Communication-concepts AN758 Uživatelský manuál stáhnout pdf (Strana 12)

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PRODUCT TRANSFERRED TO M/A–COM

AN758

12 RF Application Reports

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  

  

  

 



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 

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  

  

 

 Ω

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  

 

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  

 

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



  

  

Figure 16. For two tone operation, a signal from an external audio oscillator is added to a signal from the T-4XB

built-in oscillator, which has been adjusted to 800 Hz.

During single tone testing, the external oscillator (1200 Hz) is switched off . A calorimeter wattmeter in the output can

be used to calibrate the HP-432A’s at frequencies below [ 10 MHz, where their response roll-off begins.

η 

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  

 

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   

 

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   

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    

Figure 17. VSWR and Efficiency versus Frequency

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

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

 

 

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Figure 18. IMD versus Power Output

Figure 19. Photo of Spectrum Analyzer Display

Showing the IMD Products to the 9th Order. Power

Output = 1 kW at 30 MHz (50 V).

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 

    

  

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Figure 20. IMD versus Frequency

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