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E4419B   E4412A Attenuator measurement

Question asked by youcann on Dec 7, 2020

Hi,

i'm measuring the attenuation of a variable attenuator (ZX73-2500-S+). With supply voltage, control voltage and input power fixed and the frequency varied around 3GHz, i've measured the plot below.

 

plot

 

Is that expected when not changing the frequency setting of the E4419B?

If so, what does this setting do?

My setup:



  +-------------+    +------------+                         +--------------+
  | R&S SMC     |    |            +------------------------>+ChA           |
  | RF power-src+--->+ Splitter   |                         |     E4419B   |
  |             |    |            +-------+         +------>+ChB           |
  +-------------+    +------------+       |         |       +--------------+
                                          v         |
                                       +---------------+
                                       |               |
                                       |  Attenuator   |
                                       |               |
                                       +---------------+




Many thanks!

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