Quick Start Guide for AV3680A Handled Cable & Antenna Tester
Press
【
FREQ/DIST
】
to enter the frequency menu; select [Start Freq] menu, then use the numeric keys,
knob or arrow keys to input the start frequency value and select the corresponding unit menu to complete
the input; the frequency in this example is set to 1MHz.
4. Similar to step 3, set the stop frequency needed by the measurement; the frequency in this example is set
to 4GHz.
5. According to the section 1 in chapter 3, calibrate at port 1 of the instrument;
6. After the Port 1is calibrated, connect the measured cable to the Tester to ensure the accuracy of cable
loss measurement. Terminal of the measured cable shall connect to the open circuit or short circuit, as
shown in Figure 3.12.
Open/Short
Figure 3.12 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 1defaults 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 2onto 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.
3.2.3 DTF Measurement
