Yaesu FRG-100 Operating Manual page 29

any significance you choose. As mentioned before,
the fifty memory channels are common and used
by both Memory and Group Scanning Modes.
Therefore, the order that you program them in
initially will determine their location or "address"
in the group structure. Of course, they can be ar-
ranged again or programmed later, but it might
save you some time to plan ahead.
For example, many shortwave AM broadcast
Stations transmit simultaneously on several me-
ter bands. By arranging meter bands by letter-
groups (vertically) and station origin by channel
number (horizontally) you could selectively scan
different stations on a common broadcast band, or
scan a common station over several of its transmis-
sion bands for the best signal quality. This is useful
when certain bands provide the best reception dur-
ing a particular time of the day or location, or if
you want to scan a particular station for the best
signal. The example below might help you get
started with your own ideas.
Broadcast Band Scanning
You can scan any of the 16 pre-programmed AM
broadcast bands previously described in the
Signal
Reception chapter. Refer to the chart in that chapter
for each band's frequency range.
The selected band will be scanned within it's
upper and lower limits for activity. Scan resume
and delay function are selectable the same way as
for other scan modes. To begin AM Broadcast Band
Scanning, perform the following steps (some of
these steps are duplicated in the Signal
Reception
chapter).
0
First, enable Broadcast Band Selection, the en-
sure normal tuning speed is selected (FAST
should not appear in the display)
O
Press and hold SET then the UP A key momen-
tarily (a beep will sound).
0 Press the FAST key. Subsequent pressing of the
UP A DOWN V keys will now result in Broad-
cast Band stepping rather than frequency step-
ping as before.
Select AM and then a band to be scanned (the
receiver will display the lower band-edge fre-
quency).
O
Close the SQL control until the "BUSY" indica-
tor disappears, the press SCAN to begin.
Scan operation is similar to normal band scan-
ning, except that the upper and lower band limits
are pre-programmed, rather than defined by mem-
ory channels
1
a & I-, '
1 .
"Birdies"
Some spurious signals or ,'birdiesu are generated from inside your receiver, and can be heard while
tuning through various ranges. They usually appear as a steady carrier always found at the
same
frequency. There is no need to worry, as this is not an indication that your receiver is malfunctioning.
Actually, these signals are experienced to some extent in all communications receivers. Most birdies
are so well suppressed, you won't even notice them while tuning, however, you may find ones around
455 kHz, 10.485 MHz, 12.288 MHz and 22.700 MHz. These frequencies are related to thoseused by the
CPU and other circuits in your FRG-100.
You can determine if a suspected signal is a birdie by disconnecting your receiving antenna, pressing
both
A l T
buttons, and listening. If the signal is still present, chances are it's a birdie and you might
want to log it for future reference. If the signal disappears, you might be tuned to a commercial RTTY
or FAX broadcast station in idle (they often do this for hours on end).
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