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Re: Understanding the 8753ES frequency loop


 

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Thank you.?

Is there a reference point and current?

Another words, X.XXX GHz at XXX.X mA?


Peter

On Mar 21, 2019, at 2:29 PM, pianovt via Groups.Io <pianovt@...> wrote:

Hi Peter,

You did a YTO swap, but it didn¡¯t help, right? I guess, unless you know that your spare YTO is good, the result may not be conclusive. Here is some additional YTO information for you:

The main coil sensitivity is 23 mA/GHz? (+/- 1 mA/GHz). At lower frequencies (3.8 to 5+ GHz), the YTO is pretty linear. If you draw a straight line between 3.8 and 5.5 GHz, the deviation should be less than 3MHz, if that. The FM coil sensitivity is around 230kHz/mA. Maximum allowed FM coil current is 150mA.

Vladan

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