Transmission Line Add/Subtract - SARK 110 User Manual

13 Transmission Line Add/Subtract

The SARK-110 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 SARK-110 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 menu «Setup» «Cable Type», see the
screenshot below:
The transmission line length has to be entered into the «TL Len» menu option within the Main
menu. Use negative quantities for Subtract operations (transpose to load) and positive quantities
for Add operations (transpose to input).
The pop-up edit dialog is activated by pressing the Select [■] button when the «TL Len» option
is active; see the screenshot below. The value is set by using Navigator B to adjust the digit at
each of the current length multiplier positions, shown in reverse video. The length multiplier
position can be changed using Navigator A. The length is validated by pressing the Select [■]
button. The setting is cancelled by pressing any other button. Note that the length value can be
set to zero by pressing the Save Screen [●] button
rd
Rev 1.2.6 October 3 , 2015
SARK- - - - 110 SARK 110
SARK SARK 110 110
- 52 - © Melchor Varela – EA4FRB 2011-2015
User's Manual