Anritsu MG3641A User Manual

SECTION 4 OPERATING INSTRUCTIONS

4-26

4.7.3

External Modulation Signals (Ext1, Ext2)

Ext1 and Ext2 apply modulation using external signals supplied to the "Ext1" and "Ext2" connectors (600

impedance) of Mod Input on the front panel.

The AM modulation factor or FM frequency deviation matches the relevant preset value, when the external signals

applied to the "Ext1" and "Ext2" connectors assume a level of 2 Vp-p. Adjust the external signal level in such a

manner that the "

" and " " lamps located to the right of the "Ext1" and "Ext2" connectors, respectively, will both

go out.

If the

lamp lights: The input level is too low. Raise the input level.

If the

lamp lights: The input level is too high. Lower the input level.

If the frequency of the modulation input signal is 100 Hz or less, adjust the signal level so that

and

alternately

turns ON.

MG3641A/MG3642A front panel

Mod Input

Ext1

Ext2

600Ω
2Vp–p