User Manual

SARK-110-ULM User’s Manual

Rev 1.0 June 22

4 Special Functions

4.1 Transmission Line Add/Subtract

The SARK-110-ULM provides the capability of subtracting a length of transmission line

(transpose to load) or adding a length of transmission line (transpose to input). Use the

subtraction feature to discount the effect of the feed line so the measurements will be as if the

analyzer were connected at the antenna feed point. Use the addition feature for simulating the

effect of a feed line.

The transmission line type has to be known in advance. The device provides a comprehensive

list of cable types and in addition the user can specify up to three custom cable types. The

selection of the cable is available in the «Cable Type» option of the Setup menu, see the

screenshot below:

For setting the length, select «TL LEN» option in the Function menu.

A pop-up dialog will show the coefficients of the selected cable type.

Enter the transmission line length. Use negative quantities for Subtract operations (transpose to

load) and positive quantities for Add operations (transpose to input). Notice that the length can

be changed using up and down arrow buttons when “TL LEN” function is selected.