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CX2SA > SATDIG 23.04.11 21:08l 158 Lines 4978 Bytes #999 (0) @ WW
BID : AMSATBB6236
Read: GUEST
Subj: AMSAT-BB-digest V6 236
Path: IZ3LSV<9A0BBS<VE2PKT<ON0AR<HS1LMV<CX2SA
Sent: 110423/1905Z @:CX2SA.LAV.URY.SA #:1590 [Minas] FBB7.00e $:AMSATBB6236
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Logsat anyone? (Joe Leikhim)
2. FO 29 help (Ted)
3. Re: Icom D-Star (Gordon JC Pearce)
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Message: 1
Date: Sat, 23 Apr 2011 12:42:20 -0400
From: Joe Leikhim <rhyolite@xxxxxxxx.xxx>
Subject: [amsat-bb] Re: Logsat anyone?
To: John Wright <ham@xxxxx.xx.xx>, amsat-bb@xxxxx.xxx
Message-ID: <4DB3016C.3060105@xxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Thanks; I found it. Turns out if the screen is maximized the status bar
rolls off the page. I thought I was losing my mind.
On 4/23/2011 7:18 AM, John Wright wrote:
>
> At 23:59 22/04/2011, you wrote:
>> I have just reinstalled LOGSAT and Y2k upgrade after a hiatus. If I
>> recall, the program would report the age of the KEPs on screen. Does
>> anyone remember how to bring this up? I can't make it show up. Thanks.
>
>
>
> Select the one you want to know the age of, and set it as active
> satellite. It then shows age of keps bottom left corner.
>
>
>
--
Joe Leikhim
Leikhim and Associates
Communications Consultants
Oviedo, Florida
www.Leikhim.com
JLeikhim@xxxxxxx.xxx
407-982-0446
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Message: 2
Date: Sat, 23 Apr 2011 11:08:29 -0700
From: "Ted" <k7trkradio@xxxxxxx.xxx>
Subject: [amsat-bb] FO 29 help
To: "'amsat-bb'" <amsat-bb@xxxxx.xxx>
Message-ID: <4EDCCDC24E15410BA806C31CEDA08866@xxxxxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
Good morning,
Since putting up the Elk on a rotor (fixed el +- 25 deg), I decided to try
some linear birds.
I have tried FO 29 about 3x but seem to have some issues. I am using TS-2000
in SAT mode with HRD Sat program.
Up: 145.9 LSB
Dn: 435.8 USB
I am clearly able to track the bird with doppler as I can hear the CW beacon
through the entire pass (switching back and forth). I can also TX into the
bird and hear my signal coming back duplex. However, what is coming back is
my voice signal but totally unintelligible. Also, I have heard no other
stations on these passes.
Am I doing something wrong?
Tnx for any help
Ted, K7TRK
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Message: 3
Date: Sat, 23 Apr 2011 19:42:27 +0100
From: Gordon JC Pearce <gordonjcp@xxxx.xxx>
Subject: [amsat-bb] Re: Icom D-Star
To: amsat-bb@xxxxx.xxx
Message-ID: <1303584147.25652.10.camel@xxxxx>
Content-Type: text/plain; charset="UTF-8"
On Sat, 2011-04-23 at 10:42 -0500, Gregg Wonderly wrote:
> In the end, digital compression of spectrum space is going to happen more
and
> more. AM style broadcast is hugely inefficient even though it is painfully
Okay, but *why*? Why are we so obsessed with squeezing bandwidth down
and down, at the expense of intelligibility?
I've got my spectrum analyser hooked up to my 2m aerial at the moment.
For the past half hour it has indicated the odd little spike at
144.800MHz indicating a little bit of (weak) APRS traffic, a big spike
at the output of GB3CS (because it's line-of-sight), a couple of
slightly smaller spikes from the other two local repeaters (PA and KE)
and a bump where FE, FF and AY are supposed to be (they're quite weak
here).
Other than about 300kHz of repeater outputs and 25kHz of packet, the
rest of the 2m band is *empty*.
If I switch it to scan 70cm, I'll see GB3KV (co-sited with CS) and
nothing else, except the odd satellite up around 435MHz and a brief
burst when my heating oil tank gauge decides to tell me I need to buy
more oil.
I could safely use channels 250kHz wide on 70cm, if I had a mind to do
so. It wouldn't get in anyone's way, because there's no-one there to
annoy. This is even more true of 23cm, and higher. We've got loads of
space to play with, on all the bands except 30m and 60m which have their
own kind of charm.
> simple to do. I don't really believe that D-Star is the right choice for
> "everything" because it is single source. But, so is Microsoft windows,
> MacOS-X, and many other software based systems. If you are an FPGA
programmer,
> perhaps you can build an FPGA based CODEC for amateur radio that would do
voice
> compression etc. But in the end, you also have to have an transmitter
with the
> appropriate bandwidth output to reduce the spectrum used.
This is where D-Star falls down - it's *still* just a 12.5kHz-wide
channel. Without getting into linear PAs and the like, it's going to be
quite hard to do anything else and have a useful data rate.
As for FPGAs, why not just use a cheap general-purpose DSP or even CPU?
That's what people tend to end up implementing on the FPGA anyway.
Gordon MM0YEQ
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End of AMSAT-BB Digest, Vol 6, Issue 236
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