As an operator who ran government radio facilities for 30 years; there is no way a government station is going to know who else is on the freq, unless it is easily determined CW or FSK, and mostly they dont care. If I popped up looking for a clear freq, to send my other end to, and there was a signal there - I went looking elsewhere. If it were an ASSIGNED frequency (versus just within a band I was allowed), to me, and someone else was on it, I simply would fire up the transmitter, and they wouldnt be there long, or if they were, I called my good buddies over at the FCC monitoring office and they made a determination who/where it was, and if it happened day after day, they would contact the state department, who would contact the foreign equivalent and work it out. If it was a US station, they would immediately call them and tell them to get off, as it wasnt on their assignment.
Even though a "band" is shared with government or official transmitters, it doesnt mean they are going to wait for someone to get off. It simply means that you will not intefere with someone who IS ALREADY THERE. If no one is there. you have every right to transmit on an unused (shared) band. If he fires up on top of you - you simply have no right to complain - as he is the primary user. Under normal circumstances these freqs are not "assigned" as to an exacty freq, but he can slide anywhere within the band. Some government operators start thinking it is THEIR assigned freq, and keep going back to the same place every day, but that isnt necessarily so. Its just habit. When I supervised ( or was just running) a receiver site, I tried to insure that I or those who I supervised, never got on ham freqs (for instance) but we had the right to use those bands in an emergency. We had a complete listing, cycle-by-cycle of the whole spectrum of who was assigned each particular band and sub-band. Some freqs, assigned by the ITU were to be avoided at all costs to allow health-welfare-safety statiions a clear 24 hour a day use. Embassies world wide were sometimes issued the right to only a set number of freqs, and could go no where else. Ditto, commercial and other government facilities. Those were listed on the master ITU lists and were to be used ONLY by those assigned stations. Each government entity has full instructions on even how close one may get to another used freq, so as to avoid inteference - even different figures for different modes. It is certainly not an easy set of rules to follow, nor is everyone dedicated to following them. What it comes down to, is if I am on 30 meters, and that darned wide spaced RTTY station comes up and knocks me out of communication, I can do only one thing - move. If I am on 7.230 meters and running a contest and some Radio Iran, etc. comes up on top of me, again I can only do one thing - move. Now - if they come up on 7.030 - I have some complaint, becuase that is not their assigned freq in the ITU lists. No SWBC station belongs on that freq. But it may take us weeks or months to get it moved - and generally the word comes back down that it was a 2nd or 4th or something harmonic and they have fixed it. Then you also have those few countries that just dont give a darn, and put their transmitters where they want, when they want. Many times its because RADIO FREE PODUNK is already transmitting there with 50 watts, and the country that RFP is trying to overthrow puts up one of their own mammoth transmitters to jam them out. Politics! So - if something is there avoid it. If is is clear - use it. If it becomes jammed - move. Dont worry about trying to hold on to a spot. If they want it - they will take it, Your pip-squeak signals wouldnt do any harm to them anyway - and the other end of your link isnt going to hear you either. Danny Douglas N7DC ex WN5QMX ET2US WA5UKR ET3USA SV0WPP VS6DD N7DC/YV5 G5CTB all DX 2-6 years each. moderator [EMAIL PROTECTED] ----- Original Message ----- From: "jgorman01" <[EMAIL PROTECTED]> To: <digitalradio@yahoogroups.com> Sent: Thursday, October 26, 2006 10:14 AM Subject: [digitalradio] Re: ARRL Proposal: CW and Digital on 5MHz at 100W > I do have some concerns that would have been addressed by Bonnie's > strictures. > > One, can everyone watching a waterfall display recognize a weak > Federal SSB or digital signal trying to claim the frequency? > > Two, there are no restrictions on automatic stations. It looks to me > like auto stations less than 500 Hz in width can use these frequencies > also. It is unclear to me whether auto stations can meet the > requirements. The classic winlink 2K scenario where a client fires up > a PMBO station that inteferes with an Federal emergency conversation > comes to mind as a perfect example. It would have been nice to see > the ARRL address this issue directly in the regulations. > > The proposed rules don't address the how Federal stations will claim > the frequency so that all hams know what and how to monitor when using > disparate modes. If you start a pactor session, how does a Federal > station break in? How does a CW qso know a Federal SSB is trying to > claim the freq? You sholdn't just assume its another ham running SSB. > > It seems to me that it should be a requirement for amateur control > operators to be able to recognize and immediately decode USB signals > to insure that a SSB signal on the frequency IS NOT a Federal station > before continuing. To do otherwise will ultimately result in a > harmful interference or failure to relinquish claim by Federal users. > Maybe not today or tommorrow but sometime in future it will happen > and an emergency situation is by far the worst time to recognize that > not everything was set up properly. > > At the same time, Federal users should know exactly what is required > to claim the frequency, i.e. that a call in USB will be recognized by > all hams rather than coming on frequency with a mil spec modem and > making a data call. When sharing spectrum it only prudent that both > sides know exactly what the "claiming" method will be so that there > are no misunderstandings. Monitoring and decoding the "claiming" mode > should become standard operating procedure for hams to insure it is > done properly each and every time. > > Jim > WA0LYK > > --- In digitalradio@yahoogroups.com, "Danny Douglas" <[EMAIL PROTECTED]> > wrote: > > > > I would certainly support that. Especially if we are given digital mode > > capability on one or more channels. I would assume that means that more > > than one signal can come up on a channel, with, for instance, PSK. > I have > > monitored those channels several times, and yet to hear anyone on > them at > > times I have listened. I did have my TS570s expanded, so I can > transmit. > > But, due to low useage around here, I havent bothered to build an > antenna > > for it. So the minute they approve this, I will be there with bells on. > > > > Danny Douglas N7DC > > ex WN5QMX ET2US WA5UKR ET3USA > > SV0WPP VS6DD N7DC/YV5 G5CTB all > > DX 2-6 years each. > > moderator [EMAIL PROTECTED] > > > > > Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org > > Other areas of interest: > > The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ > DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) > > > Yahoo! Groups Links > > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.408 / Virus Database: 268.13.13/500 - Release Date: 10/26/2006 > > Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
