[hpsdr] Penelope output.

[Neal Campbell]

If you are using PowerSDR there is a setting in the Setup menus about
the tune power (its normally 10 watts on a 100 watt device so I expect
its 10%.

Neal Campbell
Abroham Neal Software
Programming Services for Windows, OS X and Linux
www.abrohamnealsoftware.com
(540) 242 0911




On Sun, Jun 14, 2009 at 6:57 AM, Chris Smith<chris at vspl.co.uk> wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Ah! Wait a moment. This test was done using the TUN button in the software.
> Does this put out a reduced power level?
>
> Chris
> G4NUX
>
>
> On 14 Jun 2009, at 11:24, Chris Smith wrote:
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Help!
>>
>> I've just got around to doing some tests with Penny:
>>
>> With the HPSDR software settings jacked up to 38dB, which I believe gives
>> maximum output at the antenna socket, with a scope I'm measuring 4V p-p into
>> a 50 ohm dummy load.
>>
>> Now it's a while since I stirred my one remaining grey cell into action
>> but I believe this equates to approx 40mW output which is what the power
>> meter is showing. Any higher settings in the software give lower output
>> figures. Am I doing something wrong in my calculations or have I got a
>> problem with Penny or a setting somewhere?
>>
>> P-P / 2 = 2V     :    2 x 0.707 = 1.414 (V RMS)  :  P = V^2 / R
>> 1.414^2 / 50 = 0.04W    or   40mW
>>
>> 73
>> Chris
>> G4NUX
>>
>>
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