Dual Harmonic Reference Channel Menu - Ametek 7124 Instruction Manual

Precision lock-in amplifier
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Chapter 5, FRONT PANEL OPERATION

5.6.03 Dual Harmonic Reference Channel Menu

5-84
to both harmonics. Although the full-scale sensitivity setting can be independently
set for both harmonics, the maximum AC Gain that is possible is defined by the
least sensitive setting of the two.
In dual harmonic mode, the reference channel is controlled by the Dual Harmonic
Reference menu, which differs from the Reference Channel menu used in the other
three modes. In addition, controls are needed for the corresponding output channels,
and so the Output Filters and Output Offset and Expand sub-menus also change. The
relationship of all these menus to Main Menu 1 is shown in figure 5-64. Note that as
with the main menu structure, shown in figure 5-1, it is possible to return to the Main
Display from any menu by pressing the Previous Menu key, but this has been
omitted from figure 5-64 for the sake of clarity.
Figure 5-64, Dual Harmonic Mode Menu Structure
In dual harmonic mode, pressing a key adjacent to the Reference Channel item on
Main Menu 1 accesses the Dual Harmonic Reference menu, shown in figure 5-65.

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