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Author Topic: Are BT tying me down.  (Read 6106 times)

farmergiles

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Re: Are BT tying me down.
« Reply #15 on: December 17, 2007, 11:28:41 PM »

Many thanks.

I'm sure there used to be a calculator in Windows that let you change numbers to Hex and Hex to decimal nos.
I used it a few years ago when I was putting in numbers into my sat receiver (non Sky) to get foreign channels.
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Pwiggler

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Re: Are BT tying me down.
« Reply #16 on: December 18, 2007, 07:42:46 AM »

there still is ..... Start > All programs > Accoessories > Calculator

or Start > run > and type CALC.exe

then click View > Scientific > type in your Dec number then click on the Hex button near the top, or vice-versa.

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Paul

roseway

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Re: Are BT tying me down.
« Reply #17 on: December 18, 2007, 08:49:54 AM »

I can understand people having a preference for the decimal numbers they're familiar with, but I'm not sure that it helps in this case. The numbers which you enter in the 00 box are two digit numbers, and the second digit must always be 0 or 8. So start off with a middling value, say 50, then resync and see what downstream noise margin (SNRM) results. Depending on this result, try higher or lower values until you get the result you want. Smaller values give you a lower noise margin.

As a rough rule of thumb, a change of value by the smallest increment, e.g. from 50 down to 48, will change the noise margin by about 0.5 dB.
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  Eric
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