1-3
SECTION 1
INTRODUCTION
1-3
RF RECEIVE OPERATION
Receiving
T h e C O M - 1 2 0
C
r e c e i v e s C W a n d m o d u l a t e d s i g n a l s r a n g i n g f r o m 2 5 0 k H z t o 1 0 0 0 M H z .
I n a d d i t i o n t o s i n g l e f r e q u e n c y o p e r a t i o n , t h e C O M - 1 2 0
C
d e m o d u l a t e s a n d d e t e c t s A M ,
F M a n d P M m o d u l a t e d s i g n a l s a n d e x e c u t e s d e f i n e d f r e q u e n c y s w e e p o p e r a t i o n s b y
s c a n n i n g a r a n g e o f p r e d e t e r m i n e d F r e q u e n c y L i s t s e t t i n g s .
T h e C O M - 1 2 0
C
r e c e i v e s “ o f f - t h e - a i r ” s i g n a l s v i a t h e A n t e n n a C o n n e c t o r o r c o n n e c t s
d i r e c t l y t o t h e U n i t U n d e r T e s t v i a t h e T / R C o n n e c t o r .
Meters
R e c e i v e O p e r a t i o n M e t e r in g f u n c t i o n s i n c l u d e R F P o w e r , A M M o d u l a t i o n , F M D e v i a t i o n ,
P h a s e M o d u l a t i o n , D i s t o r t i o n , F r e q u e n c y E r r o r , A F F r e q u e n c y , R e c e i v e d L e v e l a n d
SI N AD .
F u l l O s c i l l o s c o p e a n d S p e c t r u m A n a l y z e r o p e r a t i o n i s a v a i l a b l e .
Testing
T e s t i n g i n R F R e c e i v e O p e r a t i o n i n c l u d e s m e a s u r i n g C a r r ie r P o w e r , M o d u l a t i o n ,
D i s t o r t i o n , S I N A D a n d R F F r e q u e n c y E r r o r .
U s e t h e i n d e p e n d e n t A u d i o / D a t a / S i g n a l i n g G e n e r a t o r s t o
m o d u l a t e t h e U n i t U n d e r T e s t w h e n p e r f o r m i n g R F R e c e i v e
O p e r a t i o n .
OTe
n
Summary of Contents for COM-120C
Page 1: ...comMQRPc c š ƒ o ƒ mƒ šƒ QPPRMPVPQMRpP advancing wireless test s m ...
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Page 318: ...USER REPLACEABLE BATTERY AND FUSES BATTERY VOLTAGE FUSE INSTRUCTIONS ...