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Re: LF: Cats among pigeons

To: [email protected]
Subject: Re: LF: Cats among pigeons
From: Albert <[email protected]>
Date: Sun, 12 Feb 2012 10:42:55 +0100
In-reply-to: <[email protected]>
References: <[email protected]> <C58324464DB74908908940561AD41698@AGB> <[email protected]> <A8B9B40838544BDD964CE6620E37E211@AGB> <[email protected]> <1659D80990BC4B5482FF78B6249AACAF@JimPC> <CAA8k23Tm568=ju4uX0U7SS=6xwfoR+rzROKWX6vZX0qGFc=2vQ@mail.gmail.com> <[email protected]>
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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




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