2) Select the modulation source.
To input an e x t e r n a l modulation s i g n a l , press the EXT key ® . To use
the i n t e r n a l modulation s i g n a l , press e i t h e r the 1kHz key ® or the
400Hz key (fP. To use an external modulation, press the EXT key ® , turn
o f f the FM modu1 at i on, and apply approx. 3Vp-p from the EXT AM
MODULATION input terminal (9) so that the EXT HIGH/LOW i n d i c a t o r © no
more displays HIGH or LOW.
4-3-2-1 Normal S e t t i n g
Use the same procedure as for FM modulat ion sett ing.
Refer to Section 4-3-1-1.
4-3-2-2 Di rect Setting
Use the same procedure as for FM modulat ion sett ing.
Refer to Section 4-3-1-2.
* Input values exceeding the AM MODULATION r a t i n g s (0. 0 — 9 9 . 9%) cannot be
set. The sett ing resolut ion for both normal and d i r e c t sett ing i s 0.1%.
4-3-2-3 Preset S e t t i n g
Use the same procedure as for FM modulat ion sett ing.
Refer to Section 4-3-1-3.
This feature makes i t easy to set AM modulation to 30% or 60% or 99. 9%.
4-3-3 SIMULTANEOUS FM/AM SETTING
Act i v a t e t h e FM key ® and AM key © to app1y FM and AM m o d u l a t i o n
simultaneously. The MODULATION d i s p l a y w i l l only show e i t h e r the AM or FM
modulat ion amplitude at a time. To enter an FM or AM value which i s not
c u r r e n t l y d i s p l a y e d , press the FM/AM key ® to toggle the modulat ion unit
LED to kHz ( i f the FM modulat ion c u r r e n t l y d i s p l a y e d ) or to % ( i f the AM
modulat ion i s c u r r e n t l y d i s p l a y e d ) . Then enter the value by typing numerals
or v i a the rotary encoder.
The FM and AM modulat ion can simultaneously be turned ON or OFF simply by
pressing the MODULATION key ® .
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