Yaesu FT-920, Руководство по эксплуатации

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FT-920 Operating Manual
66
mentally identical in all modes of operation, but with
the following differences:
H
In the VFO mode, scanning causes the trans-
ceiver to sweep up or down the band, pausing
or halting on any signal encountered;
H
In the QMB mode, the scanner will scan only
the QMB memory bank;
H
In the “regular” Memory mode, the scanner will
scan the programmed memories, and can be
instructed to skip certain memories during
scanning;
H
In the “regular” Memory mode, with “Group”
Memory activated, the scanner will scan only
the memories within the current group; and
H
In the Programmable Memory Scan (PMS)
mode, the scanner will scan the band within
user-programmed frequency limits.
Scanning operation is easy to perform:
Q
Set the [SQL] (Squelch) control to the point where
background noise is silenced. A typical setting,
for effective scanning operation, will be at 12
o’clock or slightly clockwise from this position.
R
Set the transceiver into the operating configura-
tion in which you wish to scan (VFO, Memory,
QMB, etc.).
S
Press and hold in either the [U
P
] or [D
OWN
] switch
on the microphone to initiate scanning. On the MD-
100A8X, rotate the scanning ring to the left for
downward scan, or to the right for upward scan.
Note: If you are scanning in the VFO mode, note
that complete rotation of the scanning ring to the
end of its travel will place the radio in a “fast scan”
mode
which may aid you in navigating quickly
across a band.
T
The scanner will now cause the transceiver to in-
crement in the chosen direction until a signal is
detected. When a signal is encountered which
opens the Squelch, the scanner will pause until
the signal disappears (at the end of the other
station’s transmission), at which point the scan-
ner will resume. While the radio is in the “Pause”
condition, the decimal points in the Main VFO-A
frequency display area will blink. See “Scan-Re-
sume Choices” below for details of how to cus-
tomize the resumption of scanning.
U
Press the [PTT] switch on the microphone to can-
cel scanning and return to normal Tuning Dial
operation.
Scan Skip Programming (Memory Mode Only)
Among the memories you have programmed, there
may be some stations which you do not wish to scan.
For example, standard time stations like WWV, JJY,
CHU, LOL, RWM, or VNG transmit a continuous car-
rier which might always stop the scanner (thus pre-
venting you from encountering a different station).
Therefore, you may designate certain memory chan-
nels to be skipped during scanning, but otherwise
left intact for manual channel selection.
Here’s how to remove a channel from the scanning
loop:
Q
Recall the memory channel to be skipped.
R
Press and hold in the [M
EM
G
ROUP
] key for ½ sec-
ond, until the “S
CAN
” indicator on the display panel
goes off; this shows that this channel is now not
eligible for scanning.
S
Repeat steps
Q
and
R
as many times as neces-
sary to skip all the channels you do not wish to
scan.
T
Initiate memory scanning (as described previ-
ously), and you will observe that the channels you
marked to be skipped are not included in the scan-
ning loop. Press the [PTT] switch to stop the scan;
now use the front panel or microphone [U
P
] or
[D
OWN
] key to step through the channels manu-
ally - one at a time - and you will observe that the
“skipped” channels are, nonetheless, available for
recall by manual means.
U
You may restore a previously-skipped channel to
the scanning loop by selecting the channel manu-
ally; then press the [M
EM
G
ROUP
] switch for ½ sec-
ond until the “S
CAN
” indicator is restored to the
frequency display panel.
Programmable Memory Scan (PMS) Operation
The PMS scanning mode allows you to set up band
limits within which to scan. For example, you might
elect to scan 50.0 to 50.4 MHz in USB mode, watch-
ing for activity. The procedure for establishing such
band limits is quite easy:
Q
First, store the lower frequency limit in the “P-Lo”
memory channel, and the upper frequency limit in
the “P-Hi” memory channel. In the above example,
you would store 50.000 MHz in “P-Lo,” and 50.400
MHz in “P-Hi.”
R
Next, switch from the VFO mode to the Memory
mode by pressing [VFO/M
EM
].
g p