IFR COM-120C, Operation Manual

Page: 83 / 326

4-10
SECTION 4
OPERATION
o
If External Modulation Operation i s d e s ir e d , p ress F6 to select EXT Modulation Source
and cursor to OFF.
S e l e c t t h e d e s i r e d M o d u l a t i o n T y p e :
OFF
M o d u l a t i o n O F F .
AM
F o r A M M o d u l a t i o n .
FM
F o r F M M o d u l a t i o n .
PM
F o r P M M o d u l a t i o n .
SET
P r e s e r v e s s e t t i n g s .
I f F M M o d u l a t i o n i s s e l e c t e d , s e t D e v i a t i o n R a n g e a s f o l l o w s :
NAR 3
F o r De via tio n Ra nge set ti ng fo r de vi at ion
< 2 kHz.
NAR 2
F o r D e v i a t i o n R a n g e s e t t i n g f o r d e v i a t i o n
2 k H z t o 1 2 . 7 5 k H z .
NAR 1
F o r D e v i a t i o n R a n g e s e t t i n g f o r d e v i a t i o n
1 2 . 7 5 k H z t o 2 5 k H z .
WIDE
F o r D e v i a t i o n R a n g e s e t t i n g f o r d e v i a t i o n
>
2 5 k H z . D e v i a t i o n R a n g e a u t o m a t i c a l l y
s e t s t o W I D E i f t o t a l d e v i a t i o n o f F M
s o u r c e s e x c e e d s 2 0 k H z .
Mod Src:
Dev Range:
Deviation: EXT
NAR 3
FM
1.00 kHz
Mod Src:
Dev Range:
Deviation: EXT
NAR 3
FM
1.00 kHz