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Re: [wsjtgroup] Re: Multi Receives Mystery WSJT-X v1.2 r3563 JT alert x 2.4.8

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  • Joe Subich, W4TV
    The important thing will be to make sure the station you test with has a low local noise and receives a 0dB or stronger signal from you. These spurious
    Message 1 of 11 , Aug 30, 2013
      The important thing will be to make sure the station you test with
      has a low local noise and receives a "0dB" or stronger signal from
      you.

      These "spurious" reports almost always report the "secondary" signals
      are between 20 and 30 dB weaker than the main signal. Thus, if the
      decode limit of the software is -20 to -25 dB, the primary signal
      will need to be at least 0 dB or stronger before the secondary signals
      rise above the receive station's noise floor.

      73,

      ... Joe, W4TV


      On 8/30/2013 1:10 PM, Rudy Benner wrote:
      > Best thing to do is arrange a sked with someone you know and get him to record the exchange, then have him send you the files.
      > You can then make your own conclusions.
      > Better yet, do this with more than one station.
      >
      > Monitoring 20 meters right now.
      >
      > ve3bdr rudy
      >
      > From: wo4r_jeff
      > Sent: Thursday, August 29, 2013 8:46 PM
      > To: wsjtgroup@yahoogroups.com
      > Subject: [wsjtgroup] Re: Multi Receives Mystery WSJT-X v1.2 r3563 JT alert x 2.4.8
      >
      >
      > Since my signal is being discussed has anyone else noticed these multi decodes. If I have a problem I need to know so I can get it fixed.
      >
      > WO4R Jeff
      >
      > --- In mailto:wsjtgroup%40yahoogroups.com, "Joe Subich, W4TV" <lists@...> wrote:
      >>
      >>
      >> Those are spurs - either on the transmitted signal or being generated
      >> in your sound card. Note the first spur is ~24 dB below the "primary"
      >> signal and they are multiples of 60 (120) Hz away.
      >>
      >> Either WO4R (and ND4Q) has a significant level of 120 Hz power supply
      >> hum on his signal or your sound card has a 120 Hz ripple that gets
      >> mixed with very strong signals (signals > ~-3 dB). It is not possible
      >> to tell for sure whether these are transmit or receiver generated
      >> spurs based on the small sample since they are observed on WO4R and
      >> ND4Q but not VO1OR at a similar signal level. Only more monitoring
      >> will be able to sort out the source.
      >>
      >> 73,
      >>
      >> ... Joe, W4TV
      >>
      >>
      >> On 8/29/2013 9:19 AM, e.carletta wrote:
      >>>
      >>> Anybody know why this occurs ?
      >>> Same Calls different freq's , different sig levels.
      >>> Are these op's working split?
      >>>
      >>> Mike/K2OI
      >>>
      >>>
      >>> -
      >>>
      >>> 1259 -23 1.2 2905 @ JN1JYD WO4R EM74
      >>>
      >>> 1259 1 1.2 3265 @ JN1JYD WO4R EM74
      >>>
      >>> 1259 -22 1.3 3625 @ JN1JYD WO4R EM74
      >>>
      >>> 1259 -24 1.2 4225 @ JN1JYD WO4R EM74
      >>>
      >>> 1259 -11 1.2 417 # AD7MQ VO1OR -10
      >>>
      >>> ----------------------------------------
      >>>
      >>> 1301 -24 1.2 2904 @ JN1JYD WO4R R-20
      >>>
      >>> 1301 -24 1.1 3024 @ JN1JYD WO4R R-20
      >>>
      >>> 1301 0 1.2 3264 @ JN1JYD WO4R R-20
      >>>
      >>> 1301 -24 1.2 3504 @ JN1JYD WO4R R-20
      >>>
      >>> 1301 -25 1.2 4225 @ JN1JYD WO4R R-20
      >>>
      >>> 1301 -6 1.2 417 # AD7MQ VO1OR RRR
      >>> 1303 -23 1.2 3144 @ JN1JYD WO4R 73
      >>>
      >>> 1303 5 1.2 3264 @ JN1JYD WO4R 73
      >>>
      >>> 1303 -22 1.1 3504 @ JN1JYD WO4R 73
      >>>
      >>> 1303 -21 1.2 3624 @ JN1JYD WO4R 73
      >>>
      >>> 1303 -23 1.2 4224 @ JN1JYD WO4R 73
      >>>
      >>> 1303 -23 1.2 4344 @ JN1JYD WO4R 73
      >>>
      >>> 1303 -24 1.2 4464 @ JN1JYD WO4R 73
      >>>
      >>> 1303 -6 1.1 417 # RR 73GL VO1OR
      >>>
      >>> 1303 -16 1.4 995 # BG5JND N2MGT FN13
      >>>
      >>> ----------------------------------------
      >>>
      >>> 1304 -1 1.2 1757 # WB9RAS ND4Q EM64
      >>>
      >>> 1304 -21 1.2 1997 # WB9RAS ND4Q EM64
      >>>
      >>> 1304 -20 1.2 2117 # WB9RAS ND4Q EM64
      >>>
      >>> 1304 -21 1.2 3077 # WB9RAS ND4Q EM64
      >>>
      >>> ----------------------------------------
      >>>
      >>> 1305 -22 1.1 2708 @ CQ WO4R EM74 ~United States
      >>>
      >>> 1305 -23 1.1 2828 @ CQ WO4R EM74 ~United States
      >>>
      >>> 1305 -22 1.1 2948 @ CQ WO4R EM74 ~United States
      >>>
      >>> 1305 4 1.1 3068 @ CQ WO4R EM74 ~United States
      >>>
      >>> 1305 -23 1.2 3188 @ CQ WO4R EM74 ~United States
      >>>
      >>> 1305 -23 1.1 3308 @ CQ WO4R EM74 ~United States
      >>>
      >>> 1305 -22 1.1 3428 @ CQ WO4R EM74 ~United States
      >>>
      >>> 1305 -25 1.2 4028 @ CQ WO4R EM74 ~United States
      >>>
      >>> 1305 -25 1.1 4148 @ CQ WO4R EM74 ~United States
      >>>
      >>> 1305 -25 1.1 4268 @ CQ WO4R EM74 ~United States
      >>>
      >>> 1305 -22 1.2 4388 @ CQ WO4R EM74 ~United States
      >>>
      >>> 1305 -17 1.5 268 # CQ UA1ZGI KP57 ~E.pean Russia
      >>>
      >>> 1305 -17 1.4 995 # VU2TRI HB9ARI JN37
      >>>
      >>> 1305 -1 1.1 1225 # RW9YE VO1OR GN29
      >>>
      >>> 1305 -5 1.1 1406 # CQ KF4RWA EM63 ~United States
      >>>
      >>> ----------------------------------------
      >>>
      >>> 1306 -8 1.1 800 # N1CPL K4KQZ R-03
      >>>
      >>>
      >>>
      >>> ----------------------------------------
      >>>
      >>> 1307 -26 1.1 2828 @ JA3CG WO4R -13
      >>>
      >>> 1307 7 1.1 3068 @ JA3CG WO4R -13
      >>>
      >>> 1307 -16 1.4 995 # VU2TRI HB9ARI JN37
      >>>
      >>> 1307 -2 1.1 1225 # RW9YE VO1OR GN29
      >>>
      >>> 1307 -7 1.1 1406 # CQ KF4RWA EM63 ~United States
      >>>
      >>> ----------------------------------------
      >>>
      >>> 1308 -1 1.1 800 # TU 5W OCF 73
      >>>
      >>> 1308 -1 1.1 1407 # KF4RWA KD0PMW EM48
      >>>
      >>>
      >>>
      >>>
      >>> ------------------------------------
      >>>
      >>> To unsubscribe, send an email to:
      >>> mailto:wsjtgroup-unsubscribe%40yahoogroups.com
      >>>
      >>> WSJTGroup Homepage --> http://www.wsjtgroup.org/
      >>>
      >>>
      >>>
      >>>
      >>>
      >>> Yahoo! Groups Links
      >>>
      >>>
      >>>
      >>>
      >>
      >
      >
      >
      >
    • wa4mit
      These signals are all multiples of +60 one would have to think this is related to 60hz AC getting into the transmit signal somehow. I have seen a lot of 60hz
      Message 2 of 11 , Aug 31, 2013

        These signals are all multiples of +60 one would have to think this is related to 60hz AC getting into the transmit signal somehow. I have seen a lot of 60hz modulation of PSK signals this usually resulted in unmodulated carries spaced out 120hz from the offending signal. I really don`t recall any modulation on the spurious carries with PSK. 73 Morris



        --- In wsjtgroup@yahoogroups.com, <lists@...> wrote:

        The important thing will be to make sure the station you test with
        has a low local noise and receives a "0dB" or stronger signal from
        you.

        These "spurious" reports almost always report the "secondary" signals
        are between 20 and 30 dB weaker than the main signal. Thus, if the
        decode limit of the software is -20 to -25 dB, the primary signal
        will need to be at least 0 dB or stronger before the secondary signals
        rise above the receive station's noise floor.

        73,

        ... Joe, W4TV


        On 8/30/2013 1:10 PM, Rudy Benner wrote:
        > Best thing to do is arrange a sked with someone you know and get him to record the exchange, then have him send you the files.
        > You can then make your own conclusions.
        > Better yet, do this with more than one station.
        >
        > Monitoring 20 meters right now.
        >
        > ve3bdr rudy
        >
        > From: wo4r_jeff
        > Sent: Thursday, August 29, 2013 8:46 PM
        > To: wsjtgroup@yahoogroups.com
        > Subject: [wsjtgroup] Re: Multi Receives Mystery WSJT-X v1.2 r3563 JT alert x 2.4.8
        >
        >
        > Since my signal is being discussed has anyone else noticed these multi decodes. If I have a problem I need to know so I can get it fixed.
        >
        > WO4R Jeff
        >
        > --- In mailto:wsjtgroup%40yahoogroups.com, "Joe Subich, W4TV" <lists@...> wrote:
        >>
        >>
        >> Those are spurs - either on the transmitted signal or being generated
        >> in your sound card. Note the first spur is ~24 dB below the "primary"
        >> signal and they are multiples of 60 (120) Hz away.
        >>
        >> Either WO4R (and ND4Q) has a significant level of 120 Hz power supply
        >> hum on his signal or your sound card has a 120 Hz ripple that gets
        >> mixed with very strong signals (signals > ~-3 dB). It is not possible
        >> to tell for sure whether these are transmit or receiver generated
        >> spurs based on the small sample since they are observed on WO4R and
        >> ND4Q but not VO1OR at a similar signal level. Only more monitoring
        >> will be able to sort out the source.
        >>
        >> 73,
        >>
        >> ... Joe, W4TV
        >>
        >>
        >> On 8/29/2013 9:19 AM, e.carletta wrote:
        >>>
        >>> Anybody know why this occurs ?
        >>> Same Calls different freq's , different sig levels.
        >>> Are these op's working split?
        >>>
        >>> Mike/K2OI
        >>>
        >>>
        >>> -
        >>>
        >>> 1259 -23 1.2 2905 @ JN1JYD WO4R EM74
        >>>
        >>> 1259 1 1.2 3265 @ JN1JYD WO4R EM74
        >>>
        >>> 1259 -22 1.3 3625 @ JN1JYD WO4R EM74
        >>>
        >>> 1259 -24 1.2 4225 @ JN1JYD WO4R EM74
        >>>
        >>> 1259 -11 1.2 417 # AD7MQ VO1OR -10
        >>>
        >>> ----------------------------------------
        >>>
        >>> 1301 -24 1.2 2904 @ JN1JYD WO4R R-20
        >>>
        >>> 1301 -24 1.1 3024 @ JN1JYD WO4R R-20
        >>>
        >>> 1301 0 1.2 3264 @ JN1JYD WO4R R-20
        >>>
        >>> 1301 -24 1.2 3504 @ JN1JYD WO4R R-20
        >>>
        >>> 1301 -25 1.2 4225 @ JN1JYD WO4R R-20
        >>>
        >>> 1301 -6 1.2 417 # AD7MQ VO1OR RRR
        >>> 1303 -23 1.2 3144 @ JN1JYD WO4R 73
        >>>
        >>> 1303 5 1.2 3264 @ JN1JYD WO4R 73
        >>>
        >>> 1303 -22 1.1 3504 @ JN1JYD WO4R 73
        >>>
        >>> 1303 -21 1.2 3624 @ JN1JYD WO4R 73
        >>>
        >>> 1303 -23 1.2 4224 @ JN1JYD WO4R 73
        >>>
        >>> 1303 -23 1.2 4344 @ JN1JYD WO4R 73
        >>>
        >>> 1303 -24 1.2 4464 @ JN1JYD WO4R 73
        >>>
        >>> 1303 -6 1.1 417 # RR 73GL VO1OR
        >>>
        >>> 1303 -16 1.4 995 # BG5JND N2MGT FN13
        >>>
        >>> ----------------------------------------
        >>>
        >>> 1304 -1 1.2 1757 # WB9RAS ND4Q EM64
        >>>
        >>> 1304 -21 1.2 1997 # WB9RAS ND4Q EM64
        >>>
        >>> 1304 -20 1.2 2117 # WB9RAS ND4Q EM64
        >>>
        >>> 1304 -21 1.2 3077 # WB9RAS ND4Q EM64
        >>>
        >>> ----------------------------------------
        >>>
        >>> 1305 -22 1.1 2708 @ CQ WO4R EM74 ~United States
        >>>
        >>> 1305 -23 1.1 2828 @ CQ WO4R EM74 ~United States
        >>>
        >>> 1305 -22 1.1 2948 @ CQ WO4R EM74 ~United States
        >>>
        >>> 1305 4 1.1 3068 @ CQ WO4R EM74 ~United States
        >>>
        >>> 1305 -23 1.2 3188 @ CQ WO4R EM74 ~United States
        >>>
        >>> 1305 -23 1.1 3308 @ CQ WO4R EM74 ~United States
        >>>
        >>> 1305 -22 1.1 3428 @ CQ WO4R EM74 ~United States
        >>>
        >>> 1305 -25 1.2 4028 @ CQ WO4R EM74 ~United States
        >>>
        >>> 1305 -25 1.1 4148 @ CQ WO4R EM74 ~United States
        >>>
        >>> 1305 -25 1.1 4268 @ CQ WO4R EM74 ~United States
        >>>
        >>> 1305 -22 1.2 4388 @ CQ WO4R EM74 ~United States
        >>>
        >>> 1305 -17 1.5 268 # CQ UA1ZGI KP57 ~E.pean Russia
        >>>
        >>> 1305 -17 1.4 995 # VU2TRI HB9ARI JN37
        >>>
        >>> 1305 -1 1.1 1225 # RW9YE VO1OR GN29
        >>>
        >>> 1305 -5 1.1 1406 # CQ KF4RWA EM63 ~United States
        >>>
        >>> ----------------------------------------
        >>>
        >>> 1306 -8 1.1 800 # N1CPL K4KQZ R-03
        >>>
        >>>
        >>>
        >>> ----------------------------------------
        >>>
        >>> 1307 -26 1.1 2828 @ JA3CG WO4R -13
        >>>
        >>> 1307 7 1.1 3068 @ JA3CG WO4R -13
        >>>
        >>> 1307 -16 1.4 995 # VU2TRI HB9ARI JN37
        >>>
        >>> 1307 -2 1.1 1225 # RW9YE VO1OR GN29
        >>>
        >>> 1307 -7 1.1 1406 # CQ KF4RWA EM63 ~United States
        >>>
        >>> ----------------------------------------
        >>>
        >>> 1308 -1 1.1 800 # TU 5W OCF 73
        >>>
        >>> 1308 -1 1.1 1407 # KF4RWA KD0PMW EM48
        >>>
        >>>
        >>>
        >>>
        >>> ------------------------------------
        >>>
        >>> To unsubscribe, send an email to:
        >>> mailto:wsjtgroup-unsubscribe%40yahoogroups.com
        >>>
        >>> WSJTGroup Homepage --> http://www.wsjtgroup.org/
        >>>
        >>>
        >>>
        >>>
        >>>
        >>> Yahoo! Groups Links
        >>>
        >>>
        >>>
        >>>
        >>
        >
        >
        >
        >
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