGwEc2xrA3ZtYnJzBHN0aW1lAzE1MDk0OTg0MDc-> New Members 55 

 <https://groups.yahoo.com/neo;_ylc=X3oDMTJkY2ZpYXA0BF9TAzk3MzU5NzE0BGdycElkAzU3NjQyNTQEZ3Jwc3BJZAMxNzA1MDYzMTA4BHNlYwNmdHIEc2xrA2dmcARzdGltZQMxNTA5NDk4NDA3> Yahoo! Groups

•  <https://info.yahoo.com/privacy/us/yahoo/groups/details.html> Privacy •  <mailto:wsjtgroup-unsubscribe at yahoogroups.com?subject=Unsubscribe> Unsubscribe •  <https://info.yahoo.com/legal/us/yahoo/utos/terms/> Terms of Use 





.

  <http://geo.yahoo.com/serv?s=97359714/grpId=5764254/grpspId=1705063108/msgId=25093/stime=1509498407> 
  <http://y.analytics.yahoo.com/fpc.pl?ywarid=515FB27823A7407E&a=10001310322279&js=no&resp=img&cf12=CP> 

__,_._,___