Hi Dick and Bdale,
Good points about keeping the command receiver on 100% - no issue there. But I think the matter is somewhat confused (at least for me) since I believe the command receiver that John has designed is also the data/analog receiver. I don't recall that being the case is the past satellites. If command and data function stay combined, then that's all the more reason for considering John's suggestion for two U receivers.
Correct me if I'm wrong, but I also understand that there will also be a separate L command receiver, but again not sure about that too.
Gosh - just think how handy a satellite top level block diagram might be, even if its a work in progress. Or is there one and I haven't bumped into it.
Regards...Bill - N6GHz
Dick Jansson-rr wrote:
In my recollection there has been no option to anything with a command receiver at all in past satellites. This receiver was ON to be able to do its function regardless of other 'activities' on the satellite. In other words, it could not be messed with for any reason. Such a capability is absolutely essential for the health (and recovery) of the satellite and its mission.
Dick Jansson, KD1K kd1k@amsat.org kd1k@arrl.net
-----Original Message----- From: eagle-bounces@amsat.org [mailto:eagle-bounces@amsat.org] On Behalf Of Bdale Garbee Sent: Wednesday, 11 April, 2007 1439 To: Bill Ress Cc: K3IO@verizon.net; EAGLE Subject: [eagle] Re: Eagle 10 MHz Clock
On Tue, 2007-04-10 at 14:12 -0700, Bill Ress wrote:
Don't think power would be impacted since the spare unit would be in a power down mode.
Please don't assume that it's ok to have the power to a command receiver switchable without substantial discussion and review. All prior AMSAT projects that I'm aware of have had command receivers always on, even if they weren't always in use. I'm pretty confident that includes both of a redundant pair. Happy to be corrected by others with better knowledge of history if I'm mis-remembering some relevant case.
Bdale
Via the Eagle mailing list courtesy of AMSAT-NA Eagle@amsat.org http://amsat.org/mailman/listinfo/eagle