AMSAT-BB December 2006

171 participants
258 discussions

I: Re: Offset Correction for CW Beacons in SatPC32

by Francesco Grappi

Yes I agree with you Michael, I read carefully everything about this matter, thanks Erich for your help! 73" Francesco IW4DVZ > -----Messaggio originale----- > Da: amsat-bb-bounces(a)amsat.org [mailto:[email protected]]Per > conto di Michael Hatzakis Jr MD > Inviato: sabato 2 dicembre 2006 17.07 > A: 'Erich Eichmann'; 'Dean Shutt' > Cc: amsat-bb(a)amsat.org > Oggetto: [amsat-bb] Re: Offset Correction for CW Beacons in SatPC32 > > > I want to take a moment to thank Erich for some impressive support of this > group, thanks, Michael K3MH > > > > -----Original Message----- > From: amsat-bb-bounces(a)amsat.org [mailto:[email protected]] On > Behalf Of Erich Eichmann > Sent: Saturday, December 02, 2006 3:03 AM > To: Dean Shutt > Cc: amsat-bb(a)amsat.org > Subject: [amsat-bb] Re: Offset Correction for CW Beacons in SatPC32 > > Dean, > 1. to calibrate your 2 data lines for each SSB sat for SSB and CW do > the following (separately for the SSB and CW entry): > > While the satellite is audible calibrate the uplink frequency > until you hear > your own voice or CW signal with the best audio pitch. To fine tune the > uplink frequency use the "Upl. Calibr." controls in menu CAT > (these controls > leave the downlink frequency unchanged, so, they change the offset between > downlink and uplink frequency). > > Then click the button "Change/Store Data File". In the menu that > opens click > on "Store ...Uplink Calibration". This function saves the new > offset and at > next program start you should hear your own signal with the right audio > pitch or very close to it. > > Recently there was a discussion whether to use the button "Change/Store > .. TX/RX frequency data" to save the calibration. The purpose of that > function is another one, however, see below. > > The calibration procedure should be done with each SSB satellite, because > there are hardware depending frequency deviations between the > single radios. > So, the frequencies that come with the program can't be optimized for each > radio. Between my IC-821H and IC-910H, i.e., is a deviation of > about 1 KHz. > > The mode entry in Doppler.SQF (USB, LSB, CW) can be changed only manually > with Notepad, of course. > > 2. > To start CAT tuning immediately on the beacon frequency of a > satellite, i.e. > FO-29, do the following (after you executed the procedure above 1): > > While the satellite is audible tune the radio to the satellite's beacon > signal. That can be done with the VFO knob. > > In menu "CAT" click the button "Change/Store Data File" and in > the menu that > opens click on "Change/Store RX/TX Freq. Data". > > That will save the new uplink AND downlink frequencies (after eliminating > the actual Doppler shifts, of course) but leaves the offset unchanged. To > operate over the satellite you only need to tune off the beacon > frequency to > an unused frequency. > > (This feature was very helpful with the AO-40 S-band beacon. It allowed to > easily find the own downlink signal inspite of the daily > temperature changes > of the outdoor downconverter L.O.) > > 3.There is a detailed description of these functions in the manual in the > section regarding menu CAT. > > 73s, Erich, DK1TB > > > > > ----- Original Message ----- > From: "Dean Shutt" <al7cr(a)amsat.org> > To: <erich.eichmann(a)t-online.de> > Cc: <amsat-bb(a)amsat.org> > Sent: Friday, December 01, 2006 8:56 PM > Subject: [amsat-bb] Offset Correction for CW Beacons in SatPC32 > > > > Erich, > > > > Further to a recent question, it appears that I must change the > > doppler.sqf file to calibrate a cw beacon rather than use the > > "change/store data file" button. Is this correct? I have a seperate > > line for each SSB sat that tunes the beacon frequency in CW mode and was > > attempting to adjust for the offsets in my system. > > > > Thanks for the help. > > > > 73 de Dean, AL7CR > > _______________________________________________ > > Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of the author. > > Not an AMSAT-NA member? Join now to support the amateur > satellite program! > > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > > > > > _______________________________________________ > Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > > _______________________________________________ > Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

15 years, 8 months

Offset Correction for CW Beacons in SatPC32

by Dean Shutt

Erich, Further to a recent question, it appears that I must change the doppler.sqf file to calibrate a cw beacon rather than use the "change/store data file" button. Is this correct? I have a seperate line for each SSB sat that tunes the beacon frequency in CW mode and was attempting to adjust for the offsets in my system. Thanks for the help. 73 de Dean, AL7CR

15 years, 8 months

23cm tranceivers

by William Leijenaar

Hi AMSATs, Recently I was looking for some 23cm trx to use it for testing higher bands transponders. I can do 23cm on satellite band with a transverter to 2m, but this is very un-practical in mobile use... Another problem is that it has only 2MHz couverage, and I like something that can cover the whole 23cm band in all-modes. I found several types from several brands, but all of them seem to be old and no more available. Because I am not into all those old/new types it takes me long time to find out what is a good choice and the same time available. I prefer all-mode 23cm trx from ~1240...1300MHz. Size in the order of a mobile set, but no huge base-station as I need it for moving around. Output power in the order of 1W is enough (more is extra), as I have amplifiers available to gear this up. New or old is all welcome, my main interrest is good RF performance. The best I found is IC-1275, but it is no more available and very rare to find (I read on internet) 73 de William ____________________________________________________________________________________ Want to start your own business? Learn how on Yahoo! Small Business. http://smallbusiness.yahoo.com/r-index

15 years, 8 months

GeneSat-1 preliminary TLE and first orbit events

by Ralph Wallio, W0RPK

The GeneSat-1 team provides the following preliminary TLE based on a nominal launch at 11Dec06 12:00UT: Preliminary GeneSat-1 1 99999U 06999X 06345.50694444 -.00000901 00000-0 -14127-4 0 04 2 99999 40.0194 072.9780 0008447 270.5318 220.8695 15.52687384 19 First orbit events based on this TLE: 12:00UT T0 Launch 12:20 T0+20 GeneSat-1 deployment - 437.075* beacon on-the-air 12:34 TCA South Africa 13:00 TCA Australia 13:31 TCA West coast North America 13:37 TCA Central North America 13:41 TCA East coast North America *Information sources have provided both 437.075 and 437.100 for the GeneSat-1 70cm downlink. TNX es 73 de Ralph Wallio, WØRPK W0RPK(a)netINS.net http://showcase.netins.net/web/wallio/ Hubbert's Peak - The Mother of all Perfect Storms

15 years, 8 months

AO-51 testing 2DEC2006

by Andrew Glasbrenner

The AO-51 Command Team will be running a short test tomorrow morning between the two morning passes of AO-51 over the eastern US. The BBS may be inaccessible, and the voice repeater may be off for a portion of the time after 1300Z and should be back by 1630Z. 73, Drew KO4MA VP Operations, AMSAT-NA

15 years, 8 months

Skywarn Recognition Day-W9S

by Erik Jacobsen

I am going to try to work the 2026 CST pass from the Romeoville, IL National Weather Servvice office (KLOT) using the W9S call sign. I have to drive an 66 miles through rush hour traffic 5-6 hours after a major snowstorm. Hopefully I will have a good notetaker. I will try to get Wish me luck Erik KB9BNY-Your EN51/EN52 Special Event Station Operator ;)

15 years, 8 months

sprint 2 tnc hooking dilemma

by nader omer

Hello all I need help to setup sprint 2 tnc from paccomm According to the manual I hooked up all the jumpers as it mention on the table at page 17 but nothing work The things confused me are 1- on page 6 the manual mention to operate a sprint-2 satellite model with same baud rate for uplink and downlink; ground the satellite selection line.J2 pin7 2- on page 15 mention ground pin 7 to (j2 to pin 6) to activate the dual speed feature 3- on page 30 SP5 is closed on all models except satellite model to work echo satellite I need same speed 9600 for both up and down links so what I should connect? I tried all the different ways of hooking the pins! but I got no print out from the satellite. the tnc can keying the radio and the dcd diode flickering ok please if anyone could give me the tnc setup i will be graceful 73 de nadir st2nh --------------------------------- Everyone is raving about the all-new Yahoo! Mail beta.

15 years, 8 months

CubeSat GeneSat-1 launch 11Dec06 with OSCAR telemetry downlink

by Ralph Wallio, W0RPK

Triple-CubeSat GeneSat-1 is scheduled for launch 11Dec06 12:00UT with TacSat-2 from NASA Wallops Flight Facility near Ocean City MD. AX.25 1200bps FM/AFSK telemetry transmissions on 437.075MHz will start immediately after deployment which will be at ~T0+20min. A GeneSat-1 web page will be available starting 06Dec06 via www.Genesat1.org with latest orbital and telemetry information. There will be a telemetry reception and reporting contest and electronic QSL cards. Current updated GeneSat-1 information is immediately available via http://showcase.netins.net/web/wallio/CubeSat.htm. TNX es 73 de Ralph Wallio, WØRPK W0RPK(a)netINS.net http://showcase.netins.net/web/wallio/ Hubbert's Peak - The Mother of all Perfect Storms

15 years, 8 months

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AMSAT-BB December 2006