VSWR Meter dB scale Vs. SWR Scale

[vinodquilon]

In the figure shown below, SWR Meter is using in two different
scenarios. First one for SWR measurement and second one for
dB measurement.

In SWR meter, same needle rolls on two scales simultaneously.
There is no any front panel controls to switch between dB and
SWR scales.

Then how can I confirm the first setup is for SWR and second
is for dB ?

In short, my doubt is that-Whether it indicates input VSWR or
feeding power of Horn antenna in the first case on SWR Meter ?


**broken link removed**

 

[Reloadron]

The meter pictured I am 99% sure is an old HP 415 series, the last of the series being the 415E I believe. If you Google HP415E you will get hits like this one. Plus other hits explaining each setup in detail. I used that meter extensively back in the late 70's and early 80's which was the last I worked with microwave. Really a classic meter of the day.

On page 9 of the link you will see just about the same image you posted with explanations.

Ron