Dual Harmonic Output Filters Menu - Ametek 7124 Instruction Manual

Chapter 5, FRONT PANEL OPERATION

5.6.04 Dual Harmonic Output Filters Menu

5-86
and 127th. Adjustment is faster using the Keypad or Active Cursor controls - see
section 4.1.04.
HARMONIC 1 PHASE and HARMONIC 2 PHASE
These two controls allow the reference phase of harmonic
independently adjusted over the range -180° to +180° in 10m° steps. Adjustment is
faster using the Keypad or Active Cursor controls - see section 4.1.04.
The Auto-Phase1 and Auto-Phase 2 functions (see section 5.6.08) also affect the
settings of these controls.
Pressing the Previous Menu key returns control to Main Menu 1.
In dual harmonic mode, pressing the Output Filters key on Main Menu 1 access the
Dual Harmonic Output Filters Menu, shown in figure 5-66.
Figure 5-66, Dual Harmonic Output Filters Menu 1
The Dual Harmonic Output Filters Menu 1 has four controls affecting the
instrument's output low-pass filters, and a key to access Output Filters Menu 2.
Changes to the setting of these controls can be made by using the adjacent
keys.
The controls operate as follows:-
TIME CONSTANT 1
This control, which duplicates the Main Display control of the same name, is used to
set the time constant of each of the output filters.
SLOPE 1
The roll-off of the outputs filters can be set, using this control, to either 6 dB or
12 dB per octave (Fast time constant mode) or 6 dB, 12 dB, 18 dB or 24 dB per
octave (Normal time constant mode).
SYNC TIME CONSTANT
This control has two settings, as follows:-
OFF
In this setting, which is the normal mode, time constants are not related to the
reference frequency period.
and harmonic to be
1 2