Signal Reception; Am Broadcast Reception; Broadcast Band Selection Mode; Ssb Reception - Yaesu FRG-100 Operating Manual

Signal Reception
A M Broadcast Reception
To enable this feature, perform the following
Most commercial broadcast stations below 30
MHz use AM (Amplitude Modulation). Pressing
the AMIN mode button once (when switching from
another mode), selects the 6-kHz AM wide band-
width. This gives the highest fidelity, and is best on
strong AM signals (and particularly music). For
weaker AM signals, or where adjacent channel in-
terference is present, the narrower 2.4- kHz IF
bandwidth offers a compromise between interfer-
ence rejection and fidelity This can be selected by
pressing AMIN again ("NAR" appears at the top of
the display). When tuning an AM broadcast station
(and in all modes), use your signal strength meter
as a tuning aid. Simply tune for maximum S-meter
indication. Tuning speed can be adjusted to your
preference as described in the previous chapter.
AM broadcast stations can be found throughout
the LF, MF and HF spectrum, but there are some
bands where broadcasts stations frequently trans-
mit. The FRG-100 has a special Broadcast Band se-
lection mode that will aid you in selecting and
tuning among these bands.
Broadcast Band Selection Mode
This feature enables you to easily select and
tune the following common
AM broadcast bands
as shown on the chart below.
steps.
0 Ensure normal tuning speed is selected (FAST
should not appear in the display)
0 Press and hold SET then the UP A key momen-
tarily (a beep will sound).
0
Press the FAST key. Subsequently pressing of
the UP A DOWN
' I
keys will now result in
Broadcast Band stepping rather than frequency
stepping as before.
The receiver will display the lower band-edge
frequency, tune around each range to find new
stations (see chart).
If you step to a different band after tuning
around in the previous one, the last tuned fre-
quency is saved, and will be displayed upon re-
turning to that band.
0 Repeating the first two steps above will return
to normal operation.
SSB Reception
Single Sideband (SSB) is a commonly used
mode of communication by a variety of services.
Such examples include Amateur Radio, Marine
Radiotelephone, Citizens Band(CB), Aeronautical
and Military communications to name a few. Up-
per Sideband (USB) is generally the most com-
monly used mode, however lower side-band
(LSB) can be found, for example, in Amateur Radio
communications below 10 MHz.
From any mode, simply press the SSB button
for the desired sideband ("USB" or "LSB" will
appear at the top of the display). Slowly tune across
the signal until the audio becomes under-
standable. Try switching to LSB and re-tuning if
AM and USB modes fail to demodulate what ap-
pears to be a voice signal. For fine tuning a SSB
signal, normal (10 Hz frequency steps) tuning
speed is best, FAST lets you tune the band rapidly
Note: For even better reception of weak
AM
signals, or those experiencing adjacent channel in-
terference, you can switch to an SSB mode (which-
ever sideband gives the clearest reception) When
first switching to SSB from AM, an annoying het-
erodyne (tone) will usually be present on the sig-
nal, slowly fine-tune the signal for zero-beat (until
the pitch of the heterodyne lowers until it is no
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