[600MRG] W5EST's QRSS30 Report. 1 Dec. 15

Tue Dec 1 14:22:44 CST 2015

Jim's report didn't make it to 600M Group.
So i am relaying it.
Lots of keen data about the wa2xrm signals.
My antenna is a 30 foot vertical with 120W output, erp is probably 1W.
"RW" is the repeating call of the "RW" Beacon. It is the suffix of my ham call, w0RW.

i am using ON4YD's QRSS Program and don't know how to change it.
The dash - dot ratio is 3 .
i checked for microphonics, the rig is stable even after mechanical shocks. no fans cycling but the main house heater is cycling.
Thanks,
 Paul   wa2xrm
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What is your antenna, EIRP and TX input power?  What did “RW” mean ~0130z?
    RX Run WA2XRM-w5est 479.9548 1200km 0.5Hz stability.      SWL/K9’s excellent 0805-0930z screenshot at 1520km shows WA2XRM call sign with 0.5Hz stability and sudden freq jerks as if bumps to xrm tx table. At w5est, I saw such jerks on qrss30 too so I don’t think it was rx table disturbance either here or at swl/k9. Thanks for the informative TX run last night! 73, Jim H  W5ESTNOTES
--Overnight hours-scale freq stability excellent. Freq 479,954.8 Hz +/-0.2Hz. I saw no hours-long trend down or up.  FB!--QRSS readability can be increased for longer distance stations by increasing the seconds-scale& minutes-scale freq stability if possible by decreasing rate of freq change.  Presently, the XRM signal freq varies these ways: 1) Jerks up to 0.3 Hz in ~1 second. 2) In a single ramping dah-length (1.5min) freq either increases or decreases as much as 0.2Hz.  That rate is 133milliHertz/min. 3) Overnight the TX freq varied ~0.3Hz peak-to-peak in sinusoidal cycles 2-4 minutes long.--For shorter distances like 1500km where image SNR is high, suggest TX QRSS20 or QRSS10 even betterfor higher info rate and flatten the XRM signal stream more.  OK to avoid QRSS3 and its widened signal fuzz.--Sudden frequency shifts 0.3Hz may be due to some physical disturbance.  Can TX or its oscillator be put on some softly shock-absorbing surface.  --In the night is something like a TX fan cycling on/off every 2-4 minutes? Can the 0.3Hz frequency cycling be eliminated somehow without compromising something else. --Hard to distinguish the QRSS spaces from QSB. Can space/dit ratio be increased. If so, please increase spaces from present 0.5 dit length up to 1.0 dit or even 1.25 dit length. Increase letter spaces to 1.0 dah or 1.25 dah length. Increase word spaces to 2.5 or 3.0 dah lengths.  --Fuzzy widening of QRSS3 is inherent to QRSS3 100% amplitude modulating the RF at ~200mHz. The widening vanished at QRSS30. This means 630m amplitude modulation by seconds-scale QSB, if any, is also not contributing significant fuzzy widening of its own. --QRSS probably can’t take advantage of brief SNR enhancements post-SS and pre-SR.  Need JT9 for that type nimbleness perhaps.Thanks for the informative TX run last night! 73, Jim H  W5ESTTABLE:  WA2XRM, 7 ARGO SCREENSHOTS 12/1/15  AR: Little Rock, CO: DenverRX Mode VisGain  Time Interval (z)    Notes, Sunset SS, Sunrise SR.  RX W5ESTQRSS30   30      0004-0024    RX on 2300z.  SS AR. 2258z. SS CO 2336z. 5min QSB.QRSS30   30      0012-0136    Excellent image contrast. “RW” repeated 5 times.QRSS20   30      0142-0222    Used qrss20 to flatten sig. 5min qsb. Local ref ~1453.5 HzQRSS60   30      0258-0542    Capture 2.7 hr, see qsb. Longest qsb gap 0450-0454z.QRSS60   24      0642-0926    “ “.  QSB gaps 0726-0742, 0900-0912z.                                                Freq varies 0.3Hz p-p in cycles 2-4 minutes long.QRSS60   24      0922-1206    “ “. QSB gap 0948-0952. Signal weaker/qsb 1042-1206.QRSS30 24 at 1210-1245, 40 at 1245-1304                                               SR AR 1257z. SR CO 1401z. QSB worsens before SR AR.                                             Signal ends abruptly 1251z 6min pre-SR.                                             Signal resumes 1256-1302z after local SR. RX Off 1324z.                                     -------------------------------------------------------------------------------------Note: VisGain was varied to improve image contrast of QSB. Steady-strength local emission at 1453.5 comparatively helps detect any changes in ARGO image noise and distinguishes storm noise (didn’t occur 12/1) from true WA2XRM signal variations due to 630m QSB. 		 	   		  