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 haven’t changed anything in the wspr tx scheduler recently. I know that
> Bill adjusted the band selection algorithm not too long ago, but that
> shouldn’t 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.
>
>
>
> I’ll 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.
>
>>
>
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