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CRO DISPLAY on Microwave Testbench

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vinodquilon

vinodquilon

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In the Microwave Testbench shown,
I am replacing VSWR Meter with another CRO.
Then, What would be the waveforms on two CROs ?

According to my prediction:
CRO at Detector Mount will indicate SQUARE WAVES( AM modulation set on MW source supply)
CRO at slotted line will indicate STANDING SINE WAVES tracked by the slotted line

Is it correct ?




 

There is an option for choosing between SQUARE WAVE AM & SWEEP WAVE FM MODULATION in Microwave power supply.
I have set it on AM.
Then modulated signals will be in SQUARE shape.What would be the shape of STANDING WAVES ?
Can I display these Standing Waves on CRO connected at Slotted end ?


Can I connect VSWR meter at the end of Detector Mount XD-451 to measure VSWR reading ?
 
Last edited:

I got the idea.

I am not displaying standing waves on an oscilloscope, a standing wave

is not a time-varying voltage.

The standing wave is a voltage which varies with the position along

the line.


One more doubt----- for 'peak' points of standing waves, SWR needle

moves to 'low' positive db gain values(towards right-max.needle

deflection). Similarly, for trough points of standing waves ,SWR

needle moves to peak positive db values(towards left).

Why this contradiction exists ?
 

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