[hpsdr] Pennylane output power

[Phil Harman]

Hi John,

Yes, you can use the Gain by Band settings with both Penelope and PennyLane.

The power output on PennyLane is adjusted by varying the power out from
the DAC rather than varying the amplitude of the I & Q signals. That way
the full 16 bits are used at every power level which maintains the maximum
S/N ratio.

We also split the PA stage into two sections which is the reason for
higher, and more consistent, power output across the spectrum.

73 Phil...VK6APH




> ***** High Performance Software Defined Radio Discussion List *****
>
> All,
>
>
>
> One more time:  Is it now satisfactory to adjust Pennylane's output power
> using the Gain by Band settings in the PA Setting tab without degrading
> the
> S/N ratio of the transmitted signal?
>
>
>
> Have successfully installed Pennylane using both Bill's and Doug's,W5WC,
> consoles.  Pennylane makes substantially more output power across the
> spectrum than Penelope does.  Have the input ranges of my programmable
> external attenuator module set up for Penelope's power output levels.  It
> would be so much easier for me to simply adjust the Gain by Band settings
> to
> place the Pennylane output in that same range.
>
>
>
> Regards,
>
> John,W7FU
>
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