[DoctorOhh]

Originally Posted by a12rodgers

Let's say I have two news feeds:
- NewsDaily (marked schedule for download every 1.0 days)
- NewsWeekly (marked schedule for download every 7.0 days)
- NewsMonthly (marked schedule for download every 30.0 days)

Scheduling means that they will automatically download when the 1,7 or 30 days has expired. You need do nothing, when the time is up and calibre is running then they, the news source, will be downloaded without intervention from you.

Originally Posted by a12rodgers

Now let's say it's Monday. I would think that if I clicked on "Download all scheduled news sources," only NewsDaily would download. But when I clicked on them yesterday, all feeds downloaded. And when I opened up Calibre today and clicked that option, all three feeds downloaded again.

If you "Download all scheduled news sources," then ALL news sources that are in the schedule area will be downloaded. This a way to manually download every news source you have set a schedule time on.

Originally Posted by a12rodgers

Does scheduling mean something different than I think it does?

Yes, see above.

Originally Posted by a12rodgers

Is this some kind of timer that works only if Calibre stays open for a full 24 hours (at which point, NewsDaily will kick off again)?

The timer works regardless of whether calibre is active or not. Check the recipe schedule you will see how long it has been since it last downloaded.

Originally Posted by a12rodgers

What if I just leave the computer off and turn it on in a couple of days -- should the NewsDaily kick off again?

Yes it will kick off again. When you start calibre it will see the time has come and gone and automatically download the NewsDaily.

Originally Posted by a12rodgers

Is there any other way (short of manually triggering each download) for Calibre to automate retrieval at given intervals?

If you know how to run a chron job from the command line you can schedule calibre to download any recipe via the ebook-convert module (see manual).