ICF-‐EX5MK2
Synchronous Detection Circuit
MW (Medium-‐Wave) and Radio NIKKEI have mirror images on the top (UPPER) and
bottom (LOWER) of their carrier signal, or double sideband, resulting from frequency band
amplitude modulation.
Beat interference from adjacent stations often occurs in one frequency band of the double
sideband signal. You can extract interference from a sideband, through the Synchronous
Detection Circuit, so clearer reception may be possible. This is accomplished through the
Sync/NORMAL switch.
In the illustration below, there is interference from an adjacent channel above the channel
we wish to listen to (shaded black).
Since there is
interference
in the UPPER sideband due to the adjacent station, set the
Sync/NORMAL switch to the LOWER setting to isolate the LOWER sideband and
extract
the
UPPER sideband (with interference) from the signal so
only the lower, or LSB, is received
.
AM SENS (AM Sensitivity) Switch
As you listen to MW (Medium-‐Wave) and Radio NIKKEI – and under normal conditions -‐
keep the AM SENS switch on the HIGH (high sensitivity) setting. When you are listening to
very strong radio stations, nearby stations, or are getting interference, move the AM SENS
switch to the LOW setting.
