Ceyear 3680A, Quick Start Manual, Page: 18 / 32

Quick Start Guide for 3680A/B Cable and Antenna Analyzer
Open / Short
Figure 3.9 Cable Loss Test Connection Diagram
Cable loss curve of the measured cable can be obtained through above steps. The so-called average loss
refers to average the measured extreme values of loss. Users can use
【
Marker
】
to find peak value and
valley value of the loss curve, then average them, and finally obtain the average loss of the cable. Limit
value search process is as follows:

Press
【
Marker
】
to enter the marker menu, and the Marker 1 defaults to be in open state at this time;

Select [Peak] menu to place Marker 1 onto the peak position of the cable loss curve;

Select [Marker 1 2 3 4 5 6] menu again, the menu becomes into [Marker 1 2 3 4 5 6] at this time, and
then select [Marker Off On] menu to open Marker 2;

Select [Valley] menu to place Marker 2 onto the peak position of the cable loss curve;

Upon the cable loss values shown by Marker 1 and Marker 2, sum and average them to obtain average
loss of the cable.