Re: LF: Cats among pigeons

[Andy Talbot <andy.g4jnt@gmail.com>]

Does Av mean average power, ie 50% of peak Tx ?

Andy 'jnt

On 12 February 2012 09:42, Albert <westberg@xs4all.nl> wrote:
> Hello all Opera lovers,
>
> Testing Opera speed op1 till op32 under "lab" conditions without the real
> world phenomena like fading and QRN.
> The results:
> 1. if you have solid Opera decodes the received SNR stays the same when
> switching between opera speeds;
> 2. the only change is the minimum level where decodes are still possible.
> After a large number of test transmissions I gathered the following results.
>
> Op1   decode @ -24dB Av
> Op2   decode @ -27dB Av
> Op4   decode @ -30dB Av
> Op8   decode @ -33dB Av
> Op32 decode @ -37dB Av
>
> Test set up: TX Flex 1500, 0.2 mw output, attenuators Bird and HP > 120 dB,
> min. step 1 dB, RX Flex 5000, Software Opera v.1.2.8 Windows 7 64.
>
> 73, Albert PA0A
>
>
>