Mini-Circuits ISC-2425-25+ Quick Start Manual page 14

Conveniently, the ISC-2425-25+ board provides a method that tracks the processing frequency as the match changes
over time: this is called the "digital locked loop" (DLL). The next few paragraphs describe the usage of this DLL feature.
(see Apps Note: "appsNote DLL")
Perform an S11 frequency sweep to determine the starting frequency for the DLL algorithm

The sweep indicates the best match frequency has shifted towards 2440MHz, where the reflection value is a mere 6.6%.
Please note that the reflection at the previously configured 2470 MHz has increased to almost 34% in the meantime.
To enable the real time tracking, we will enable the DLL algorithm to do the frequency tracking for us.
Go to the DLL menu

Configure the start frequency to 2440 MHz

Press the DLL enable button in the bottom right corner of the GUI to turn on the DLL.

Enable RF output.

The DLL is now enabled and is tracking the optimum S11 frequency as the material heats.
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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