Yaesu FT-7800R, Руководство по эксплуатации

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21 FT-7800R O
PERATING
M
ANUAL
F
REQUENCY
N
AVIGATION
1) Tuning Dial
Rotating the
DIAL
knob allows tuning in the pre-programmed steps established for the VFO
frequency. Clockwise rotation of the DIAL knob causes the FT-7800R to be tuned toward a
higher frequency, while counter-clockwise rotation will
lower the operating frequency.
Press the [ MHz
(
PRI
)] key momentarily, then rotate the
DIAL
knob, to change the frequency steps to 1 MHz
per step. This feature is extremely useful for making
rapid frequency excursions over the wide tuning range
of the
FT-7800R .
2) Direct Keypad Frequency Entry (MH-48
A6J
Microphone)
The keypad of the
MH-48
A6J
DTMF Microphone may be used for direct entry of the oper-
ating frequency.
To enter a frequency from the MH-48
A6J
keypad, just press the numbered digits in the
proper sequence. There is no “Decimal point” key on the
MH-48
A6J
keypad.
Examples : To enter 146.480 MHz, press [
1
]
[
4
]
[
6
]
[
4
]
[
8
]
[
0
]
To enter 433.000 MHz, press [ 4
]
[ 3
]
[ 3
]
[ 0
]
[ 0
]
[ 0
]
3) Scanning
From the VFO mode, press and hold in the [
SCAN
(
SEL
)] key for 1/2 second, then rotate the
DIAL knob to select the bandwidth for the VFO scanner. Now, press the [ SCAN
(
SEL
)] key
momentarily to initiate scanning toward a higher frequency. The
FT-7800R
will stop when it
receives a signal strong enough to break through the squelch threshold. The FT-7800R will
then hold on that frequency according to the setting of the “Resume” mode (Menu #37 ( SCAN );
see page 73). See page 41 for details regarding the VFO Scan operation.
If you wish to reverse the direction of the scan (i.e. toward a lower frequency, instead of a
higher frequency), just rotate the
DIAL
knob one click in the counter-clockwise direction
while the FT-7800R is scanning. The scanning direction will be reversed. To revert to scan-
ning toward a higher frequency once more, rotate the
DIAL
knob one click clockwise.
Press the [
SCAN
(
SEL
)] key (or the
PTT
key) again to stop scanning.
You may also initiate the scanner by pressing and holding in the microphone’s
[UP] or [DWN] key. However, in this case, the scanner will sweep frequencies
only on the current band. If you would like the scanner not to be restricted to the current
band, you may change Menu #46 (VFO.BND) to allow the scanner to hop to the low edge
of the next-highest band when the VFO frequency reaches the high end of the current
band (or vice- versa). See page 75 for details.
B
ASIC
O
PERATION