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SECTION 4 OPERATING INSTRUCTIONS
4.6.3 Setting the Modulation Factor and Frequency Deviation
You set an AM modulation factor or FM frequency deviation by operating the number keys, step keys and the rotary
knob.
Pressing the [Modulation] key in the Entry zone turns on the lamp of the [Modulation] key and the Modulation lamp
of the Edit zone, allowing to set an AM modulation factor or FM frequency deviation via the step keys and rotary
knob in the Edit zone.
You select an AM modulation factor or FM frequency deviation in the "Modulation" menu opened by pressing the
[Modulation] key. The AM modulation factor or FM frequency deviation set in this way is applied to the modulation
of the item currently selected. Therefore, select a modulation function after moving the set item.
(1) Setting by number keys
You use the number keys to enter numeric values and units.
(2) Setting by step keys
You operate the step keys [^][∨] to step up or down an AM modulation factor or FM frequency deviation.
The step size becomes as follows for each modulation:
• AM modulation factor : The step size is fixed to 10 %.
• FM frequency deviation : A frequency deviation is doubled by a step-up increment, or reduced to 1/2 by a step-
down decrement.
(3) Setting by rotary knob
Turning the rotary knob raises or lowers the AM modulation factor or FM frequency deviation.
The resolution assumes the lowest position of the display both in AM modulation factor and FM frequency deviation.
MG3641A/MG3642A front panel
[Modulation] key