IFR COM-120C, Operation Manual

Page: 114 / 326

4-41
SECTION 4
OPERATION
4-2-5 AM MODULATION METE R OPE RATION
T h e A M M o d u l a t i o n M e t e r f o r t h e R F R e c e i v e r m e a s u r e s A M M o d u l a t i o n f o r a n R F
S ig n a l. F i l t e r i n g , f o r t h e si g n a l p a s s e d t o t h e A M M o d u la t io n M e t e r , i s p r o v i d e d b y t h e
A u d i o / D a t a F i l t e r s .
C o n f i g u r e a n d o p e r a t e t h e A M M o d u l a t i o n M e t e r a s f o l l o w s :
ZOOM
D i s p l a y s f u l l s c r e e n A M M o d u l a t i o n M e t e r .
o
E n t e r R F a s r e q u ir e d .
OTe
n
E d i t in g R F f i e ld a f f e c t s l e ve l o n R F R e c e i ve O p e r a t i o n S cr e e n .
S e l e c t R a n g e a s f o l l o w s :
40%
S e l e c t s 4 0 % r a n g e .
100%
S e l e c t s 1 0 0 % r a n g e .
AUTO
S e l e c t s A u t o r a n g e f o r R a n g e .
I f P e a k H o l d F u n c t i o n i s d e s i r e d , t a k e
m e t e r o u t o f A u t o r a n g e a n d c o n f i g u r e a s
f o l l o w s :
OFF/ON
T o g g l e s P e a k H o l d F u n c t i o n O N o r O F F .
RST PK
R e s e t s P e a k H o l d F u n c t i o n .
I f A v e r a g e F u n c t i o n i s d e s i r e d , c o n f i g u r e
a s f o l l o w s :
OFF/ON
T o g g l e s A v e r a g e F u n c t i o n O N o r O F F .
C u r s o r t o S a m p l e N u m b e r t o e n t e r
d e s i r e d v a l u e . R a n g e i s 2 t o 1 0 .
MODULATION
100 % 0 %
83.1 %
AM MODULATION METER
105.0000 MHz
MOD METERS
ON
ON
ON
OFF
RF:
Source:
Peak Hold:
Average:
Upper Limit:
Alarm:
Lower Limit:
ON
Range:
100 %
10.00
90.00
2
Peak Hold:
Average: ON
ON
2
Average:
Upper Limit: ON
ON
28.0
2