Sony ICF-EX5MK2 Manual page 10

ICF-­‐EX5MK2
Synchronous D etection C ircuit
MW ( Medium-­‐Wave) a nd R adio N IKKEI h ave m irror i mages o n t he t op ( UPPER) a nd
bottom ( LOWER) o f t heir c arrier s ignal, o r d ouble s ideband, r esulting f rom f requency b and
amplitude m odulation.
Beat i nterference f rom a djacent s tations o ften o ccurs i n o ne f requency b and o f t he d ouble
sideband s ignal. Y ou c an e xtract i nterference f rom a s ideband, t hrough t he S ynchronous
Detection C ircuit, s o c learer r eception m ay b e p ossible. T his i s a ccomplished t hrough t he
Sync/NORMAL s witch.
In t he i llustration b elow, t here i s i nterference f rom a n a djacent c hannel a bove t he c hannel
we w ish t o l isten t o ( shaded b lack).
Since t here i s i nterference i n t he U PPER s ideband d ue t o t he a djacent s tation, s et t he
Sync/NORMAL s witch t o t he L OWER s etting t o i solate t he L OWER s ideband a nd e xtract t he
UPPER s ideband ( with i nterference) f rom t he s ignal s o o nly t he l ower, o r L SB, i s r eceived.
AM S ENS ( AM S ensitivity) S witch
As y ou l isten t o M W ( Medium-­‐Wave) a nd R adio N IKKEI – a nd u nder n ormal c onditions -­‐
keep t he A M S ENS s witch o n t he H IGH ( high s ensitivity) s etting. W hen y ou a re l istening t o
very s trong r adio s tations, n earby s tations, o r a re g etting i nterference, m ove t he A M S ENS
switch t o t he L OW s etting.