[hpsdr] Penny PTT unkeying spike - T/R sequencing?

[Phil Harman]

Hi John,

This is a problem in PowerSDR which we found whilst testing PennyLane.

For now do not reduce the Gain per Band to below 40.9bB.  Below this
PowerSDR can send I&Q levels that exceed the 16 bit range of values we can
accept. This mostly happens with the CMPDR on.

Bill, KD5TFD, has fixed this and it will be included in his next release
as will Doug, W5WC, next version.

73 Phil...VK6APH




> ***** High Performance Software Defined Radio Discussion List *****
>
> Tom,
>
>
>
> I feel your pain.  My HPSDR transceiver has been on the air for over 1
> year
> now, with none of the problems that you have experienced.  That said, I'd
> like to offer an observation of an anomaly with my Penelope that may add
> to
> your thinking about your problem.
>
>
>
> If the drive in the <PA menu> is set to the "38" value, while in the key
> down, steady state, CW mode, significant picket fence spurs  start 2 KHz
> either side of the carrier.  The initial spur is down about -40 dBc.  The
> remainder of the spurs diminish and vanish about 20 KHz either side of the
> carrier.  If the drive in the <PA menu> is reduced to "39" or greater
> there
> are no spurs to detectable to -100 dBc.  The Penelope output amplifier has
> been replaced with no change in this anomaly.
>
>
>
> Regards,
>
> John Petrich, W7FU
>
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