I thought we solved this problem a while ago and Bill put in a patch that guarantees each requested band is visited once. Or is that a different operating mode? 73 Mike W9MDB
-----Original Message----- From: Joe Taylor [mailto:[email protected]] Sent: Tuesday, July 07, 2015 3:09 PM To: WSJT software development Subject: Re: [wsjt-devel] WSPR-2 - Scheduler in no band hopping mode Hi Steve, The question, I guess, is what distribution is "random enough" and yet satisfies certain other constraints such as - don't transmit twice in succession, at least if TxPct is small - don't receive more than X times in succession Maybe those constraints are unnecessary or undesirable. I'm not particularly arguing either way (but experience shows that some operators will complain if we don't include them). -- Joe On 7/7/2015 3:58 PM, Steven Franke wrote: > Joe and Jean Louis, > > I dont see whats wrong with the distribution that Jean Louis measured. In fact, Im happy with it! > > It looks like a geometric distribution, which is exactly what you get for the run-length distribution when flipping a (possibly biased) coin. Given all of the extra constraints that we have to satisfy with the scheduler, I think that its an achievement to retain this purely random looking run-length distribution! > > Steve k9an > >> On Jul 7, 2015, at 10:25 AM, Joe Taylor<[email protected]> wrote: >> >> Hi all, >> >> The T/R statistics gathered by Jean Louis are interesting. >> >> For what it's worth: they are an illustration of why in old versions >> of WSPR I did T/R scheduling by "randomly" selecting a number of >> consecutive Rx periods that should follow a Tx period. I chose the >> minimum "nrx" to be 1; the maximum was determined as follows: >> >> rxavg = 100.0/pctx - 1.0 !Average # of Rx per Tx >> nrx = nint(rxavg + 3.0*(x-0.5)) !x is random in (0,1) >> >> This seemed to be a good compromise and produced what most operators >> considered to be suitable "random" T/R behavior. >> >> Scheduling was different when coordinated band-hopping is in use. >> The algorithm is in file "rxtxcoord.f90". It seemed OK, but I'm not >> sure it was as thoroughly tested as desirable. >> >> -- Joe >> >> On 7/7/2015 10:58 AM, f5djl wrote: >>> 89 Tx slots over a total 363 , so quite good for a setting of 25% . >>> however distribution of number of RX periods between TX time slot is >>> also interesting : ranging from 1 to 18 rx consecutive time slots >>> but 46 % separated only by one RX period : >>> >>> >>> >>> Total Tx = 89 24,52% >>> >>> Total Rx = 274 75,48% >>> >>> >>> >>> Distribution Delta between TX slots 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Total >>> >>> Occurrence = 41 17 9 8 2 2 3 0 0 0 2 2 0 0 1 0 0 2 89 >>> >>> % = 46,1% 19,1% 10,1% 9,0% 2,2% 2,2% 3,4% 0,0% 0,0% 0,0% 2,2% 2,2% 0,0% 0,0% 1,1% 0,0% 0,0% 2,2% 100,0% >>> >>> >>> >>> >>> >>> Apologies in advance , not sure if table will be very readable !!!. >>> >>> >>> >>> Best 73 >>> >>> >>> >>> Jean Louis >>> >>> -----Message d'origine----- >>> De : Steven Franke [mailto:[email protected]] Envoyé : mardi 7 >>> juillet 2015 02:17 À : WSJT software development Objet : Re: >>> [wsjt-devel] WSPR-2 - Scheduler in no band hopping mode >>> >>> >>> >>> Jean Louis, Joe - >>> >>> >>> >>> Does this happen only if you have never touched TX Pct since starting the program? >>> >>> >>> >>> When you observed this behavior what was the TX Pct? How long did you run with no transmissions? In particular, did you go for a full 2 hours with no transmission? If so, then does the scheduler eventually kick in after 2 hours with no transmission? >>> >>> >>> >>> I havent changed anything in the wspr tx scheduler recently. I know that Bill adjusted the band selection algorithm not too long ago, but that shouldnt have involved the scheduler. I just looked at the code, and it seems that the tx table should be automatically generated the first time that next_tx_state() is called. >>> >>> >>> >>> Ill also note that the statistics of the scheduler may feel different when TX Pct is less than 17%, as a different algorithm is used in that regime. >>> >>> >>> >>> Steve k9an >>> >>> >>> >>>> On Jul 6, 2015, at 6:32 PM, Joe Taylor< <mailto:[email protected]> [email protected]> wrote: >>> >>>> >>> >>>> Hi Jean Louis and all, >>> >>>> >>> >>>> I have not yet tried to trace the cause, but I have also observed >>>> the >>> >>>> behavior you describe. In WSPR mode, WSJT-X can stop initiating >>>> any >>> >>>> Tx sequences, even though "Enable Tx" remains ON (red background). >>> >>>> >>> >>>> I think Bill (or was it Steve?) made the most recent changes to the >>> >>>> T/R scheduler. Is it possible that somehow the T/R table becomes >>> >>>> lost, or is not re-calculated when that should happen? >>> >>>> >>> >>>> -- Joe, K1JT >>> >>>> >>> >>>> On 7/6/2015 9:20 AM, f5djl wrote: >>> >>>>> Hello to all >>> >>>>> >>> >>>>> While testing the patch kindly provided by Mike for the rig >>>>> control >>> >>>>> of FT991 ( thanks Mike and it seems to work smoothly for WSPR/991) >>>>> , >>> >>>>> I noticed the following (BTW observed on two different TX >>> >>>>> configurations FT897 and FT >>> >>>>> 991) : >>> >>>>> >>> >>>>> 1/WSPR seems stuck in RX mode despite the enable TX button being red . >>> >>>>> >>> >>>>> 2/ Just changing the TXPct % seems to resume the transmit >>>>> process >>> >>>>> ( I understand this action forces to recalculation of the table >>>>> used >>> >>>>> by the scheduler ) >>> >>>>> >>> >>>>> 3/ I tried a TX next button before changing the TX pct , and >>> >>>>> although it triggered a single transmission it did not resume the scheduler. >>> >>>>> >>> >>>>> 4/ I have not yet managed to figure what could have stopped TX >>> >>>>> process , is it the automatic ( every two hours ?) recalculation >>>>> not >>> >>>>> happening or something else not sure . >>> >>>>> >>> >>>>> 5/ I have seen it working for several hours without problem so >>>>> it >>> >>>>> is not always the case . >>> >>>>> >>> >>>>> Any advice on how to better capture the condition which lead to TX >>> >>>>> process stopping will be much appreciated ( I had a look at >>> >>>>> WSPR_history file and except the absence of TX slot could not see >>> >>>>> anything obvious) >>> >>>>> >>> >>>>> Latest tests were performed on Win 8.1 , 1.6.0-dev r 5685 with >>>>> FT897 >>> >>>>> and >>> >>>>> FT991 . >>> >>>>> >>> >>>>> Very best regards >>> >>>>> >>> >>>>> Jean Louis F5DJL >>> >>>>> >>> >>>>> >>> >>>>> >>> >>>>> PS : If anybody has hand-on experience with FT991 in DATA-USB mode >>> >>>>> thru the TRX internal audio card ( ie audio via internal USB >>> >>>>> interface ) , please contact me direct as the setting of the DSP >>> >>>>> filter in that specific mode ( Data-USB not USB) on the unit at >>>>> hand >>> >>>>> does not perform as per the page 58 the manual ! I will be >>>>> interested >>> >>>>> to share experience with another owner of FT 991) . I have also >>> >>>>> joined FT991 group as this is not specific to WSJT modes. >>> >>>> >>> >>>> ------------------------------------------------------------------- >>>> --- >>> >>>> -------- Don't Limit Your Business. Reach for the Cloud. >>> >>>> GigeNET's Cloud Solutions provide you with the tools and support >>>> that >>> >>>> you need to offload your IT needs and focus on growing your business. >>> >>>> Configured For All Businesses. Start Your Cloud Today. >>> >>>> <https://www.gigenetcloud.com/> https://www.gigenetcloud.com/ >>> >>>> _______________________________________________ >>> >>>> wsjt-devel mailing list >>> >>>> <mailto:[email protected]> [email protected] >>> >>>> <https://lists.sourceforge.net/lists/listinfo/wsjt-devel> https://lists.sourceforge.net/lists/listinfo/wsjt-devel >>> >>> >>> >>> >>> >>> -------------------------------------------------------------------- >>> ---------- >>> >>> Don't Limit Your Business. Reach for the Cloud. >>> >>> GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. >>> >>> Configured For All Businesses. Start Your Cloud Today. >>> >>> <https://www.gigenetcloud.com/> https://www.gigenetcloud.com/ >>> >>> _______________________________________________ >>> >>> wsjt-devel mailing list >>> >>> <mailto:[email protected]> [email protected] >>> >>> <https://lists.sourceforge.net/lists/listinfo/wsjt-devel> https://lists.sourceforge.net/lists/listinfo/wsjt-devel >>> >>> >>> >>> >>> >>> >>> >>> -------------------------------------------------------------------- >>> ---------- Don't Limit Your Business. Reach for the Cloud. >>> GigeNET's Cloud Solutions provide you with the tools and support >>> that you need to offload your IT needs and focus on growing your business. >>> Configured For All Businesses. Start Your Cloud Today. >>> https://www.gigenetcloud.com/ >>> >>> >>> >>> _______________________________________________ >>> wsjt-devel mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/wsjt-devel >> >> --------------------------------------------------------------------- >> --------- Don't Limit Your Business. Reach for the Cloud. >> GigeNET's Cloud Solutions provide you with the tools and support that >> you need to offload your IT needs and focus on growing your business. >> Configured For All Businesses. Start Your Cloud Today. >> https://www.gigenetcloud.com/ >> _______________________________________________ >> wsjt-devel mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/wsjt-devel > > > ---------------------------------------------------------------------- > -------- Don't Limit Your Business. Reach for the Cloud. > GigeNET's Cloud Solutions provide you with the tools and support that > you need to offload your IT needs and focus on growing your business. > Configured For All Businesses. Start Your Cloud Today. > https://www.gigenetcloud.com/ > _______________________________________________ > wsjt-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/wsjt-devel ---------------------------------------------------------------------------- -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel
