Step 7 - Use The Digital Locked Loop (Dll) To Track The Best Match Frequency - Mini-Circuits ISC-2425-25+ Quick Start Manual

2.8 Step 7 – Use the digital locked loop (DLL) to track the best match frequency real time
With the right frequency and power configured, the RF output may now be switched on.
Note: Before turning on the RF output, ensure the RF cannot leak from the cavity. Press the
RF ON/OFF button to enable RF.
The material in the cavity is now being heated at the optimized frequency.
The GUI displays a forward power of 250W, a reflected power of 30W and a reflection value of 12%, meaning the material is
absorbing some 220W of RF energy. This is in line with the earlier sweep measurement.
2.9 Step 7 – Use the digital locked loop (DLL) to track the best match frequency
As the material continues to heat, its physical properties may start changing. Changes to the load can affect the quality of
the match: the best match frequency will shift to a different value. It is more than likely that after a while the match is
no longer optimal, and the load reflects too much energy back into the system. Obviously, this is not a desirable
situation.
To avoid straining the system with a poor match, turn off RF output for the time being.
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AN-50-001 Rev.: OR DCO-000695
This document and its contents are the property of Mini-Circuits.
(11/01/21) File: AN-50-001.docx
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