- Setting up the device
1.1 Setting the measurement range
Press the “Menu” button to enter the main interface. After pressing the “Menu” button, select the “Frequency” section.
“Center” – the central frequency in the measurement range (Most often, the frequency to which the tuning will be performed is selected).
“Spam” – the width of the measurement range (400 MHz is recommended, 200 MHz above and below the frequency to which we want to tune the antenna).
“Start” – the frequency from which the measurement will begin.
“Stop” – the frequency at which the measurement will end.
“Points” – the number of points at which the device makes measurements (the more, the more accurate the measurement, but the speed of updating the measurements decreases).
“BW” – selection of the bandwidth of the digital intermediate frequency (IF) filter.
1.2 Setting up pointers on the graph.
Press the “Menu” button to return/enter the main interface.
After pressing the “Menu” button, select the “Markers” section
- In the “Type” column, select SWR.
- In the “Frequency” column, enter the required frequency at which you plan to use the antenna.
- In the “off/on” column, move the slider to the on position.
1.3 Setting up the required graphs
Press the “Menu” button several times to return to the measurement graphs.
Then, using the upper arrow buttons, switch to the screen labeled “SWR” in the lower right corner. (If the screens with graphs do not switch, press the “Plot” button and try again).
We will evaluate the antenna by the Standing Wave Ratio. To simplify things extremely, the value shows the degree of antenna matching. Roughly, what amount of energy will be sent towards the receiver in relation to what will return back to the transmitter (will be wasted). The lower the SWR value, the more efficient the antenna (minimum SWR value = 1).
In the upper left corner of the screen, you will see the quantitative designation of the Standing Wave Ratio (SWR) at the frequency you selected. Also on the graph itself, you will see a check mark, which is fixed along the horizon and corresponds to the selected frequency.
- The antenna is considered to be working if the SWR value at the required frequency is less than 2.
- The antenna is considered good if the SWR value at the required frequency is less than 1.5.
- Measurement example
At the target frequency of 750 MHz, the antenna SWR is 1.32 (photo), which means that the antenna will be efficient.
📎 Instructions with photos for each action and element of the device have been added to the cloud.
